odin-blend2d

ufbx.h (221736B)

---

 #ifndef UFBX_UFBX_H_INCLUDED
 #define UFBX_UFBX_H_INCLUDED
 
 // -- User configuration
 
 #if defined(UFBX_CONFIG_HEADER)
 	#include UFBX_CONFIG_HEADER
 #endif
 
 // -- Headers
 
 #if !defined(UFBX_NO_LIBC_TYPES)
 	#include <stdint.h>
 	#include <stddef.h>
 	#include <stdbool.h>
 #endif
 
 // -- Platform
 
 #ifndef UFBX_STDC
 	#if defined(__STDC_VERSION__)
 		#define UFBX_STDC __STDC_VERSION__
 	#else
 		#define UFBX_STDC 0
 	#endif
 #endif
 
 #ifndef UFBX_CPP
 	#if defined(__cplusplus)
 		#define UFBX_CPP __cplusplus
 	#else
 		#define UFBX_CPP 0
 	#endif
 #endif
 
 #ifndef UFBX_PLATFORM_MSC
 	#if !defined(UFBX_STANDARD_C) && defined(_MSC_VER)
 		#define UFBX_PLATFORM_MSC _MSC_VER
 	#else
 		#define UFBX_PLATFORM_MSC 0
 	#endif
 #endif
 
 #ifndef UFBX_PLATFORM_GNUC
 	#if !defined(UFBX_STANDARD_C) && defined(__GNUC__)
 		#define UFBX_PLATFORM_GNUC __GNUC__
 	#else
 		#define UFBX_PLATFORM_GNUC 0
 	#endif
 #endif
 
 #ifndef UFBX_CPP11
 	// MSVC does not advertise C++11 by default so we need special detection
 	#if UFBX_CPP >= 201103L || (UFBX_CPP > 0 && UFBX_PLATFORM_MSC >= 1900)
 		#define UFBX_CPP11 1
 	#else
 		#define UFBX_CPP11 0
 	#endif
 #endif
 
 #if defined(_MSC_VER)
 	#pragma warning(push)
 	#pragma warning(disable: 4061) // enumerator 'ENUM' in switch of enum 'enum' is not explicitly handled by a case label
 	#pragma warning(disable: 4201) // nonstandard extension used: nameless struct/union
 	#pragma warning(disable: 4505) // unreferenced local function has been removed
 	#pragma warning(disable: 4820) // type': 'N' bytes padding added after data member 'member'
 #elif defined(__clang__)
 	#pragma clang diagnostic push
 	#pragma clang diagnostic ignored "-Wpedantic"
 	#pragma clang diagnostic ignored "-Wpadded"
 	#if defined(__cplusplus)
 		#pragma clang diagnostic ignored "-Wzero-as-null-pointer-constant"
 		#pragma clang diagnostic ignored "-Wold-style-cast"
 	#endif
 #elif defined(__GNUC__)
 	#pragma GCC diagnostic push
 	#pragma GCC diagnostic ignored "-Wpedantic"
 	#pragma GCC diagnostic ignored "-Wpadded"
 	#if defined(__cplusplus)
 		#pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
 		#pragma GCC diagnostic ignored "-Wold-style-cast"
 	#else
 		#if __GNUC__ >= 5
 			#pragma GCC diagnostic ignored "-Wc90-c99-compat"
 			#pragma GCC diagnostic ignored "-Wc99-c11-compat"
 		#endif
 	#endif
 #endif
 
 #if UFBX_PLATFORM_MSC
 	#define ufbx_inline static __forceinline
 #elif UFBX_PLATFORM_GNUC
 	#define ufbx_inline static inline __attribute__((always_inline, unused))
 #else
 	#define ufbx_inline static
 #endif
 
 // Assertion function used in ufbx, defaults to C standard `assert()`.
 // You can define this to your custom preferred assert macro, but in that case
 // make sure that it is also used within `ufbx.c`.
 // Defining `UFBX_NO_ASSERT` to any value disables assertions.
 #ifndef ufbx_assert
 	#if defined(UFBX_NO_ASSERT) || defined(UFBX_NO_LIBC)
 		#define ufbx_assert(cond) (void)0
 	#else
 		#include <assert.h>
 		#define ufbx_assert(cond) assert(cond)
 	#endif
 #endif
 
 // Pointer may be `NULL`.
 #define ufbx_nullable
 
 // Changing this value from default or calling this function can lead into
 // breaking API guarantees.
 #define ufbx_unsafe
 
 // Linkage of the main ufbx API functions.
 // Defaults to nothing, or `static` if `UFBX_STATIC` is defined.
 // If you want to isolate ufbx to a single translation unit you can do the following:
 //   #define UFBX_STATIC
 //   #include "ufbx.h"
 //   #include "ufbx.c"
 #ifndef ufbx_abi
 	#if defined(UFBX_STATIC)
 		#define ufbx_abi static
 	#else
 		#define ufbx_abi
 	#endif
 #endif
 
 // Linkage of the main ufbx data fields in the header.
 // Defaults to `extern`, or `static` if `UFBX_STATIC` is defined.
 #ifndef ufbx_abi_data
 	#if defined(UFBX_STATIC)
 		#define ufbx_abi_data static
 	#else
 		#define ufbx_abi_data extern
 	#endif
 #endif
 
 // Linkage of the main ufbx data fields in the source.
 // Defaults to nothing, or `static` if `UFBX_STATIC` is defined.
 #ifndef ufbx_abi_data_definition
 	#if defined(UFBX_STATIC)
 		#define ufbx_abi_data_def static
 	#else
 		#define ufbx_abi_data_def
 	#endif
 #endif
 
 // -- Configuration
 
 #ifndef UFBX_REAL_TYPE
 	#if defined(UFBX_REAL_IS_FLOAT)
 		#define UFBX_REAL_TYPE float
 	#else
 		#define UFBX_REAL_TYPE double
 	#endif
 #endif
 
 // Limits for embedded arrays within structures.
 #define UFBX_ERROR_STACK_MAX_DEPTH 8
 #define UFBX_PANIC_MESSAGE_LENGTH 128
 #define UFBX_ERROR_INFO_LENGTH 256
 
 // Number of thread groups to use if threading is enabled.
 // A thread group processes a number of tasks and is then waited and potentially
 // re-used later. In essence, this controls the granularity of threading.
 #define UFBX_THREAD_GROUP_COUNT 4
 
 // -- Language
 
 // bindgen-disable
 
 #if UFBX_CPP11
 
 template <typename T, typename U>
 struct ufbxi_type_is { };
 
 template <typename T>
 struct ufbxi_type_is<T, T> { using type = int; };
 
 template <typename T>
 struct ufbx_converter { };
 
 #define UFBX_CONVERSION_IMPL(p_name) \
 	template <typename T, typename S=typename ufbxi_type_is<T, decltype(ufbx_converter<T>::from(*(const p_name*)nullptr))>::type> \
 	operator T() const { return ufbx_converter<T>::from(*this); }
 
 #define UFBX_CONVERSION_TO_IMPL(p_name) \
 	template <typename T, typename S=typename ufbxi_type_is<p_name, decltype(ufbx_converter<T>::to(*(const T*)nullptr))>::type> \
 	p_name(const T &t) { *this = ufbx_converter<T>::to(t); }
 
 #define UFBX_CONVERSION_LIST_IMPL(p_name) \
 	template <typename T, typename S=typename ufbxi_type_is<T, decltype(ufbx_converter<T>::from_list((p_name*)nullptr, (size_t)0))>::type> \
 	operator T() const { return ufbx_converter<T>::from_list(data, count); }
 
 #else
 
 #define UFBX_CONVERSION_IMPL(p_name)
 #define UFBX_CONVERSION_TO_IMPL(p_name)
 #define UFBX_CONVERSION_LIST_IMPL(p_name)
 
 #endif
 
 #if defined(__cplusplus)
 	#define UFBX_LIST_TYPE(p_name, p_type) struct p_name { p_type *data; size_t count; \
 		p_type &operator[](size_t index) const { ufbx_assert(index < count); return data[index]; } \
 		p_type *begin() const { return data; } \
 		p_type *end() const { return data + count; } \
 		UFBX_CONVERSION_LIST_IMPL(p_type) \
 	}
 #else
 	#define UFBX_LIST_TYPE(p_name, p_type) typedef struct p_name { p_type *data; size_t count; } p_name
 #endif
 
 // This cannot be enabled automatically if supported as the source file may be
 // compiled with a different compiler using different settings than the header
 // consumers, in practice it should work but it causes issues such as #70.
 #if (UFBX_STDC >= 202311L || UFBX_CPP11) && defined(UFBX_USE_EXPLICIT_ENUM)
 	#define UFBX_ENUM_REPR : int
 	#define UFBX_ENUM_FORCE_WIDTH(p_prefix)
 	#define UFBX_FLAG_REPR : int
 	#define UFBX_FLAG_FORCE_WIDTH(p_prefix)
 	#define UFBX_HAS_FORCE_32BIT 0
 #else
 	#define UFBX_ENUM_REPR
 	#define UFBX_ENUM_FORCE_WIDTH(p_prefix) p_prefix##_FORCE_32BIT = 0x7fffffff
 	#define UFBX_FLAG_REPR
 	#define UFBX_FLAG_FORCE_WIDTH(p_prefix) p_prefix##_FORCE_32BIT = 0x7fffffff
 	#define UFBX_HAS_FORCE_32BIT 1
 #endif
 
 #define UFBX_ENUM_TYPE(p_name, p_prefix, p_last) \
 	enum { p_prefix##_COUNT = p_last + 1 }
 
 #if UFBX_CPP
 	#define UFBX_VERTEX_ATTRIB_IMPL(p_type) \
 		p_type &operator[](size_t index) const { ufbx_assert(index < indices.count); return values.data[indices.data[index]]; }
 #else
 	#define UFBX_VERTEX_ATTRIB_IMPL(p_type)
 #endif
 
 #if UFBX_CPP11
 	#define UFBX_CALLBACK_IMPL(p_name, p_fn, p_return, p_params, p_args) \
 		template <typename F> static p_return _cpp_adapter p_params { F &f = *static_cast<F*>(user); return f p_args; } \
 		p_name() = default; \
 		p_name(p_fn *f) : fn(f), user(nullptr) { } \
 		template <typename F> p_name(F *f) : fn(&_cpp_adapter<F>), user(static_cast<void*>(f)) { }
 #else
 	#define UFBX_CALLBACK_IMPL(p_name, p_fn, p_return, p_params, p_args)
 #endif
 
 // bindgen-enable
 
 // -- Version
 
 // Packing/unpacking for `UFBX_HEADER_VERSION` and `ufbx_source_version`.
 #define ufbx_pack_version(major, minor, patch) ((uint32_t)(major)*1000000u + (uint32_t)(minor)*1000u + (uint32_t)(patch))
 #define ufbx_version_major(version) ((uint32_t)(version)/1000000u%1000u)
 #define ufbx_version_minor(version) ((uint32_t)(version)/1000u%1000u)
 #define ufbx_version_patch(version) ((uint32_t)(version)%1000u)
 
 // Version of the ufbx header.
 // `UFBX_VERSION` is simply an alias of `UFBX_HEADER_VERSION`.
 // `ufbx_source_version` contains the version of the corresponding source file.
 // HINT: The version can be compared numerically to the result of `ufbx_pack_version()`,
 // for example `#if UFBX_VERSION >= ufbx_pack_version(0, 12, 0)`.
 #define UFBX_HEADER_VERSION ufbx_pack_version(0, 18, 0)
 #define UFBX_VERSION UFBX_HEADER_VERSION
 
 // -- Basic types
 
 // Main floating point type used everywhere in ufbx, defaults to `double`.
 // If you define `UFBX_REAL_IS_FLOAT` to any value, `ufbx_real` will be defined
 // as `float` instead.
 // You can also manually define `UFBX_REAL_TYPE` to any floating point type.
 typedef UFBX_REAL_TYPE ufbx_real;
 
 // Null-terminated UTF-8 encoded string within an FBX file
 typedef struct ufbx_string {
 	const char *data;
 	size_t length;
 
 	UFBX_CONVERSION_IMPL(ufbx_string)
 } ufbx_string;
 
 // Opaque byte buffer blob
 typedef struct ufbx_blob {
 	const void *data;
 	size_t size;
 
 	UFBX_CONVERSION_IMPL(ufbx_blob)
 } ufbx_blob;
 
 // 2D vector
 typedef struct ufbx_vec2 {
 	union {
 		struct { ufbx_real x, y; };
 		ufbx_real v[2];
 	};
 
 	UFBX_CONVERSION_IMPL(ufbx_vec2)
 } ufbx_vec2;
 
 // 3D vector
 typedef struct ufbx_vec3 {
 	union {
 		struct { ufbx_real x, y, z; };
 		ufbx_real v[3];
 	};
 
 	UFBX_CONVERSION_IMPL(ufbx_vec3)
 } ufbx_vec3;
 
 // 4D vector
 typedef struct ufbx_vec4 {
 	union {
 		struct { ufbx_real x, y, z, w; };
 		ufbx_real v[4];
 	};
 
 	UFBX_CONVERSION_IMPL(ufbx_vec4)
 } ufbx_vec4;
 
 // Quaternion
 typedef struct ufbx_quat {
 	union {
 		struct { ufbx_real x, y, z, w; };
 		ufbx_real v[4];
 	};
 
 	UFBX_CONVERSION_IMPL(ufbx_quat)
 } ufbx_quat;
 
 // Order in which Euler-angle rotation axes are applied for a transform
 // NOTE: The order in the name refers to the order of axes *applied*,
 // not the multiplication order: eg. `UFBX_ROTATION_ORDER_XYZ` is `Z*Y*X`
 // [TODO: Figure out what the spheric rotation order is...]
 typedef enum ufbx_rotation_order UFBX_ENUM_REPR {
 	UFBX_ROTATION_ORDER_XYZ,
 	UFBX_ROTATION_ORDER_XZY,
 	UFBX_ROTATION_ORDER_YZX,
 	UFBX_ROTATION_ORDER_YXZ,
 	UFBX_ROTATION_ORDER_ZXY,
 	UFBX_ROTATION_ORDER_ZYX,
 	UFBX_ROTATION_ORDER_SPHERIC,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_ROTATION_ORDER)
 } ufbx_rotation_order;
 
 UFBX_ENUM_TYPE(ufbx_rotation_order, UFBX_ROTATION_ORDER, UFBX_ROTATION_ORDER_SPHERIC);
 
 // Explicit translation+rotation+scale transformation.
 // NOTE: Rotation is a quaternion, not Euler angles!
 typedef struct ufbx_transform {
 	ufbx_vec3 translation;
 	ufbx_quat rotation;
 	ufbx_vec3 scale;
 
 	UFBX_CONVERSION_IMPL(ufbx_transform)
 } ufbx_transform;
 
 // 4x3 matrix encoding an affine transformation.
 // `cols[0..2]` are the X/Y/Z basis vectors, `cols[3]` is the translation
 typedef struct ufbx_matrix {
 	union {
 		struct {
 			ufbx_real m00, m10, m20;
 			ufbx_real m01, m11, m21;
 			ufbx_real m02, m12, m22;
 			ufbx_real m03, m13, m23;
 		};
 		ufbx_vec3 cols[4];
 		ufbx_real v[12];
 	};
 
 	UFBX_CONVERSION_IMPL(ufbx_matrix)
 } ufbx_matrix;
 
 typedef struct ufbx_void_list {
 	void *data;
 	size_t count;
 } ufbx_void_list;
 
 UFBX_LIST_TYPE(ufbx_bool_list, bool);
 UFBX_LIST_TYPE(ufbx_uint32_list, uint32_t);
 UFBX_LIST_TYPE(ufbx_real_list, ufbx_real);
 UFBX_LIST_TYPE(ufbx_vec2_list, ufbx_vec2);
 UFBX_LIST_TYPE(ufbx_vec3_list, ufbx_vec3);
 UFBX_LIST_TYPE(ufbx_vec4_list, ufbx_vec4);
 UFBX_LIST_TYPE(ufbx_string_list, ufbx_string);
 
 // Sentinel value used to represent a missing index.
 #define UFBX_NO_INDEX ((uint32_t)~0u)
 
 // -- Document object model
 
 typedef enum ufbx_dom_value_type UFBX_ENUM_REPR {
 	UFBX_DOM_VALUE_NUMBER,
 	UFBX_DOM_VALUE_STRING,
 	UFBX_DOM_VALUE_ARRAY_I8,
 	UFBX_DOM_VALUE_ARRAY_I32,
 	UFBX_DOM_VALUE_ARRAY_I64,
 	UFBX_DOM_VALUE_ARRAY_F32,
 	UFBX_DOM_VALUE_ARRAY_F64,
 	UFBX_DOM_VALUE_ARRAY_RAW_STRING,
 	UFBX_DOM_VALUE_ARRAY_IGNORED,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_DOM_VALUE_TYPE)
 } ufbx_dom_value_type;
 
 UFBX_ENUM_TYPE(ufbx_dom_value_type, UFBX_DOM_VALUE_TYPE, UFBX_DOM_VALUE_ARRAY_IGNORED);
 
 typedef struct ufbx_dom_node ufbx_dom_node;
 
 typedef struct ufbx_dom_value {
 	ufbx_dom_value_type type;
 	ufbx_string value_str;
 	ufbx_blob value_blob;
 	int64_t value_int;
 	double value_float;
 } ufbx_dom_value;
 
 UFBX_LIST_TYPE(ufbx_dom_node_list, ufbx_dom_node*);
 UFBX_LIST_TYPE(ufbx_dom_value_list, ufbx_dom_value);
 
 struct ufbx_dom_node {
 	ufbx_string name;
 	ufbx_dom_node_list children;
 	ufbx_dom_value_list values;
 };
 
 // -- Properties
 
 // FBX elements have properties which are arbitrary key/value pairs that can
 // have inherited default values or be animated. In most cases you don't need
 // to access these unless you need a feature not implemented directly in ufbx.
 // NOTE: Prefer using `ufbx_find_prop[_len](...)` to search for a property by
 // name as it can find it from the defaults if necessary.
 
 typedef struct ufbx_prop ufbx_prop;
 typedef struct ufbx_props ufbx_props;
 
 // Data type contained within the property. All the data fields are always
 // populated regardless of type, so there's no need to switch by type usually
 // eg. `prop->value_real` and `prop->value_int` have the same value (well, close)
 // if `prop->type == UFBX_PROP_INTEGER`. String values are not converted from/to.
 typedef enum ufbx_prop_type UFBX_ENUM_REPR {
 	UFBX_PROP_UNKNOWN,
 	UFBX_PROP_BOOLEAN,
 	UFBX_PROP_INTEGER,
 	UFBX_PROP_NUMBER,
 	UFBX_PROP_VECTOR,
 	UFBX_PROP_COLOR,
 	UFBX_PROP_COLOR_WITH_ALPHA,
 	UFBX_PROP_STRING,
 	UFBX_PROP_DATE_TIME,
 	UFBX_PROP_TRANSLATION,
 	UFBX_PROP_ROTATION,
 	UFBX_PROP_SCALING,
 	UFBX_PROP_DISTANCE,
 	UFBX_PROP_COMPOUND,
 	UFBX_PROP_BLOB,
 	UFBX_PROP_REFERENCE,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_PROP_TYPE)
 } ufbx_prop_type;
 
 UFBX_ENUM_TYPE(ufbx_prop_type, UFBX_PROP_TYPE, UFBX_PROP_REFERENCE);
 
 // Property flags: Advanced information about properties, not usually needed.
 typedef enum ufbx_prop_flags UFBX_FLAG_REPR {
 	// Supports animation.
 	// NOTE: ufbx ignores this and allows animations on non-animatable properties.
 	UFBX_PROP_FLAG_ANIMATABLE = 0x1,
 
 	// User defined (custom) property.
 	UFBX_PROP_FLAG_USER_DEFINED = 0x2,
 
 	// Hidden in UI.
 	UFBX_PROP_FLAG_HIDDEN = 0x4,
 
 	// Disallow modification from UI for components.
 	UFBX_PROP_FLAG_LOCK_X = 0x10,
 	UFBX_PROP_FLAG_LOCK_Y = 0x20,
 	UFBX_PROP_FLAG_LOCK_Z = 0x40,
 	UFBX_PROP_FLAG_LOCK_W = 0x80,
 
 	// Disable animation from components.
 	UFBX_PROP_FLAG_MUTE_X = 0x100,
 	UFBX_PROP_FLAG_MUTE_Y = 0x200,
 	UFBX_PROP_FLAG_MUTE_Z = 0x400,
 	UFBX_PROP_FLAG_MUTE_W = 0x800,
 
 	// Property created by ufbx when an element has a connected `ufbx_anim_prop`
 	// but doesn't contain the `ufbx_prop` it's referring to.
 	// NOTE: The property may have been found in the templated defaults.
 	UFBX_PROP_FLAG_SYNTHETIC = 0x1000,
 
 	// The property has at least one `ufbx_anim_prop` in some layer.
 	UFBX_PROP_FLAG_ANIMATED = 0x2000,
 
 	// Used by `ufbx_evaluate_prop()` to indicate the the property was not found.
 	UFBX_PROP_FLAG_NOT_FOUND = 0x4000,
 
 	// The property is connected to another one.
 	// This use case is relatively rare so `ufbx_prop` does not track connections
 	// directly. You can find connections from `ufbx_element.connections_dst` where
 	// `ufbx_connection.dst_prop` is this property and `ufbx_connection.src_prop` is defined.
 	UFBX_PROP_FLAG_CONNECTED = 0x8000,
 
 	// The value of this property is undefined (represented as zero).
 	UFBX_PROP_FLAG_NO_VALUE = 0x10000,
 
 	// This property has been overridden by the user.
 	// See `ufbx_anim.prop_overrides` for more information.
 	UFBX_PROP_FLAG_OVERRIDDEN = 0x20000,
 
 	// Value type.
 	// `REAL/VEC2/VEC3/VEC4` are mutually exclusive but may coexist with eg. `STRING`
 	// in some rare cases where the string defines the unit for the vector.
 	UFBX_PROP_FLAG_VALUE_REAL = 0x100000,
 	UFBX_PROP_FLAG_VALUE_VEC2 = 0x200000,
 	UFBX_PROP_FLAG_VALUE_VEC3 = 0x400000,
 	UFBX_PROP_FLAG_VALUE_VEC4 = 0x800000,
 	UFBX_PROP_FLAG_VALUE_INT  = 0x1000000,
 	UFBX_PROP_FLAG_VALUE_STR  = 0x2000000,
 	UFBX_PROP_FLAG_VALUE_BLOB = 0x4000000,
 
 	UFBX_FLAG_FORCE_WIDTH(UFBX_PROP_FLAGS)
 } ufbx_prop_flags;
 
 // Single property with name/type/value.
 struct ufbx_prop {
 	ufbx_string name;
 
 	uint32_t _internal_key;
 
 	ufbx_prop_type type;
 	ufbx_prop_flags flags;
 
 	ufbx_string value_str;
 	ufbx_blob value_blob;
 	int64_t value_int;
 	union {
 		ufbx_real value_real_arr[4];
 		ufbx_real value_real;
 		ufbx_vec2 value_vec2;
 		ufbx_vec3 value_vec3;
 		ufbx_vec4 value_vec4;
 	};
 };
 
 UFBX_LIST_TYPE(ufbx_prop_list, ufbx_prop);
 
 // List of alphabetically sorted properties with potential defaults.
 // For animated objects in as scene from `ufbx_evaluate_scene()` this list
 // only has the animated properties, the originals are stored under `defaults`.
 struct ufbx_props {
 	ufbx_prop_list props;
 	size_t num_animated;
 
 	ufbx_nullable ufbx_props *defaults;
 };
 
 typedef struct ufbx_scene ufbx_scene;
 
 // -- Elements
 
 // Element is the lowest level representation of the FBX file in ufbx.
 // An element contains type, id, name, and properties (see `ufbx_props` above)
 // Elements may be connected to each other arbitrarily via `ufbx_connection`
 
 typedef struct ufbx_element ufbx_element;
 
 // Unknown
 typedef struct ufbx_unknown ufbx_unknown;
 
 // Nodes
 typedef struct ufbx_node ufbx_node;
 
 // Node attributes (common)
 typedef struct ufbx_mesh ufbx_mesh;
 typedef struct ufbx_light ufbx_light;
 typedef struct ufbx_camera ufbx_camera;
 typedef struct ufbx_bone ufbx_bone;
 typedef struct ufbx_empty ufbx_empty;
 
 // Node attributes (curves/surfaces)
 typedef struct ufbx_line_curve ufbx_line_curve;
 typedef struct ufbx_nurbs_curve ufbx_nurbs_curve;
 typedef struct ufbx_nurbs_surface ufbx_nurbs_surface;
 typedef struct ufbx_nurbs_trim_surface ufbx_nurbs_trim_surface;
 typedef struct ufbx_nurbs_trim_boundary ufbx_nurbs_trim_boundary;
 
 // Node attributes (advanced)
 typedef struct ufbx_procedural_geometry ufbx_procedural_geometry;
 typedef struct ufbx_stereo_camera ufbx_stereo_camera;
 typedef struct ufbx_camera_switcher ufbx_camera_switcher;
 typedef struct ufbx_marker ufbx_marker;
 typedef struct ufbx_lod_group ufbx_lod_group;
 
 // Deformers
 typedef struct ufbx_skin_deformer ufbx_skin_deformer;
 typedef struct ufbx_skin_cluster ufbx_skin_cluster;
 typedef struct ufbx_blend_deformer ufbx_blend_deformer;
 typedef struct ufbx_blend_channel ufbx_blend_channel;
 typedef struct ufbx_blend_shape ufbx_blend_shape;
 typedef struct ufbx_cache_deformer ufbx_cache_deformer;
 typedef struct ufbx_cache_file ufbx_cache_file;
 
 // Materials
 typedef struct ufbx_material ufbx_material;
 typedef struct ufbx_texture ufbx_texture;
 typedef struct ufbx_video ufbx_video;
 typedef struct ufbx_shader ufbx_shader;
 typedef struct ufbx_shader_binding ufbx_shader_binding;
 
 // Animation
 typedef struct ufbx_anim_stack ufbx_anim_stack;
 typedef struct ufbx_anim_layer ufbx_anim_layer;
 typedef struct ufbx_anim_value ufbx_anim_value;
 typedef struct ufbx_anim_curve ufbx_anim_curve;
 
 // Collections
 typedef struct ufbx_display_layer ufbx_display_layer;
 typedef struct ufbx_selection_set ufbx_selection_set;
 typedef struct ufbx_selection_node ufbx_selection_node;
 
 // Constraints
 typedef struct ufbx_character ufbx_character;
 typedef struct ufbx_constraint ufbx_constraint;
 
 // Audio
 typedef struct ufbx_audio_layer ufbx_audio_layer;
 typedef struct ufbx_audio_clip ufbx_audio_clip;
 
 // Miscellaneous
 typedef struct ufbx_pose ufbx_pose;
 typedef struct ufbx_metadata_object ufbx_metadata_object;
 
 UFBX_LIST_TYPE(ufbx_element_list, ufbx_element*);
 UFBX_LIST_TYPE(ufbx_unknown_list, ufbx_unknown*);
 UFBX_LIST_TYPE(ufbx_node_list, ufbx_node*);
 UFBX_LIST_TYPE(ufbx_mesh_list, ufbx_mesh*);
 UFBX_LIST_TYPE(ufbx_light_list, ufbx_light*);
 UFBX_LIST_TYPE(ufbx_camera_list, ufbx_camera*);
 UFBX_LIST_TYPE(ufbx_bone_list, ufbx_bone*);
 UFBX_LIST_TYPE(ufbx_empty_list, ufbx_empty*);
 UFBX_LIST_TYPE(ufbx_line_curve_list, ufbx_line_curve*);
 UFBX_LIST_TYPE(ufbx_nurbs_curve_list, ufbx_nurbs_curve*);
 UFBX_LIST_TYPE(ufbx_nurbs_surface_list, ufbx_nurbs_surface*);
 UFBX_LIST_TYPE(ufbx_nurbs_trim_surface_list, ufbx_nurbs_trim_surface*);
 UFBX_LIST_TYPE(ufbx_nurbs_trim_boundary_list, ufbx_nurbs_trim_boundary*);
 UFBX_LIST_TYPE(ufbx_procedural_geometry_list, ufbx_procedural_geometry*);
 UFBX_LIST_TYPE(ufbx_stereo_camera_list, ufbx_stereo_camera*);
 UFBX_LIST_TYPE(ufbx_camera_switcher_list, ufbx_camera_switcher*);
 UFBX_LIST_TYPE(ufbx_marker_list, ufbx_marker*);
 UFBX_LIST_TYPE(ufbx_lod_group_list, ufbx_lod_group*);
 UFBX_LIST_TYPE(ufbx_skin_deformer_list, ufbx_skin_deformer*);
 UFBX_LIST_TYPE(ufbx_skin_cluster_list, ufbx_skin_cluster*);
 UFBX_LIST_TYPE(ufbx_blend_deformer_list, ufbx_blend_deformer*);
 UFBX_LIST_TYPE(ufbx_blend_channel_list, ufbx_blend_channel*);
 UFBX_LIST_TYPE(ufbx_blend_shape_list, ufbx_blend_shape*);
 UFBX_LIST_TYPE(ufbx_cache_deformer_list, ufbx_cache_deformer*);
 UFBX_LIST_TYPE(ufbx_cache_file_list, ufbx_cache_file*);
 UFBX_LIST_TYPE(ufbx_material_list, ufbx_material*);
 UFBX_LIST_TYPE(ufbx_texture_list, ufbx_texture*);
 UFBX_LIST_TYPE(ufbx_video_list, ufbx_video*);
 UFBX_LIST_TYPE(ufbx_shader_list, ufbx_shader*);
 UFBX_LIST_TYPE(ufbx_shader_binding_list, ufbx_shader_binding*);
 UFBX_LIST_TYPE(ufbx_anim_stack_list, ufbx_anim_stack*);
 UFBX_LIST_TYPE(ufbx_anim_layer_list, ufbx_anim_layer*);
 UFBX_LIST_TYPE(ufbx_anim_value_list, ufbx_anim_value*);
 UFBX_LIST_TYPE(ufbx_anim_curve_list, ufbx_anim_curve*);
 UFBX_LIST_TYPE(ufbx_display_layer_list, ufbx_display_layer*);
 UFBX_LIST_TYPE(ufbx_selection_set_list, ufbx_selection_set*);
 UFBX_LIST_TYPE(ufbx_selection_node_list, ufbx_selection_node*);
 UFBX_LIST_TYPE(ufbx_character_list, ufbx_character*);
 UFBX_LIST_TYPE(ufbx_constraint_list, ufbx_constraint*);
 UFBX_LIST_TYPE(ufbx_audio_layer_list, ufbx_audio_layer*);
 UFBX_LIST_TYPE(ufbx_audio_clip_list, ufbx_audio_clip*);
 UFBX_LIST_TYPE(ufbx_pose_list, ufbx_pose*);
 UFBX_LIST_TYPE(ufbx_metadata_object_list, ufbx_metadata_object*);
 
 typedef enum ufbx_element_type UFBX_ENUM_REPR {
 	UFBX_ELEMENT_UNKNOWN,             // < `ufbx_unknown`
 	UFBX_ELEMENT_NODE,                // < `ufbx_node`
 	UFBX_ELEMENT_MESH,                // < `ufbx_mesh`
 	UFBX_ELEMENT_LIGHT,               // < `ufbx_light`
 	UFBX_ELEMENT_CAMERA,              // < `ufbx_camera`
 	UFBX_ELEMENT_BONE,                // < `ufbx_bone`
 	UFBX_ELEMENT_EMPTY,               // < `ufbx_empty`
 	UFBX_ELEMENT_LINE_CURVE,          // < `ufbx_line_curve`
 	UFBX_ELEMENT_NURBS_CURVE,         // < `ufbx_nurbs_curve`
 	UFBX_ELEMENT_NURBS_SURFACE,       // < `ufbx_nurbs_surface`
 	UFBX_ELEMENT_NURBS_TRIM_SURFACE,  // < `ufbx_nurbs_trim_surface`
 	UFBX_ELEMENT_NURBS_TRIM_BOUNDARY, // < `ufbx_nurbs_trim_boundary`
 	UFBX_ELEMENT_PROCEDURAL_GEOMETRY, // < `ufbx_procedural_geometry`
 	UFBX_ELEMENT_STEREO_CAMERA,       // < `ufbx_stereo_camera`
 	UFBX_ELEMENT_CAMERA_SWITCHER,     // < `ufbx_camera_switcher`
 	UFBX_ELEMENT_MARKER,              // < `ufbx_marker`
 	UFBX_ELEMENT_LOD_GROUP,           // < `ufbx_lod_group`
 	UFBX_ELEMENT_SKIN_DEFORMER,       // < `ufbx_skin_deformer`
 	UFBX_ELEMENT_SKIN_CLUSTER,        // < `ufbx_skin_cluster`
 	UFBX_ELEMENT_BLEND_DEFORMER,      // < `ufbx_blend_deformer`
 	UFBX_ELEMENT_BLEND_CHANNEL,       // < `ufbx_blend_channel`
 	UFBX_ELEMENT_BLEND_SHAPE,         // < `ufbx_blend_shape`
 	UFBX_ELEMENT_CACHE_DEFORMER,      // < `ufbx_cache_deformer`
 	UFBX_ELEMENT_CACHE_FILE,          // < `ufbx_cache_file`
 	UFBX_ELEMENT_MATERIAL,            // < `ufbx_material`
 	UFBX_ELEMENT_TEXTURE,             // < `ufbx_texture`
 	UFBX_ELEMENT_VIDEO,               // < `ufbx_video`
 	UFBX_ELEMENT_SHADER,              // < `ufbx_shader`
 	UFBX_ELEMENT_SHADER_BINDING,      // < `ufbx_shader_binding`
 	UFBX_ELEMENT_ANIM_STACK,          // < `ufbx_anim_stack`
 	UFBX_ELEMENT_ANIM_LAYER,          // < `ufbx_anim_layer`
 	UFBX_ELEMENT_ANIM_VALUE,          // < `ufbx_anim_value`
 	UFBX_ELEMENT_ANIM_CURVE,          // < `ufbx_anim_curve`
 	UFBX_ELEMENT_DISPLAY_LAYER,       // < `ufbx_display_layer`
 	UFBX_ELEMENT_SELECTION_SET,       // < `ufbx_selection_set`
 	UFBX_ELEMENT_SELECTION_NODE,      // < `ufbx_selection_node`
 	UFBX_ELEMENT_CHARACTER,           // < `ufbx_character`
 	UFBX_ELEMENT_CONSTRAINT,          // < `ufbx_constraint`
 	UFBX_ELEMENT_AUDIO_LAYER,         // < `ufbx_audio_layer`
 	UFBX_ELEMENT_AUDIO_CLIP,          // < `ufbx_audio_clip`
 	UFBX_ELEMENT_POSE,                // < `ufbx_pose`
 	UFBX_ELEMENT_METADATA_OBJECT,     // < `ufbx_metadata_object`
 
 	UFBX_ELEMENT_TYPE_FIRST_ATTRIB = UFBX_ELEMENT_MESH,
 	UFBX_ELEMENT_TYPE_LAST_ATTRIB = UFBX_ELEMENT_LOD_GROUP,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_ELEMENT_TYPE)
 } ufbx_element_type;
 
 UFBX_ENUM_TYPE(ufbx_element_type, UFBX_ELEMENT_TYPE, UFBX_ELEMENT_METADATA_OBJECT);
 
 // Connection between two elements.
 // Source and destination are somewhat arbitrary but the destination is
 // often the "container" like a parent node or mesh containing a deformer.
 typedef struct ufbx_connection {
 	ufbx_element *src;
 	ufbx_element *dst;
 	ufbx_string src_prop;
 	ufbx_string dst_prop;
 } ufbx_connection;
 
 UFBX_LIST_TYPE(ufbx_connection_list, ufbx_connection);
 
 // Element "base-class" common to each element.
 // Some fields (like `connections_src`) are advanced and not visible
 // in the specialized element structs.
 // NOTE: The `element_id` value is consistent when loading the
 // _same_ file, but re-exporting the file will invalidate them.
 struct ufbx_element {
 	ufbx_string name;
 	ufbx_props props;
 	uint32_t element_id;
 	uint32_t typed_id;
 	ufbx_node_list instances;
 	ufbx_element_type type;
 	ufbx_connection_list connections_src;
 	ufbx_connection_list connections_dst;
 	ufbx_nullable ufbx_dom_node *dom_node;
 	ufbx_scene *scene;
 };
 
 // -- Unknown
 
 struct ufbx_unknown {
 	// Shared "base-class" header, see `ufbx_element`.
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// FBX format specific type information.
 	// In ASCII FBX format:
 	//   super_type: ID, "type::name", "sub_type" { ... }
 	ufbx_string type;
 	ufbx_string super_type;
 	ufbx_string sub_type;
 };
 
 // -- Nodes
 
 // Inherit type specifies how hierarchial node transforms are combined.
 // This only affects the final scaling, as rotation and translation are always
 // inherited correctly.
 // NOTE: These don't map to `"InheritType"` property as there may be new ones for
 // compatibility with various exporters.
 typedef enum ufbx_inherit_mode UFBX_ENUM_REPR {
 
 	// Normal matrix composition of hierarchy: `R*S*r*s`.
 	//   child.node_to_world = parent.node_to_world * child.node_to_parent;
 	UFBX_INHERIT_MODE_NORMAL,
 
 	// Ignore parent scale when computing the transform: `R*r*s`.
 	//   ufbx_transform t = node.local_transform;
 	//   t.translation *= parent.inherit_scale;
 	//   t.scale *= node.inherit_scale_node.inherit_scale;
 	//   child.node_to_world = parent.unscaled_node_to_world * t;
 	// Also known as "Segment scale compensate" in some software.
 	UFBX_INHERIT_MODE_IGNORE_PARENT_SCALE,
 
 	// Apply parent scale component-wise: `R*r*S*s`.
 	//   ufbx_transform t = node.local_transform;
 	//   t.translation *= parent.inherit_scale;
 	//   t.scale *= node.inherit_scale_node.inherit_scale;
 	//   child.node_to_world = parent.unscaled_node_to_world * t;
 	UFBX_INHERIT_MODE_COMPONENTWISE_SCALE,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_INHERIT_MODE)
 } ufbx_inherit_mode;
 
 UFBX_ENUM_TYPE(ufbx_inherit_mode, UFBX_INHERIT_MODE, UFBX_INHERIT_MODE_COMPONENTWISE_SCALE);
 
 // Axis used to mirror transformations for handedness conversion.
 typedef enum ufbx_mirror_axis UFBX_ENUM_REPR {
 
 	UFBX_MIRROR_AXIS_NONE,
 	UFBX_MIRROR_AXIS_X,
 	UFBX_MIRROR_AXIS_Y,
 	UFBX_MIRROR_AXIS_Z,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_MIRROR_AXIS)
 } ufbx_mirror_axis;
 
 UFBX_ENUM_TYPE(ufbx_mirror_axis, UFBX_MIRROR_AXIS, UFBX_MIRROR_AXIS_Z);
 
 // Nodes form the scene transformation hierarchy and can contain attached
 // elements such as meshes or lights. In normal cases a single `ufbx_node`
 // contains only a single attached element, so using `type/mesh/...` is safe.
 struct ufbx_node {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Node hierarchy
 
 	// Parent node containing this one if not root.
 	//
 	// Always non-`NULL` for non-root nodes unless
 	// `ufbx_load_opts.allow_nodes_out_of_root` is enabled.
 	ufbx_nullable ufbx_node *parent;
 
 	// List of child nodes parented to this node.
 	ufbx_node_list children;
 
 	// Common attached element type and typed pointers. Set to `NULL` if not in
 	// use, so checking `attrib_type` is not required.
 	//
 	// HINT: If you need less common attributes access `ufbx_node.attrib`, you
 	// can use utility functions like `ufbx_as_nurbs_curve(attrib)` to convert
 	// and check the attribute in one step.
 	ufbx_nullable ufbx_mesh *mesh;
 	ufbx_nullable ufbx_light *light;
 	ufbx_nullable ufbx_camera *camera;
 	ufbx_nullable ufbx_bone *bone;
 
 	// Less common attributes use these fields.
 	//
 	// Defined even if it is one of the above, eg. `ufbx_mesh`. In case there
 	// is multiple attributes this will be the first one.
 	ufbx_nullable ufbx_element *attrib;
 
 	// Geometry transform helper if one exists.
 	// See `UFBX_GEOMETRY_TRANSFORM_HANDLING_HELPER_NODES`.
 	ufbx_nullable ufbx_node *geometry_transform_helper;
 
 	// Scale helper if one exists.
 	// See `UFBX_INHERIT_MODE_HANDLING_HELPER_NODES`.
 	ufbx_nullable ufbx_node *scale_helper;
 
 	// `attrib->type` if `attrib` is defined, otherwise `UFBX_ELEMENT_UNKNOWN`.
 	ufbx_element_type attrib_type;
 
 	// List of _all_ attached attribute elements.
 	//
 	// In most cases there is only zero or one attributes per node, but if you
 	// have a very exotic FBX file nodes may have multiple attributes.
 	ufbx_element_list all_attribs;
 
 	// Local transform in parent, geometry transform is a non-inherited
 	// transform applied only to attachments like meshes
 	ufbx_inherit_mode inherit_mode;
 	ufbx_inherit_mode original_inherit_mode;
 	ufbx_transform local_transform;
 	ufbx_transform geometry_transform;
 
 	// Combined scale when using `UFBX_INHERIT_MODE_COMPONENTWISE_SCALE`.
 	// Contains `local_transform.scale` otherwise.
 	ufbx_vec3 inherit_scale;
 
 	// Node where scale is inherited from for `UFBX_INHERIT_MODE_COMPONENTWISE_SCALE`
 	// and even for `UFBX_INHERIT_MODE_IGNORE_PARENT_SCALE`.
 	// For componentwise-scale nodes, this will point to `parent`, for scale ignoring
 	// nodes this will point to the parent of the nearest componentwise-scaled node
 	// in the parent chain.
 	ufbx_nullable ufbx_node *inherit_scale_node;
 
 	// Raw Euler angles in degrees for those who want them
 
 	// Specifies the axis order `euler_rotation` is applied in.
 	ufbx_rotation_order rotation_order;
 	// Rotation around the local X/Y/Z axes in `rotation_order`.
 	// The angles are specified in degrees.
 	ufbx_vec3 euler_rotation;
 
 	// Matrices derived from the transformations, for transforming geometry
 	// prefer using `geometry_to_world` as that supports geometric transforms.
 
 	// Transform from this node to `parent` space.
 	// Equivalent to `ufbx_transform_to_matrix(&local_transform)`.
 	ufbx_matrix node_to_parent;
 	// Transform from this node to the world space, ie. multiplying all the
 	// `node_to_parent` matrices of the parent chain together.
 	ufbx_matrix node_to_world;
 	// Transform from the attribute to this node. Does not affect the transforms
 	// of `children`!
 	// Equivalent to `ufbx_transform_to_matrix(&geometry_transform)`.
 	ufbx_matrix geometry_to_node;
 	// Transform from attribute space to world space.
 	// Equivalent to `ufbx_matrix_mul(&node_to_world, &geometry_to_node)`.
 	ufbx_matrix geometry_to_world;
 	// Transform from this node to world space, ignoring self scaling.
 	ufbx_matrix unscaled_node_to_world;
 
 	// ufbx-specific adjustment for switching between coodrinate/unit systems.
 	// HINT: In most cases you don't need to deal with these as these are baked
 	// into all the transforms above and into `ufbx_evaluate_transform()`.
 	ufbx_vec3 adjust_pre_translation;    // < Translation applied between parent and self
 	ufbx_quat adjust_pre_rotation;       // < Rotation applied between parent and self
 	ufbx_real adjust_pre_scale;          // < Scaling applied between parent and self
 	ufbx_quat adjust_post_rotation;      // < Rotation applied in local space at the end
 	ufbx_real adjust_post_scale;         // < Scaling applied in local space at the end
 	ufbx_real adjust_translation_scale;  // < Scaling applied to translation only
 	ufbx_mirror_axis adjust_mirror_axis; // < Mirror translation and rotation on this axis
 
 	// Materials used by `mesh` or other `attrib`.
 	// There may be multiple copies of a single `ufbx_mesh` with different materials
 	// in the `ufbx_node` instances.
 	ufbx_material_list materials;
 
 	// Bind pose
 	ufbx_nullable ufbx_pose *bind_pose;
 
 	// Visibility state.
 	bool visible;
 
 	// True if this node is the implicit root node of the scene.
 	bool is_root;
 
 	// True if the node has a non-identity `geometry_transform`.
 	bool has_geometry_transform;
 
 	// If `true` the transform is adjusted by ufbx, not enabled by default.
 	// See `adjust_pre_rotation`, `adjust_pre_scale`, `adjust_post_rotation`,
 	// and `adjust_post_scale`.
 	bool has_adjust_transform;
 
 	// Scale is adjusted by root scale.
 	bool has_root_adjust_transform;
 
 	// True if this node is a synthetic geometry transform helper.
 	// See `UFBX_GEOMETRY_TRANSFORM_HANDLING_HELPER_NODES`.
 	bool is_geometry_transform_helper;
 
 	// True if the node is a synthetic scale compensation helper.
 	// See `UFBX_INHERIT_MODE_HANDLING_HELPER_NODES`.
 	bool is_scale_helper;
 
 	// Parent node to children that can compensate for parent scale.
 	bool is_scale_compensate_parent;
 
 	// How deep is this node in the parent hierarchy. Root node is at depth `0`
 	// and the immediate children of root at `1`.
 	uint32_t node_depth;
 };
 
 // Vertex attribute: All attributes are stored in a consistent indexed format
 // regardless of how it's actually stored in the file.
 //
 // `values` is a contiguous array of attribute values.
 // `indices` maps each mesh index into a value in the `values` array.
 //
 // If `unique_per_vertex` is set then the attribute is guaranteed to have a
 // single defined value per vertex accessible via:
 //   attrib.values.data[attrib.indices.data[mesh->vertex_first_index[vertex_ix]]
 typedef struct ufbx_vertex_attrib {
 	// Is this attribute defined by the mesh.
 	bool exists;
 	// List of values the attribute uses.
 	ufbx_void_list values;
 	// Indices into `values[]`, indexed up to `ufbx_mesh.num_indices`.
 	ufbx_uint32_list indices;
 	// Number of `ufbx_real` entries per value.
 	size_t value_reals;
 	// `true` if this attribute is defined per vertex, instead of per index.
 	bool unique_per_vertex;
 	// Optional 4th 'W' component for the attribute.
 	// May be defined for the following:
 	//   ufbx_mesh.vertex_normal
 	//   ufbx_mesh.vertex_tangent / ufbx_uv_set.vertex_tangent
 	//   ufbx_mesh.vertex_bitangent / ufbx_uv_set.vertex_bitangent
 	// NOTE: This is not loaded by default, set `ufbx_load_opts.retain_vertex_attrib_w`.
 	ufbx_real_list values_w;
 } ufbx_vertex_attrib;
 
 // 1D vertex attribute, see `ufbx_vertex_attrib` for information
 typedef struct ufbx_vertex_real {
 	bool exists;
 	ufbx_real_list values;
 	ufbx_uint32_list indices;
 	size_t value_reals;
 	bool unique_per_vertex;
 	ufbx_real_list values_w;
 
 	UFBX_VERTEX_ATTRIB_IMPL(ufbx_real)
 } ufbx_vertex_real;
 
 // 2D vertex attribute, see `ufbx_vertex_attrib` for information
 typedef struct ufbx_vertex_vec2 {
 	bool exists;
 	ufbx_vec2_list values;
 	ufbx_uint32_list indices;
 	size_t value_reals;
 	bool unique_per_vertex;
 	ufbx_real_list values_w;
 
 	UFBX_VERTEX_ATTRIB_IMPL(ufbx_vec2)
 } ufbx_vertex_vec2;
 
 // 3D vertex attribute, see `ufbx_vertex_attrib` for information
 typedef struct ufbx_vertex_vec3 {
 	bool exists;
 	ufbx_vec3_list values;
 	ufbx_uint32_list indices;
 	size_t value_reals;
 	bool unique_per_vertex;
 	ufbx_real_list values_w;
 
 	UFBX_VERTEX_ATTRIB_IMPL(ufbx_vec3)
 } ufbx_vertex_vec3;
 
 // 4D vertex attribute, see `ufbx_vertex_attrib` for information
 typedef struct ufbx_vertex_vec4 {
 	bool exists;
 	ufbx_vec4_list values;
 	ufbx_uint32_list indices;
 	size_t value_reals;
 	bool unique_per_vertex;
 	ufbx_real_list values_w;
 
 	UFBX_VERTEX_ATTRIB_IMPL(ufbx_vec4)
 } ufbx_vertex_vec4;
 
 // Vertex UV set/layer
 typedef struct ufbx_uv_set {
 	ufbx_string name;
 	uint32_t index;
 
 	// Vertex attributes, see `ufbx_mesh` attributes for more information
 	ufbx_vertex_vec2 vertex_uv;        // < UV / texture coordinates
 	ufbx_vertex_vec3 vertex_tangent;   // < (optional) Tangent vector in UV.x direction
 	ufbx_vertex_vec3 vertex_bitangent; // < (optional) Tangent vector in UV.y direction
 } ufbx_uv_set;
 
 // Vertex color set/layer
 typedef struct ufbx_color_set {
 	ufbx_string name;
 	uint32_t index;
 
 	// Vertex attributes, see `ufbx_mesh` attributes for more information
 	ufbx_vertex_vec4 vertex_color; // < Per-vertex RGBA color
 } ufbx_color_set;
 
 UFBX_LIST_TYPE(ufbx_uv_set_list, ufbx_uv_set);
 UFBX_LIST_TYPE(ufbx_color_set_list, ufbx_color_set);
 
 // Edge between two _indices_ in a mesh
 typedef struct ufbx_edge {
 	union {
 		struct { uint32_t a, b; };
 		uint32_t indices[2];
 	};
 } ufbx_edge;
 
 UFBX_LIST_TYPE(ufbx_edge_list, ufbx_edge);
 
 // Polygonal face with arbitrary number vertices, a single face contains a
 // contiguous range of mesh indices, eg. `{5,3}` would have indices 5, 6, 7
 //
 // NOTE: `num_indices` maybe less than 3 in which case the face is invalid!
 // [TODO #23: should probably remove the bad faces at load time]
 typedef struct ufbx_face {
 	uint32_t index_begin;
 	uint32_t num_indices;
 } ufbx_face;
 
 UFBX_LIST_TYPE(ufbx_face_list, ufbx_face);
 
 // Subset of mesh faces used by a single material or group.
 typedef struct ufbx_mesh_part {
 
 	// Index of the mesh part.
 	uint32_t index;
 
 	// Sub-set of the geometry
 	size_t num_faces;     // < Number of faces (polygons)
 	size_t num_triangles; // < Number of triangles if triangulated
 
 	size_t num_empty_faces; // < Number of faces with zero vertices
 	size_t num_point_faces; // < Number of faces with a single vertex
 	size_t num_line_faces;  // < Number of faces with two vertices
 
 	// Indices to `ufbx_mesh.faces[]`.
 	// Always contains `num_faces` elements.
 	ufbx_uint32_list face_indices;
 
 } ufbx_mesh_part;
 
 UFBX_LIST_TYPE(ufbx_mesh_part_list, ufbx_mesh_part);
 
 typedef struct ufbx_face_group {
 	int32_t id;       // < Numerical ID for this group.
 	ufbx_string name; // < Name for the face group.
 } ufbx_face_group;
 
 UFBX_LIST_TYPE(ufbx_face_group_list, ufbx_face_group);
 
 typedef struct ufbx_subdivision_weight_range {
 	uint32_t weight_begin;
 	uint32_t num_weights;
 } ufbx_subdivision_weight_range;
 
 UFBX_LIST_TYPE(ufbx_subdivision_weight_range_list, ufbx_subdivision_weight_range);
 
 typedef struct ufbx_subdivision_weight {
 	ufbx_real weight;
 	uint32_t index;
 } ufbx_subdivision_weight;
 
 UFBX_LIST_TYPE(ufbx_subdivision_weight_list, ufbx_subdivision_weight);
 
 typedef struct ufbx_subdivision_result {
 	size_t result_memory_used;
 	size_t temp_memory_used;
 	size_t result_allocs;
 	size_t temp_allocs;
 
 	// Weights of vertices in the source model.
 	// Defined if `ufbx_subdivide_opts.evaluate_source_vertices` is set.
 	ufbx_subdivision_weight_range_list source_vertex_ranges;
 	ufbx_subdivision_weight_list source_vertex_weights;
 
 	// Weights of skin clusters in the source model.
 	// Defined if `ufbx_subdivide_opts.evaluate_skin_weights` is set.
 	ufbx_subdivision_weight_range_list skin_cluster_ranges;
 	ufbx_subdivision_weight_list skin_cluster_weights;
 
 } ufbx_subdivision_result;
 
 typedef enum ufbx_subdivision_display_mode UFBX_ENUM_REPR {
 	UFBX_SUBDIVISION_DISPLAY_DISABLED,
 	UFBX_SUBDIVISION_DISPLAY_HULL,
 	UFBX_SUBDIVISION_DISPLAY_HULL_AND_SMOOTH,
 	UFBX_SUBDIVISION_DISPLAY_SMOOTH,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_SUBDIVISION_DISPLAY_MODE)
 } ufbx_subdivision_display_mode;
 
 UFBX_ENUM_TYPE(ufbx_subdivision_display_mode, UFBX_SUBDIVISION_DISPLAY_MODE, UFBX_SUBDIVISION_DISPLAY_SMOOTH);
 
 typedef enum ufbx_subdivision_boundary UFBX_ENUM_REPR {
 	UFBX_SUBDIVISION_BOUNDARY_DEFAULT,
 	UFBX_SUBDIVISION_BOUNDARY_LEGACY,
 	// OpenSubdiv: `VTX_BOUNDARY_EDGE_AND_CORNER` / `FVAR_LINEAR_CORNERS_ONLY`
 	UFBX_SUBDIVISION_BOUNDARY_SHARP_CORNERS,
 	// OpenSubdiv: `VTX_BOUNDARY_EDGE_ONLY` / `FVAR_LINEAR_NONE`
 	UFBX_SUBDIVISION_BOUNDARY_SHARP_NONE,
 	// OpenSubdiv: `FVAR_LINEAR_BOUNDARIES`
 	UFBX_SUBDIVISION_BOUNDARY_SHARP_BOUNDARY,
 	// OpenSubdiv: `FVAR_LINEAR_ALL`
 	UFBX_SUBDIVISION_BOUNDARY_SHARP_INTERIOR,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_SUBDIVISION_BOUNDARY)
 } ufbx_subdivision_boundary;
 
 UFBX_ENUM_TYPE(ufbx_subdivision_boundary, UFBX_SUBDIVISION_BOUNDARY, UFBX_SUBDIVISION_BOUNDARY_SHARP_INTERIOR);
 
 // Polygonal mesh geometry.
 //
 // Example mesh with two triangles (x, z) and a quad (y).
 // The faces have a constant UV coordinate x/y/z.
 // The vertices have _per vertex_ normals that point up/down.
 //
 //     ^   ^     ^
 //     A---B-----C
 //     |x /     /|
 //     | /  y  / |
 //     |/     / z|
 //     D-----E---F
 //     v     v   v
 //
 // Attributes may have multiple values within a single vertex, for example a
 // UV seam vertex has two UV coordinates. Thus polygons are defined using
 // an index that counts each corner of each face polygon. If an attribute is
 // defined (even per-vertex) it will always have a valid `indices` array.
 //
 //   {0,3}    {3,4}    {7,3}   faces ({ index_begin, num_indices })
 //   0 1 2   3 4 5 6   7 8 9   index
 //
 //   0 1 3   1 2 4 3   2 4 5   vertex_indices[index]
 //   A B D   B C E D   C E F   vertices[vertex_indices[index]]
 //
 //   0 0 1   0 0 1 1   0 1 1   vertex_normal.indices[index]
 //   ^ ^ v   ^ ^ v v   ^ v v   vertex_normal.data[vertex_normal.indices[index]]
 //
 //   0 0 0   1 1 1 1   2 2 2   vertex_uv.indices[index]
 //   x x x   y y y y   z z z   vertex_uv.data[vertex_uv.indices[index]]
 //
 // Vertex position can also be accessed uniformly through an accessor:
 //   0 1 3   1 2 4 3   2 4 5   vertex_position.indices[index]
 //   A B D   B C E D   C E F   vertex_position.data[vertex_position.indices[index]]
 //
 // Some geometry data is specified per logical vertex. Vertex positions are
 // the only attribute that is guaranteed to be defined _uniquely_ per vertex.
 // Vertex attributes _may_ be defined per vertex if `unique_per_vertex == true`.
 // You can access the per-vertex values by first finding the first index that
 // refers to the given vertex.
 //
 //   0 1 2 3 4 5  vertex
 //   A B C D E F  vertices[vertex]
 //
 //   0 1 4 2 5 9  vertex_first_index[vertex]
 //   0 0 0 1 1 1  vertex_normal.indices[vertex_first_index[vertex]]
 //   ^ ^ ^ v v v  vertex_normal.data[vertex_normal.indices[vertex_first_index[vertex]]]
 //
 struct ufbx_mesh {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// Number of "logical" vertices that would be treated as a single point,
 	// one vertex may be split to multiple indices for split attributes, eg. UVs
 	size_t num_vertices;  // < Number of logical "vertex" points
 	size_t num_indices;   // < Number of combiend vertex/attribute tuples
 	size_t num_faces;     // < Number of faces (polygons) in the mesh
 	size_t num_triangles; // < Number of triangles if triangulated
 
 	// Number of edges in the mesh.
 	// NOTE: May be zero in valid meshes if the file doesn't contain edge adjacency data!
 	size_t num_edges;
 
 	size_t max_face_triangles; // < Maximum number of triangles in a  face in this mesh
 
 	size_t num_empty_faces; // < Number of faces with zero vertices
 	size_t num_point_faces; // < Number of faces with a single vertex
 	size_t num_line_faces;  // < Number of faces with two vertices
 
 	// Faces and optional per-face extra data
 	ufbx_face_list faces;           // < Face index range
 	ufbx_bool_list face_smoothing;  // < Should the face have soft normals
 	ufbx_uint32_list face_material; // < Indices to `ufbx_mesh.materials[]` and `ufbx_node.materials[]`
 	ufbx_uint32_list face_group;    // < Face polygon group index, indices to `ufbx_mesh.face_groups[]`
 	ufbx_bool_list face_hole;       // < Should the face be hidden as a "hole"
 
 	// Edges and optional per-edge extra data
 	ufbx_edge_list edges;           // < Edge index range
 	ufbx_bool_list edge_smoothing;  // < Should the edge have soft normals
 	ufbx_real_list edge_crease;     // < Crease value for subdivision surfaces
 	ufbx_bool_list edge_visibility; // < Should the edge be visible
 
 	// Logical vertices and positions, alternatively you can use
 	// `vertex_position` for consistent interface with other attributes.
 	ufbx_uint32_list vertex_indices;
 	ufbx_vec3_list vertices;
 
 	// First index referring to a given vertex, `UFBX_NO_INDEX` if the vertex is unused.
 	ufbx_uint32_list vertex_first_index;
 
 	// Vertex attributes, see the comment over the struct.
 	//
 	// NOTE: Not all meshes have all attributes, in that case `indices/data == NULL`!
 	//
 	// NOTE: UV/tangent/bitangent and color are the from first sets,
 	// use `uv_sets/color_sets` to access the other layers.
 	ufbx_vertex_vec3 vertex_position;  // < Vertex positions
 	ufbx_vertex_vec3 vertex_normal;    // < (optional) Normal vectors, always defined if `ufbx_load_opts.generate_missing_normals`
 	ufbx_vertex_vec2 vertex_uv;        // < (optional) UV / texture coordinates
 	ufbx_vertex_vec3 vertex_tangent;   // < (optional) Tangent vector in UV.x direction
 	ufbx_vertex_vec3 vertex_bitangent; // < (optional) Tangent vector in UV.y direction
 	ufbx_vertex_vec4 vertex_color;     // < (optional) Per-vertex RGBA color
 	ufbx_vertex_real vertex_crease;    // < (optional) Crease value for subdivision surfaces
 
 	// Multiple named UV/color sets
 	// NOTE: The first set contains the same data as `vertex_uv/color`!
 	ufbx_uv_set_list uv_sets;
 	ufbx_color_set_list color_sets;
 
 	// Materials used by the mesh.
 	// NOTE: These can be wrong if you want to support per-instance materials!
 	// Use `ufbx_node.materials[]` to get the per-instance materials at the same indices.
 	ufbx_material_list materials;
 
 	// Face groups for this mesh.
 	ufbx_face_group_list face_groups;
 
 	// Segments that use a given material.
 	// Defined even if the mesh doesn't have any materials.
 	ufbx_mesh_part_list material_parts;
 
 	// Segments for each face group.
 	ufbx_mesh_part_list face_group_parts;
 
 	// Order of `material_parts` by first face that refers to it.
 	// Useful for compatibility with FBX SDK and various importers using it,
 	// as they use this material order by default.
 	ufbx_uint32_list material_part_usage_order;
 
 	// Skinned vertex positions, for efficiency the skinned positions are the
 	// same as the static ones for non-skinned meshes and `skinned_is_local`
 	// is set to true meaning you need to transform them manually using
 	// `ufbx_transform_position(&node->geometry_to_world, skinned_pos)`!
 	bool skinned_is_local;
 	ufbx_vertex_vec3 skinned_position;
 	ufbx_vertex_vec3 skinned_normal;
 
 	// Deformers
 	ufbx_skin_deformer_list skin_deformers;
 	ufbx_blend_deformer_list blend_deformers;
 	ufbx_cache_deformer_list cache_deformers;
 	ufbx_element_list all_deformers;
 
 	// Subdivision
 	uint32_t subdivision_preview_levels;
 	uint32_t subdivision_render_levels;
 	ufbx_subdivision_display_mode subdivision_display_mode;
 	ufbx_subdivision_boundary subdivision_boundary;
 	ufbx_subdivision_boundary subdivision_uv_boundary;
 
 	// The winding of the faces has been reversed.
 	bool reversed_winding;
 
 	// Normals have been generated instead of evaluated.
 	// Either from missing normals (via `ufbx_load_opts.generate_missing_normals`), skinning,
 	// tessellation, or subdivision.
 	bool generated_normals;
 
 	// Subdivision (result)
 	bool subdivision_evaluated;
 	ufbx_nullable ufbx_subdivision_result *subdivision_result;
 
 	// Tessellation (result)
 	bool from_tessellated_nurbs;
 };
 
 // The kind of light source
 typedef enum ufbx_light_type UFBX_ENUM_REPR {
 	// Single point at local origin, at `node->world_transform.position`
 	UFBX_LIGHT_POINT,
 	// Infinite directional light pointing locally towards `light->local_direction`
 	// For global: `ufbx_transform_direction(&node->node_to_world, light->local_direction)`
 	UFBX_LIGHT_DIRECTIONAL,
 	// Cone shaped light towards `light->local_direction`, between `light->inner/outer_angle`.
 	// For global: `ufbx_transform_direction(&node->node_to_world, light->local_direction)`
 	UFBX_LIGHT_SPOT,
 	// Area light, shape specified by `light->area_shape`
 	// TODO: Units?
 	UFBX_LIGHT_AREA,
 	// Volumetric light source
 	// TODO: How does this work
 	UFBX_LIGHT_VOLUME,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_LIGHT_TYPE)
 } ufbx_light_type;
 
 UFBX_ENUM_TYPE(ufbx_light_type, UFBX_LIGHT_TYPE, UFBX_LIGHT_VOLUME);
 
 // How fast does the light intensity decay at a distance
 typedef enum ufbx_light_decay UFBX_ENUM_REPR {
 	UFBX_LIGHT_DECAY_NONE,      // < 1 (no decay)
 	UFBX_LIGHT_DECAY_LINEAR,    // < 1 / d
 	UFBX_LIGHT_DECAY_QUADRATIC, // < 1 / d^2 (physically accurate)
 	UFBX_LIGHT_DECAY_CUBIC,     // < 1 / d^3
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_LIGHT_DECAY)
 } ufbx_light_decay;
 
 UFBX_ENUM_TYPE(ufbx_light_decay, UFBX_LIGHT_DECAY, UFBX_LIGHT_DECAY_CUBIC);
 
 typedef enum ufbx_light_area_shape UFBX_ENUM_REPR {
 	UFBX_LIGHT_AREA_SHAPE_RECTANGLE,
 	UFBX_LIGHT_AREA_SHAPE_SPHERE,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_LIGHT_AREA_SHAPE)
 } ufbx_light_area_shape;
 
 UFBX_ENUM_TYPE(ufbx_light_area_shape, UFBX_LIGHT_AREA_SHAPE, UFBX_LIGHT_AREA_SHAPE_SPHERE);
 
 // Light source attached to a `ufbx_node`
 struct ufbx_light {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// Color and intensity of the light, usually you want to use `color * intensity`
 	// NOTE: `intensity` is 0.01x of the property `"Intensity"` as that matches
 	// matches values in DCC programs before exporting.
 	ufbx_vec3 color;
 	ufbx_real intensity;
 
 	// Direction the light is aimed at in node's local space, usually -Y
 	ufbx_vec3 local_direction;
 
 	// Type of the light and shape parameters
 	ufbx_light_type type;
 	ufbx_light_decay decay;
 	ufbx_light_area_shape area_shape;
 	ufbx_real inner_angle;
 	ufbx_real outer_angle;
 
 	bool cast_light;
 	bool cast_shadows;
 };
 
 typedef enum ufbx_projection_mode UFBX_ENUM_REPR {
 	// Perspective projection.
 	UFBX_PROJECTION_MODE_PERSPECTIVE,
 
 	// Orthographic projection.
 	UFBX_PROJECTION_MODE_ORTHOGRAPHIC,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_PROJECTION_MODE)
 } ufbx_projection_mode;
 
 UFBX_ENUM_TYPE(ufbx_projection_mode, UFBX_PROJECTION_MODE, UFBX_PROJECTION_MODE_ORTHOGRAPHIC);
 
 // Method of specifying the rendering resolution from properties
 // NOTE: Handled internally by ufbx, ignore unless you interpret `ufbx_props` directly!
 typedef enum ufbx_aspect_mode UFBX_ENUM_REPR {
 	// No defined resolution
 	UFBX_ASPECT_MODE_WINDOW_SIZE,
 	// `"AspectWidth"` and `"AspectHeight"` are relative to each other
 	UFBX_ASPECT_MODE_FIXED_RATIO,
 	// `"AspectWidth"` and `"AspectHeight"` are both pixels
 	UFBX_ASPECT_MODE_FIXED_RESOLUTION,
 	// `"AspectWidth"` is pixels, `"AspectHeight"` is relative to width
 	UFBX_ASPECT_MODE_FIXED_WIDTH,
 	// < `"AspectHeight"` is pixels, `"AspectWidth"` is relative to height
 	UFBX_ASPECT_MODE_FIXED_HEIGHT,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_ASPECT_MODE)
 } ufbx_aspect_mode;
 
 UFBX_ENUM_TYPE(ufbx_aspect_mode, UFBX_ASPECT_MODE, UFBX_ASPECT_MODE_FIXED_HEIGHT);
 
 // Method of specifying the field of view from properties
 // NOTE: Handled internally by ufbx, ignore unless you interpret `ufbx_props` directly!
 typedef enum ufbx_aperture_mode UFBX_ENUM_REPR {
 	// Use separate `"FieldOfViewX"` and `"FieldOfViewY"` as horizontal/vertical FOV angles
 	UFBX_APERTURE_MODE_HORIZONTAL_AND_VERTICAL,
 	// Use `"FieldOfView"` as horizontal FOV angle, derive vertical angle via aspect ratio
 	UFBX_APERTURE_MODE_HORIZONTAL,
 	// Use `"FieldOfView"` as vertical FOV angle, derive horizontal angle via aspect ratio
 	UFBX_APERTURE_MODE_VERTICAL,
 	// Compute the field of view from the render gate size and focal length
 	UFBX_APERTURE_MODE_FOCAL_LENGTH,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_APERTURE_MODE)
 } ufbx_aperture_mode;
 
 UFBX_ENUM_TYPE(ufbx_aperture_mode, UFBX_APERTURE_MODE, UFBX_APERTURE_MODE_FOCAL_LENGTH);
 
 // Method of specifying the render gate size from properties
 // NOTE: Handled internally by ufbx, ignore unless you interpret `ufbx_props` directly!
 typedef enum ufbx_gate_fit UFBX_ENUM_REPR {
 	// Use the film/aperture size directly as the render gate
 	UFBX_GATE_FIT_NONE,
 	// Fit the render gate to the height of the film, derive width from aspect ratio
 	UFBX_GATE_FIT_VERTICAL,
 	// Fit the render gate to the width of the film, derive height from aspect ratio
 	UFBX_GATE_FIT_HORIZONTAL,
 	// Fit the render gate so that it is fully contained within the film gate
 	UFBX_GATE_FIT_FILL,
 	// Fit the render gate so that it fully contains the film gate
 	UFBX_GATE_FIT_OVERSCAN,
 	// Stretch the render gate to match the film gate
 	// TODO: Does this differ from `UFBX_GATE_FIT_NONE`?
 	UFBX_GATE_FIT_STRETCH,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_GATE_FIT)
 } ufbx_gate_fit;
 
 UFBX_ENUM_TYPE(ufbx_gate_fit, UFBX_GATE_FIT, UFBX_GATE_FIT_STRETCH);
 
 // Camera film/aperture size defaults
 // NOTE: Handled internally by ufbx, ignore unless you interpret `ufbx_props` directly!
 typedef enum ufbx_aperture_format UFBX_ENUM_REPR {
 	UFBX_APERTURE_FORMAT_CUSTOM,              // < Use `"FilmWidth"` and `"FilmHeight"`
 	UFBX_APERTURE_FORMAT_16MM_THEATRICAL,     // < 0.404 x 0.295 inches
 	UFBX_APERTURE_FORMAT_SUPER_16MM,          // < 0.493 x 0.292 inches
 	UFBX_APERTURE_FORMAT_35MM_ACADEMY,        // < 0.864 x 0.630 inches
 	UFBX_APERTURE_FORMAT_35MM_TV_PROJECTION,  // < 0.816 x 0.612 inches
 	UFBX_APERTURE_FORMAT_35MM_FULL_APERTURE,  // < 0.980 x 0.735 inches
 	UFBX_APERTURE_FORMAT_35MM_185_PROJECTION, // < 0.825 x 0.446 inches
 	UFBX_APERTURE_FORMAT_35MM_ANAMORPHIC,     // < 0.864 x 0.732 inches (squeeze ratio: 2)
 	UFBX_APERTURE_FORMAT_70MM_PROJECTION,     // < 2.066 x 0.906 inches
 	UFBX_APERTURE_FORMAT_VISTAVISION,         // < 1.485 x 0.991 inches
 	UFBX_APERTURE_FORMAT_DYNAVISION,          // < 2.080 x 1.480 inches
 	UFBX_APERTURE_FORMAT_IMAX,                // < 2.772 x 2.072 inches
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_APERTURE_FORMAT)
 } ufbx_aperture_format;
 
 UFBX_ENUM_TYPE(ufbx_aperture_format, UFBX_APERTURE_FORMAT, UFBX_APERTURE_FORMAT_IMAX);
 
 typedef enum ufbx_coordinate_axis UFBX_ENUM_REPR {
 	UFBX_COORDINATE_AXIS_POSITIVE_X,
 	UFBX_COORDINATE_AXIS_NEGATIVE_X,
 	UFBX_COORDINATE_AXIS_POSITIVE_Y,
 	UFBX_COORDINATE_AXIS_NEGATIVE_Y,
 	UFBX_COORDINATE_AXIS_POSITIVE_Z,
 	UFBX_COORDINATE_AXIS_NEGATIVE_Z,
 	UFBX_COORDINATE_AXIS_UNKNOWN,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_COORDINATE_AXIS)
 } ufbx_coordinate_axis;
 
 UFBX_ENUM_TYPE(ufbx_coordinate_axis, UFBX_COORDINATE_AXIS, UFBX_COORDINATE_AXIS_UNKNOWN);
 
 // Coordinate axes the scene is represented in.
 // NOTE: `front` is the _opposite_ from forward!
 typedef struct ufbx_coordinate_axes {
 	ufbx_coordinate_axis right;
 	ufbx_coordinate_axis up;
 	ufbx_coordinate_axis front;
 } ufbx_coordinate_axes;
 
 // Camera attached to a `ufbx_node`
 struct ufbx_camera {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// Projection mode (perspective/orthographic).
 	ufbx_projection_mode projection_mode;
 
 	// If set to `true`, `resolution` represents actual pixel values, otherwise
 	// it's only useful for its aspect ratio.
 	bool resolution_is_pixels;
 
 	// Render resolution, either in pixels or arbitrary units, depending on above
 	ufbx_vec2 resolution;
 
 	// Horizontal/vertical field of view in degrees
 	// Valid if `projection_mode == UFBX_PROJECTION_MODE_PERSPECTIVE`.
 	ufbx_vec2 field_of_view_deg;
 
 	// Component-wise `tan(field_of_view_deg)`, also represents the size of the
 	// proection frustum slice at distance of 1.
 	// Valid if `projection_mode == UFBX_PROJECTION_MODE_PERSPECTIVE`.
 	ufbx_vec2 field_of_view_tan;
 
 	// Orthographic camera extents.
 	// Valid if `projection_mode == UFBX_PROJECTION_MODE_ORTHOGRAPHIC`.
 	ufbx_real orthographic_extent;
 
 	// Orthographic camera size.
 	// Valid if `projection_mode == UFBX_PROJECTION_MODE_ORTHOGRAPHIC`.
 	ufbx_vec2 orthographic_size;
 
 	// Size of the projection plane at distance 1.
 	// Equal to `field_of_view_tan` if perspective, `orthographic_size` if orthographic.
 	ufbx_vec2 projection_plane;
 
 	// Aspect ratio of the camera.
 	ufbx_real aspect_ratio;
 
 	// Near plane of the frustum in units from the camera.
 	ufbx_real near_plane;
 
 	// Far plane of the frustum in units from the camera.
 	ufbx_real far_plane;
 
 	// Coordinate system that the projection uses.
 	// FBX saves cameras with +X forward and +Y up, but you can override this using
 	// `ufbx_load_opts.target_camera_axes` and it will be reflected here.
 	ufbx_coordinate_axes projection_axes;
 
 	// Advanced properties used to compute the above
 	ufbx_aspect_mode aspect_mode;
 	ufbx_aperture_mode aperture_mode;
 	ufbx_gate_fit gate_fit;
 	ufbx_aperture_format aperture_format;
 	ufbx_real focal_length_mm;     // < Focal length in millimeters
 	ufbx_vec2 film_size_inch;      // < Film size in inches
 	ufbx_vec2 aperture_size_inch;  // < Aperture/film gate size in inches
 	ufbx_real squeeze_ratio;       // < Anamoprhic stretch ratio
 };
 
 // Bone attached to a `ufbx_node`, provides the logical length of the bone
 // but most interesting information is directly in `ufbx_node`.
 struct ufbx_bone {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// Visual radius of the bone
 	ufbx_real radius;
 
 	// Length of the bone relative to the distance between two nodes
 	ufbx_real relative_length;
 
 	// Is the bone a root bone
 	bool is_root;
 };
 
 // Empty/NULL/locator connected to a node, actual details in `ufbx_node`
 struct ufbx_empty {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 };
 
 // -- Node attributes (curves/surfaces)
 
 // Segment of a `ufbx_line_curve`, indices refer to `ufbx_line_curve.point_indices[]`
 typedef struct ufbx_line_segment {
 	uint32_t index_begin;
 	uint32_t num_indices;
 } ufbx_line_segment;
 
 UFBX_LIST_TYPE(ufbx_line_segment_list, ufbx_line_segment);
 
 struct ufbx_line_curve {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	ufbx_vec3 color;
 
 	ufbx_vec3_list control_points; // < List of possible values the line passes through
 	ufbx_uint32_list point_indices; // < Indices to `control_points[]` the line goes through
 
 	ufbx_line_segment_list segments;
 
 	// Tessellation (result)
 	bool from_tessellated_nurbs;
 };
 
 typedef enum ufbx_nurbs_topology UFBX_ENUM_REPR {
 	// The endpoints are not connected.
 	UFBX_NURBS_TOPOLOGY_OPEN,
 	// Repeats first `ufbx_nurbs_basis.order - 1` control points after the end.
 	UFBX_NURBS_TOPOLOGY_PERIODIC,
 	// Repeats the first control point after the end.
 	UFBX_NURBS_TOPOLOGY_CLOSED,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_NURBS_TOPOLOGY)
 } ufbx_nurbs_topology;
 
 UFBX_ENUM_TYPE(ufbx_nurbs_topology, UFBX_NURBS_TOPOLOGY, UFBX_NURBS_TOPOLOGY_CLOSED);
 
 // NURBS basis functions for an axis
 typedef struct ufbx_nurbs_basis {
 
 	// Number of control points influencing a point on the curve/surface.
 	// Equal to the degree plus one.
 	uint32_t order;
 
 	// Topology (periodicity) of the dimension.
 	ufbx_nurbs_topology topology;
 
 	// Subdivision of the parameter range to control points.
 	ufbx_real_list knot_vector;
 
 	// Range for the parameter value.
 	ufbx_real t_min;
 	ufbx_real t_max;
 
 	// Parameter values of control points.
 	ufbx_real_list spans;
 
 	// `true` if this axis is two-dimensional.
 	bool is_2d;
 
 	// Number of control points that need to be copied to the end.
 	// This is just for convenience as it could be derived from `topology` and
 	// `order`. If for example `num_wrap_control_points == 3` you should repeat
 	// the first 3 control points after the end.
 	// HINT: You don't need to worry about this if you use ufbx functions
 	// like `ufbx_evaluate_nurbs_curve()` as they handle this internally.
 	size_t num_wrap_control_points;
 
 	// `true` if the parametrization is well defined.
 	bool valid;
 
 } ufbx_nurbs_basis;
 
 struct ufbx_nurbs_curve {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// Basis in the U axis
 	ufbx_nurbs_basis basis;
 
 	// Linear array of control points
 	// NOTE: The control points are _not_ homogeneous, meaning you have to multiply
 	// them by `w` before evaluating the surface.
 	ufbx_vec4_list control_points;
 };
 
 struct ufbx_nurbs_surface {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// Basis in the U/V axes
 	ufbx_nurbs_basis basis_u;
 	ufbx_nurbs_basis basis_v;
 
 	// Number of control points for the U/V axes
 	size_t num_control_points_u;
 	size_t num_control_points_v;
 
 	// 2D array of control points.
 	// Memory layout: `V * num_control_points_u + U`
 	// NOTE: The control points are _not_ homogeneous, meaning you have to multiply
 	// them by `w` before evaluating the surface.
 	ufbx_vec4_list control_points;
 
 	// How many segments tessellate each span in `ufbx_nurbs_basis.spans`.
 	uint32_t span_subdivision_u;
 	uint32_t span_subdivision_v;
 
 	// If `true` the resulting normals should be flipped when evaluated.
 	bool flip_normals;
 
 	// Material for the whole surface.
 	// NOTE: May be `NULL`!
 	ufbx_nullable ufbx_material *material;
 };
 
 struct ufbx_nurbs_trim_surface {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 };
 
 struct ufbx_nurbs_trim_boundary {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 };
 
 // -- Node attributes (advanced)
 
 struct ufbx_procedural_geometry {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 };
 
 struct ufbx_stereo_camera {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	ufbx_nullable ufbx_camera *left;
 	ufbx_nullable ufbx_camera *right;
 };
 
 struct ufbx_camera_switcher {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 };
 
 typedef enum ufbx_marker_type UFBX_ENUM_REPR {
 	UFBX_MARKER_UNKNOWN,     // < Unknown marker type
 	UFBX_MARKER_FK_EFFECTOR, // < FK (Forward Kinematics) effector
 	UFBX_MARKER_IK_EFFECTOR, // < IK (Inverse Kinematics) effector
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_MARKER_TYPE)
 } ufbx_marker_type;
 
 UFBX_ENUM_TYPE(ufbx_marker_type, UFBX_MARKER_TYPE, UFBX_MARKER_IK_EFFECTOR);
 
 // Tracking marker for effectors
 struct ufbx_marker {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// Type of the marker
 	ufbx_marker_type type;
 };
 
 // LOD level display mode.
 typedef enum ufbx_lod_display UFBX_ENUM_REPR {
 	UFBX_LOD_DISPLAY_USE_LOD, // < Display the LOD level if the distance is appropriate.
 	UFBX_LOD_DISPLAY_SHOW,    // < Always display the LOD level.
 	UFBX_LOD_DISPLAY_HIDE,    // < Never display the LOD level.
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_LOD_DISPLAY)
 } ufbx_lod_display;
 
 UFBX_ENUM_TYPE(ufbx_lod_display, UFBX_LOD_DISPLAY, UFBX_LOD_DISPLAY_HIDE);
 
 // Single LOD level within an LOD group.
 // Specifies properties of the Nth child of the _node_ containing the LOD group.
 typedef struct ufbx_lod_level {
 
 	// Minimum distance to show this LOD level.
 	// NOTE: In world units by default, or in screen percentage if
 	// `ufbx_lod_group.relative_distances` is set.
 	ufbx_real distance;
 
 	// LOD display mode.
 	// NOTE: Mostly for editing, you should probably ignore this
 	// unless making a modeling program.
 	ufbx_lod_display display;
 
 } ufbx_lod_level;
 
 UFBX_LIST_TYPE(ufbx_lod_level_list, ufbx_lod_level);
 
 // Group of LOD (Level of Detail) levels for an object.
 // The actual LOD models are defined in the parent `ufbx_node.children`.
 struct ufbx_lod_group {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 		ufbx_node_list instances;
 	}; };
 
 	// If set to `true`, `ufbx_lod_level.distance` represents a screen size percentage.
 	bool relative_distances;
 
 	// LOD levels matching in order to `ufbx_node.children`.
 	ufbx_lod_level_list lod_levels;
 
 	// If set to `true` don't account for parent transform when computing the distance.
 	bool ignore_parent_transform;
 
 	// If `use_distance_limit` is enabled hide the group if the distance is not between
 	// `distance_limit_min` and `distance_limit_max`.
 	bool use_distance_limit;
 	ufbx_real distance_limit_min;
 	ufbx_real distance_limit_max;
 };
 
 // -- Deformers
 
 // Method to evaluate the skinning on a per-vertex level
 typedef enum ufbx_skinning_method UFBX_ENUM_REPR {
 	// Linear blend skinning: Blend transformation matrices by vertex weights
 	UFBX_SKINNING_METHOD_LINEAR,
 	// One vertex should have only one bone attached
 	UFBX_SKINNING_METHOD_RIGID,
 	// Convert the transformations to dual quaternions and blend in that space
 	UFBX_SKINNING_METHOD_DUAL_QUATERNION,
 	// Blend between `UFBX_SKINNING_METHOD_LINEAR` and `UFBX_SKINNING_METHOD_BLENDED_DQ_LINEAR`
 	// The blend weight can be found either per-vertex in `ufbx_skin_vertex.dq_weight`
 	// or in `ufbx_skin_deformer.dq_vertices/dq_weights` (indexed by vertex).
 	UFBX_SKINNING_METHOD_BLENDED_DQ_LINEAR,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_SKINNING_METHOD)
 } ufbx_skinning_method;
 
 UFBX_ENUM_TYPE(ufbx_skinning_method, UFBX_SKINNING_METHOD, UFBX_SKINNING_METHOD_BLENDED_DQ_LINEAR);
 
 // Skin weight information for a single mesh vertex
 typedef struct ufbx_skin_vertex {
 
 	// Each vertex is influenced by weights from `ufbx_skin_deformer.weights[]`
 	// The weights are sorted by decreasing weight so you can take the first N
 	// weights to get a cheaper approximation of the vertex.
 	// NOTE: The weights are not guaranteed to be normalized!
 	uint32_t weight_begin; // < Index to start from in the `weights[]` array
 	uint32_t num_weights; // < Number of weights influencing the vertex
 
 	// Blend weight between Linear Blend Skinning (0.0) and Dual Quaternion (1.0).
 	// Should be used if `skinning_method == UFBX_SKINNING_METHOD_BLENDED_DQ_LINEAR`
 	ufbx_real dq_weight;
 
 } ufbx_skin_vertex;
 
 UFBX_LIST_TYPE(ufbx_skin_vertex_list, ufbx_skin_vertex);
 
 // Single per-vertex per-cluster weight, see `ufbx_skin_vertex`
 typedef struct ufbx_skin_weight {
 	uint32_t cluster_index; // < Index into `ufbx_skin_deformer.clusters[]`
 	ufbx_real weight;       // < Amount this bone influence the vertex
 } ufbx_skin_weight;
 
 UFBX_LIST_TYPE(ufbx_skin_weight_list, ufbx_skin_weight);
 
 // Skin deformer specifies a binding between a logical set of bones (a skeleton)
 // and a mesh. Each bone is represented by a `ufbx_skin_cluster` that contains
 // the binding matrix and a `ufbx_node *bone` that has the current transformation.
 struct ufbx_skin_deformer {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	ufbx_skinning_method skinning_method;
 
 	// Clusters (bones) in the skin
 	ufbx_skin_cluster_list clusters;
 
 	// Per-vertex weight information
 	ufbx_skin_vertex_list vertices;
 	ufbx_skin_weight_list weights;
 
 	// Largest amount of weights a single vertex can have
 	size_t max_weights_per_vertex;
 
 	// Blend weights between Linear Blend Skinning (0.0) and Dual Quaternion (1.0).
 	// HINT: You probably want to use `vertices` and `ufbx_skin_vertex.dq_weight` instead!
 	// NOTE: These may be out-of-bounds for a given mesh, `vertices` is always safe.
 	size_t num_dq_weights;
 	ufbx_uint32_list dq_vertices;
 	ufbx_real_list dq_weights;
 };
 
 // Cluster of vertices bound to a single bone.
 struct ufbx_skin_cluster {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// The bone node the cluster is attached to
 	// NOTE: Always valid if found from `ufbx_skin_deformer.clusters[]` unless
 	// `ufbx_load_opts.connect_broken_elements` is `true`.
 	ufbx_nullable ufbx_node *bone_node;
 
 	// Binding matrix from local mesh vertices to the bone
 	ufbx_matrix geometry_to_bone;
 
 	// Binding matrix from local mesh _node_ to the bone.
 	// NOTE: Prefer `geometry_to_bone` in most use cases!
 	ufbx_matrix mesh_node_to_bone;
 
 	// Matrix that specifies the rest/bind pose transform of the node,
 	// not generally needed for skinning, use `geometry_to_bone` instead.
 	ufbx_matrix bind_to_world;
 
 	// Precomputed matrix/transform that accounts for the current bone transform
 	// ie. `ufbx_matrix_mul(&cluster->bone->node_to_world, &cluster->geometry_to_bone)`
 	ufbx_matrix geometry_to_world;
 	ufbx_transform geometry_to_world_transform;
 
 	// Raw weights indexed by each _vertex_ of a mesh (not index!)
 	// HINT: It may be simpler to use `ufbx_skin_deformer.vertices[]/weights[]` instead!
 	// NOTE: These may be out-of-bounds for a given mesh, `ufbx_skin_deformer.vertices` is always safe.
 	size_t num_weights;       // < Number of vertices in the cluster
 	ufbx_uint32_list vertices; // < Vertex indices in `ufbx_mesh.vertices[]`
 	ufbx_real_list weights;   // < Per-vertex weight values
 };
 
 // Blend shape deformer can contain multiple channels (think of sliders between morphs)
 // that may optionally have in-between keyframes.
 struct ufbx_blend_deformer {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Independent morph targets of the deformer.
 	ufbx_blend_channel_list channels;
 };
 
 // Blend shape associated with a target weight in a series of morphs
 typedef struct ufbx_blend_keyframe {
 	// The target blend shape offsets.
 	ufbx_blend_shape *shape;
 
 	// Weight value at which to apply the keyframe at full strength
 	ufbx_real target_weight;
 
 	// The weight the shape should be currently applied with
 	ufbx_real effective_weight;
 } ufbx_blend_keyframe;
 
 UFBX_LIST_TYPE(ufbx_blend_keyframe_list, ufbx_blend_keyframe);
 
 // Blend channel consists of multiple morph-key targets that are interpolated.
 // In simple cases there will be only one keyframe that is the target shape.
 struct ufbx_blend_channel {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Current weight of the channel
 	ufbx_real weight;
 
 	// Key morph targets to blend between depending on `weight`
 	// In usual cases there's only one target per channel
 	ufbx_blend_keyframe_list keyframes;
 
 	// Final blend shape ignoring any intermediate blend shapes.
 	ufbx_nullable ufbx_blend_shape *target_shape;
 };
 
 // Blend shape target containing the actual vertex offsets
 struct ufbx_blend_shape {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Vertex offsets to apply over the base mesh
 	// NOTE: The `offset_vertices` may be out-of-bounds for a given mesh!
 	size_t num_offsets;               // < Number of vertex offsets in the following arrays
 	ufbx_uint32_list offset_vertices; // < Indices to `ufbx_mesh.vertices[]`
 	ufbx_vec3_list position_offsets;  // < Always specified per-vertex offsets
 	ufbx_vec3_list normal_offsets;    // < Empty if not specified
 };
 
 typedef enum ufbx_cache_file_format UFBX_ENUM_REPR {
 	UFBX_CACHE_FILE_FORMAT_UNKNOWN, // < Unknown cache file format
 	UFBX_CACHE_FILE_FORMAT_PC2,     // < .pc2 Point cache file
 	UFBX_CACHE_FILE_FORMAT_MC,      // < .mc/.mcx Maya cache file
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_CACHE_FILE_FORMAT)
 } ufbx_cache_file_format;
 
 UFBX_ENUM_TYPE(ufbx_cache_file_format, UFBX_CACHE_FILE_FORMAT, UFBX_CACHE_FILE_FORMAT_MC);
 
 typedef enum ufbx_cache_data_format UFBX_ENUM_REPR {
 	UFBX_CACHE_DATA_FORMAT_UNKNOWN,     // < Unknown data format
 	UFBX_CACHE_DATA_FORMAT_REAL_FLOAT,  // < `float data[]`
 	UFBX_CACHE_DATA_FORMAT_VEC3_FLOAT,  // < `struct { float x, y, z; } data[]`
 	UFBX_CACHE_DATA_FORMAT_REAL_DOUBLE, // < `double data[]`
 	UFBX_CACHE_DATA_FORMAT_VEC3_DOUBLE, // < `struct { double x, y, z; } data[]`
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_CACHE_DATA_FORMAT)
 } ufbx_cache_data_format;
 
 UFBX_ENUM_TYPE(ufbx_cache_data_format, UFBX_CACHE_DATA_FORMAT, UFBX_CACHE_DATA_FORMAT_VEC3_DOUBLE);
 
 typedef enum ufbx_cache_data_encoding UFBX_ENUM_REPR {
 	UFBX_CACHE_DATA_ENCODING_UNKNOWN,       // < Unknown data encoding
 	UFBX_CACHE_DATA_ENCODING_LITTLE_ENDIAN, // < Contiguous little-endian array
 	UFBX_CACHE_DATA_ENCODING_BIG_ENDIAN,    // < Contiguous big-endian array
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_CACHE_DATA_ENCODING)
 } ufbx_cache_data_encoding;
 
 UFBX_ENUM_TYPE(ufbx_cache_data_encoding, UFBX_CACHE_DATA_ENCODING, UFBX_CACHE_DATA_ENCODING_BIG_ENDIAN);
 
 // Known interpretations of geometry cache data.
 typedef enum ufbx_cache_interpretation UFBX_ENUM_REPR {
 	// Unknown interpretation, see `ufbx_cache_channel.interpretation_name` for more information.
 	UFBX_CACHE_INTERPRETATION_UNKNOWN,
 
 	// Generic "points" interpretation, FBX SDK default. Usually fine to interpret
 	// as vertex positions if no other cache channels are specified.
 	UFBX_CACHE_INTERPRETATION_POINTS,
 
 	// Vertex positions.
 	UFBX_CACHE_INTERPRETATION_VERTEX_POSITION,
 
 	// Vertex normals.
 	UFBX_CACHE_INTERPRETATION_VERTEX_NORMAL,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_CACHE_INTERPRETATION)
 } ufbx_cache_interpretation;
 
 UFBX_ENUM_TYPE(ufbx_cache_interpretation, UFBX_CACHE_INTERPRETATION, UFBX_CACHE_INTERPRETATION_VERTEX_NORMAL);
 
 typedef struct ufbx_cache_frame {
 
 	// Name of the channel this frame belongs to.
 	ufbx_string channel;
 
 	// Time of this frame in seconds.
 	double time;
 
 	// Name of the file containing the data.
 	// The specified file may contain multiple frames, use `data_offset` etc. to
 	// read at the right position.
 	ufbx_string filename;
 
 	// Format of the wrapper file.
 	ufbx_cache_file_format file_format;
 
 	// Axis to mirror the read data by.
 	ufbx_mirror_axis mirror_axis;
 
 	// Factor to scale the geometry by.
 	ufbx_real scale_factor;
 
 	ufbx_cache_data_format data_format;     // < Format of the data in the file
 	ufbx_cache_data_encoding data_encoding; // < Binary encoding of the data
 	uint64_t data_offset;                   // < Byte offset into the file
 	uint32_t data_count;                    // < Number of data elements
 	uint32_t data_element_bytes;            // < Size of a single data element in bytes
 	uint64_t data_total_bytes;              // < Size of the whole data blob in bytes
 } ufbx_cache_frame;
 
 UFBX_LIST_TYPE(ufbx_cache_frame_list, ufbx_cache_frame);
 
 typedef struct ufbx_cache_channel {
 
 	// Name of the geometry cache channel.
 	ufbx_string name;
 
 	// What does the data in this channel represent.
 	ufbx_cache_interpretation interpretation;
 
 	// Source name for `interpretation`, especially useful if `interpretation` is
 	// `UFBX_CACHE_INTERPRETATION_UNKNOWN`.
 	ufbx_string interpretation_name;
 
 	// List of frames belonging to this channel.
 	// Sorted by time (`ufbx_cache_frame.time`).
 	ufbx_cache_frame_list frames;
 
 	// Axis to mirror the frames by.
 	ufbx_mirror_axis mirror_axis;
 
 	// Factor to scale the geometry by.
 	ufbx_real scale_factor;
 
 } ufbx_cache_channel;
 
 UFBX_LIST_TYPE(ufbx_cache_channel_list, ufbx_cache_channel);
 
 typedef struct ufbx_geometry_cache {
 	ufbx_string root_filename;
 	ufbx_cache_channel_list channels;
 	ufbx_cache_frame_list frames;
 	ufbx_string_list extra_info;
 } ufbx_geometry_cache;
 
 struct ufbx_cache_deformer {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	ufbx_string channel;
 	ufbx_nullable ufbx_cache_file *file;
 
 	// Only valid if `ufbx_load_opts.load_external_files` is set!
 	ufbx_nullable ufbx_geometry_cache *external_cache;
 	ufbx_nullable ufbx_cache_channel *external_channel;
 };
 
 struct ufbx_cache_file {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Filename relative to the currently loaded file.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_string filename;
 	// Absolute filename specified in the file.
 	ufbx_string absolute_filename;
 	// Relative filename specified in the file.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_string relative_filename;
 
 	// Filename relative to the loaded file, non-UTF-8 encoded.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_blob raw_filename;
 	// Absolute filename specified in the file, non-UTF-8 encoded.
 	ufbx_blob raw_absolute_filename;
 	// Relative filename specified in the file, non-UTF-8 encoded.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_blob raw_relative_filename;
 
 	ufbx_cache_file_format format;
 
 	// Only valid if `ufbx_load_opts.load_external_files` is set!
 	ufbx_nullable ufbx_geometry_cache *external_cache;
 };
 
 // -- Materials
 
 // Material property, either specified with a constant value or a mapped texture
 typedef struct ufbx_material_map {
 
 	// Constant value or factor for the map.
 	// May be specified simultaneously with a texture, in this case most shading models
 	// use multiplicative tinting of the texture values.
 	union {
 		ufbx_real value_real;
 		ufbx_vec2 value_vec2;
 		ufbx_vec3 value_vec3;
 		ufbx_vec4 value_vec4;
 	};
 	int64_t value_int;
 
 	// Texture if connected, otherwise `NULL`.
 	// May be valid but "disabled" (application specific) if `texture_enabled == false`.
 	ufbx_nullable ufbx_texture *texture;
 
 	// `true` if the file has specified any of the values above.
 	// NOTE: The value may be set to a non-zero default even if `has_value == false`,
 	// for example missing factors are set to `1.0` if a color is defined.
 	bool has_value;
 
 	// Controls whether shading should use `texture`.
 	// NOTE: Some shading models allow this to be `true` even if `texture == NULL`.
 	bool texture_enabled;
 
 	// Set to `true` if this feature should be disabled (specific to shader type).
 	bool feature_disabled;
 
 	// Number of components in the value from 1 to 4 if defined, 0 if not.
 	uint8_t value_components;
 
 } ufbx_material_map;
 
 // Material feature
 typedef struct ufbx_material_feature_info {
 
 	// Whether the material model uses this feature or not.
 	// NOTE: The feature can be enabled but still not used if eg. the corresponding factor is at zero!
 	bool enabled;
 
 	// Explicitly enabled/disabled by the material.
 	bool is_explicit;
 
 } ufbx_material_feature_info;
 
 // Texture attached to an FBX property
 typedef struct ufbx_material_texture {
 	ufbx_string material_prop; // < Name of the property in `ufbx_material.props`
 	ufbx_string shader_prop;   // < Shader-specific property mapping name
 
 	// Texture attached to the property.
 	ufbx_texture *texture;
 
 } ufbx_material_texture;
 
 UFBX_LIST_TYPE(ufbx_material_texture_list, ufbx_material_texture);
 
 // Shading model type
 typedef enum ufbx_shader_type UFBX_ENUM_REPR {
 	// Unknown shading model
 	UFBX_SHADER_UNKNOWN,
 	// FBX builtin diffuse material
 	UFBX_SHADER_FBX_LAMBERT,
 	// FBX builtin diffuse+specular material
 	UFBX_SHADER_FBX_PHONG,
 	// Open Shading Language standard surface
 	// https://github.com/Autodesk/standard-surface
 	UFBX_SHADER_OSL_STANDARD_SURFACE,
 	// Arnold standard surface
 	// https://docs.arnoldrenderer.com/display/A5AFMUG/Standard+Surface
 	UFBX_SHADER_ARNOLD_STANDARD_SURFACE,
 	// 3ds Max Physical Material
 	// https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/CloudHelp/cloudhelp/2022/ENU/3DSMax-Lighting-Shading/files/GUID-C1328905-7783-4917-AB86-FC3CC19E8972-htm.html
 	UFBX_SHADER_3DS_MAX_PHYSICAL_MATERIAL,
 	// 3ds Max PBR (Metal/Rough) material
 	// https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/CloudHelp/cloudhelp/2021/ENU/3DSMax-Lighting-Shading/files/GUID-A16234A5-6500-4662-8B20-A5EC9FE1B255-htm.html
 	UFBX_SHADER_3DS_MAX_PBR_METAL_ROUGH,
 	// 3ds Max PBR (Spec/Gloss) material
 	// https://knowledge.autodesk.com/support/3ds-max/learn-explore/caas/CloudHelp/cloudhelp/2021/ENU/3DSMax-Lighting-Shading/files/GUID-18087194-B2A6-43EF-9B80-8FD1736FAE52-htm.html
 	UFBX_SHADER_3DS_MAX_PBR_SPEC_GLOSS,
 	// 3ds glTF Material
 	// https://help.autodesk.com/view/3DSMAX/2023/ENU/?guid=GUID-7ABFB805-1D9F-417E-9C22-704BFDF160FA
 	UFBX_SHADER_GLTF_MATERIAL,
 	// 3ds OpenPBR Material
 	// https://help.autodesk.com/view/3DSMAX/2025/ENU/?guid=GUID-CD90329C-1E2B-4BBA-9285-3BB46253B9C2
 	UFBX_SHADER_OPENPBR_MATERIAL,
 	// Stingray ShaderFX shader graph.
 	// Contains a serialized `"ShaderGraph"` in `ufbx_props`.
 	UFBX_SHADER_SHADERFX_GRAPH,
 	// Variation of the FBX phong shader that can recover PBR properties like
 	// `metalness` or `roughness` from the FBX non-physical values.
 	// NOTE: Enable `ufbx_load_opts.use_blender_pbr_material`.
 	UFBX_SHADER_BLENDER_PHONG,
 	// Wavefront .mtl format shader (used by .obj files)
 	UFBX_SHADER_WAVEFRONT_MTL,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_SHADER_TYPE)
 } ufbx_shader_type;
 
 UFBX_ENUM_TYPE(ufbx_shader_type, UFBX_SHADER_TYPE, UFBX_SHADER_WAVEFRONT_MTL);
 
 // FBX builtin material properties, matches maps in `ufbx_material_fbx_maps`
 typedef enum ufbx_material_fbx_map UFBX_ENUM_REPR {
 	UFBX_MATERIAL_FBX_DIFFUSE_FACTOR,
 	UFBX_MATERIAL_FBX_DIFFUSE_COLOR,
 	UFBX_MATERIAL_FBX_SPECULAR_FACTOR,
 	UFBX_MATERIAL_FBX_SPECULAR_COLOR,
 	UFBX_MATERIAL_FBX_SPECULAR_EXPONENT,
 	UFBX_MATERIAL_FBX_REFLECTION_FACTOR,
 	UFBX_MATERIAL_FBX_REFLECTION_COLOR,
 	UFBX_MATERIAL_FBX_TRANSPARENCY_FACTOR,
 	UFBX_MATERIAL_FBX_TRANSPARENCY_COLOR,
 	UFBX_MATERIAL_FBX_EMISSION_FACTOR,
 	UFBX_MATERIAL_FBX_EMISSION_COLOR,
 	UFBX_MATERIAL_FBX_AMBIENT_FACTOR,
 	UFBX_MATERIAL_FBX_AMBIENT_COLOR,
 	UFBX_MATERIAL_FBX_NORMAL_MAP,
 	UFBX_MATERIAL_FBX_BUMP,
 	UFBX_MATERIAL_FBX_BUMP_FACTOR,
 	UFBX_MATERIAL_FBX_DISPLACEMENT_FACTOR,
 	UFBX_MATERIAL_FBX_DISPLACEMENT,
 	UFBX_MATERIAL_FBX_VECTOR_DISPLACEMENT_FACTOR,
 	UFBX_MATERIAL_FBX_VECTOR_DISPLACEMENT,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_MATERIAL_FBX_MAP)
 } ufbx_material_fbx_map;
 
 UFBX_ENUM_TYPE(ufbx_material_fbx_map, UFBX_MATERIAL_FBX_MAP, UFBX_MATERIAL_FBX_VECTOR_DISPLACEMENT);
 
 // Known PBR material properties, matches maps in `ufbx_material_pbr_maps`
 typedef enum ufbx_material_pbr_map UFBX_ENUM_REPR {
 	UFBX_MATERIAL_PBR_BASE_FACTOR,
 	UFBX_MATERIAL_PBR_BASE_COLOR,
 	UFBX_MATERIAL_PBR_ROUGHNESS,
 	UFBX_MATERIAL_PBR_METALNESS,
 	UFBX_MATERIAL_PBR_DIFFUSE_ROUGHNESS,
 	UFBX_MATERIAL_PBR_SPECULAR_FACTOR,
 	UFBX_MATERIAL_PBR_SPECULAR_COLOR,
 	UFBX_MATERIAL_PBR_SPECULAR_IOR,
 	UFBX_MATERIAL_PBR_SPECULAR_ANISOTROPY,
 	UFBX_MATERIAL_PBR_SPECULAR_ROTATION,
 	UFBX_MATERIAL_PBR_TRANSMISSION_FACTOR,
 	UFBX_MATERIAL_PBR_TRANSMISSION_COLOR,
 	UFBX_MATERIAL_PBR_TRANSMISSION_DEPTH,
 	UFBX_MATERIAL_PBR_TRANSMISSION_SCATTER,
 	UFBX_MATERIAL_PBR_TRANSMISSION_SCATTER_ANISOTROPY,
 	UFBX_MATERIAL_PBR_TRANSMISSION_DISPERSION,
 	UFBX_MATERIAL_PBR_TRANSMISSION_ROUGHNESS,
 	UFBX_MATERIAL_PBR_TRANSMISSION_EXTRA_ROUGHNESS,
 	UFBX_MATERIAL_PBR_TRANSMISSION_PRIORITY,
 	UFBX_MATERIAL_PBR_TRANSMISSION_ENABLE_IN_AOV,
 	UFBX_MATERIAL_PBR_SUBSURFACE_FACTOR,
 	UFBX_MATERIAL_PBR_SUBSURFACE_COLOR,
 	UFBX_MATERIAL_PBR_SUBSURFACE_RADIUS,
 	UFBX_MATERIAL_PBR_SUBSURFACE_SCALE,
 	UFBX_MATERIAL_PBR_SUBSURFACE_ANISOTROPY,
 	UFBX_MATERIAL_PBR_SUBSURFACE_TINT_COLOR,
 	UFBX_MATERIAL_PBR_SUBSURFACE_TYPE,
 	UFBX_MATERIAL_PBR_SHEEN_FACTOR,
 	UFBX_MATERIAL_PBR_SHEEN_COLOR,
 	UFBX_MATERIAL_PBR_SHEEN_ROUGHNESS,
 	UFBX_MATERIAL_PBR_COAT_FACTOR,
 	UFBX_MATERIAL_PBR_COAT_COLOR,
 	UFBX_MATERIAL_PBR_COAT_ROUGHNESS,
 	UFBX_MATERIAL_PBR_COAT_IOR,
 	UFBX_MATERIAL_PBR_COAT_ANISOTROPY,
 	UFBX_MATERIAL_PBR_COAT_ROTATION,
 	UFBX_MATERIAL_PBR_COAT_NORMAL,
 	UFBX_MATERIAL_PBR_COAT_AFFECT_BASE_COLOR,
 	UFBX_MATERIAL_PBR_COAT_AFFECT_BASE_ROUGHNESS,
 	UFBX_MATERIAL_PBR_THIN_FILM_FACTOR,
 	UFBX_MATERIAL_PBR_THIN_FILM_THICKNESS,
 	UFBX_MATERIAL_PBR_THIN_FILM_IOR,
 	UFBX_MATERIAL_PBR_EMISSION_FACTOR,
 	UFBX_MATERIAL_PBR_EMISSION_COLOR,
 	UFBX_MATERIAL_PBR_OPACITY,
 	UFBX_MATERIAL_PBR_INDIRECT_DIFFUSE,
 	UFBX_MATERIAL_PBR_INDIRECT_SPECULAR,
 	UFBX_MATERIAL_PBR_NORMAL_MAP,
 	UFBX_MATERIAL_PBR_TANGENT_MAP,
 	UFBX_MATERIAL_PBR_DISPLACEMENT_MAP,
 	UFBX_MATERIAL_PBR_MATTE_FACTOR,
 	UFBX_MATERIAL_PBR_MATTE_COLOR,
 	UFBX_MATERIAL_PBR_AMBIENT_OCCLUSION,
 	UFBX_MATERIAL_PBR_GLOSSINESS,
 	UFBX_MATERIAL_PBR_COAT_GLOSSINESS,
 	UFBX_MATERIAL_PBR_TRANSMISSION_GLOSSINESS,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_MATERIAL_PBR_MAP)
 } ufbx_material_pbr_map;
 
 UFBX_ENUM_TYPE(ufbx_material_pbr_map, UFBX_MATERIAL_PBR_MAP, UFBX_MATERIAL_PBR_TRANSMISSION_GLOSSINESS);
 
 // Known material features
 typedef enum ufbx_material_feature UFBX_ENUM_REPR {
 	UFBX_MATERIAL_FEATURE_PBR,
 	UFBX_MATERIAL_FEATURE_METALNESS,
 	UFBX_MATERIAL_FEATURE_DIFFUSE,
 	UFBX_MATERIAL_FEATURE_SPECULAR,
 	UFBX_MATERIAL_FEATURE_EMISSION,
 	UFBX_MATERIAL_FEATURE_TRANSMISSION,
 	UFBX_MATERIAL_FEATURE_COAT,
 	UFBX_MATERIAL_FEATURE_SHEEN,
 	UFBX_MATERIAL_FEATURE_OPACITY,
 	UFBX_MATERIAL_FEATURE_AMBIENT_OCCLUSION,
 	UFBX_MATERIAL_FEATURE_MATTE,
 	UFBX_MATERIAL_FEATURE_UNLIT,
 	UFBX_MATERIAL_FEATURE_IOR,
 	UFBX_MATERIAL_FEATURE_DIFFUSE_ROUGHNESS,
 	UFBX_MATERIAL_FEATURE_TRANSMISSION_ROUGHNESS,
 	UFBX_MATERIAL_FEATURE_THIN_WALLED,
 	UFBX_MATERIAL_FEATURE_CAUSTICS,
 	UFBX_MATERIAL_FEATURE_EXIT_TO_BACKGROUND,
 	UFBX_MATERIAL_FEATURE_INTERNAL_REFLECTIONS,
 	UFBX_MATERIAL_FEATURE_DOUBLE_SIDED,
 	UFBX_MATERIAL_FEATURE_ROUGHNESS_AS_GLOSSINESS,
 	UFBX_MATERIAL_FEATURE_COAT_ROUGHNESS_AS_GLOSSINESS,
 	UFBX_MATERIAL_FEATURE_TRANSMISSION_ROUGHNESS_AS_GLOSSINESS,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_MATERIAL_FEATURE)
 } ufbx_material_feature;
 
 UFBX_ENUM_TYPE(ufbx_material_feature, UFBX_MATERIAL_FEATURE, UFBX_MATERIAL_FEATURE_TRANSMISSION_ROUGHNESS_AS_GLOSSINESS);
 
 typedef struct ufbx_material_fbx_maps {
 	union {
 		ufbx_material_map maps[UFBX_MATERIAL_FBX_MAP_COUNT];
 		struct {
 			ufbx_material_map diffuse_factor;
 			ufbx_material_map diffuse_color;
 			ufbx_material_map specular_factor;
 			ufbx_material_map specular_color;
 			ufbx_material_map specular_exponent;
 			ufbx_material_map reflection_factor;
 			ufbx_material_map reflection_color;
 			ufbx_material_map transparency_factor;
 			ufbx_material_map transparency_color;
 			ufbx_material_map emission_factor;
 			ufbx_material_map emission_color;
 			ufbx_material_map ambient_factor;
 			ufbx_material_map ambient_color;
 			ufbx_material_map normal_map;
 			ufbx_material_map bump;
 			ufbx_material_map bump_factor;
 			ufbx_material_map displacement_factor;
 			ufbx_material_map displacement;
 			ufbx_material_map vector_displacement_factor;
 			ufbx_material_map vector_displacement;
 		};
 	};
 } ufbx_material_fbx_maps;
 
 typedef struct ufbx_material_pbr_maps {
 	union {
 		ufbx_material_map maps[UFBX_MATERIAL_PBR_MAP_COUNT];
 		struct {
 			ufbx_material_map base_factor;
 			ufbx_material_map base_color;
 			ufbx_material_map roughness;
 			ufbx_material_map metalness;
 			ufbx_material_map diffuse_roughness;
 			ufbx_material_map specular_factor;
 			ufbx_material_map specular_color;
 			ufbx_material_map specular_ior;
 			ufbx_material_map specular_anisotropy;
 			ufbx_material_map specular_rotation;
 			ufbx_material_map transmission_factor;
 			ufbx_material_map transmission_color;
 			ufbx_material_map transmission_depth;
 			ufbx_material_map transmission_scatter;
 			ufbx_material_map transmission_scatter_anisotropy;
 			ufbx_material_map transmission_dispersion;
 			ufbx_material_map transmission_roughness;
 			ufbx_material_map transmission_extra_roughness;
 			ufbx_material_map transmission_priority;
 			ufbx_material_map transmission_enable_in_aov;
 			ufbx_material_map subsurface_factor;
 			ufbx_material_map subsurface_color;
 			ufbx_material_map subsurface_radius;
 			ufbx_material_map subsurface_scale;
 			ufbx_material_map subsurface_anisotropy;
 			ufbx_material_map subsurface_tint_color;
 			ufbx_material_map subsurface_type;
 			ufbx_material_map sheen_factor;
 			ufbx_material_map sheen_color;
 			ufbx_material_map sheen_roughness;
 			ufbx_material_map coat_factor;
 			ufbx_material_map coat_color;
 			ufbx_material_map coat_roughness;
 			ufbx_material_map coat_ior;
 			ufbx_material_map coat_anisotropy;
 			ufbx_material_map coat_rotation;
 			ufbx_material_map coat_normal;
 			ufbx_material_map coat_affect_base_color;
 			ufbx_material_map coat_affect_base_roughness;
 			ufbx_material_map thin_film_factor;
 			ufbx_material_map thin_film_thickness;
 			ufbx_material_map thin_film_ior;
 			ufbx_material_map emission_factor;
 			ufbx_material_map emission_color;
 			ufbx_material_map opacity;
 			ufbx_material_map indirect_diffuse;
 			ufbx_material_map indirect_specular;
 			ufbx_material_map normal_map;
 			ufbx_material_map tangent_map;
 			ufbx_material_map displacement_map;
 			ufbx_material_map matte_factor;
 			ufbx_material_map matte_color;
 			ufbx_material_map ambient_occlusion;
 			ufbx_material_map glossiness;
 			ufbx_material_map coat_glossiness;
 			ufbx_material_map transmission_glossiness;
 		};
 	};
 } ufbx_material_pbr_maps;
 
 typedef struct ufbx_material_features {
 	union {
 		ufbx_material_feature_info features[UFBX_MATERIAL_FEATURE_COUNT];
 		struct {
 			ufbx_material_feature_info pbr;
 			ufbx_material_feature_info metalness;
 			ufbx_material_feature_info diffuse;
 			ufbx_material_feature_info specular;
 			ufbx_material_feature_info emission;
 			ufbx_material_feature_info transmission;
 			ufbx_material_feature_info coat;
 			ufbx_material_feature_info sheen;
 			ufbx_material_feature_info opacity;
 			ufbx_material_feature_info ambient_occlusion;
 			ufbx_material_feature_info matte;
 			ufbx_material_feature_info unlit;
 			ufbx_material_feature_info ior;
 			ufbx_material_feature_info diffuse_roughness;
 			ufbx_material_feature_info transmission_roughness;
 			ufbx_material_feature_info thin_walled;
 			ufbx_material_feature_info caustics;
 			ufbx_material_feature_info exit_to_background;
 			ufbx_material_feature_info internal_reflections;
 			ufbx_material_feature_info double_sided;
 			ufbx_material_feature_info roughness_as_glossiness;
 			ufbx_material_feature_info coat_roughness_as_glossiness;
 			ufbx_material_feature_info transmission_roughness_as_glossiness;
 		};
 	};
 } ufbx_material_features;
 
 // Surface material properties such as color, roughness, etc. Each property may
 // be optionally bound to an `ufbx_texture`.
 struct ufbx_material {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// FBX builtin properties
 	// NOTE: These may be empty if the material is using a custom shader
 	ufbx_material_fbx_maps fbx;
 
 	// PBR material properties, defined for all shading models but may be
 	// somewhat approximate if `shader == NULL`.
 	ufbx_material_pbr_maps pbr;
 
 	// Material features, primarily applies to `pbr`.
 	ufbx_material_features features;
 
 	// Shading information
 	ufbx_shader_type shader_type;      // < Always defined
 	ufbx_nullable ufbx_shader *shader; // < Optional extended shader information
 	ufbx_string shading_model_name;    // < Often one of `{ "lambert", "phong", "unknown" }`
 
 	// Prefix before shader property names with trailing `|`.
 	// For example `"3dsMax|Parameters|"` where properties would have names like
 	// `"3dsMax|Parameters|base_color"`. You can ignore this if you use the built-in
 	// `ufbx_material_fbx_maps fbx` and `ufbx_material_pbr_maps pbr` structures.
 	ufbx_string shader_prop_prefix;
 
 	// All textures attached to the material, if you want specific maps if might be
 	// more convenient to use eg. `fbx.diffuse_color.texture` or `pbr.base_color.texture`
 	ufbx_material_texture_list textures; // < Sorted by `material_prop`
 };
 
 typedef enum ufbx_texture_type UFBX_ENUM_REPR {
 
 	// Texture associated with an image file/sequence. `texture->filename` and
 	// and `texture->relative_filename` contain the texture's path. If the file
 	// has embedded content `texture->content` may hold `texture->content_size`
 	// bytes of raw image data.
 	UFBX_TEXTURE_FILE,
 
 	// The texture consists of multiple texture layers blended together.
 	UFBX_TEXTURE_LAYERED,
 
 	// Reserved as these _should_ exist in FBX files.
 	UFBX_TEXTURE_PROCEDURAL,
 
 	// Node in a shader graph.
 	// Use `ufbx_texture.shader` for more information.
 	UFBX_TEXTURE_SHADER,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_TEXTURE_TYPE)
 } ufbx_texture_type;
 
 UFBX_ENUM_TYPE(ufbx_texture_type, UFBX_TEXTURE_TYPE, UFBX_TEXTURE_SHADER);
 
 // Blend modes to combine layered textures with, compatible with common blend
 // mode definitions in many art programs. Simpler blend modes have equations
 // specified below where `src` is the layer to composite over `dst`.
 // See eg. https://www.w3.org/TR/2013/WD-compositing-1-20131010/#blendingseparable
 typedef enum ufbx_blend_mode UFBX_ENUM_REPR {
 	UFBX_BLEND_TRANSLUCENT,   // < `src` effects result alpha
 	UFBX_BLEND_ADDITIVE,      // < `src + dst`
 	UFBX_BLEND_MULTIPLY,      // < `src * dst`
 	UFBX_BLEND_MULTIPLY_2X,   // < `2 * src * dst`
 	UFBX_BLEND_OVER,          // < `src * src_alpha + dst * (1-src_alpha)`
 	UFBX_BLEND_REPLACE,       // < `src` Replace the contents
 	UFBX_BLEND_DISSOLVE,      // < `random() + src_alpha >= 1.0 ? src : dst`
 	UFBX_BLEND_DARKEN,        // < `min(src, dst)`
 	UFBX_BLEND_COLOR_BURN,    // < `src > 0 ? 1 - min(1, (1-dst) / src) : 0`
 	UFBX_BLEND_LINEAR_BURN,   // < `src + dst - 1`
 	UFBX_BLEND_DARKER_COLOR,  // < `value(src) < value(dst) ? src : dst`
 	UFBX_BLEND_LIGHTEN,       // < `max(src, dst)`
 	UFBX_BLEND_SCREEN,        // < `1 - (1-src)*(1-dst)`
 	UFBX_BLEND_COLOR_DODGE,   // < `src < 1 ? dst / (1 - src)` : (dst>0?1:0)`
 	UFBX_BLEND_LINEAR_DODGE,  // < `src + dst`
 	UFBX_BLEND_LIGHTER_COLOR, // < `value(src) > value(dst) ? src : dst`
 	UFBX_BLEND_SOFT_LIGHT,    // < https://www.w3.org/TR/2013/WD-compositing-1-20131010/#blendingsoftlight
 	UFBX_BLEND_HARD_LIGHT,    // < https://www.w3.org/TR/2013/WD-compositing-1-20131010/#blendinghardlight
 	UFBX_BLEND_VIVID_LIGHT,   // < Combination of `COLOR_DODGE` and `COLOR_BURN`
 	UFBX_BLEND_LINEAR_LIGHT,  // < Combination of `LINEAR_DODGE` and `LINEAR_BURN`
 	UFBX_BLEND_PIN_LIGHT,     // < Combination of `DARKEN` and `LIGHTEN`
 	UFBX_BLEND_HARD_MIX,      // < Produces primary colors depending on similarity
 	UFBX_BLEND_DIFFERENCE,    // < `abs(src - dst)`
 	UFBX_BLEND_EXCLUSION,     // < `dst + src - 2 * src * dst`
 	UFBX_BLEND_SUBTRACT,      // < `dst - src`
 	UFBX_BLEND_DIVIDE,        // < `dst / src`
 	UFBX_BLEND_HUE,           // < Replace hue
 	UFBX_BLEND_SATURATION,    // < Replace saturation
 	UFBX_BLEND_COLOR,         // < Replace hue and saturatio
 	UFBX_BLEND_LUMINOSITY,    // < Replace value
 	UFBX_BLEND_OVERLAY,       // < Same as `HARD_LIGHT` but with `src` and `dst` swapped
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_BLEND_MODE)
 } ufbx_blend_mode;
 
 UFBX_ENUM_TYPE(ufbx_blend_mode, UFBX_BLEND_MODE, UFBX_BLEND_OVERLAY);
 
 // Blend modes to combine layered textures with, compatible with common blend
 typedef enum ufbx_wrap_mode UFBX_ENUM_REPR {
 	UFBX_WRAP_REPEAT, // < Repeat the texture past the [0,1] range
 	UFBX_WRAP_CLAMP,  // < Clamp the normalized texture coordinates to [0,1]
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_WRAP_MODE)
 } ufbx_wrap_mode;
 
 UFBX_ENUM_TYPE(ufbx_wrap_mode, UFBX_WRAP_MODE, UFBX_WRAP_CLAMP);
 
 // Single layer in a layered texture
 typedef struct ufbx_texture_layer {
 	ufbx_texture *texture;      // < The inner texture to evaluate, never `NULL`
 	ufbx_blend_mode blend_mode; // < Equation to combine the layer to the background
 	ufbx_real alpha;            // < Blend weight of this layer
 } ufbx_texture_layer;
 
 UFBX_LIST_TYPE(ufbx_texture_layer_list, ufbx_texture_layer);
 
 typedef enum ufbx_shader_texture_type UFBX_ENUM_REPR {
 	UFBX_SHADER_TEXTURE_UNKNOWN,
 
 	// Select an output of a multi-output shader.
 	// HINT: If this type is used the `ufbx_shader_texture.main_texture` and
 	// `ufbx_shader_texture.main_texture_output_index` fields are set.
 	UFBX_SHADER_TEXTURE_SELECT_OUTPUT,
 
 	// Open Shading Language (OSL) shader.
 	// https://github.com/AcademySoftwareFoundation/OpenShadingLanguage
 	UFBX_SHADER_TEXTURE_OSL,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_SHADER_TEXTURE_TYPE)
 } ufbx_shader_texture_type;
 
 UFBX_ENUM_TYPE(ufbx_shader_texture_type, UFBX_SHADER_TEXTURE_TYPE, UFBX_SHADER_TEXTURE_OSL);
 
 // Input to a shader texture, see `ufbx_shader_texture`.
 typedef struct ufbx_shader_texture_input {
 
 	// Name of the input.
 	ufbx_string name;
 
 	// Constant value of the input.
 	union {
 		ufbx_real value_real;
 		ufbx_vec2 value_vec2;
 		ufbx_vec3 value_vec3;
 		ufbx_vec4 value_vec4;
 	};
 	int64_t value_int;
 	ufbx_string value_str;
 	ufbx_blob value_blob;
 
 	// Texture connected to this input.
 	ufbx_nullable ufbx_texture *texture;
 
 	// Index of the output to use if `texture` is a multi-output shader node.
 	int64_t texture_output_index;
 
 	// Controls whether shading should use `texture`.
 	// NOTE: Some shading models allow this to be `true` even if `texture == NULL`.
 	bool texture_enabled;
 
 	// Property representing this input.
 	ufbx_prop *prop;
 
 	// Property representing `texture`.
 	ufbx_nullable ufbx_prop *texture_prop;
 
 	// Property representing `texture_enabled`.
 	ufbx_nullable ufbx_prop *texture_enabled_prop;
 
 } ufbx_shader_texture_input;
 
 UFBX_LIST_TYPE(ufbx_shader_texture_input_list, ufbx_shader_texture_input);
 
 // Texture that emulates a shader graph node.
 // 3ds Max exports some materials as node graphs serialized to textures.
 // ufbx can parse a small subset of these, as normal maps are often hidden behind
 // some kind of bump node.
 // NOTE: These encode a lot of details of 3ds Max internals, not recommended for direct use.
 // HINT: `ufbx_texture.file_textures[]` contains a list of "real" textures that are connected
 // to the `ufbx_texture` that is pretending to be a shader node.
 typedef struct ufbx_shader_texture {
 
 	// Type of this shader node.
 	ufbx_shader_texture_type type;
 
 	// Name of the shader to use.
 	ufbx_string shader_name;
 
 	// 64-bit opaque identifier for the shader type.
 	uint64_t shader_type_id;
 
 	// Input values/textures (possibly further shader textures) to the shader.
 	// Sorted by `ufbx_shader_texture_input.name`.
 	ufbx_shader_texture_input_list inputs;
 
 	// Shader source code if found.
 	ufbx_string shader_source;
 	ufbx_blob raw_shader_source;
 
 	// Representative texture for this shader.
 	// Only specified if `main_texture.outputs[main_texture_output_index]` is semantically
 	// equivalent to this texture.
 	ufbx_texture *main_texture;
 
 	// Output index of `main_texture` if it is a multi-output shader.
 	int64_t main_texture_output_index;
 
 	// Prefix for properties related to this shader in `ufbx_texture`.
 	// NOTE: Contains the trailing '|' if not empty.
 	ufbx_string prop_prefix;
 
 } ufbx_shader_texture;
 
 // Unique texture within the file.
 typedef struct ufbx_texture_file {
 
 	// Index in `ufbx_scene.texture_files[]`.
 	uint32_t index;
 
 	// Paths to the resource.
 
 	// Filename relative to the currently loaded file.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_string filename;
 	// Absolute filename specified in the file.
 	ufbx_string absolute_filename;
 	// Relative filename specified in the file.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_string relative_filename;
 
 	// Filename relative to the loaded file, non-UTF-8 encoded.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_blob raw_filename;
 	// Absolute filename specified in the file, non-UTF-8 encoded.
 	ufbx_blob raw_absolute_filename;
 	// Relative filename specified in the file, non-UTF-8 encoded.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_blob raw_relative_filename;
 
 	// Optional embedded content blob, eg. raw .png format data
 	ufbx_blob content;
 
 } ufbx_texture_file;
 
 UFBX_LIST_TYPE(ufbx_texture_file_list, ufbx_texture_file);
 
 // Texture that controls material appearance
 struct ufbx_texture {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Texture type (file / layered / procedural / shader)
 	ufbx_texture_type type;
 
 	// FILE: Paths to the resource
 
 	// Filename relative to the currently loaded file.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_string filename;
 	// Absolute filename specified in the file.
 	ufbx_string absolute_filename;
 	// Relative filename specified in the file.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_string relative_filename;
 
 	// Filename relative to the loaded file, non-UTF-8 encoded.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_blob raw_filename;
 	// Absolute filename specified in the file, non-UTF-8 encoded.
 	ufbx_blob raw_absolute_filename;
 	// Relative filename specified in the file, non-UTF-8 encoded.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_blob raw_relative_filename;
 
 	// FILE: Optional embedded content blob, eg. raw .png format data
 	ufbx_blob content;
 
 	// FILE: Optional video texture
 	ufbx_nullable ufbx_video *video;
 
 	// FILE: Index into `ufbx_scene.texture_files[]` or `UFBX_NO_INDEX`.
 	uint32_t file_index;
 
 	// FILE: True if `file_index` has a valid value.
 	bool has_file;
 
 	// LAYERED: Inner texture layers, ordered from _bottom_ to _top_
 	ufbx_texture_layer_list layers;
 
 	// SHADER: Shader information
 	// NOTE: May be specified even if `type == UFBX_TEXTURE_FILE` if `ufbx_load_opts.disable_quirks`
 	// is _not_ specified. Some known shaders that represent files are interpreted as `UFBX_TEXTURE_FILE`.
 	ufbx_nullable ufbx_shader_texture *shader;
 
 	// List of file textures representing this texture.
 	// Defined even if `type == UFBX_TEXTURE_FILE` in which case the array contains only itself.
 	ufbx_texture_list file_textures;
 
 	// Name of the UV set to use
 	ufbx_string uv_set;
 
 	// Wrapping mode
 	ufbx_wrap_mode wrap_u;
 	ufbx_wrap_mode wrap_v;
 
 	// UV transform
 	bool has_uv_transform;       // < Has a non-identity `transform` and derived matrices.
 	ufbx_transform uv_transform; // < Texture transformation in UV space
 	ufbx_matrix texture_to_uv;   // < Matrix representation of `transform`
 	ufbx_matrix uv_to_texture;   // < UV coordinate to normalized texture coordinate matrix
 };
 
 // TODO: Video textures
 struct ufbx_video {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Paths to the resource
 
 	// Filename relative to the currently loaded file.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_string filename;
 	// Absolute filename specified in the file.
 	ufbx_string absolute_filename;
 	// Relative filename specified in the file.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_string relative_filename;
 
 	// Filename relative to the loaded file, non-UTF-8 encoded.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_blob raw_filename;
 	// Absolute filename specified in the file, non-UTF-8 encoded.
 	ufbx_blob raw_absolute_filename;
 	// Relative filename specified in the file, non-UTF-8 encoded.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_blob raw_relative_filename;
 
 	// Optional embedded content blob
 	ufbx_blob content;
 };
 
 // Shader specifies a shading model and contains `ufbx_shader_binding` elements
 // that define how to interpret FBX properties in the shader.
 struct ufbx_shader {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Known shading model
 	ufbx_shader_type type;
 
 	// TODO: Expose actual properties here
 
 	// Bindings from FBX properties to the shader
 	// HINT: `ufbx_find_shader_prop()` translates shader properties to FBX properties
 	ufbx_shader_binding_list bindings;
 };
 
 // Binding from a material property to shader implementation
 typedef struct ufbx_shader_prop_binding {
 	ufbx_string shader_prop;   // < Property name used by the shader implementation
 	ufbx_string material_prop; // < Property name inside `ufbx_material.props`
 } ufbx_shader_prop_binding;
 
 UFBX_LIST_TYPE(ufbx_shader_prop_binding_list, ufbx_shader_prop_binding);
 
 // Shader binding table
 struct ufbx_shader_binding {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	ufbx_shader_prop_binding_list prop_bindings; // < Sorted by `shader_prop`
 };
 
 // -- Animation
 
 typedef struct ufbx_prop_override {
 	uint32_t element_id;
 
 	uint32_t _internal_key;
 
 	ufbx_string prop_name;
 	ufbx_vec4 value;
 	ufbx_string value_str;
 	int64_t value_int;
 } ufbx_prop_override;
 
 UFBX_LIST_TYPE(ufbx_prop_override_list, ufbx_prop_override);
 
 typedef struct ufbx_transform_override {
 	uint32_t node_id;
 	ufbx_transform transform;
 } ufbx_transform_override;
 
 UFBX_LIST_TYPE(ufbx_transform_override_list, ufbx_transform_override);
 
 // Animation descriptor used for evaluating animation.
 // Usually obtained from `ufbx_scene` via either global animation `ufbx_scene.anim`,
 // per-stack animation `ufbx_anim_stack.anim` or per-layer animation `ufbx_anim_layer.anim`.
 //
 // For advanced usage you can use `ufbx_create_anim()` to create animation descriptors
 // with custom layers, property overrides, special flags, etc.
 typedef struct ufbx_anim {
 
 	// Time begin/end for the animation, both may be zero if absent.
 	double time_begin;
 	double time_end;
 
 	// List of layers in the animation.
 	ufbx_anim_layer_list layers;
 
 	// Optional overrides for weights for each layer in `layers[]`.
 	ufbx_real_list override_layer_weights;
 
 	// Sorted by `element_id, prop_name`
 	ufbx_prop_override_list prop_overrides;
 
 	// Sorted by `node_id`
 	ufbx_transform_override_list transform_overrides;
 
 	// Evaluate connected properties as if they would not be connected.
 	bool ignore_connections;
 
 	// Custom `ufbx_anim` created by `ufbx_create_anim()`.
 	bool custom;
 
 } ufbx_anim;
 
 struct ufbx_anim_stack {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	double time_begin;
 	double time_end;
 
 	ufbx_anim_layer_list layers;
 	ufbx_anim *anim;
 };
 
 typedef struct ufbx_anim_prop {
 	ufbx_element *element;
 
 	uint32_t _internal_key;
 
 	ufbx_string prop_name;
 	ufbx_anim_value *anim_value;
 } ufbx_anim_prop;
 
 UFBX_LIST_TYPE(ufbx_anim_prop_list, ufbx_anim_prop);
 
 struct ufbx_anim_layer {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	ufbx_real weight;
 	bool weight_is_animated;
 	bool blended;
 	bool additive;
 	bool compose_rotation;
 	bool compose_scale;
 
 	ufbx_anim_value_list anim_values;
 	ufbx_anim_prop_list anim_props; // < Sorted by `element,prop_name`
 
 	ufbx_anim *anim;
 
 	uint32_t _min_element_id;
 	uint32_t _max_element_id;
 	uint32_t _element_id_bitmask[4];
 };
 
 struct ufbx_anim_value {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	ufbx_vec3 default_value;
 	ufbx_nullable ufbx_anim_curve *curves[3];
 };
 
 // Animation curve segment interpolation mode between two keyframes
 typedef enum ufbx_interpolation UFBX_ENUM_REPR {
 	UFBX_INTERPOLATION_CONSTANT_PREV, // < Hold previous key value
 	UFBX_INTERPOLATION_CONSTANT_NEXT, // < Hold next key value
 	UFBX_INTERPOLATION_LINEAR,        // < Linear interpolation between two keys
 	UFBX_INTERPOLATION_CUBIC,         // < Cubic interpolation, see `ufbx_tangent`
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_INTERPOLATION)
 } ufbx_interpolation;
 
 UFBX_ENUM_TYPE(ufbx_interpolation, UFBX_INTERPOLATION, UFBX_INTERPOLATION_CUBIC);
 
 typedef enum ufbx_extrapolation_mode UFBX_ENUM_REPR {
 	UFBX_EXTRAPOLATION_CONSTANT,        // < Use the value of the first/last keyframe
 	UFBX_EXTRAPOLATION_REPEAT,          // < Repeat the whole animation curve
 	UFBX_EXTRAPOLATION_MIRROR,          // < Repeat with mirroring
 	UFBX_EXTRAPOLATION_SLOPE,           // < Use the tangent of the last keyframe to linearly extrapolate
 	UFBX_EXTRAPOLATION_REPEAT_RELATIVE, // < Repeat the animation curve but connect the first and last keyframe values
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_EXTRAPOLATION)
 } ufbx_extrapolation_mode;
 
 UFBX_ENUM_TYPE(ufbx_extrapolation_mode, UFBX_EXTRAPOLATION_MODE, UFBX_EXTRAPOLATION_REPEAT_RELATIVE);
 
 typedef struct ufbx_extrapolation {
 	ufbx_extrapolation_mode mode;
 
 	// Count used for repeating modes.
 	// Negative values mean infinite repetition.
 	int32_t repeat_count;
 } ufbx_extrapolation;
 
 // Tangent vector at a keyframe, may be split into left/right
 typedef struct ufbx_tangent {
 	float dx; // < Derivative in the time axis
 	float dy; // < Derivative in the (curve specific) value axis
 } ufbx_tangent;
 
 // Single real `value` at a specified `time`, interpolation between two keyframes
 // is determined by the `interpolation` field of the _previous_ key.
 // If `interpolation == UFBX_INTERPOLATION_CUBIC` the span is evaluated as a
 // cubic bezier curve through the following points:
 //
 //   (prev->time, prev->value)
 //   (prev->time + prev->right.dx, prev->value + prev->right.dy)
 //   (next->time - next->left.dx, next->value - next->left.dy)
 //   (next->time, next->value)
 //
 // HINT: You can use `ufbx_evaluate_curve(ufbx_anim_curve *curve, double time)`
 // rather than trying to manually handle all the interpolation modes.
 typedef struct ufbx_keyframe {
 	double time;
 	ufbx_real value;
 	ufbx_interpolation interpolation;
 	ufbx_tangent left;
 	ufbx_tangent right;
 } ufbx_keyframe;
 
 UFBX_LIST_TYPE(ufbx_keyframe_list, ufbx_keyframe);
 
 struct ufbx_anim_curve {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// List of keyframes that define the curve.
 	ufbx_keyframe_list keyframes;
 
 	// Extrapolation before the curve.
 	ufbx_extrapolation pre_extrapolation;
 	// Extrapolation after the curve.
 	ufbx_extrapolation post_extrapolation;
 
 	// Value range for all the keyframes.
 	ufbx_real min_value;
 	ufbx_real max_value;
 
 	// Time range for all the keyframes.
 	double min_time;
 	double max_time;
 };
 
 // -- Collections
 
 // Collection of nodes to hide/freeze
 struct ufbx_display_layer {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Nodes included in the layer (exclusively at most one layer per node)
 	ufbx_node_list nodes;
 
 	// Layer state
 	bool visible; // < Contained nodes are visible
 	bool frozen;  // < Contained nodes cannot be edited
 
 	ufbx_vec3 ui_color; // < Visual color for UI
 };
 
 // Named set of nodes/geometry features to select.
 struct ufbx_selection_set {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Included nodes and geometry features
 	ufbx_selection_node_list nodes;
 };
 
 // Selection state of a node, potentially contains vertex/edge/face selection as well.
 struct ufbx_selection_node {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Selection targets, possibly `NULL`
 	ufbx_nullable ufbx_node *target_node;
 	ufbx_nullable ufbx_mesh *target_mesh;
 	bool include_node; // < Is `target_node` included in the selection
 
 	// Indices to selected components.
 	// Guaranteed to be valid as per `ufbx_load_opts.index_error_handling`
 	// if `target_mesh` is not `NULL`.
 	ufbx_uint32_list vertices; // < Indices to `ufbx_mesh.vertices`
 	ufbx_uint32_list edges;    // < Indices to `ufbx_mesh.edges`
 	ufbx_uint32_list faces;    // < Indices to `ufbx_mesh.faces`
 };
 
 // -- Constraints
 
 struct ufbx_character {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 };
 
 // Type of property constrain eg. position or look-at
 typedef enum ufbx_constraint_type UFBX_ENUM_REPR {
 	UFBX_CONSTRAINT_UNKNOWN,
 	UFBX_CONSTRAINT_AIM,
 	UFBX_CONSTRAINT_PARENT,
 	UFBX_CONSTRAINT_POSITION,
 	UFBX_CONSTRAINT_ROTATION,
 	UFBX_CONSTRAINT_SCALE,
 	// Inverse kinematic chain to a single effector `ufbx_constraint.ik_effector`
 	// `targets` optionally contains a list of pole targets!
 	UFBX_CONSTRAINT_SINGLE_CHAIN_IK,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_CONSTRAINT_TYPE)
 } ufbx_constraint_type;
 
 UFBX_ENUM_TYPE(ufbx_constraint_type, UFBX_CONSTRAINT_TYPE, UFBX_CONSTRAINT_SINGLE_CHAIN_IK);
 
 // Target to follow with a constraint
 typedef struct ufbx_constraint_target {
 	ufbx_node *node;          // < Target node reference
 	ufbx_real weight;         // < Relative weight to other targets (does not always sum to 1)
 	ufbx_transform transform; // < Offset from the actual target
 } ufbx_constraint_target;
 
 UFBX_LIST_TYPE(ufbx_constraint_target_list, ufbx_constraint_target);
 
 // Method to determine the up vector in aim constraints
 typedef enum ufbx_constraint_aim_up_type UFBX_ENUM_REPR {
 	UFBX_CONSTRAINT_AIM_UP_SCENE,      // < Align the up vector to the scene global up vector
 	UFBX_CONSTRAINT_AIM_UP_TO_NODE,    // < Aim the up vector at `ufbx_constraint.aim_up_node`
 	UFBX_CONSTRAINT_AIM_UP_ALIGN_NODE, // < Copy the up vector from `ufbx_constraint.aim_up_node`
 	UFBX_CONSTRAINT_AIM_UP_VECTOR,     // < Use `ufbx_constraint.aim_up_vector` as the up vector
 	UFBX_CONSTRAINT_AIM_UP_NONE,       // < Don't align the up vector to anything
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_CONSTRAINT_AIM_UP_TYPE)
 } ufbx_constraint_aim_up_type;
 
 UFBX_ENUM_TYPE(ufbx_constraint_aim_up_type, UFBX_CONSTRAINT_AIM_UP_TYPE, UFBX_CONSTRAINT_AIM_UP_NONE);
 
 // Method to determine the up vector in aim constraints
 typedef enum ufbx_constraint_ik_pole_type UFBX_ENUM_REPR {
 	UFBX_CONSTRAINT_IK_POLE_VECTOR, // < Use towards calculated from `ufbx_constraint.targets`
 	UFBX_CONSTRAINT_IK_POLE_NODE,   // < Use `ufbx_constraint.ik_pole_vector` directly
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_CONSTRAINT_IK_POLE_TYPE)
 } ufbx_constraint_ik_pole_type;
 
 UFBX_ENUM_TYPE(ufbx_constraint_ik_pole_type, UFBX_CONSTRAINT_IK_POLE_TYPE, UFBX_CONSTRAINT_IK_POLE_NODE);
 
 struct ufbx_constraint {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Type of constraint to use
 	ufbx_constraint_type type;
 	ufbx_string type_name;
 
 	// Node to be constrained
 	ufbx_nullable ufbx_node *node;
 
 	// List of weighted targets for the constraint (pole vectors for IK)
 	ufbx_constraint_target_list targets;
 
 	// State of the constraint
 	ufbx_real weight;
 	bool active;
 
 	// Translation/rotation/scale axes the constraint is applied to
 	bool constrain_translation[3];
 	bool constrain_rotation[3];
 	bool constrain_scale[3];
 
 	// Offset from the constrained position
 	ufbx_transform transform_offset;
 
 	// AIM: Target and up vectors
 	ufbx_vec3 aim_vector;
 	ufbx_constraint_aim_up_type aim_up_type;
 	ufbx_nullable ufbx_node *aim_up_node;
 	ufbx_vec3 aim_up_vector;
 
 	// SINGLE_CHAIN_IK: Target for the IK, `targets` contains pole vectors!
 	ufbx_nullable ufbx_node *ik_effector;
 	ufbx_nullable ufbx_node *ik_end_node;
 	ufbx_vec3 ik_pole_vector;
 };
 
 // -- Audio
 
 struct ufbx_audio_layer {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Clips contained in this layer.
 	ufbx_audio_clip_list clips;
 };
 
 struct ufbx_audio_clip {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Filename relative to the currently loaded file.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_string filename;
 	// Absolute filename specified in the file.
 	ufbx_string absolute_filename;
 	// Relative filename specified in the file.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_string relative_filename;
 
 	// Filename relative to the loaded file, non-UTF-8 encoded.
 	// HINT: If using functions other than `ufbx_load_file()`, you can provide
 	// `ufbx_load_opts.filename/raw_filename` to let ufbx resolve this.
 	ufbx_blob raw_filename;
 	// Absolute filename specified in the file, non-UTF-8 encoded.
 	ufbx_blob raw_absolute_filename;
 	// Relative filename specified in the file, non-UTF-8 encoded.
 	// NOTE: May be absolute if the file is saved in a different drive.
 	ufbx_blob raw_relative_filename;
 
 	// Optional embedded content blob, eg. raw .png format data
 	ufbx_blob content;
 };
 
 // -- Miscellaneous
 
 typedef struct ufbx_bone_pose {
 
 	// Node to apply the pose to.
 	ufbx_node *bone_node;
 
 	// Matrix from node local space to world space.
 	ufbx_matrix bone_to_world;
 
 	// Matrix from node local space to parent space.
 	// NOTE: FBX only stores world transformations so this is approximated from
 	// the parent world transform.
 	ufbx_matrix bone_to_parent;
 
 } ufbx_bone_pose;
 
 UFBX_LIST_TYPE(ufbx_bone_pose_list, ufbx_bone_pose);
 
 struct ufbx_pose {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 
 	// Set if this pose is marked as a bind pose.
 	bool is_bind_pose;
 
 	// List of bone poses.
 	// Sorted by `ufbx_node.typed_id`.
 	ufbx_bone_pose_list bone_poses;
 };
 
 struct ufbx_metadata_object {
 	union { ufbx_element element; struct {
 		ufbx_string name;
 		ufbx_props props;
 		uint32_t element_id;
 		uint32_t typed_id;
 	}; };
 };
 
 // -- Named elements
 
 typedef struct ufbx_name_element {
 	ufbx_string name;
 	ufbx_element_type type;
 
 	uint32_t _internal_key;
 
 	ufbx_element *element;
 } ufbx_name_element;
 
 UFBX_LIST_TYPE(ufbx_name_element_list, ufbx_name_element);
 
 // -- Scene
 
 // Scene is the root object loaded by ufbx that everything is accessed from.
 
 typedef enum ufbx_exporter UFBX_ENUM_REPR {
 	UFBX_EXPORTER_UNKNOWN,
 	UFBX_EXPORTER_FBX_SDK,
 	UFBX_EXPORTER_BLENDER_BINARY,
 	UFBX_EXPORTER_BLENDER_ASCII,
 	UFBX_EXPORTER_MOTION_BUILDER,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_EXPORTER)
 } ufbx_exporter;
 
 UFBX_ENUM_TYPE(ufbx_exporter, UFBX_EXPORTER, UFBX_EXPORTER_MOTION_BUILDER);
 
 typedef struct ufbx_application {
 	ufbx_string vendor;
 	ufbx_string name;
 	ufbx_string version;
 } ufbx_application;
 
 typedef enum ufbx_file_format UFBX_ENUM_REPR {
 	UFBX_FILE_FORMAT_UNKNOWN, // < Unknown file format
 	UFBX_FILE_FORMAT_FBX,     // < .fbx Kaydara/Autodesk FBX file
 	UFBX_FILE_FORMAT_OBJ,     // < .obj Wavefront OBJ file
 	UFBX_FILE_FORMAT_MTL,     // < .mtl Wavefront MTL (Material template library) file
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_FILE_FORMAT)
 } ufbx_file_format;
 
 UFBX_ENUM_TYPE(ufbx_file_format, UFBX_FILE_FORMAT, UFBX_FILE_FORMAT_MTL);
 
 typedef enum ufbx_warning_type UFBX_ENUM_REPR {
 	// Missing external file file (for example .mtl for Wavefront .obj file or a
 	// geometry cache)
 	UFBX_WARNING_MISSING_EXTERNAL_FILE,
 
 	// Loaded a Wavefront .mtl file derived from the filename instead of a proper
 	// `mtllib` statement.
 	UFBX_WARNING_IMPLICIT_MTL,
 
 	// Truncated array has been auto-expanded.
 	UFBX_WARNING_TRUNCATED_ARRAY,
 
 	// Geometry data has been defined but has no data.
 	UFBX_WARNING_MISSING_GEOMETRY_DATA,
 
 	// Duplicated connection between two elements that shouldn't have.
 	UFBX_WARNING_DUPLICATE_CONNECTION,
 
 	// Vertex 'W' attribute length differs from main attribute.
 	UFBX_WARNING_BAD_VERTEX_W_ATTRIBUTE,
 
 	// Missing polygon mapping type.
 	UFBX_WARNING_MISSING_POLYGON_MAPPING,
 
 	// Unsupported version, loaded but may be incorrect.
 	// If the loading fails `UFBX_ERROR_UNSUPPORTED_VERSION` is issued instead.
 	UFBX_WARNING_UNSUPPORTED_VERSION,
 
 	// Out-of-bounds index has been clamped to be in-bounds.
 	// HINT: You can use `ufbx_index_error_handling` to adjust behavior.
 	UFBX_WARNING_INDEX_CLAMPED,
 
 	// Non-UTF8 encoded strings.
 	// HINT: You can use `ufbx_unicode_error_handling` to adjust behavior.
 	UFBX_WARNING_BAD_UNICODE,
 
 	// Invalid base64-encoded embedded content ignored.
 	UFBX_WARNING_BAD_BASE64_CONTENT,
 
 	// Non-node element connected to root.
 	UFBX_WARNING_BAD_ELEMENT_CONNECTED_TO_ROOT,
 
 	// Duplicated object ID in the file, connections will be wrong.
 	UFBX_WARNING_DUPLICATE_OBJECT_ID,
 
 	// Empty face has been removed.
 	// Use `ufbx_load_opts.allow_empty_faces` if you want to allow them.
 	UFBX_WARNING_EMPTY_FACE_REMOVED,
 
 	// Unknown .obj file directive.
 	UFBX_WARNING_UNKNOWN_OBJ_DIRECTIVE,
 
 	// Warnings after this one are deduplicated.
 	// See `ufbx_warning.count` for how many times they happened.
 	UFBX_WARNING_TYPE_FIRST_DEDUPLICATED = UFBX_WARNING_INDEX_CLAMPED,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_WARNING_TYPE)
 } ufbx_warning_type;
 
 UFBX_ENUM_TYPE(ufbx_warning_type, UFBX_WARNING_TYPE, UFBX_WARNING_UNKNOWN_OBJ_DIRECTIVE);
 
 // Warning about a non-fatal issue in the file.
 // Often contains information about issues that ufbx has corrected about the
 // file but it might indicate something is not working properly.
 typedef struct ufbx_warning {
 	// Type of the warning.
 	ufbx_warning_type type;
 	// Description of the warning.
 	ufbx_string description;
 	// The element related to this warning or `UFBX_NO_INDEX` if not related to a specific element.
 	uint32_t element_id;
 	// Number of times this warning was encountered.
 	size_t count;
 } ufbx_warning;
 
 UFBX_LIST_TYPE(ufbx_warning_list, ufbx_warning);
 
 typedef enum ufbx_thumbnail_format UFBX_ENUM_REPR {
 	UFBX_THUMBNAIL_FORMAT_UNKNOWN, // < Unknown format
 	UFBX_THUMBNAIL_FORMAT_RGB_24,  // < 8-bit RGB pixels, in memory R,G,B
 	UFBX_THUMBNAIL_FORMAT_RGBA_32, // < 8-bit RGBA pixels, in memory R,G,B,A
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_THUMBNAIL_FORMAT)
 } ufbx_thumbnail_format;
 
 UFBX_ENUM_TYPE(ufbx_thumbnail_format, UFBX_THUMBNAIL_FORMAT, UFBX_THUMBNAIL_FORMAT_RGBA_32);
 
 // Specify how unit / coordinate system conversion should be performed.
 // Affects how `ufbx_load_opts.target_axes` and `ufbx_load_opts.target_unit_meters` work,
 // has no effect if neither is specified.
 typedef enum ufbx_space_conversion UFBX_ENUM_REPR {
 
 	// Store the space conversion transform in the root node.
 	// Sets `ufbx_node.local_transform` of the root node.
 	UFBX_SPACE_CONVERSION_TRANSFORM_ROOT,
 
 	// Perform the conversion by using "adjust" transforms.
 	// Compensates for the transforms using `ufbx_node.adjust_pre_rotation` and
 	// `ufbx_node.adjust_pre_scale`. You don't need to account for these unless
 	// you are manually building transforms from `ufbx_props`.
 	UFBX_SPACE_CONVERSION_ADJUST_TRANSFORMS,
 
 	// Perform the conversion by scaling geometry in addition to adjusting transforms.
 	// Compensates transforms like `UFBX_SPACE_CONVERSION_ADJUST_TRANSFORMS` but
 	// applies scaling to geometry as well.
 	UFBX_SPACE_CONVERSION_MODIFY_GEOMETRY,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_SPACE_CONVERSION)
 } ufbx_space_conversion;
 
 UFBX_ENUM_TYPE(ufbx_space_conversion, UFBX_SPACE_CONVERSION, UFBX_SPACE_CONVERSION_MODIFY_GEOMETRY);
 
 // Embedded thumbnail in the file, valid if the dimensions are non-zero.
 typedef struct ufbx_thumbnail {
 	ufbx_props props;
 
 	// Extents of the thumbnail
 	uint32_t width;
 	uint32_t height;
 
 	// Format of `ufbx_thumbnail.data`.
 	ufbx_thumbnail_format format;
 
 	// Thumbnail pixel data, layout as contiguous rows from bottom to top.
 	// See `ufbx_thumbnail.format` for the pixel format.
 	ufbx_blob data;
 } ufbx_thumbnail;
 
 // Miscellaneous data related to the loaded file
 typedef struct ufbx_metadata {
 
 	// List of non-fatal warnings about the file.
 	// If you need to only check whether a specific warning was triggered you
 	// can use `ufbx_metadata.has_warning[]`.
 	ufbx_warning_list warnings;
 
 	// FBX ASCII file format.
 	bool ascii;
 
 	// FBX version in integer format, eg. 7400 for 7.4.
 	uint32_t version;
 
 	// File format of the source file.
 	ufbx_file_format file_format;
 
 	// Index arrays may contain `UFBX_NO_INDEX` instead of a valid index
 	// to indicate gaps.
 	bool may_contain_no_index;
 
 	// May contain meshes with no defined vertex position.
 	// NOTE: `ufbx_mesh.vertex_position.exists` may be `false`!
 	bool may_contain_missing_vertex_position;
 
 	// Arrays may contain items with `NULL` element references.
 	// See `ufbx_load_opts.connect_broken_elements`.
 	bool may_contain_broken_elements;
 
 	// Some API guarantees do not apply (depending on unsafe options used).
 	// Loaded with `ufbx_load_opts.allow_unsafe` enabled.
 	bool is_unsafe;
 
 	// Flag for each possible warning type.
 	// See `ufbx_metadata.warnings[]` for detailed warning information.
 	bool has_warning[UFBX_WARNING_TYPE_COUNT];
 
 	ufbx_string creator;
 	bool big_endian;
 
 	ufbx_string filename;
 	ufbx_string relative_root;
 
 	ufbx_blob raw_filename;
 	ufbx_blob raw_relative_root;
 
 	ufbx_exporter exporter;
 	uint32_t exporter_version;
 
 	ufbx_props scene_props;
 
 	ufbx_application original_application;
 	ufbx_application latest_application;
 
 	ufbx_thumbnail thumbnail;
 
 	bool geometry_ignored;
 	bool animation_ignored;
 	bool embedded_ignored;
 
 	size_t max_face_triangles;
 
 	size_t result_memory_used;
 	size_t temp_memory_used;
 	size_t result_allocs;
 	size_t temp_allocs;
 
 	size_t element_buffer_size;
 	size_t num_shader_textures;
 
 	ufbx_real bone_prop_size_unit;
 	bool bone_prop_limb_length_relative;
 
 	ufbx_real ortho_size_unit;
 
 	int64_t ktime_second; // < One second in internal KTime units
 
 	ufbx_string original_file_path;
 	ufbx_blob raw_original_file_path;
 
 	// Space conversion method used on the scene.
 	ufbx_space_conversion space_conversion;
 
 	// Transform that has been applied to root for axis/unit conversion.
 	ufbx_quat root_rotation;
 	ufbx_real root_scale;
 
 	// Axis that the scene has been mirrored by.
 	// All geometry has been mirrored in this axis.
 	ufbx_mirror_axis mirror_axis;
 
 	// Amount geometry has been scaled.
 	// See `UFBX_SPACE_CONVERSION_MODIFY_GEOMETRY`.
 	ufbx_real geometry_scale;
 
 } ufbx_metadata;
 
 typedef enum ufbx_time_mode UFBX_ENUM_REPR {
 	UFBX_TIME_MODE_DEFAULT,
 	UFBX_TIME_MODE_120_FPS,
 	UFBX_TIME_MODE_100_FPS,
 	UFBX_TIME_MODE_60_FPS,
 	UFBX_TIME_MODE_50_FPS,
 	UFBX_TIME_MODE_48_FPS,
 	UFBX_TIME_MODE_30_FPS,
 	UFBX_TIME_MODE_30_FPS_DROP,
 	UFBX_TIME_MODE_NTSC_DROP_FRAME,
 	UFBX_TIME_MODE_NTSC_FULL_FRAME,
 	UFBX_TIME_MODE_PAL,
 	UFBX_TIME_MODE_24_FPS,
 	UFBX_TIME_MODE_1000_FPS,
 	UFBX_TIME_MODE_FILM_FULL_FRAME,
 	UFBX_TIME_MODE_CUSTOM,
 	UFBX_TIME_MODE_96_FPS,
 	UFBX_TIME_MODE_72_FPS,
 	UFBX_TIME_MODE_59_94_FPS,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_TIME_MODE)
 } ufbx_time_mode;
 
 UFBX_ENUM_TYPE(ufbx_time_mode, UFBX_TIME_MODE, UFBX_TIME_MODE_59_94_FPS);
 
 typedef enum ufbx_time_protocol UFBX_ENUM_REPR {
 	UFBX_TIME_PROTOCOL_SMPTE,
 	UFBX_TIME_PROTOCOL_FRAME_COUNT,
 	UFBX_TIME_PROTOCOL_DEFAULT,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_TIME_PROTOCOL)
 } ufbx_time_protocol;
 
 UFBX_ENUM_TYPE(ufbx_time_protocol, UFBX_TIME_PROTOCOL, UFBX_TIME_PROTOCOL_DEFAULT);
 
 typedef enum ufbx_snap_mode UFBX_ENUM_REPR {
 	UFBX_SNAP_MODE_NONE,
 	UFBX_SNAP_MODE_SNAP,
 	UFBX_SNAP_MODE_PLAY,
 	UFBX_SNAP_MODE_SNAP_AND_PLAY,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_SNAP_MODE)
 } ufbx_snap_mode;
 
 UFBX_ENUM_TYPE(ufbx_snap_mode, UFBX_SNAP_MODE, UFBX_SNAP_MODE_SNAP_AND_PLAY);
 
 // Global settings: Axes and time/unit scales
 typedef struct ufbx_scene_settings {
 	ufbx_props props;
 
 	// Mapping of X/Y/Z axes to world-space directions.
 	// HINT: Use `ufbx_load_opts.target_axes` to normalize this.
 	// NOTE: This contains the _original_ axes even if you supply `ufbx_load_opts.target_axes`.
 	ufbx_coordinate_axes axes;
 
 	// How many meters does a single world-space unit represent.
 	// FBX files usually default to centimeters, reported as `0.01` here.
 	// HINT: Use `ufbx_load_opts.target_unit_meters` to normalize this.
 	ufbx_real unit_meters;
 
 	// Frames per second the animation is defined at.
 	double frames_per_second;
 
 	ufbx_vec3 ambient_color;
 	ufbx_string default_camera;
 
 	// Animation user interface settings.
 	// HINT: Use `ufbx_scene_settings.frames_per_second` instead of interpreting these yourself.
 	ufbx_time_mode time_mode;
 	ufbx_time_protocol time_protocol;
 	ufbx_snap_mode snap_mode;
 
 	// Original settings (?)
 	ufbx_coordinate_axis original_axis_up;
 	ufbx_real original_unit_meters;
 } ufbx_scene_settings;
 
 struct ufbx_scene {
 	ufbx_metadata metadata;
 
 	// Global settings
 	ufbx_scene_settings settings;
 
 	// Node instances in the scene
 	ufbx_node *root_node;
 
 	// Default animation descriptor
 	ufbx_anim *anim;
 
 	union {
 		struct {
 			ufbx_unknown_list unknowns;
 
 			// Nodes
 			ufbx_node_list nodes;
 
 			// Node attributes (common)
 			ufbx_mesh_list meshes;
 			ufbx_light_list lights;
 			ufbx_camera_list cameras;
 			ufbx_bone_list bones;
 			ufbx_empty_list empties;
 
 			// Node attributes (curves/surfaces)
 			ufbx_line_curve_list line_curves;
 			ufbx_nurbs_curve_list nurbs_curves;
 			ufbx_nurbs_surface_list nurbs_surfaces;
 			ufbx_nurbs_trim_surface_list nurbs_trim_surfaces;
 			ufbx_nurbs_trim_boundary_list nurbs_trim_boundaries;
 
 			// Node attributes (advanced)
 			ufbx_procedural_geometry_list procedural_geometries;
 			ufbx_stereo_camera_list stereo_cameras;
 			ufbx_camera_switcher_list camera_switchers;
 			ufbx_marker_list markers;
 			ufbx_lod_group_list lod_groups;
 
 			// Deformers
 			ufbx_skin_deformer_list skin_deformers;
 			ufbx_skin_cluster_list skin_clusters;
 			ufbx_blend_deformer_list blend_deformers;
 			ufbx_blend_channel_list blend_channels;
 			ufbx_blend_shape_list blend_shapes;
 			ufbx_cache_deformer_list cache_deformers;
 			ufbx_cache_file_list cache_files;
 
 			// Materials
 			ufbx_material_list materials;
 			ufbx_texture_list textures;
 			ufbx_video_list videos;
 			ufbx_shader_list shaders;
 			ufbx_shader_binding_list shader_bindings;
 
 			// Animation
 			ufbx_anim_stack_list anim_stacks;
 			ufbx_anim_layer_list anim_layers;
 			ufbx_anim_value_list anim_values;
 			ufbx_anim_curve_list anim_curves;
 
 			// Collections
 			ufbx_display_layer_list display_layers;
 			ufbx_selection_set_list selection_sets;
 			ufbx_selection_node_list selection_nodes;
 
 			// Constraints
 			ufbx_character_list characters;
 			ufbx_constraint_list constraints;
 
 			// Audio
 			ufbx_audio_layer_list audio_layers;
 			ufbx_audio_clip_list audio_clips;
 
 			// Miscellaneous
 			ufbx_pose_list poses;
 			ufbx_metadata_object_list metadata_objects;
 		};
 
 		ufbx_element_list elements_by_type[UFBX_ELEMENT_TYPE_COUNT];
 	};
 
 	// Unique texture files referenced by the scene.
 	ufbx_texture_file_list texture_files;
 
 	// All elements and connections in the whole file
 	ufbx_element_list elements;           // < Sorted by `id`
 	ufbx_connection_list connections_src; // < Sorted by `src,src_prop`
 	ufbx_connection_list connections_dst; // < Sorted by `dst,dst_prop`
 
 	// Elements sorted by name, type
 	ufbx_name_element_list elements_by_name;
 
 	// Enabled if `ufbx_load_opts.retain_dom == true`.
 	ufbx_nullable ufbx_dom_node *dom_root;
 };
 
 // -- Curves
 
 typedef struct ufbx_curve_point {
 	bool valid;
 	ufbx_vec3 position;
 	ufbx_vec3 derivative;
 } ufbx_curve_point;
 
 typedef struct ufbx_surface_point {
 	bool valid;
 	ufbx_vec3 position;
 	ufbx_vec3 derivative_u;
 	ufbx_vec3 derivative_v;
 } ufbx_surface_point;
 
 // -- Mesh topology
 
 typedef enum ufbx_topo_flags UFBX_FLAG_REPR {
 	UFBX_TOPO_NON_MANIFOLD = 0x1, // < Edge with three or more faces
 
 	UFBX_FLAG_FORCE_WIDTH(UFBX_TOPO_FLAGS)
 } ufbx_topo_flags;
 
 typedef struct ufbx_topo_edge {
 	uint32_t index; // < Starting index of the edge, always defined
 	uint32_t next;  // < Ending index of the edge / next per-face `ufbx_topo_edge`, always defined
 	uint32_t prev;  // < Previous per-face `ufbx_topo_edge`, always defined
 	uint32_t twin;  // < `ufbx_topo_edge` on the opposite side, `UFBX_NO_INDEX` if not found
 	uint32_t face;  // < Index into `mesh->faces[]`, always defined
 	uint32_t edge;  // < Index into `mesh->edges[]`, `UFBX_NO_INDEX` if not found
 
 	ufbx_topo_flags flags;
 } ufbx_topo_edge;
 
 // Vertex data array for `ufbx_generate_indices()`.
 // NOTE: `ufbx_generate_indices()` compares the vertices using `memcmp()`, so
 // any padding should be cleared to zero.
 typedef struct ufbx_vertex_stream {
 	void *data;          // < Data pointer of shape `char[vertex_count][vertex_size]`.
 	size_t vertex_count; // < Number of vertices in this stream, for sanity checking.
 	size_t vertex_size;  // < Size of a vertex in bytes.
 } ufbx_vertex_stream;
 
 // -- Memory callbacks
 
 // You can optionally provide an allocator to ufbx, the default is to use the
 // CRT malloc/realloc/free
 
 // Allocate `size` bytes, must be at least 8 byte aligned
 typedef void *ufbx_alloc_fn(void *user, size_t size);
 
 // Reallocate `old_ptr` from `old_size` to `new_size`
 // NOTE: If omit `alloc_fn` and `free_fn` they will be translated to:
 //   `alloc(size)` -> `realloc_fn(user, NULL, 0, size)`
 //   `free_fn(ptr, size)` ->  `realloc_fn(user, ptr, size, 0)`
 typedef void *ufbx_realloc_fn(void *user, void *old_ptr, size_t old_size, size_t new_size);
 
 // Free pointer `ptr` (of `size` bytes) returned by `alloc_fn` or `realloc_fn`
 typedef void ufbx_free_fn(void *user, void *ptr, size_t size);
 
 // Free the allocator itself
 typedef void ufbx_free_allocator_fn(void *user);
 
 // Allocator callbacks and user context
 // NOTE: The allocator will be stored to the loaded scene and will be called
 // again from `ufbx_free_scene()` so make sure `user` outlives that!
 // You can use `free_allocator_fn()` to free the allocator yourself.
 typedef struct ufbx_allocator {
 	// Callback functions, see `typedef`s above for information
 	ufbx_alloc_fn *alloc_fn;
 	ufbx_realloc_fn *realloc_fn;
 	ufbx_free_fn *free_fn;
 	ufbx_free_allocator_fn *free_allocator_fn;
 	void *user;
 } ufbx_allocator;
 
 typedef struct ufbx_allocator_opts {
 	// Allocator callbacks
 	ufbx_allocator allocator;
 
 	// Maximum number of bytes to allocate before failing
 	size_t memory_limit;
 
 	// Maximum number of allocations to attempt before failing
 	size_t allocation_limit;
 
 	// Threshold to swap from batched allocations to individual ones
 	// Defaults to 1MB if set to zero
 	// NOTE: If set to `1` ufbx will allocate everything in the smallest
 	// possible chunks which may be useful for debugging (eg. ASAN)
 	size_t huge_threshold;
 
 	// Maximum size of a single allocation containing sub-allocations.
 	// Defaults to 16MB if set to zero
 	// The maximum amount of wasted memory depends on `max_chunk_size` and
 	// `huge_threshold`: each chunk can waste up to `huge_threshold` bytes
 	// internally and the last chunk might be incomplete. So for example
 	// with the defaults we can waste around 1MB/16MB = 6.25% overall plus
 	// up to 32MB due to the two incomplete blocks. The actual amounts differ
 	// slightly as the chunks start out at 4kB and double in size each time,
 	// meaning that the maximum fixed overhead (up to 32MB with defaults) is
 	// at most ~30% of the total allocation size.
 	size_t max_chunk_size;
 
 } ufbx_allocator_opts;
 
 // -- IO callbacks
 
 // Try to read up to `size` bytes to `data`, return the amount of read bytes.
 // Return `SIZE_MAX` to indicate an IO error.
 typedef size_t ufbx_read_fn(void *user, void *data, size_t size);
 
 // Skip `size` bytes in the file.
 typedef bool ufbx_skip_fn(void *user, size_t size);
 
 // Get the size of the file.
 // Return `0` if unknown, `UINT64_MAX` if error.
 typedef uint64_t ufbx_size_fn(void *user);
 
 // Close the file
 typedef void ufbx_close_fn(void *user);
 
 typedef struct ufbx_stream {
 	ufbx_read_fn *read_fn;   // < Required
 	ufbx_skip_fn *skip_fn;   // < Optional: Will use `read_fn()` if missing
 	ufbx_size_fn *size_fn;   // < Optional
 	ufbx_close_fn *close_fn; // < Optional
 
 	// Context passed to other functions
 	void *user;
 } ufbx_stream;
 
 typedef enum ufbx_open_file_type UFBX_ENUM_REPR {
 	UFBX_OPEN_FILE_MAIN_MODEL,     // < Main model file
 	UFBX_OPEN_FILE_GEOMETRY_CACHE, // < Unknown geometry cache file
 	UFBX_OPEN_FILE_OBJ_MTL,        // < .mtl material library file
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_OPEN_FILE_TYPE)
 } ufbx_open_file_type;
 
 UFBX_ENUM_TYPE(ufbx_open_file_type, UFBX_OPEN_FILE_TYPE, UFBX_OPEN_FILE_OBJ_MTL);
 
 typedef uintptr_t ufbx_open_file_context;
 
 typedef struct ufbx_open_file_info {
 	// Context that can be passed to the following functions to use a shared allocator:
 	//   ufbx_open_file_ctx()
 	//   ufbx_open_memory_ctx()
 	ufbx_open_file_context context;
 
 	// Kind of file to load.
 	ufbx_open_file_type type;
 
 	// Original filename in the file, not resolved or UTF-8 encoded.
 	// NOTE: Not necessarily NULL-terminated!
 	ufbx_blob original_filename;
 } ufbx_open_file_info;
 
 // Callback for opening an external file from the filesystem
 typedef bool ufbx_open_file_fn(void *user, ufbx_stream *stream, const char *path, size_t path_len, const ufbx_open_file_info *info);
 
 typedef struct ufbx_open_file_cb {
 	ufbx_open_file_fn *fn;
 	void *user;
 
 	UFBX_CALLBACK_IMPL(ufbx_open_file_cb, ufbx_open_file_fn, bool,
 		(void *user, ufbx_stream *stream, const char *path, size_t path_len, const ufbx_open_file_info *info),
 		(stream, path, path_len, info))
 } ufbx_open_file_cb;
 
 // Options for `ufbx_open_file()`.
 typedef struct ufbx_open_file_opts {
 	uint32_t _begin_zero;
 
 	// Allocator to allocate the memory with.
 	ufbx_allocator_opts allocator;
 
 	// The filename is guaranteed to be NULL-terminated.
 	ufbx_unsafe bool filename_null_terminated;
 
 	uint32_t _end_zero;
 } ufbx_open_file_opts;
 
 // Memory stream options
 typedef void ufbx_close_memory_fn(void *user, void *data, size_t data_size);
 
 typedef struct ufbx_close_memory_cb {
 	ufbx_close_memory_fn *fn;
 	void *user;
 
 	UFBX_CALLBACK_IMPL(ufbx_close_memory_cb, ufbx_close_memory_fn, void,
 		(void *user, void *data, size_t data_size),
 		(data, data_size))
 } ufbx_close_memory_cb;
 
 // Options for `ufbx_open_memory()`.
 typedef struct ufbx_open_memory_opts {
 	uint32_t _begin_zero;
 
 	// Allocator to allocate the memory with.
 	// NOTE: Used even if no copy is made to allocate a small metadata block.
 	ufbx_allocator_opts allocator;
 
 	// Do not copy the memory.
 	// You can use `close_cb` to free the memory when the stream is closed.
 	// NOTE: This means the provided data pointer is referenced after creating
 	// the memory stream, make sure the data stays valid until the stream is closed!
 	ufbx_unsafe bool no_copy;
 
 	// Callback to free the memory blob.
 	ufbx_close_memory_cb close_cb;
 
 	uint32_t _end_zero;
 } ufbx_open_memory_opts;
 
 // Detailed error stack frame.
 // NOTE: You must compile `ufbx.c` with `UFBX_ENABLE_ERROR_STACK` to enable the error stack.
 typedef struct ufbx_error_frame {
 	uint32_t source_line;
 	ufbx_string function;
 	ufbx_string description;
 } ufbx_error_frame;
 
 // Error causes (and `UFBX_ERROR_NONE` for no error).
 typedef enum ufbx_error_type UFBX_ENUM_REPR {
 
 	// No error, operation has been performed successfully.
 	UFBX_ERROR_NONE,
 
 	// Unspecified error, most likely caused by an invalid FBX file or a file
 	// that contains something ufbx can't handle.
 	UFBX_ERROR_UNKNOWN,
 
 	// File not found.
 	UFBX_ERROR_FILE_NOT_FOUND,
 
 	// Empty file.
 	UFBX_ERROR_EMPTY_FILE,
 
 	// External file not found.
 	// See `ufbx_load_opts.load_external_files` for more information.
 	UFBX_ERROR_EXTERNAL_FILE_NOT_FOUND,
 
 	// Out of memory (allocator returned `NULL`).
 	UFBX_ERROR_OUT_OF_MEMORY,
 
 	// `ufbx_allocator_opts.memory_limit` exhausted.
 	UFBX_ERROR_MEMORY_LIMIT,
 
 	// `ufbx_allocator_opts.allocation_limit` exhausted.
 	UFBX_ERROR_ALLOCATION_LIMIT,
 
 	// File ended abruptly.
 	UFBX_ERROR_TRUNCATED_FILE,
 
 	// IO read error.
 	// eg. returning `SIZE_MAX` from `ufbx_stream.read_fn` or stdio `ferror()` condition.
 	UFBX_ERROR_IO,
 
 	// User cancelled the loading via `ufbx_load_opts.progress_cb` returning `UFBX_PROGRESS_CANCEL`.
 	UFBX_ERROR_CANCELLED,
 
 	// Could not detect file format from file data or filename.
 	// HINT: You can supply it manually using `ufbx_load_opts.file_format` or use `ufbx_load_opts.filename`
 	// when using `ufbx_load_memory()` to let ufbx guess the format from the extension.
 	UFBX_ERROR_UNRECOGNIZED_FILE_FORMAT,
 
 	// Options struct (eg. `ufbx_load_opts`) is not cleared to zero.
 	// Make sure you initialize the structure to zero via eg.
 	//   ufbx_load_opts opts = { 0 }; // C
 	//   ufbx_load_opts opts = { }; // C++
 	UFBX_ERROR_UNINITIALIZED_OPTIONS,
 
 	// The vertex streams in `ufbx_generate_indices()` are empty.
 	UFBX_ERROR_ZERO_VERTEX_SIZE,
 
 	// Vertex stream passed to `ufbx_generate_indices()`.
 	UFBX_ERROR_TRUNCATED_VERTEX_STREAM,
 
 	// Invalid UTF-8 encountered in a file when loading with `UFBX_UNICODE_ERROR_HANDLING_ABORT_LOADING`.
 	UFBX_ERROR_INVALID_UTF8,
 
 	// Feature needed for the operation has been compiled out.
 	UFBX_ERROR_FEATURE_DISABLED,
 
 	// Attempting to tessellate an invalid NURBS object.
 	// See `ufbx_nurbs_basis.valid`.
 	UFBX_ERROR_BAD_NURBS,
 
 	// Out of bounds index in the file when loading with `UFBX_INDEX_ERROR_HANDLING_ABORT_LOADING`.
 	UFBX_ERROR_BAD_INDEX,
 
 	// Node is deeper than `ufbx_load_opts.node_depth_limit` in the hierarchy.
 	UFBX_ERROR_NODE_DEPTH_LIMIT,
 
 	// Error parsing ASCII array in a thread.
 	// Threaded ASCII parsing is slightly more strict than non-threaded, for cursed files,
 	// set `ufbx_load_opts.force_single_thread_ascii_parsing` to `true`.
 	UFBX_ERROR_THREADED_ASCII_PARSE,
 
 	// Unsafe options specified without enabling `ufbx_load_opts.allow_unsafe`.
 	UFBX_ERROR_UNSAFE_OPTIONS,
 
 	// Duplicated override property in `ufbx_create_anim()`
 	UFBX_ERROR_DUPLICATE_OVERRIDE,
 
 	// Unsupported file format version.
 	// ufbx still tries to load files with unsupported versions, see `UFBX_WARNING_UNSUPPORTED_VERSION`.
 	UFBX_ERROR_UNSUPPORTED_VERSION,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_ERROR_TYPE)
 } ufbx_error_type;
 
 UFBX_ENUM_TYPE(ufbx_error_type, UFBX_ERROR_TYPE, UFBX_ERROR_UNSUPPORTED_VERSION);
 
 // Error description with detailed stack trace
 // HINT: You can use `ufbx_format_error()` for formatting the error
 typedef struct ufbx_error {
 
 	// Type of the error, or `UFBX_ERROR_NONE` if successful.
 	ufbx_error_type type;
 
 	// Description of the error type.
 	ufbx_string description;
 
 	// Internal error stack.
 	// NOTE: You must compile `ufbx.c` with `UFBX_ENABLE_ERROR_STACK` to enable the error stack.
 	uint32_t stack_size;
 	ufbx_error_frame stack[UFBX_ERROR_STACK_MAX_DEPTH];
 
 	// Additional error information, such as missing file filename.
 	// `info` is a NULL-terminated UTF-8 string containing `info_length` bytes, excluding the trailing `'\0'`.
 	size_t info_length;
 	char info[UFBX_ERROR_INFO_LENGTH];
 
 } ufbx_error;
 
 // -- Progress callbacks
 
 // Loading progress information.
 typedef struct ufbx_progress {
 	uint64_t bytes_read;
 	uint64_t bytes_total;
 } ufbx_progress;
 
 // Progress result returned from `ufbx_progress_fn()` callback.
 // Determines whether ufbx should continue or abort the loading.
 typedef enum ufbx_progress_result UFBX_ENUM_REPR {
 
 	// Continue loading the file.
 	UFBX_PROGRESS_CONTINUE = 0x100,
 
 	// Cancel loading and fail with `UFBX_ERROR_CANCELLED`.
 	UFBX_PROGRESS_CANCEL = 0x200,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_PROGRESS_RESULT)
 } ufbx_progress_result;
 
 // Called periodically with the current progress.
 // Return `UFBX_PROGRESS_CANCEL` to cancel further processing.
 typedef ufbx_progress_result ufbx_progress_fn(void *user, const ufbx_progress *progress);
 
 typedef struct ufbx_progress_cb {
 	ufbx_progress_fn *fn;
 	void *user;
 
 	UFBX_CALLBACK_IMPL(ufbx_progress_cb, ufbx_progress_fn, ufbx_progress_result,
 		(void *user, const ufbx_progress *progress),
 		(progress))
 } ufbx_progress_cb;
 
 // -- Inflate
 
 typedef struct ufbx_inflate_input ufbx_inflate_input;
 typedef struct ufbx_inflate_retain ufbx_inflate_retain;
 
 // Source data/stream to decompress with `ufbx_inflate()`
 struct ufbx_inflate_input {
 	// Total size of the data in bytes
 	size_t total_size;
 
 	// (optional) Initial or complete data chunk
 	const void *data;
 	size_t data_size;
 
 	// (optional) Temporary buffer, defaults to 256b stack buffer
 	void *buffer;
 	size_t buffer_size;
 
 	// (optional) Streaming read function, concatenated after `data`
 	ufbx_read_fn *read_fn;
 	void *read_user;
 
 	// (optional) Progress reporting
 	ufbx_progress_cb progress_cb;
 	uint64_t progress_interval_hint; // < Bytes between progress report calls
 
 	// (optional) Change the progress scope
 	uint64_t progress_size_before;
 	uint64_t progress_size_after;
 
 	// (optional) No the DEFLATE header
 	bool no_header;
 
 	// (optional) No the Adler32 checksum
 	bool no_checksum;
 
 	// (optional) Force internal fast lookup bit amount
 	size_t internal_fast_bits;
 };
 
 // Persistent data between `ufbx_inflate()` calls
 // NOTE: You must set `initialized` to `false`, but `data` may be uninitialized
 struct ufbx_inflate_retain {
 	bool initialized;
 	uint64_t data[1024];
 };
 
 typedef enum ufbx_index_error_handling UFBX_ENUM_REPR {
 	// Clamp to a valid value.
 	UFBX_INDEX_ERROR_HANDLING_CLAMP,
 	// Set bad indices to `UFBX_NO_INDEX`.
 	// This is the recommended way if you need to deal with files with gaps in information.
 	// HINT: If you use this `ufbx_get_vertex_TYPE()` functions will return zero
 	// on invalid indices instead of failing.
 	UFBX_INDEX_ERROR_HANDLING_NO_INDEX,
 	// Fail loading entierely when encountering a bad index.
 	UFBX_INDEX_ERROR_HANDLING_ABORT_LOADING,
 	// Pass bad indices through as-is.
 	// Requires `ufbx_load_opts.allow_unsafe`.
 	// UNSAFE: Breaks any API guarantees regarding indexes being in bounds and makes
 	// `ufbx_get_vertex_TYPE()` memory-unsafe to use.
 	UFBX_INDEX_ERROR_HANDLING_UNSAFE_IGNORE,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_INDEX_ERROR_HANDLING)
 } ufbx_index_error_handling;
 
 UFBX_ENUM_TYPE(ufbx_index_error_handling, UFBX_INDEX_ERROR_HANDLING, UFBX_INDEX_ERROR_HANDLING_UNSAFE_IGNORE);
 
 typedef enum ufbx_unicode_error_handling UFBX_ENUM_REPR {
 	// Replace errors with U+FFFD "Replacement Character"
 	UFBX_UNICODE_ERROR_HANDLING_REPLACEMENT_CHARACTER,
 	// Replace errors with '_' U+5F "Low Line"
 	UFBX_UNICODE_ERROR_HANDLING_UNDERSCORE,
 	// Replace errors with '?' U+3F "Question Mark"
 	UFBX_UNICODE_ERROR_HANDLING_QUESTION_MARK,
 	// Remove errors from the output
 	UFBX_UNICODE_ERROR_HANDLING_REMOVE,
 	// Fail loading on encountering an Unicode error
 	UFBX_UNICODE_ERROR_HANDLING_ABORT_LOADING,
 	// Ignore and pass-through non-UTF-8 string data.
 	// Requires `ufbx_load_opts.allow_unsafe`.
 	// UNSAFE: Breaks API guarantee that `ufbx_string` is UTF-8 encoded.
 	UFBX_UNICODE_ERROR_HANDLING_UNSAFE_IGNORE,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_UNICODE_ERROR_HANDLING)
 } ufbx_unicode_error_handling;
 
 UFBX_ENUM_TYPE(ufbx_unicode_error_handling, UFBX_UNICODE_ERROR_HANDLING, UFBX_UNICODE_ERROR_HANDLING_UNSAFE_IGNORE);
 
 // How to handle FBX node geometry transforms.
 // FBX nodes can have "geometry transforms" that affect only the attached meshes,
 // but not the children. This is not allowed in many scene representations so
 // ufbx provides some ways to simplify them.
 // Geometry transforms can also be used to transform any other attributes such
 // as lights or cameras.
 typedef enum ufbx_geometry_transform_handling UFBX_ENUM_REPR {
 
 	// Preserve the geometry transforms as-is.
 	// To be correct for all files you have to use `ufbx_node.geometry_transform`,
 	// `ufbx_node.geometry_to_node`, or `ufbx_node.geometry_to_world` to compensate
 	// for any potential geometry transforms.
 	UFBX_GEOMETRY_TRANSFORM_HANDLING_PRESERVE,
 
 	// Add helper nodes between the nodes and geometry where needed.
 	// The created nodes have `ufbx_node.is_geometry_transform_helper` set and are
 	// named `ufbx_load_opts.geometry_transform_helper_name`.
 	UFBX_GEOMETRY_TRANSFORM_HANDLING_HELPER_NODES,
 
 	// Modify the geometry of meshes attached to nodes with geometry transforms.
 	// Will add helper nodes like `UFBX_GEOMETRY_TRANSFORM_HANDLING_HELPER_NODES` if
 	// necessary, for example if there are multiple instances of the same mesh with
 	// geometry transforms.
 	UFBX_GEOMETRY_TRANSFORM_HANDLING_MODIFY_GEOMETRY,
 
 	// Modify the geometry of meshes attached to nodes with geometry transforms.
 	// NOTE: This will not work correctly for instanced geometry.
 	UFBX_GEOMETRY_TRANSFORM_HANDLING_MODIFY_GEOMETRY_NO_FALLBACK,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_GEOMETRY_TRANSFORM_HANDLING)
 } ufbx_geometry_transform_handling;
 
 UFBX_ENUM_TYPE(ufbx_geometry_transform_handling, UFBX_GEOMETRY_TRANSFORM_HANDLING, UFBX_GEOMETRY_TRANSFORM_HANDLING_MODIFY_GEOMETRY_NO_FALLBACK);
 
 // How to handle FBX transform inherit modes.
 typedef enum ufbx_inherit_mode_handling UFBX_ENUM_REPR {
 
 	// Preserve inherit mode in `ufbx_node.inherit_mode`.
 	// NOTE: To correctly handle all scenes you would need to handle the
 	// non-standard inherit modes.
 	UFBX_INHERIT_MODE_HANDLING_PRESERVE,
 
 	// Create scale helper nodes parented to nodes that need special inheritance.
 	// Scale helper nodes will have `ufbx_node.is_scale_helper` and parents of
 	// scale helpers will have `ufbx_node.scale_helper` pointing to it.
 	UFBX_INHERIT_MODE_HANDLING_HELPER_NODES,
 
 	// Attempt to compensate for bone scale by inversely scaling children.
 	// NOTE: This only works for uniform non-animated scaling, if scale is
 	// non-uniform or animated, ufbx will add scale helpers in the same way
 	// as `UFBX_INHERIT_MODE_HANDLING_HELPER_NODES`.
 	UFBX_INHERIT_MODE_HANDLING_COMPENSATE,
 
 	// Attempt to compensate for bone scale by inversely scaling children.
 	// Will never create helper nodes.
 	UFBX_INHERIT_MODE_HANDLING_COMPENSATE_NO_FALLBACK,
 
 	// Ignore non-standard inheritance modes.
 	// Forces all nodes to have `UFBX_INHERIT_MODE_NORMAL` regardless of the
 	// inherit mode specified in the file. This can be useful for emulating
 	// results from importers/programs that don't support inherit modes.
 	UFBX_INHERIT_MODE_HANDLING_IGNORE,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_INHERIT_MODE_HANDLING)
 } ufbx_inherit_mode_handling;
 
 UFBX_ENUM_TYPE(ufbx_inherit_mode_handling, UFBX_INHERIT_MODE_HANDLING, UFBX_INHERIT_MODE_HANDLING_IGNORE);
 
 // How to handle FBX transform pivots.
 typedef enum ufbx_pivot_handling UFBX_ENUM_REPR {
 
 	// Take pivots into account when computing the transform.
 	UFBX_PIVOT_HANDLING_RETAIN,
 
 	// Translate objects to be located at their pivot.
 	// NOTE: Only applied if rotation and scaling pivots are equal.
 	// NOTE: Results in geometric translation. Use `ufbx_geometry_transform_handling`
 	// to interpret these in a standard scene graph.
 	UFBX_PIVOT_HANDLING_ADJUST_TO_PIVOT,
 
 	UFBX_ENUM_FORCE_WIDTH(UFBX_PIVOT_HANDLING)
 } ufbx_pivot_handling;
 
 UFBX_ENUM_TYPE(ufbx_pivot_handling, UFBX_PIVOT_HANDLING, UFBX_PIVOT_HANDLING_ADJUST_TO_PIVOT);
 
 typedef enum ufbx_baked_key_flags UFBX_FLAG_REPR {
 	// This keyframe represents a constant step from the left side
 	UFBX_BAKED_KEY_STEP_LEFT = 0x1,
 	// This keyframe represents a constant step from the right side
 	UFBX_BAKED_KEY_STEP_RIGHT = 0x2,
 	// This keyframe is the main part of a step
 	// Bordering either `UFBX_BAKED_KEY_STEP_LEFT` or `UFBX_BAKED_KEY_STEP_RIGHT`.
 	UFBX_BAKED_KEY_STEP_KEY = 0x4,
 	// This keyframe is a real keyframe in the source animation
 	UFBX_BAKED_KEY_KEYFRAME = 0x8,
 	// This keyframe has been reduced by maximum sample rate.
 	// See `ufbx_bake_opts.maximum_sample_rate`.
 	UFBX_BAKED_KEY_REDUCED = 0x10,
 
 	UFBX_FLAG_FORCE_WIDTH(UFBX_BAKED_KEY)
 } ufbx_baked_key_flags;
 
 typedef struct ufbx_baked_vec3 {
 	double time;                // < Time of the keyframe, in seconds
 	ufbx_vec3 value;            // < Value at `time`, can be linearly interpolated
 	ufbx_baked_key_flags flags; // < Additional information about the keyframe
 } ufbx_baked_vec3;
 
 UFBX_LIST_TYPE(ufbx_baked_vec3_list, ufbx_baked_vec3);
 
 typedef struct ufbx_baked_quat {
 	double time;                // < Time of the keyframe, in seconds
 	ufbx_quat value;            // < Value at `time`, can be (spherically) linearly interpolated
 	ufbx_baked_key_flags flags; // < Additional information about the keyframe
 } ufbx_baked_quat;
 
 UFBX_LIST_TYPE(ufbx_baked_quat_list, ufbx_baked_quat);
 
 // Baked transform animation for a single node.
 typedef struct ufbx_baked_node {
 
 	// Typed ID of the node, maps to `ufbx_scene.nodes[]`.
 	uint32_t typed_id;
 	// Element ID of the element, maps to `ufbx_scene.elements[]`.
 	uint32_t element_id;
 
 	// The translation channel has constant values for the whole animation.
 	bool constant_translation;
 	// The rotation channel has constant values for the whole animation.
 	bool constant_rotation;
 	// The scale channel has constant values for the whole animation.
 	bool constant_scale;
 
 	// Translation keys for the animation, maps to `ufbx_node.local_transform.translation`.
 	ufbx_baked_vec3_list translation_keys;
 	// Rotation keyframes, maps to `ufbx_node.local_transform.rotation`.
 	ufbx_baked_quat_list rotation_keys;
 	// Scale keyframes, maps to `ufbx_node.local_transform.scale`.
 	ufbx_baked_vec3_list scale_keys;
 
 } ufbx_baked_node;
 
 UFBX_LIST_TYPE(ufbx_baked_node_list, ufbx_baked_node);
 
 // Baked property animation.
 typedef struct ufbx_baked_prop {
 	// Name of the property, eg. `"Visibility"`.
 	ufbx_string name;
 	// The value of the property is constant for the whole animation.
 	bool constant_value;
 	// Property value keys.
 	ufbx_baked_vec3_list keys;
 } ufbx_baked_prop;
 
 UFBX_LIST_TYPE(ufbx_baked_prop_list, ufbx_baked_prop);
 
 // Baked property animation for a single element.
 typedef struct ufbx_baked_element {
 	// Element ID of the element, maps to `ufbx_scene.elements[]`.
 	uint32_t element_id;
 	// List of properties the animation modifies.
 	ufbx_baked_prop_list props;
 } ufbx_baked_element;
 
 UFBX_LIST_TYPE(ufbx_baked_element_list, ufbx_baked_element);
 
 typedef struct ufbx_baked_anim_metadata {
 	// Memory statistics
 	size_t result_memory_used;
 	size_t temp_memory_used;
 	size_t result_allocs;
 	size_t temp_allocs;
 } ufbx_baked_anim_metadata;
 
 // Animation baked into linearly interpolated keyframes.
 // See `ufbx_bake_anim()`.
 typedef struct ufbx_baked_anim {
 
 	// Nodes that are modified by the animation.
 	// Some nodes may be missing if the specified animation does not transform them.
 	// Conversely, some non-obviously animated nodes may be included as exporters
 	// often may add dummy keyframes for objects.
 	ufbx_baked_node_list nodes;
 
 	// Element properties modified by the animation.
 	ufbx_baked_element_list elements;
 
 	// Playback time range for the animation.
 	double playback_time_begin;
 	double playback_time_end;
 	double playback_duration;
 
 	// Keyframe time range.
 	double key_time_min;
 	double key_time_max;
 
 	// Additional bake information.
 	ufbx_baked_anim_metadata metadata;
 
 } ufbx_baked_anim;
 
 // -- Thread API
 
 // Internal thread pool handle.
 // Passed to `ufbx_thread_pool_run_task()` from an user thread to run ufbx tasks.
 // HINT: This context can store a user pointer via `ufbx_thread_pool_set_user_ptr()`.
 typedef uintptr_t ufbx_thread_pool_context;
 
 // Thread pool creation information from ufbx.
 typedef struct ufbx_thread_pool_info {
 	uint32_t max_concurrent_tasks;
 } ufbx_thread_pool_info;
 
 // Initialize the thread pool.
 // Return `true` on success.
 typedef bool ufbx_thread_pool_init_fn(void *user, ufbx_thread_pool_context ctx, const ufbx_thread_pool_info *info);
 
 // Run tasks `count` tasks in threads.
 // You must call `ufbx_thread_pool_run_task()` with indices `[start_index, start_index + count)`.
 // The threads are launched in batches indicated by `group`, see `UFBX_THREAD_GROUP_COUNT` for more information.
 // Ideally, you should run all the task indices in parallel within each `ufbx_thread_pool_run_fn()` call.
 typedef void ufbx_thread_pool_run_fn(void *user, ufbx_thread_pool_context ctx, uint32_t group, uint32_t start_index, uint32_t count);
 
 // Wait for previous tasks spawned in `ufbx_thread_pool_run_fn()` to finish.
 // `group` specifies the batch to wait for, `max_index` contains `start_index + count` from that group instance.
 typedef void ufbx_thread_pool_wait_fn(void *user, ufbx_thread_pool_context ctx, uint32_t group, uint32_t max_index);
 
 // Free the thread pool.
 typedef void ufbx_thread_pool_free_fn(void *user, ufbx_thread_pool_context ctx);
 
 // Thread pool interface.
 // See functions above for more information.
 //
 // Hypothetical example of calls, where `UFBX_THREAD_GROUP_COUNT=2` for simplicity:
 //
 //   run_fn(group=0, start_index=0, count=4)   -> t0 := threaded { ufbx_thread_pool_run_task(0..3) }
 //   run_fn(group=1, start_index=4, count=10)  -> t1 := threaded { ufbx_thread_pool_run_task(4..10) }
 //   wait_fn(group=0, max_index=4)             -> wait_threads(t0)
 //   run_fn(group=0, start_index=10, count=15) -> t0 := threaded { ufbx_thread_pool_run_task(10..14) }
 //   wait_fn(group=1, max_index=10)            -> wait_threads(t1)
 //   wait_fn(group=0, max_index=15)            -> wait_threads(t0)
 //
 typedef struct ufbx_thread_pool {
 	ufbx_thread_pool_init_fn *init_fn; // < Optional
 	ufbx_thread_pool_run_fn *run_fn;   // < Required
 	ufbx_thread_pool_wait_fn *wait_fn; // < Required
 	ufbx_thread_pool_free_fn *free_fn; // < Optional
 	void *user;
 } ufbx_thread_pool;
 
 // Thread pool options.
 typedef struct ufbx_thread_opts {
 
 	// Thread pool interface.
 	// HINT: You can use `extra/ufbx_os.h` to provide a thread pool.
 	ufbx_thread_pool pool;
 
 	// Maximum of tasks to have in-flight.
 	// Default: 2048
 	size_t num_tasks;
 
 	// Maximum amount of memory to use for batched threaded processing.
 	// Default: 32MB
 	// NOTE: The actual used memory usage might be higher, if there are individual tasks
 	// that rqeuire a high amount of memory.
 	size_t memory_limit;
 
 } ufbx_thread_opts;
 
 // Flags to control nanimation evaluation functions.
 typedef enum ufbx_evaluate_flags UFBX_FLAG_REPR {
 
 	// Do not extrapolate past the keyframes.
 	UFBX_EVALUATE_FLAG_NO_EXTRAPOLATION = 0x1,
 
 	UFBX_FLAG_FORCE_WIDTH(ufbx_evaluate_flags)
 } ufbx_evaluate_flags;
 
 // -- Main API
 
 // Options for `ufbx_load_file/memory/stream/stdio()`
 // NOTE: Initialize to zero with `{ 0 }` (C) or `{ }` (C++)
 typedef struct ufbx_load_opts {
 	uint32_t _begin_zero;
 
 	ufbx_allocator_opts temp_allocator;   // < Allocator used during loading
 	ufbx_allocator_opts result_allocator; // < Allocator used for the final scene
 	ufbx_thread_opts thread_opts;         // < Threading options
 
 	// Preferences
 	bool ignore_geometry;    // < Do not load geometry datsa (vertices, indices, etc)
 	bool ignore_animation;   // < Do not load animation curves
 	bool ignore_embedded;    // < Do not load embedded content
 	bool ignore_all_content; // < Do not load any content (geometry, animation, embedded)
 
 	bool evaluate_skinning; // < Evaluate skinning (see ufbx_mesh.skinned_vertices)
 	bool evaluate_caches;   // < Evaluate vertex caches (see ufbx_mesh.skinned_vertices)
 
 	// Try to open external files referenced by the main file automatically.
 	// Applies to geometry caches and .mtl files for OBJ.
 	// NOTE: This may be risky for untrusted data as the input files may contain
 	// references to arbitrary paths in the filesystem.
 	// NOTE: This only applies to files *implicitly* referenced by the scene, if
 	// you request additional files via eg. `ufbx_load_opts.obj_mtl_path` they
 	// are still loaded.
 	// NOTE: Will fail loading if any external files are not found by default, use
 	// `ufbx_load_opts.ignore_missing_external_files` to suppress this, in this case
 	// you can find the errors at `ufbx_metadata.warnings[]` as `UFBX_WARNING_MISSING_EXTERNAL_FILE`.
 	bool load_external_files;
 
 	// Don't fail loading if external files are not found.
 	bool ignore_missing_external_files;
 
 	// Don't compute `ufbx_skin_deformer` `vertices` and `weights` arrays saving
 	// a bit of memory and time if not needed
 	bool skip_skin_vertices;
 
 	// Skip computing `ufbx_mesh.material_parts[]` and `ufbx_mesh.face_group_parts[]`.
 	bool skip_mesh_parts;
 
 	// Clean-up skin weights by removing negative, zero and NAN weights.
 	bool clean_skin_weights;
 
 	// Read Blender materials as PBR values.
 	// Blender converts PBR materials to legacy FBX Phong materials in a deterministic way.
 	// If this setting is enabled, such materials will be read as `UFBX_SHADER_BLENDER_PHONG`,
 	// which means ufbx will be able to parse roughness and metallic textures.
 	bool use_blender_pbr_material;
 
 	// Don't adjust reading the FBX file depending on the detected exporter
 	bool disable_quirks;
 
 	// Don't allow partially broken FBX files to load
 	bool strict;
 
 	// Force ASCII parsing to use a single thread.
 	// The multi-threaded ASCII parsing is slightly more lenient as it ignores
 	// the self-reported size of ASCII arrays, that threaded parsing depends on.
 	bool force_single_thread_ascii_parsing;
 
 	// UNSAFE: If enabled allows using unsafe options that may fundamentally
 	// break the API guarantees.
 	ufbx_unsafe bool allow_unsafe;
 
 	// Specify how to handle broken indices.
 	ufbx_index_error_handling index_error_handling;
 
 	// Connect related elements even if they are broken. If `false` (default)
 	// `ufbx_skin_cluster` with a missing `bone` field are _not_ included in
 	// the `ufbx_skin_deformer.clusters[]` array for example.
 	bool connect_broken_elements;
 
 	// Allow nodes that are not connected in any way to the root. Conversely if
 	// disabled, all lone nodes will be parented under `ufbx_scene.root_node`.
 	bool allow_nodes_out_of_root;
 
 	// Allow meshes with no vertex position attribute.
 	// NOTE: If this is set `ufbx_mesh.vertex_position.exists` may be `false`.
 	bool allow_missing_vertex_position;
 
 	// Allow faces with zero indices.
 	bool allow_empty_faces;
 
 	// Generate vertex normals for a meshes that are missing normals.
 	// You can see if the normals have been generated from `ufbx_mesh.generated_normals`.
 	bool generate_missing_normals;
 
 	// Ignore `open_file_cb` when loading the main file.
 	bool open_main_file_with_default;
 
 	// Path separator character, defaults to '\' on Windows and '/' otherwise.
 	char path_separator;
 
 	// Maximum depth of the node hirerachy.
 	// Will fail with `UFBX_ERROR_NODE_DEPTH_LIMIT` if a node is deeper than this limit.
 	// NOTE: The default of 0 allows arbitrarily deep hierarchies. Be careful if using
 	// recursive algorithms without setting this limit.
 	uint32_t node_depth_limit;
 
 	// Estimated file size for progress reporting
 	uint64_t file_size_estimate;
 
 	// Buffer size in bytes to use for reading from files or IO callbacks
 	size_t read_buffer_size;
 
 	// Filename to use as a base for relative file paths if not specified using
 	// `ufbx_load_file()`. Use `length = SIZE_MAX` for NULL-terminated strings.
 	// `raw_filename` will be derived from this if empty.
 	ufbx_string filename;
 
 	// Raw non-UTF8 filename. Does not support NULL termination.
 	// `filename` will be derived from this if empty.
 	ufbx_blob raw_filename;
 
 	// Progress reporting
 	ufbx_progress_cb progress_cb;
 	uint64_t progress_interval_hint; // < Bytes between progress report calls
 
 	// External file callbacks (defaults to stdio.h)
 	ufbx_open_file_cb open_file_cb;
 
 	// How to handle geometry transforms in the nodes.
 	// See `ufbx_geometry_transform_handling` for an explanation.
 	ufbx_geometry_transform_handling geometry_transform_handling;
 
 	// How to handle unconventional transform inherit modes.
 	// See `ufbx_inherit_mode_handling` for an explanation.
 	ufbx_inherit_mode_handling inherit_mode_handling;
 
 	// How to handle pivots.
 	// See `ufbx_pivot_handling` for an explanation.
 	ufbx_pivot_handling pivot_handling;
 
 	// How to perform space conversion by `target_axes` and `target_unit_meters`.
 	// See `ufbx_space_conversion` for an explanation.
 	ufbx_space_conversion space_conversion;
 
 	// Axis used to mirror for conversion between left-handed and right-handed coordinates.
 	ufbx_mirror_axis handedness_conversion_axis;
 
 	// Do not change winding of faces when converting handedness.
 	bool handedness_conversion_retain_winding;
 
 	// Reverse winding of all faces.
 	// If `handedness_conversion_retain_winding` is not specified, mirrored meshes
 	// will retain their original winding.
 	bool reverse_winding;
 
 	// Apply an implicit root transformation to match axes.
 	// Used if `ufbx_coordinate_axes_valid(target_axes)`.
 	ufbx_coordinate_axes target_axes;
 
 	// Scale the scene so that one world-space unit is `target_unit_meters` meters.
 	// By default units are not scaled.
 	ufbx_real target_unit_meters;
 
 	// Target space for camera.
 	// By default FBX cameras point towards the positive X axis.
 	// Used if `ufbx_coordinate_axes_valid(target_camera_axes)`.
 	ufbx_coordinate_axes target_camera_axes;
 
 	// Target space for directed lights.
 	// By default FBX lights point towards the negative Y axis.
 	// Used if `ufbx_coordinate_axes_valid(target_light_axes)`.
 	ufbx_coordinate_axes target_light_axes;
 
 	// Name for dummy geometry transform helper nodes.
 	// See `UFBX_GEOMETRY_TRANSFORM_HANDLING_HELPER_NODES`.
 	ufbx_string geometry_transform_helper_name;
 
 	// Name for dummy scale helper nodes.
 	// See `UFBX_INHERIT_MODE_HANDLING_HELPER_NODES`.
 	ufbx_string scale_helper_name;
 
 	// Normalize vertex normals.
 	bool normalize_normals;
 
 	// Normalize tangents and bitangents.
 	bool normalize_tangents;
 
 	// Override for the root transform
 	bool use_root_transform;
 	ufbx_transform root_transform;
 
 	// Animation keyframe clamp threshold, only applies to specific interpolation modes.
 	double key_clamp_threshold;
 
 	// Specify how to handle Unicode errors in strings.
 	ufbx_unicode_error_handling unicode_error_handling;
 
 	// Retain the 'W' component of mesh normal/tangent/bitangent.
 	// See `ufbx_vertex_attrib.values_w`.
 	bool retain_vertex_attrib_w;
 
 	// Retain the raw document structure using `ufbx_dom_node`.
 	bool retain_dom;
 
 	// Force a specific file format instead of detecting it.
 	ufbx_file_format file_format;
 
 	// How far to read into the file to determine the file format.
 	// Default: 16kB
 	size_t file_format_lookahead;
 
 	// Do not attempt to detect file format from file content.
 	bool no_format_from_content;
 
 	// Do not attempt to detect file format from filename extension.
 	// ufbx primarily detects file format from the file header,
 	// this is just used as a fallback.
 	bool no_format_from_extension;
 
 	// (.obj) Try to find .mtl file with matching filename as the .obj file.
 	// Used if the file specified `mtllib` line is not found, eg. for a file called
 	// `model.obj` that contains the line `usemtl materials.mtl`, ufbx would first
 	// try to open `materials.mtl` and if that fails it tries to open `model.mtl`.
 	bool obj_search_mtl_by_filename;
 
 	// (.obj) Don't split geometry into meshes by object.
 	bool obj_merge_objects;
 
 	// (.obj) Don't split geometry into meshes by groups.
 	bool obj_merge_groups;
 
 	// (.obj) Force splitting groups even on object boundaries.
 	bool obj_split_groups;
 
 	// (.obj) Path to the .mtl file.
 	// Use `length = SIZE_MAX` for NULL-terminated strings.
 	// NOTE: This is used _instead_ of the one in the file even if not found
 	// and sidesteps `load_external_files` as it's _explicitly_ requested.
 	ufbx_string obj_mtl_path;
 
 	// (.obj) Data for the .mtl file.
 	ufbx_blob obj_mtl_data;
 
 	// The world unit in meters that .obj files are assumed to be in.
 	// .obj files do not define the working units. By default the unit scale
 	// is read as zero, and no unit conversion is performed.
 	ufbx_real obj_unit_meters;
 
 	// Coordinate space .obj files are assumed to be in.
 	// .obj files do not define the coordinate space they use. By default no
 	// coordinate space is assumed and no conversion is performed.
 	ufbx_coordinate_axes obj_axes;
 
 	uint32_t _end_zero;
 } ufbx_load_opts;
 
 // Options for `ufbx_evaluate_scene()`
 // NOTE: Initialize to zero with `{ 0 }` (C) or `{ }` (C++)
 typedef struct ufbx_evaluate_opts {
 	uint32_t _begin_zero;
 
 	ufbx_allocator_opts temp_allocator;   // < Allocator used during evaluation
 	ufbx_allocator_opts result_allocator; // < Allocator used for the final scene
 
 	bool evaluate_skinning; // < Evaluate skinning (see ufbx_mesh.skinned_vertices)
 	bool evaluate_caches;   // < Evaluate vertex caches (see ufbx_mesh.skinned_vertices)
 
 	// Evaluation flags.
 	// See `ufbx_evaluate_flags` for information.
 	uint32_t evaluate_flags;
 
 	// WARNING: Potentially unsafe! Try to open external files such as geometry caches
 	bool load_external_files;
 
 	// External file callbacks (defaults to stdio.h)
 	ufbx_open_file_cb open_file_cb;
 
 	uint32_t _end_zero;
 } ufbx_evaluate_opts;
 
 UFBX_LIST_TYPE(ufbx_const_uint32_list, const uint32_t);
 UFBX_LIST_TYPE(ufbx_const_real_list, const ufbx_real);
 
 typedef struct ufbx_prop_override_desc {
 	// Element (`ufbx_element.element_id`) to override the property from
 	uint32_t element_id;
 
 	// Property name to override.
 	ufbx_string prop_name;
 
 	// Override value, use `value.x` for scalars. `value_int` is initialized
 	// from `value.x` if zero so keep `value` zeroed even if you don't need it!
 	ufbx_vec4 value;
 	ufbx_string value_str;
 	int64_t value_int;
 } ufbx_prop_override_desc;
 
 UFBX_LIST_TYPE(ufbx_const_prop_override_desc_list, const ufbx_prop_override_desc);
 
 UFBX_LIST_TYPE(ufbx_const_transform_override_list, const ufbx_transform_override);
 
 typedef struct ufbx_anim_opts {
 	uint32_t _begin_zero;
 
 	// Animation layers indices.
 	// Corresponding to `ufbx_scene.anim_layers[]`, aka `ufbx_anim_layer.typed_id`.
 	ufbx_const_uint32_list layer_ids;
 
 	// Override layer weights, parallel to `ufbx_anim_opts.layer_ids[]`.
 	ufbx_const_real_list override_layer_weights;
 
 	// Property overrides.
 	// These allow you to override FBX properties, such as 'UFBX_Lcl_Rotation`.
 	ufbx_const_prop_override_desc_list prop_overrides;
 
 	// Transform overrides.
 	// These allow you to override individual nodes' `ufbx_node.local_transform`.
 	ufbx_const_transform_override_list transform_overrides;
 
 	// Ignore connected properties
 	bool ignore_connections;
 
 	ufbx_allocator_opts result_allocator; // < Allocator used to create the `ufbx_anim`
 
 	uint32_t _end_zero;
 } ufbx_anim_opts;
 
 // Specifies how to handle stepped tangents.
 typedef enum ufbx_bake_step_handling UFBX_ENUM_REPR {
 
 	// One millisecond default step duration, with potential extra slack for converting to `float`.
 	UFBX_BAKE_STEP_HANDLING_DEFAULT,
 
 	// Use a custom interpolation duration for the constant step.
 	// See `ufbx_bake_opts.step_custom_duration` and optionally `ufbx_bake_opts.step_custom_epsilon`.
 	UFBX_BAKE_STEP_HANDLING_CUSTOM_DURATION,
 
 	// Stepped keyframes are represented as keyframes at the exact same time.
 	// Use flags `UFBX_BAKED_KEY_STEP_LEFT` and `UFBX_BAKED_KEY_STEP_RIGHT` to differentiate
 	// between the primary key and edge limits.
 	UFBX_BAKE_STEP_HANDLING_IDENTICAL_TIME,
 
 	// Represent stepped keyframe times as the previous/next representable `double` value.
 	// Using this and robust linear interpolation will handle stepped tangents correctly
 	// without having to look at the key flags.
 	// NOTE: Casting these values to `float` or otherwise modifying them can collapse
 	// the keyframes to have the identical time.
 	UFBX_BAKE_STEP_HANDLING_ADJACENT_DOUBLE,
 
 	// Treat all stepped tangents as linearly interpolated.
 	UFBX_BAKE_STEP_HANDLING_IGNORE,
 
 	UFBX_ENUM_FORCE_WIDTH(ufbx_bake_step_handling)
 } ufbx_bake_step_handling;
 
 UFBX_ENUM_TYPE(ufbx_bake_step_handling, UFBX_BAKE_STEP_HANDLING, UFBX_BAKE_STEP_HANDLING_IGNORE);
 
 typedef struct ufbx_bake_opts {
 	uint32_t _begin_zero;
 
 	ufbx_allocator_opts temp_allocator;   // < Allocator used during loading
 	ufbx_allocator_opts result_allocator; // < Allocator used for the final baked animation
 
 	// Move the keyframe times to start from zero regardless of the animation start time.
 	// For example, for an animation spanning between frames [30, 60] will be moved to
 	// [0, 30] in the baked animation.
 	// NOTE: This is in general not equivalent to subtracting `ufbx_anim.time_begin`
 	// from each keyframe, as this trimming is done exactly using internal FBX ticks.
 	bool trim_start_time;
 
 	// Samples per second to use for resampling non-linear animation.
 	// Default: 30
 	double resample_rate;
 
 	// Minimum sample rate to not resample.
 	// Many exporters resample animation by default. To avoid double-resampling
 	// keyframe rates higher or equal to this will not be resampled.
 	// Default: 19.5
 	double minimum_sample_rate;
 
 	// Maximum sample rate to use, this will remove keys if they are too close together.
 	// Default: unlimited
 	double maximum_sample_rate;
 
 	// Bake the raw versions of properties related to transforms.
 	bool bake_transform_props;
 
 	// Do not bake node transforms.
 	bool skip_node_transforms;
 
 	// Do not resample linear rotation keyframes.
 	// FBX interpolates rotation in Euler angles, so this might cause incorrect interpolation.
 	bool no_resample_rotation;
 
 	// Ignore layer weight animation.
 	bool ignore_layer_weight_animation;
 
 	// Maximum number of segments to generate from one keyframe.
 	// Default: 32
 	size_t max_keyframe_segments;
 
 	// How to handle stepped tangents.
 	ufbx_bake_step_handling step_handling;
 
 	// Interpolation duration used by `UFBX_BAKE_STEP_HANDLING_CUSTOM_DURATION`.
 	double step_custom_duration;
 
 	// Interpolation epsilon used by `UFBX_BAKE_STEP_HANDLING_CUSTOM_DURATION`.
 	// Defined as the minimum fractional decrease/increase in key time, ie.
 	// `time / (1.0 + step_custom_epsilon)` and `time * (1.0 + step_custom_epsilon)`.
 	double step_custom_epsilon;
 
 	// Flags passed to animation evaluation functions.
 	// See `ufbx_evaluate_flags`.
 	uint32_t evaluate_flags;
 
 	// Enable key reduction.
 	bool key_reduction_enabled;
 
 	// Enable key reduction for non-constant rotations.
 	// Assumes rotations will be interpolated using a spherical linear interpolation at runtime.
 	bool key_reduction_rotation;
 
 	// Threshold for reducing keys for linear segments.
 	// Default `0.000001`, use negative to disable.
 	double key_reduction_threshold;
 
 	// Maximum passes over the keys to reduce.
 	// Every pass can potentially halve the the amount of keys.
 	// Default: `4`
 	size_t key_reduction_passes;
 
 	uint32_t _end_zero;
 } ufbx_bake_opts;
 
 // Options for `ufbx_tessellate_nurbs_curve()`
 // NOTE: Initialize to zero with `{ 0 }` (C) or `{ }` (C++)
 typedef struct ufbx_tessellate_curve_opts {
 	uint32_t _begin_zero;
 
 	ufbx_allocator_opts temp_allocator;   // < Allocator used during tessellation
 	ufbx_allocator_opts result_allocator; // < Allocator used for the final line curve
 
 	// How many segments tessellate each span in `ufbx_nurbs_basis.spans`.
 	size_t span_subdivision;
 
 	uint32_t _end_zero;
 } ufbx_tessellate_curve_opts;
 
 // Options for `ufbx_tessellate_nurbs_surface()`
 // NOTE: Initialize to zero with `{ 0 }` (C) or `{ }` (C++)
 typedef struct ufbx_tessellate_surface_opts {
 	uint32_t _begin_zero;
 
 	ufbx_allocator_opts temp_allocator;   // < Allocator used during tessellation
 	ufbx_allocator_opts result_allocator; // < Allocator used for the final mesh
 
 	// How many segments tessellate each span in `ufbx_nurbs_basis.spans`.
 	// NOTE: Default is `4`, _not_ `ufbx_nurbs_surface.span_subdivision_u/v` as that
 	// would make it easy to create an FBX file with an absurdly high subdivision
 	// rate (similar to mesh subdivision). Please enforce copy the value yourself
 	// enforcing whatever limits you deem reasonable.
 	size_t span_subdivision_u;
 	size_t span_subdivision_v;
 
 	// Skip computing `ufbx_mesh.material_parts[]`
 	bool skip_mesh_parts;
 
 	uint32_t _end_zero;
 } ufbx_tessellate_surface_opts;
 
 // Options for `ufbx_subdivide_mesh()`
 // NOTE: Initialize to zero with `{ 0 }` (C) or `{ }` (C++)
 typedef struct ufbx_subdivide_opts {
 	uint32_t _begin_zero;
 
 	ufbx_allocator_opts temp_allocator;   // < Allocator used during subdivision
 	ufbx_allocator_opts result_allocator; // < Allocator used for the final mesh
 
 	ufbx_subdivision_boundary boundary;
 	ufbx_subdivision_boundary uv_boundary;
 
 	// Do not generate normals
 	bool ignore_normals;
 
 	// Interpolate existing normals using the subdivision rules
 	// instead of generating new normals
 	bool interpolate_normals;
 
 	// Subdivide also tangent attributes
 	bool interpolate_tangents;
 
 	// Map subdivided vertices into weighted original vertices.
 	// NOTE: May be O(n^2) if `max_source_vertices` is not specified!
 	bool evaluate_source_vertices;
 
 	// Limit source vertices per subdivided vertex.
 	size_t max_source_vertices;
 
 	// Calculate bone influences over subdivided vertices (if applicable).
 	// NOTE: May be O(n^2) if `max_skin_weights` is not specified!
 	bool evaluate_skin_weights;
 
 	// Limit bone influences per subdivided vertex.
 	size_t max_skin_weights;
 
 	// Index of the skin deformer to use for `evaluate_skin_weights`.
 	size_t skin_deformer_index;
 
 	uint32_t _end_zero;
 } ufbx_subdivide_opts;
 
 // Options for `ufbx_load_geometry_cache()`
 // NOTE: Initialize to zero with `{ 0 }` (C) or `{ }` (C++)
 typedef struct ufbx_geometry_cache_opts {
 	uint32_t _begin_zero;
 
 	ufbx_allocator_opts temp_allocator;   // < Allocator used during loading
 	ufbx_allocator_opts result_allocator; // < Allocator used for the final scene
 
 	// External file callbacks (defaults to stdio.h)
 	ufbx_open_file_cb open_file_cb;
 
 	// FPS value for converting frame times to seconds
 	double frames_per_second;
 
 	// Axis to mirror the geometry by.
 	ufbx_mirror_axis mirror_axis;
 
 	// Enable scaling `scale_factor` all geometry by.
 	bool use_scale_factor;
 
 	// Factor to scale the geometry by.
 	ufbx_real scale_factor;
 
 	uint32_t _end_zero;
 } ufbx_geometry_cache_opts;
 
 // Options for `ufbx_read_geometry_cache_TYPE()`
 // NOTE: Initialize to zero with `{ 0 }` (C) or `{ }` (C++)
 typedef struct ufbx_geometry_cache_data_opts {
 	uint32_t _begin_zero;
 
 	// External file callbacks (defaults to stdio.h)
 	ufbx_open_file_cb open_file_cb;
 
 	bool additive;
 	bool use_weight;
 	ufbx_real weight;
 
 	// Ignore scene transform.
 	bool ignore_transform;
 
 	uint32_t _end_zero;
 } ufbx_geometry_cache_data_opts;
 
 typedef struct ufbx_panic {
 	bool did_panic;
 	size_t message_length;
 	char message[UFBX_PANIC_MESSAGE_LENGTH];
 } ufbx_panic;
 
 // -- API
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 // Various zero/empty/identity values
 ufbx_abi_data const ufbx_string ufbx_empty_string;
 ufbx_abi_data const ufbx_blob ufbx_empty_blob;
 ufbx_abi_data const ufbx_matrix ufbx_identity_matrix;
 ufbx_abi_data const ufbx_transform ufbx_identity_transform;
 ufbx_abi_data const ufbx_vec2 ufbx_zero_vec2;
 ufbx_abi_data const ufbx_vec3 ufbx_zero_vec3;
 ufbx_abi_data const ufbx_vec4 ufbx_zero_vec4;
 ufbx_abi_data const ufbx_quat ufbx_identity_quat;
 
 // Commonly used coordinate axes.
 ufbx_abi_data const ufbx_coordinate_axes ufbx_axes_right_handed_y_up;
 ufbx_abi_data const ufbx_coordinate_axes ufbx_axes_right_handed_z_up;
 ufbx_abi_data const ufbx_coordinate_axes ufbx_axes_left_handed_y_up;
 ufbx_abi_data const ufbx_coordinate_axes ufbx_axes_left_handed_z_up;
 
 // Sizes of element types. eg `sizeof(ufbx_node)`
 ufbx_abi_data const size_t ufbx_element_type_size[UFBX_ELEMENT_TYPE_COUNT];
 
 // Version of the source file, comparable to `UFBX_HEADER_VERSION`
 ufbx_abi_data const uint32_t ufbx_source_version;
 
 
 // Practically always `true` (see below), if not you need to be careful with threads.
 //
 // Guaranteed to be `true` in _any_ of the following conditions:
 // - ufbx.c has been compiled using: GCC / Clang / MSVC / ICC / EMCC / TCC
 // - ufbx.c has been compiled as C++11 or later
 // - ufbx.c has been compiled as C11 or later with `<stdatomic.h>` support
 //
 // If `false` you can't call the following functions concurrently:
 //   ufbx_evaluate_scene()
 //   ufbx_free_scene()
 //   ufbx_subdivide_mesh()
 //   ufbx_tessellate_nurbs_surface()
 //   ufbx_free_mesh()
 ufbx_abi bool ufbx_is_thread_safe(void);
 
 // Load a scene from a `size` byte memory buffer at `data`
 ufbx_abi ufbx_scene *ufbx_load_memory(
 	const void *data, size_t data_size,
 	const ufbx_load_opts *opts, ufbx_error *error);
 
 // Load a scene by opening a file named `filename`
 ufbx_abi ufbx_scene *ufbx_load_file(
 	const char *filename,
 	const ufbx_load_opts *opts, ufbx_error *error);
 ufbx_abi ufbx_scene *ufbx_load_file_len(
 	const char *filename, size_t filename_len,
 	const ufbx_load_opts *opts, ufbx_error *error);
 
 // Load a scene by reading from an `FILE *file` stream
 // NOTE: `file` is passed as a `void` pointer to avoid including <stdio.h>
 ufbx_abi ufbx_scene *ufbx_load_stdio(
 	void *file,
 	const ufbx_load_opts *opts, ufbx_error *error);
 
 // Load a scene by reading from an `FILE *file` stream with a prefix
 // NOTE: `file` is passed as a `void` pointer to avoid including <stdio.h>
 ufbx_abi ufbx_scene *ufbx_load_stdio_prefix(
 	void *file,
 	const void *prefix, size_t prefix_size,
 	const ufbx_load_opts *opts, ufbx_error *error);
 
 // Load a scene from a user-specified stream
 ufbx_abi ufbx_scene *ufbx_load_stream(
 	const ufbx_stream *stream,
 	const ufbx_load_opts *opts, ufbx_error *error);
 
 // Load a scene from a user-specified stream with a prefix
 ufbx_abi ufbx_scene *ufbx_load_stream_prefix(
 	const ufbx_stream *stream,
 	const void *prefix, size_t prefix_size,
 	const ufbx_load_opts *opts, ufbx_error *error);
 
 // Free a previously loaded or evaluated scene
 ufbx_abi void ufbx_free_scene(ufbx_scene *scene);
 
 // Increment `scene` refcount
 ufbx_abi void ufbx_retain_scene(ufbx_scene *scene);
 
 // Format a textual description of `error`.
 // Always produces a NULL-terminated string to `char dst[dst_size]`, truncating if
 // necessary. Returns the number of characters written not including the NULL terminator.
 ufbx_abi size_t ufbx_format_error(char *dst, size_t dst_size, const ufbx_error *error);
 
 // Query
 
 // Find a property `name` from `props`, returns `NULL` if not found.
 // Searches through `ufbx_props.defaults` as well.
 ufbx_abi ufbx_prop *ufbx_find_prop_len(const ufbx_props *props, const char *name, size_t name_len);
 ufbx_abi ufbx_prop *ufbx_find_prop(const ufbx_props *props, const char *name);
 
 // Utility functions for finding the value of a property, returns `def` if not found.
 // NOTE: For `ufbx_string` you need to ensure the lifetime of the default is
 // sufficient as no copy is made.
 ufbx_abi ufbx_real ufbx_find_real_len(const ufbx_props *props, const char *name, size_t name_len, ufbx_real def);
 ufbx_abi ufbx_real ufbx_find_real(const ufbx_props *props, const char *name, ufbx_real def);
 ufbx_abi ufbx_vec3 ufbx_find_vec3_len(const ufbx_props *props, const char *name, size_t name_len, ufbx_vec3 def);
 ufbx_abi ufbx_vec3 ufbx_find_vec3(const ufbx_props *props, const char *name, ufbx_vec3 def);
 ufbx_abi int64_t ufbx_find_int_len(const ufbx_props *props, const char *name, size_t name_len, int64_t def);
 ufbx_abi int64_t ufbx_find_int(const ufbx_props *props, const char *name, int64_t def);
 ufbx_abi bool ufbx_find_bool_len(const ufbx_props *props, const char *name, size_t name_len, bool def);
 ufbx_abi bool ufbx_find_bool(const ufbx_props *props, const char *name, bool def);
 ufbx_abi ufbx_string ufbx_find_string_len(const ufbx_props *props, const char *name, size_t name_len, ufbx_string def);
 ufbx_abi ufbx_string ufbx_find_string(const ufbx_props *props, const char *name, ufbx_string def);
 ufbx_abi ufbx_blob ufbx_find_blob_len(const ufbx_props *props, const char *name, size_t name_len, ufbx_blob def);
 ufbx_abi ufbx_blob ufbx_find_blob(const ufbx_props *props, const char *name, ufbx_blob def);
 
 // Find property in `props` with concatenated `parts[num_parts]`.
 ufbx_abi ufbx_prop *ufbx_find_prop_concat(const ufbx_props *props, const ufbx_string *parts, size_t num_parts);
 
 // Get an element connected to a property.
 ufbx_abi ufbx_element *ufbx_get_prop_element(const ufbx_element *element, const ufbx_prop *prop, ufbx_element_type type);
 
 // Find an element connected to a property by name.
 ufbx_abi ufbx_element *ufbx_find_prop_element_len(const ufbx_element *element, const char *name, size_t name_len, ufbx_element_type type);
 ufbx_abi ufbx_element *ufbx_find_prop_element(const ufbx_element *element, const char *name, ufbx_element_type type);
 
 // Find any element of type `type` in `scene` by `name`.
 // For example if you want to find `ufbx_material` named `Mat`:
 //   (ufbx_material*)ufbx_find_element(scene, UFBX_ELEMENT_MATERIAL, "Mat");
 ufbx_abi ufbx_element *ufbx_find_element_len(const ufbx_scene *scene, ufbx_element_type type, const char *name, size_t name_len);
 ufbx_abi ufbx_element *ufbx_find_element(const ufbx_scene *scene, ufbx_element_type type, const char *name);
 
 // Find node in `scene` by `name` (shorthand for `ufbx_find_element(UFBX_ELEMENT_NODE)`).
 ufbx_abi ufbx_node *ufbx_find_node_len(const ufbx_scene *scene, const char *name, size_t name_len);
 ufbx_abi ufbx_node *ufbx_find_node(const ufbx_scene *scene, const char *name);
 
 // Find an animation stack in `scene` by `name` (shorthand for `ufbx_find_element(UFBX_ELEMENT_ANIM_STACK)`)
 ufbx_abi ufbx_anim_stack *ufbx_find_anim_stack_len(const ufbx_scene *scene, const char *name, size_t name_len);
 ufbx_abi ufbx_anim_stack *ufbx_find_anim_stack(const ufbx_scene *scene, const char *name);
 
 // Find a material in `scene` by `name` (shorthand for `ufbx_find_element(UFBX_ELEMENT_MATERIAL)`).
 ufbx_abi ufbx_material *ufbx_find_material_len(const ufbx_scene *scene, const char *name, size_t name_len);
 ufbx_abi ufbx_material *ufbx_find_material(const ufbx_scene *scene, const char *name);
 
 // Find a single animated property `prop` of `element` in `layer`.
 // Returns `NULL` if not found.
 ufbx_abi ufbx_anim_prop *ufbx_find_anim_prop_len(const ufbx_anim_layer *layer, const ufbx_element *element, const char *prop, size_t prop_len);
 ufbx_abi ufbx_anim_prop *ufbx_find_anim_prop(const ufbx_anim_layer *layer, const ufbx_element *element, const char *prop);
 
 // Find all animated properties of `element` in `layer`.
 ufbx_abi ufbx_anim_prop_list ufbx_find_anim_props(const ufbx_anim_layer *layer, const ufbx_element *element);
 
 // Get a matrix that transforms normals in the same way as Autodesk software.
 // NOTE: The resulting normals are slightly incorrect as this function deliberately
 // inverts geometric transformation wrong. For better results use
 // `ufbx_matrix_for_normals(&node->geometry_to_world)`.
 ufbx_abi ufbx_matrix ufbx_get_compatible_matrix_for_normals(const ufbx_node *node);
 
 // Utility
 
 // Decompress a DEFLATE compressed buffer.
 // Returns the decompressed size or a negative error code (see source for details).
 // NOTE: You must supply a valid `retain` with `ufbx_inflate_retain.initialized == false`
 // but the rest can be uninitialized.
 ufbx_abi ptrdiff_t ufbx_inflate(void *dst, size_t dst_size, const ufbx_inflate_input *input, ufbx_inflate_retain *retain);
 
 // Same as `ufbx_open_file()` but compatible with the callback in `ufbx_open_file_fn`.
 // The `user` parameter is actually not used here.
 ufbx_abi bool ufbx_default_open_file(void *user, ufbx_stream *stream, const char *path, size_t path_len, const ufbx_open_file_info *info);
 
 // Open a `ufbx_stream` from a file.
 // Use `path_len == SIZE_MAX` for NULL terminated string.
 ufbx_abi bool ufbx_open_file(ufbx_stream *stream, const char *path, size_t path_len, const ufbx_open_file_opts *opts, ufbx_error *error);
 ufbx_unsafe ufbx_abi bool ufbx_open_file_ctx(ufbx_stream *stream, ufbx_open_file_context ctx, const char *path, size_t path_len, const ufbx_open_file_opts *opts, ufbx_error *error);
 
 // NOTE: Uses the default ufbx allocator!
 ufbx_abi bool ufbx_open_memory(ufbx_stream *stream, const void *data, size_t data_size, const ufbx_open_memory_opts *opts, ufbx_error *error);
 ufbx_unsafe ufbx_abi bool ufbx_open_memory_ctx(ufbx_stream *stream, ufbx_open_file_context ctx, const void *data, size_t data_size, const ufbx_open_memory_opts *opts, ufbx_error *error);
 
 // Animation evaluation
 
 // Evaluate a single animation `curve` at a `time`.
 // Returns `default_value` only if `curve == NULL` or it has no keyframes.
 ufbx_abi ufbx_real ufbx_evaluate_curve(const ufbx_anim_curve *curve, double time, ufbx_real default_value);
 ufbx_abi ufbx_real ufbx_evaluate_curve_flags(const ufbx_anim_curve *curve, double time, ufbx_real default_value, uint32_t flags);
 
 // Evaluate a value from bundled animation curves.
 ufbx_abi ufbx_real ufbx_evaluate_anim_value_real(const ufbx_anim_value *anim_value, double time);
 ufbx_abi ufbx_vec3 ufbx_evaluate_anim_value_vec3(const ufbx_anim_value *anim_value, double time);
 ufbx_abi ufbx_real ufbx_evaluate_anim_value_real_flags(const ufbx_anim_value *anim_value, double time, uint32_t flags);
 ufbx_abi ufbx_vec3 ufbx_evaluate_anim_value_vec3_flags(const ufbx_anim_value *anim_value, double time, uint32_t flags);
 
 // Evaluate an animated property `name` from `element` at `time`.
 // NOTE: If the property is not found it will have the flag `UFBX_PROP_FLAG_NOT_FOUND`.
 ufbx_abi ufbx_prop ufbx_evaluate_prop_len(const ufbx_anim *anim, const ufbx_element *element, const char *name, size_t name_len, double time);
 ufbx_abi ufbx_prop ufbx_evaluate_prop(const ufbx_anim *anim, const ufbx_element *element, const char *name, double time);
 ufbx_abi ufbx_prop ufbx_evaluate_prop_len_flags(const ufbx_anim *anim, const ufbx_element *element, const char *name, size_t name_len, double time, uint32_t flags);
 ufbx_abi ufbx_prop ufbx_evaluate_prop_flags(const ufbx_anim *anim, const ufbx_element *element, const char *name, double time, uint32_t flags);
 
 // Evaluate all _animated_ properties of `element`.
 // HINT: This function returns an `ufbx_props` structure with the original properties as
 // `ufbx_props.defaults`. This lets you use `ufbx_find_prop/value()` for the results.
 ufbx_abi ufbx_props ufbx_evaluate_props(const ufbx_anim *anim, const ufbx_element *element, double time, ufbx_prop *buffer, size_t buffer_size);
 ufbx_abi ufbx_props ufbx_evaluate_props_flags(const ufbx_anim *anim, const ufbx_element *element, double time, ufbx_prop *buffer, size_t buffer_size, uint32_t flags);
 
 // Flags to control `ufbx_evaluate_transform_flags()`.
 typedef enum ufbx_transform_flags UFBX_FLAG_REPR {
 
 	// Ignore parent scale helper.
 	UFBX_TRANSFORM_FLAG_IGNORE_SCALE_HELPER = 0x1,
 
 	// Ignore componentwise scale.
 	// Note that if you don't specify this, ufbx will have to potentially
 	// evaluate the entire parent chain in the worst case.
 	UFBX_TRANSFORM_FLAG_IGNORE_COMPONENTWISE_SCALE = 0x2,
 
 	// Require explicit components
 	UFBX_TRANSFORM_FLAG_EXPLICIT_INCLUDES = 0x4,
 
 	// If `UFBX_TRANSFORM_FLAG_EXPLICIT_INCLUDES`: Evaluate `ufbx_transform.translation`.
 	UFBX_TRANSFORM_FLAG_INCLUDE_TRANSLATION = 0x10,
 	// If `UFBX_TRANSFORM_FLAG_EXPLICIT_INCLUDES`: Evaluate `ufbx_transform.rotation`.
 	UFBX_TRANSFORM_FLAG_INCLUDE_ROTATION = 0x20,
 	// If `UFBX_TRANSFORM_FLAG_EXPLICIT_INCLUDES`: Evaluate `ufbx_transform.scale`.
 	UFBX_TRANSFORM_FLAG_INCLUDE_SCALE = 0x40,
 
 	// Do not extrapolate keyframes.
 	// See `UFBX_EVALUATE_FLAG_NO_EXTRAPOLATION`.
 	UFBX_TRANSFORM_FLAG_NO_EXTRAPOLATION = 0x80,
 
 	UFBX_FLAG_FORCE_WIDTH(UFBX_TRANSFORM_FLAGS)
 } ufbx_transform_flags;
 
 // Evaluate the animated transform of a node given a time.
 // The returned transform is the local transform of the node (ie. relative to the parent),
 // comparable to `ufbx_node.local_transform`.
 ufbx_abi ufbx_transform ufbx_evaluate_transform(const ufbx_anim *anim, const ufbx_node *node, double time);
 ufbx_abi ufbx_transform ufbx_evaluate_transform_flags(const ufbx_anim *anim, const ufbx_node *node, double time, uint32_t flags);
 
 // Evaluate the blend shape weight of a blend channel.
 // NOTE: Return value uses `1.0` for full weight, instead of `100.0` that the internal property `UFBX_Weight` uses.
 ufbx_abi ufbx_real ufbx_evaluate_blend_weight(const ufbx_anim *anim, const ufbx_blend_channel *channel, double time);
 ufbx_abi ufbx_real ufbx_evaluate_blend_weight_flags(const ufbx_anim *anim, const ufbx_blend_channel *channel, double time, uint32_t flags);
 
 // Evaluate the whole `scene` at a specific `time` in the animation `anim`.
 // The returned scene behaves as if it had been exported at a specific time
 // in the specified animation, except that animated elements' properties contain
 // only the animated values, the original ones are in `props->defaults`.
 //
 // NOTE: The returned scene refers to the original `scene` so the original
 // scene cannot be freed until all evaluated scenes are freed.
 ufbx_abi ufbx_scene *ufbx_evaluate_scene(const ufbx_scene *scene, const ufbx_anim *anim, double time, const ufbx_evaluate_opts *opts, ufbx_error *error);
 
 // Create a custom animation descriptor.
 // `ufbx_anim_opts` is used to specify animation layers and weights.
 // HINT: You can also leave `ufbx_anim_opts.layer_ids[]` empty and only specify
 // overrides to evaluate the scene with different properties or local transforms.
 ufbx_abi ufbx_anim *ufbx_create_anim(const ufbx_scene *scene, const ufbx_anim_opts *opts, ufbx_error *error);
 
 // Free an animation returned by `ufbx_create_anim()`.
 ufbx_abi void ufbx_free_anim(ufbx_anim *anim);
 
 // Increase the animation reference count.
 ufbx_abi void ufbx_retain_anim(ufbx_anim *anim);
 
 // Animation baking
 
 // "Bake" an animation to linearly interpolated keyframes.
 // Composites the FBX transformation chain into quaternion rotations.
 ufbx_abi ufbx_baked_anim *ufbx_bake_anim(const ufbx_scene *scene, const ufbx_anim *anim, const ufbx_bake_opts *opts, ufbx_error *error);
 
 ufbx_abi void ufbx_retain_baked_anim(ufbx_baked_anim *bake);
 ufbx_abi void ufbx_free_baked_anim(ufbx_baked_anim *bake);
 
 ufbx_abi ufbx_baked_node *ufbx_find_baked_node_by_typed_id(ufbx_baked_anim *bake, uint32_t typed_id);
 ufbx_abi ufbx_baked_node *ufbx_find_baked_node(ufbx_baked_anim *bake, ufbx_node *node);
 
 ufbx_abi ufbx_baked_element *ufbx_find_baked_element_by_element_id(ufbx_baked_anim *bake, uint32_t element_id);
 ufbx_abi ufbx_baked_element *ufbx_find_baked_element(ufbx_baked_anim *bake, ufbx_element *element);
 
 // Evaluate baked animation `keyframes` at `time`.
 // Internally linearly interpolates between two adjacent keyframes.
 // Handles stepped tangents cleanly, which is not strictly necessary for custom interpolation.
 ufbx_abi ufbx_vec3 ufbx_evaluate_baked_vec3(ufbx_baked_vec3_list keyframes, double time);
 
 // Evaluate baked animation `keyframes` at `time`.
 // Internally spherically interpolates (`ufbx_quat_slerp()`) between two adjacent keyframes.
 // Handles stepped tangents cleanly, which is not strictly necessary for custom interpolation.
 ufbx_abi ufbx_quat ufbx_evaluate_baked_quat(ufbx_baked_quat_list keyframes, double time);
 
 // Poses
 
 // Retrieve the bone pose for `node`.
 // Returns `NULL` if the pose does not contain `node`.
 ufbx_abi ufbx_bone_pose *ufbx_get_bone_pose(const ufbx_pose *pose, const ufbx_node *node);
 
 // Materials
 
 // Find a texture for a given material FBX property.
 ufbx_abi ufbx_texture *ufbx_find_prop_texture_len(const ufbx_material *material, const char *name, size_t name_len);
 ufbx_abi ufbx_texture *ufbx_find_prop_texture(const ufbx_material *material, const char *name);
 
 // Find a texture for a given shader property.
 ufbx_abi ufbx_string ufbx_find_shader_prop_len(const ufbx_shader *shader, const char *name, size_t name_len);
 ufbx_abi ufbx_string ufbx_find_shader_prop(const ufbx_shader *shader, const char *name);
 
 // Map from a shader property to material property.
 ufbx_abi ufbx_shader_prop_binding_list ufbx_find_shader_prop_bindings_len(const ufbx_shader *shader, const char *name, size_t name_len);
 ufbx_abi ufbx_shader_prop_binding_list ufbx_find_shader_prop_bindings(const ufbx_shader *shader, const char *name);
 
 // Find an input in a shader texture.
 ufbx_abi ufbx_shader_texture_input *ufbx_find_shader_texture_input_len(const ufbx_shader_texture *shader, const char *name, size_t name_len);
 ufbx_abi ufbx_shader_texture_input *ufbx_find_shader_texture_input(const ufbx_shader_texture *shader, const char *name);
 
 // Math
 
 // Returns `true` if `axes` forms a valid coordinate space.
 ufbx_abi bool ufbx_coordinate_axes_valid(ufbx_coordinate_axes axes);
 
 // Vector math utility functions.
 ufbx_abi ufbx_vec3 ufbx_vec3_normalize(ufbx_vec3 v);
 
 // Quaternion math utility functions.
 ufbx_abi ufbx_real ufbx_quat_dot(ufbx_quat a, ufbx_quat b);
 ufbx_abi ufbx_quat ufbx_quat_mul(ufbx_quat a, ufbx_quat b);
 ufbx_abi ufbx_quat ufbx_quat_normalize(ufbx_quat q);
 ufbx_abi ufbx_quat ufbx_quat_fix_antipodal(ufbx_quat q, ufbx_quat reference);
 ufbx_abi ufbx_quat ufbx_quat_slerp(ufbx_quat a, ufbx_quat b, ufbx_real t);
 ufbx_abi ufbx_vec3 ufbx_quat_rotate_vec3(ufbx_quat q, ufbx_vec3 v);
 ufbx_abi ufbx_vec3 ufbx_quat_to_euler(ufbx_quat q, ufbx_rotation_order order);
 ufbx_abi ufbx_quat ufbx_euler_to_quat(ufbx_vec3 v, ufbx_rotation_order order);
 
 // Matrix math utility functions.
 ufbx_abi ufbx_matrix ufbx_matrix_mul(const ufbx_matrix *a, const ufbx_matrix *b);
 ufbx_abi ufbx_real ufbx_matrix_determinant(const ufbx_matrix *m);
 ufbx_abi ufbx_matrix ufbx_matrix_invert(const ufbx_matrix *m);
 
 // Get a matrix that can be used to transform geometry normals.
 // NOTE: You must normalize the normals after transforming them with this matrix,
 // eg. using `ufbx_vec3_normalize()`.
 // NOTE: This function flips the normals if the determinant is negative.
 ufbx_abi ufbx_matrix ufbx_matrix_for_normals(const ufbx_matrix *m);
 
 // Matrix transformation utilities.
 ufbx_abi ufbx_vec3 ufbx_transform_position(const ufbx_matrix *m, ufbx_vec3 v);
 ufbx_abi ufbx_vec3 ufbx_transform_direction(const ufbx_matrix *m, ufbx_vec3 v);
 
 // Conversions between `ufbx_matrix` and `ufbx_transform`.
 ufbx_abi ufbx_matrix ufbx_transform_to_matrix(const ufbx_transform *t);
 ufbx_abi ufbx_transform ufbx_matrix_to_transform(const ufbx_matrix *m);
 
 // Skinning
 
 // Get a matrix representing the deformation for a single vertex.
 // Returns `fallback` if the vertex is not skinned.
 ufbx_abi ufbx_matrix ufbx_catch_get_skin_vertex_matrix(ufbx_panic *panic, const ufbx_skin_deformer *skin, size_t vertex, const ufbx_matrix *fallback);
 ufbx_inline ufbx_matrix ufbx_get_skin_vertex_matrix(const ufbx_skin_deformer *skin, size_t vertex, const ufbx_matrix *fallback) {
 	return ufbx_catch_get_skin_vertex_matrix(NULL, skin, vertex, fallback);
 }
 
 // Resolve the index into `ufbx_blend_shape.position_offsets[]` given a vertex.
 // Returns `UFBX_NO_INDEX` if the vertex is not included in the blend shape.
 ufbx_abi uint32_t ufbx_get_blend_shape_offset_index(const ufbx_blend_shape *shape, size_t vertex);
 
 // Get the offset for a given vertex in the blend shape.
 // Returns `ufbx_zero_vec3` if the vertex is not a included in the blend shape.
 ufbx_abi ufbx_vec3 ufbx_get_blend_shape_vertex_offset(const ufbx_blend_shape *shape, size_t vertex);
 
 // Get the _current_ blend offset given a blend deformer.
 // NOTE: This depends on the current animated blend weight of the deformer.
 ufbx_abi ufbx_vec3 ufbx_get_blend_vertex_offset(const ufbx_blend_deformer *blend, size_t vertex);
 
 // Apply the blend shape with `weight` to given vertices.
 ufbx_abi void ufbx_add_blend_shape_vertex_offsets(const ufbx_blend_shape *shape, ufbx_vec3 *vertices, size_t num_vertices, ufbx_real weight);
 
 // Apply the blend deformer with `weight` to given vertices.
 // NOTE: This depends on the current animated blend weight of the deformer.
 ufbx_abi void ufbx_add_blend_vertex_offsets(const ufbx_blend_deformer *blend, ufbx_vec3 *vertices, size_t num_vertices, ufbx_real weight);
 
 // Curves/surfaces
 
 // Low-level utility to evaluate NURBS the basis functions.
 ufbx_abi size_t ufbx_evaluate_nurbs_basis(const ufbx_nurbs_basis *basis, ufbx_real u, ufbx_real *weights, size_t num_weights, ufbx_real *derivatives, size_t num_derivatives);
 
 // Evaluate a point on a NURBS curve given the parameter `u`.
 ufbx_abi ufbx_curve_point ufbx_evaluate_nurbs_curve(const ufbx_nurbs_curve *curve, ufbx_real u);
 
 // Evaluate a point on a NURBS surface given the parameter `u` and `v`.
 ufbx_abi ufbx_surface_point ufbx_evaluate_nurbs_surface(const ufbx_nurbs_surface *surface, ufbx_real u, ufbx_real v);
 
 // Tessellate a NURBS curve into a polyline.
 ufbx_abi ufbx_line_curve *ufbx_tessellate_nurbs_curve(const ufbx_nurbs_curve *curve, const ufbx_tessellate_curve_opts *opts, ufbx_error *error);
 
 // Tessellate a NURBS surface into a mesh.
 ufbx_abi ufbx_mesh *ufbx_tessellate_nurbs_surface(const ufbx_nurbs_surface *surface, const ufbx_tessellate_surface_opts *opts, ufbx_error *error);
 
 // Free a line returned by `ufbx_tessellate_nurbs_curve()`.
 ufbx_abi void ufbx_free_line_curve(ufbx_line_curve *curve);
 
 // Increase the refcount of the line.
 ufbx_abi void ufbx_retain_line_curve(ufbx_line_curve *curve);
 
 // Mesh Topology
 
 // Find the face that contains a given `index`.
 // Returns `UFBX_NO_INDEX` if out of bounds.
 ufbx_abi uint32_t ufbx_find_face_index(ufbx_mesh *mesh, size_t index);
 
 // Triangulate a mesh face, returning the number of triangles.
 // NOTE: You need to space for `(face.num_indices - 2) * 3 - 1` indices!
 // HINT: Using `ufbx_mesh.max_face_triangles * 3` is always safe.
 ufbx_abi uint32_t ufbx_catch_triangulate_face(ufbx_panic *panic, uint32_t *indices, size_t num_indices, const ufbx_mesh *mesh, ufbx_face face);
 ufbx_abi uint32_t ufbx_triangulate_face(uint32_t *indices, size_t num_indices, const ufbx_mesh *mesh, ufbx_face face);
 
 // Generate the half-edge representation of `mesh` to `topo[mesh->num_indices]`
 ufbx_abi void ufbx_catch_compute_topology(ufbx_panic *panic, const ufbx_mesh *mesh, ufbx_topo_edge *topo, size_t num_topo);
 ufbx_abi void ufbx_compute_topology(const ufbx_mesh *mesh, ufbx_topo_edge *topo, size_t num_topo);
 
 // Get the next/previous edge around a vertex
 // NOTE: Does not return the half-edge on the opposite side (ie. `topo[index].twin`)
 
 // Get the next half-edge in `topo`.
 ufbx_abi uint32_t ufbx_catch_topo_next_vertex_edge(ufbx_panic *panic, const ufbx_topo_edge *topo, size_t num_topo, uint32_t index);
 ufbx_abi uint32_t ufbx_topo_next_vertex_edge(const ufbx_topo_edge *topo, size_t num_topo, uint32_t index);
 
 // Get the previous half-edge in `topo`.
 ufbx_abi uint32_t ufbx_catch_topo_prev_vertex_edge(ufbx_panic *panic, const ufbx_topo_edge *topo, size_t num_topo, uint32_t index);
 ufbx_abi uint32_t ufbx_topo_prev_vertex_edge(const ufbx_topo_edge *topo, size_t num_topo, uint32_t index);
 
 // Calculate a normal for a given face.
 // The returned normal is weighted by face area.
 ufbx_abi ufbx_vec3 ufbx_catch_get_weighted_face_normal(ufbx_panic *panic, const ufbx_vertex_vec3 *positions, ufbx_face face);
 ufbx_abi ufbx_vec3 ufbx_get_weighted_face_normal(const ufbx_vertex_vec3 *positions, ufbx_face face);
 
 // Generate indices for normals from the topology.
 // Respects smoothing groups.
 ufbx_abi size_t ufbx_catch_generate_normal_mapping(ufbx_panic *panic, const ufbx_mesh *mesh,
 	const ufbx_topo_edge *topo, size_t num_topo,
 	uint32_t *normal_indices, size_t num_normal_indices, bool assume_smooth);
 ufbx_abi size_t ufbx_generate_normal_mapping(const ufbx_mesh *mesh,
 	const ufbx_topo_edge *topo, size_t num_topo,
 	uint32_t *normal_indices, size_t num_normal_indices, bool assume_smooth);
 
 // Compute normals given normal indices.
 // You can use `ufbx_generate_normal_mapping()` to generate the normal indices.
 ufbx_abi void ufbx_catch_compute_normals(ufbx_panic *panic, const ufbx_mesh *mesh, const ufbx_vertex_vec3 *positions,
 	const uint32_t *normal_indices, size_t num_normal_indices,
 	ufbx_vec3 *normals, size_t num_normals);
 ufbx_abi void ufbx_compute_normals(const ufbx_mesh *mesh, const ufbx_vertex_vec3 *positions,
 	const uint32_t *normal_indices, size_t num_normal_indices,
 	ufbx_vec3 *normals, size_t num_normals);
 
 // Subdivide a mesh using the Catmull-Clark subdivision `level` times.
 ufbx_abi ufbx_mesh *ufbx_subdivide_mesh(const ufbx_mesh *mesh, size_t level, const ufbx_subdivide_opts *opts, ufbx_error *error);
 
 // Free a mesh returned from `ufbx_subdivide_mesh()` or `ufbx_tessellate_nurbs_surface()`.
 ufbx_abi void ufbx_free_mesh(ufbx_mesh *mesh);
 
 // Increase the mesh reference count.
 ufbx_abi void ufbx_retain_mesh(ufbx_mesh *mesh);
 
 // Geometry caches
 
 // Load geometry cache information from a file.
 // As geometry caches can be massive, this does not actually read the data, but
 // only seeks through the files to form the metadata.
 ufbx_abi ufbx_geometry_cache *ufbx_load_geometry_cache(
 	const char *filename,
 	const ufbx_geometry_cache_opts *opts, ufbx_error *error);
 ufbx_abi ufbx_geometry_cache *ufbx_load_geometry_cache_len(
 	const char *filename, size_t filename_len,
 	const ufbx_geometry_cache_opts *opts, ufbx_error *error);
 
 // Free a geometry cache returned from `ufbx_load_geometry_cache()`.
 ufbx_abi void ufbx_free_geometry_cache(ufbx_geometry_cache *cache);
 // Increase the geometry cache reference count.
 ufbx_abi void ufbx_retain_geometry_cache(ufbx_geometry_cache *cache);
 
 // Read a frame from a geometry cache.
 ufbx_abi size_t ufbx_read_geometry_cache_real(const ufbx_cache_frame *frame, ufbx_real *data, size_t num_data, const ufbx_geometry_cache_data_opts *opts);
 ufbx_abi size_t ufbx_read_geometry_cache_vec3(const ufbx_cache_frame *frame, ufbx_vec3 *data, size_t num_data, const ufbx_geometry_cache_data_opts *opts);
 // Sample the a geometry cache channel, linearly blending between adjacent frames.
 ufbx_abi size_t ufbx_sample_geometry_cache_real(const ufbx_cache_channel *channel, double time, ufbx_real *data, size_t num_data, const ufbx_geometry_cache_data_opts *opts);
 ufbx_abi size_t ufbx_sample_geometry_cache_vec3(const ufbx_cache_channel *channel, double time, ufbx_vec3 *data, size_t num_data, const ufbx_geometry_cache_data_opts *opts);
 
 // DOM
 
 // Find a DOM node given a name.
 ufbx_abi ufbx_dom_node *ufbx_dom_find_len(const ufbx_dom_node *parent, const char *name, size_t name_len);
 ufbx_abi ufbx_dom_node *ufbx_dom_find(const ufbx_dom_node *parent, const char *name);
 
 // Utility
 
 // Generate an index buffer for a flat vertex buffer.
 // `streams` specifies one or more vertex data arrays, each stream must contain `num_indices` vertices.
 // This function compacts the data within `streams` in-place, writing the deduplicated indices to `indices`.
 ufbx_abi size_t ufbx_generate_indices(const ufbx_vertex_stream *streams, size_t num_streams, uint32_t *indices, size_t num_indices, const ufbx_allocator_opts *allocator, ufbx_error *error);
 
 // Thread pool
 
 // Run a single thread pool task.
 // See `ufbx_thread_pool_run_fn` for more information.
 ufbx_unsafe ufbx_abi void ufbx_thread_pool_run_task(ufbx_thread_pool_context ctx, uint32_t index);
 
 // Get or set an arbitrary user pointer for the thread pool context.
 // `ufbx_thread_pool_get_user_ptr()` returns `NULL` if unset.
 ufbx_unsafe ufbx_abi void ufbx_thread_pool_set_user_ptr(ufbx_thread_pool_context ctx, void *user_ptr);
 ufbx_unsafe ufbx_abi void *ufbx_thread_pool_get_user_ptr(ufbx_thread_pool_context ctx);
 
 // -- Inline API
 
 // Utility functions for reading geometry data for a single index.
 ufbx_abi ufbx_real ufbx_catch_get_vertex_real(ufbx_panic *panic, const ufbx_vertex_real *v, size_t index);
 ufbx_abi ufbx_vec2 ufbx_catch_get_vertex_vec2(ufbx_panic *panic, const ufbx_vertex_vec2 *v, size_t index);
 ufbx_abi ufbx_vec3 ufbx_catch_get_vertex_vec3(ufbx_panic *panic, const ufbx_vertex_vec3 *v, size_t index);
 ufbx_abi ufbx_vec4 ufbx_catch_get_vertex_vec4(ufbx_panic *panic, const ufbx_vertex_vec4 *v, size_t index);
 
 // Utility functions for reading geometry data for a single index.
 ufbx_inline ufbx_real ufbx_get_vertex_real(const ufbx_vertex_real *v, size_t index) { ufbx_assert(index < v->indices.count); return v->values.data[(int32_t)v->indices.data[index]]; }
 ufbx_inline ufbx_vec2 ufbx_get_vertex_vec2(const ufbx_vertex_vec2 *v, size_t index) { ufbx_assert(index < v->indices.count); return v->values.data[(int32_t)v->indices.data[index]]; }
 ufbx_inline ufbx_vec3 ufbx_get_vertex_vec3(const ufbx_vertex_vec3 *v, size_t index) { ufbx_assert(index < v->indices.count); return v->values.data[(int32_t)v->indices.data[index]]; }
 ufbx_inline ufbx_vec4 ufbx_get_vertex_vec4(const ufbx_vertex_vec4 *v, size_t index) { ufbx_assert(index < v->indices.count); return v->values.data[(int32_t)v->indices.data[index]]; }
 
 ufbx_abi ufbx_real ufbx_catch_get_vertex_w_vec3(ufbx_panic *panic, const ufbx_vertex_vec3 *v, size_t index);
 ufbx_inline ufbx_real ufbx_get_vertex_w_vec3(const ufbx_vertex_vec3 *v, size_t index) { ufbx_assert(index < v->indices.count); return v->values_w.count > 0 ? v->values_w.data[(int32_t)v->indices.data[index]] : 0.0f; }
 
 // Functions for converting an untyped `ufbx_element` to a concrete type.
 // Returns `NULL` if the element is not that type.
 ufbx_abi ufbx_unknown *ufbx_as_unknown(const ufbx_element *element);
 ufbx_abi ufbx_node *ufbx_as_node(const ufbx_element *element);
 ufbx_abi ufbx_mesh *ufbx_as_mesh(const ufbx_element *element);
 ufbx_abi ufbx_light *ufbx_as_light(const ufbx_element *element);
 ufbx_abi ufbx_camera *ufbx_as_camera(const ufbx_element *element);
 ufbx_abi ufbx_bone *ufbx_as_bone(const ufbx_element *element);
 ufbx_abi ufbx_empty *ufbx_as_empty(const ufbx_element *element);
 ufbx_abi ufbx_line_curve *ufbx_as_line_curve(const ufbx_element *element);
 ufbx_abi ufbx_nurbs_curve *ufbx_as_nurbs_curve(const ufbx_element *element);
 ufbx_abi ufbx_nurbs_surface *ufbx_as_nurbs_surface(const ufbx_element *element);
 ufbx_abi ufbx_nurbs_trim_surface *ufbx_as_nurbs_trim_surface(const ufbx_element *element);
 ufbx_abi ufbx_nurbs_trim_boundary *ufbx_as_nurbs_trim_boundary(const ufbx_element *element);
 ufbx_abi ufbx_procedural_geometry *ufbx_as_procedural_geometry(const ufbx_element *element);
 ufbx_abi ufbx_stereo_camera *ufbx_as_stereo_camera(const ufbx_element *element);
 ufbx_abi ufbx_camera_switcher *ufbx_as_camera_switcher(const ufbx_element *element);
 ufbx_abi ufbx_marker *ufbx_as_marker(const ufbx_element *element);
 ufbx_abi ufbx_lod_group *ufbx_as_lod_group(const ufbx_element *element);
 ufbx_abi ufbx_skin_deformer *ufbx_as_skin_deformer(const ufbx_element *element);
 ufbx_abi ufbx_skin_cluster *ufbx_as_skin_cluster(const ufbx_element *element);
 ufbx_abi ufbx_blend_deformer *ufbx_as_blend_deformer(const ufbx_element *element);
 ufbx_abi ufbx_blend_channel *ufbx_as_blend_channel(const ufbx_element *element);
 ufbx_abi ufbx_blend_shape *ufbx_as_blend_shape(const ufbx_element *element);
 ufbx_abi ufbx_cache_deformer *ufbx_as_cache_deformer(const ufbx_element *element);
 ufbx_abi ufbx_cache_file *ufbx_as_cache_file(const ufbx_element *element);
 ufbx_abi ufbx_material *ufbx_as_material(const ufbx_element *element);
 ufbx_abi ufbx_texture *ufbx_as_texture(const ufbx_element *element);
 ufbx_abi ufbx_video *ufbx_as_video(const ufbx_element *element);
 ufbx_abi ufbx_shader *ufbx_as_shader(const ufbx_element *element);
 ufbx_abi ufbx_shader_binding *ufbx_as_shader_binding(const ufbx_element *element);
 ufbx_abi ufbx_anim_stack *ufbx_as_anim_stack(const ufbx_element *element);
 ufbx_abi ufbx_anim_layer *ufbx_as_anim_layer(const ufbx_element *element);
 ufbx_abi ufbx_anim_value *ufbx_as_anim_value(const ufbx_element *element);
 ufbx_abi ufbx_anim_curve *ufbx_as_anim_curve(const ufbx_element *element);
 ufbx_abi ufbx_display_layer *ufbx_as_display_layer(const ufbx_element *element);
 ufbx_abi ufbx_selection_set *ufbx_as_selection_set(const ufbx_element *element);
 ufbx_abi ufbx_selection_node *ufbx_as_selection_node(const ufbx_element *element);
 ufbx_abi ufbx_character *ufbx_as_character(const ufbx_element *element);
 ufbx_abi ufbx_constraint *ufbx_as_constraint(const ufbx_element *element);
 ufbx_abi ufbx_audio_layer *ufbx_as_audio_layer(const ufbx_element *element);
 ufbx_abi ufbx_audio_clip *ufbx_as_audio_clip(const ufbx_element *element);
 ufbx_abi ufbx_pose *ufbx_as_pose(const ufbx_element *element);
 ufbx_abi ufbx_metadata_object *ufbx_as_metadata_object(const ufbx_element *element);
 
 #ifdef __cplusplus
 }
 #endif
 
 // bindgen-disable
 
 #if UFBX_CPP11
 
 struct ufbx_string_view {
 	const char *data;
 	size_t length;
 
 	ufbx_string_view() : data(nullptr), length(0) { }
 	ufbx_string_view(const char *data_, size_t length_) : data(data_), length(length_) { }
 	UFBX_CONVERSION_TO_IMPL(ufbx_string_view)
 };
 
 ufbx_inline ufbx_scene *ufbx_load_file(ufbx_string_view filename, const ufbx_load_opts *opts, ufbx_error *error) { return ufbx_load_file_len(filename.data, filename.length, opts, error); }
 ufbx_inline ufbx_prop *ufbx_find_prop(const ufbx_props *props, ufbx_string_view name) { return ufbx_find_prop_len(props, name.data, name.length); }
 ufbx_inline ufbx_real ufbx_find_real(const ufbx_props *props, ufbx_string_view name, ufbx_real def) { return ufbx_find_real_len(props, name.data, name.length, def); }
 ufbx_inline ufbx_vec3 ufbx_find_vec3(const ufbx_props *props, ufbx_string_view name, ufbx_vec3 def) { return ufbx_find_vec3_len(props, name.data, name.length, def); }
 ufbx_inline int64_t ufbx_find_int(const ufbx_props *props, ufbx_string_view name, int64_t def) { return ufbx_find_int_len(props, name.data, name.length, def); }
 ufbx_inline bool ufbx_find_bool(const ufbx_props *props, ufbx_string_view name, bool def) { return ufbx_find_bool_len(props, name.data, name.length, def); }
 ufbx_inline ufbx_string ufbx_find_string(const ufbx_props *props, ufbx_string_view name, ufbx_string def) { return ufbx_find_string_len(props, name.data, name.length, def); }
 ufbx_inline ufbx_blob ufbx_find_blob(const ufbx_props *props, ufbx_string_view name, ufbx_blob def) { return ufbx_find_blob_len(props, name.data, name.length, def); }
 ufbx_inline ufbx_element *ufbx_find_prop_element(const ufbx_element *element, ufbx_string_view name, ufbx_element_type type) { return ufbx_find_prop_element_len(element, name.data, name.length, type); }
 ufbx_inline ufbx_element *ufbx_find_element(const ufbx_scene *scene, ufbx_element_type type, ufbx_string_view name) { return ufbx_find_element_len(scene, type, name.data, name.length); }
 ufbx_inline ufbx_node *ufbx_find_node(const ufbx_scene *scene, ufbx_string_view name) { return ufbx_find_node_len(scene, name.data, name.length); }
 ufbx_inline ufbx_anim_stack *ufbx_find_anim_stack(const ufbx_scene *scene, ufbx_string_view name) { return ufbx_find_anim_stack_len(scene, name.data, name.length); }
 ufbx_inline ufbx_material *ufbx_find_material(const ufbx_scene *scene, ufbx_string_view name) { return ufbx_find_material_len(scene, name.data, name.length); }
 ufbx_inline ufbx_anim_prop *ufbx_find_anim_prop(const ufbx_anim_layer *layer, const ufbx_element *element, ufbx_string_view prop) { return ufbx_find_anim_prop_len(layer, element, prop.data, prop.length); }
 ufbx_inline ufbx_prop ufbx_evaluate_prop(const ufbx_anim *anim, const ufbx_element *element, ufbx_string_view name, double time) { return ufbx_evaluate_prop_len(anim, element, name.data, name.length, time); }
 ufbx_inline ufbx_texture *ufbx_find_prop_texture(const ufbx_material *material, ufbx_string_view name) { return ufbx_find_prop_texture_len(material, name.data, name.length); }
 ufbx_inline ufbx_string ufbx_find_shader_prop(const ufbx_shader *shader, ufbx_string_view name) { return ufbx_find_shader_prop_len(shader, name.data, name.length); }
 ufbx_inline ufbx_shader_prop_binding_list ufbx_find_shader_prop_bindings(const ufbx_shader *shader, ufbx_string_view name) { return ufbx_find_shader_prop_bindings_len(shader, name.data, name.length); }
 ufbx_inline ufbx_shader_texture_input *ufbx_find_shader_texture_input(const ufbx_shader_texture *shader, ufbx_string_view name) { return ufbx_find_shader_texture_input_len(shader, name.data, name.length); }
 ufbx_inline ufbx_geometry_cache *ufbx_load_geometry_cache(ufbx_string_view filename, const ufbx_geometry_cache_opts *opts, ufbx_error *error) { return ufbx_load_geometry_cache_len(filename.data, filename.length, opts, error); }
 ufbx_inline ufbx_dom_node *ufbx_dom_find(const ufbx_dom_node *parent, ufbx_string_view name) { return ufbx_dom_find_len(parent, name.data, name.length); }
 
 #endif
 
 #if UFBX_CPP11
 
 template <typename T>
 struct ufbx_type_traits { enum { valid = 0 }; };
 
 template<> struct ufbx_type_traits<ufbx_scene> {
 	enum { valid = 1 };
 	static void retain(ufbx_scene *ptr) { ufbx_retain_scene(ptr); }
 	static void free(ufbx_scene *ptr) { ufbx_free_scene(ptr); }
 };
 
 template<> struct ufbx_type_traits<ufbx_mesh> {
 	enum { valid = 1 };
 	static void retain(ufbx_mesh *ptr) { ufbx_retain_mesh(ptr); }
 	static void free(ufbx_mesh *ptr) { ufbx_free_mesh(ptr); }
 };
 
 template<> struct ufbx_type_traits<ufbx_line_curve> {
 	enum { valid = 1 };
 	static void retain(ufbx_line_curve *ptr) { ufbx_retain_line_curve(ptr); }
 	static void free(ufbx_line_curve *ptr) { ufbx_free_line_curve(ptr); }
 };
 
 template<> struct ufbx_type_traits<ufbx_geometry_cache> {
 	enum { valid = 1 };
 	static void retain(ufbx_geometry_cache *ptr) { ufbx_retain_geometry_cache(ptr); }
 	static void free(ufbx_geometry_cache *ptr) { ufbx_free_geometry_cache(ptr); }
 };
 
 template<> struct ufbx_type_traits<ufbx_anim> {
 	enum { valid = 1 };
 	static void retain(ufbx_anim *ptr) { ufbx_retain_anim(ptr); }
 	static void free(ufbx_anim *ptr) { ufbx_free_anim(ptr); }
 };
 
 template<> struct ufbx_type_traits<ufbx_baked_anim> {
 	enum { valid = 1 };
 	static void retain(ufbx_baked_anim *ptr) { ufbx_retain_baked_anim(ptr); }
 	static void free(ufbx_baked_anim *ptr) { ufbx_free_baked_anim(ptr); }
 };
 
 class ufbx_deleter {
 public:
 	template <typename T>
 	void operator()(T *ptr) const {
 		static_assert(ufbx_type_traits<T>::valid, "ufbx_deleter() unsupported for type");
 		ufbx_type_traits<T>::free(ptr);
 	}
 };
 
 // RAII wrapper over refcounted ufbx types.
 
 // Behaves like `std::unique_ptr<T>`.
 template <typename T>
 class ufbx_unique_ptr {
 	T *ptr;
 	using traits = ufbx_type_traits<T>;
 	static_assert(ufbx_type_traits<T>::valid, "ufbx_unique_ptr unsupported for type");
 public:
 	ufbx_unique_ptr() noexcept : ptr(nullptr) { }
 	explicit ufbx_unique_ptr(T *ptr_) noexcept : ptr(ptr_) { }
 	ufbx_unique_ptr(ufbx_unique_ptr &&ref) noexcept : ptr(ref.ptr) { ref.ptr = nullptr; }
 	~ufbx_unique_ptr() { traits::free(ptr); }
 
 	ufbx_unique_ptr &operator=(ufbx_unique_ptr &&ref) noexcept {
 		if (&ref == this) return *this;
 		ptr = ref.ptr;
 		ref.ptr = nullptr;
 		return *this;
 	}
 
 	void reset(T *new_ptr=nullptr) noexcept {
 		traits::free(ptr);
 		ptr = new_ptr;
 	}
 
 	void swap(ufbx_unique_ptr &ref) noexcept {
 		T *tmp = ptr;
 		ptr = ref.ptr;
 		ref.ptr = tmp;
 	}
 
 	T &operator*() const noexcept { return *ptr; }
 	T *operator->() const noexcept { return ptr; }
 	T *get() const noexcept { return ptr; }
 	explicit operator bool() const noexcept { return ptr != nullptr; }
 };
 
 // Behaves like `std::shared_ptr<T>` except uses ufbx's internal reference counting,
 // so it is half the size of a standard `shared_ptr` but might be marginally slower.
 template <typename T>
 class ufbx_shared_ptr {
 	T *ptr;
 	using traits = ufbx_type_traits<T>;
 	static_assert(ufbx_type_traits<T>::valid, "ufbx_shared_ptr unsupported for type");
 public:
 
 	ufbx_shared_ptr() noexcept : ptr(nullptr) { }
 	explicit ufbx_shared_ptr(T *ptr_) noexcept : ptr(ptr_) { }
 	ufbx_shared_ptr(const ufbx_shared_ptr &ref) noexcept : ptr(ref.ptr) { traits::retain(ref.ptr); }
 	ufbx_shared_ptr(ufbx_shared_ptr &&ref) noexcept : ptr(ref.ptr) { ref.ptr = nullptr; }
 	~ufbx_shared_ptr() { traits::free(ptr); }
 
 	ufbx_shared_ptr &operator=(const ufbx_shared_ptr &ref) noexcept {
 		if (&ref == this) return *this;
 		traits::free(ptr);
 		traits::retain(ref.ptr);
 		ptr = ref.ptr;
 		return *this;
 	}
 
 	ufbx_shared_ptr &operator=(ufbx_shared_ptr &&ref) noexcept {
 		if (&ref == this) return *this;
 		ptr = ref.ptr;
 		ref.ptr = nullptr;
 		return *this;
 	}
 
 	void reset(T *new_ptr=nullptr) noexcept {
 		traits::free(ptr);
 		ptr = new_ptr;
 	}
 
 	void swap(ufbx_shared_ptr &ref) noexcept {
 		T *tmp = ptr;
 		ptr = ref.ptr;
 		ref.ptr = tmp;
 	}
 
 	T &operator*() const noexcept { return *ptr; }
 	T *operator->() const noexcept { return ptr; }
 	T *get() const noexcept { return ptr; }
 	explicit operator bool() const noexcept { return ptr != nullptr; }
 };
 
 #endif
 // bindgen-enable
 
 // -- Properties
 
 // Names of common properties in `ufbx_props`.
 // Some of these differ from ufbx interpretations.
 
 // Local translation.
 // Used by: `ufbx_node`
 #define UFBX_Lcl_Translation "Lcl Translation"
 
 // Local rotation expressed in Euler degrees.
 // Used by: `ufbx_node`
 // The rotation order is defined by the `UFBX_RotationOrder` property.
 #define UFBX_Lcl_Rotation "Lcl Rotation"
 
 // Local scaling factor, 3D vector.
 // Used by: `ufbx_node`
 #define UFBX_Lcl_Scaling "Lcl Scaling"
 
 // Euler rotation interpretation, used by `UFBX_Lcl_Rotation`.
 // Used by: `ufbx_node`, enum value `ufbx_rotation_order`.
 #define UFBX_RotationOrder "RotationOrder"
 
 // Scaling pivot: point around which scaling is performed.
 // Used by: `ufbx_node`.
 #define UFBX_ScalingPivot "ScalingPivot"
 
 // Scaling pivot: point around which rotation is performed.
 // Used by: `ufbx_node`.
 #define UFBX_RotationPivot "RotationPivot"
 
 // Scaling offset: translation added after scaling is performed.
 // Used by: `ufbx_node`.
 #define UFBX_ScalingOffset "ScalingOffset"
 
 // Rotation offset: translation added after rotation is performed.
 // Used by: `ufbx_node`.
 #define UFBX_RotationOffset "RotationOffset"
 
 // Pre-rotation: Rotation applied _after_ `UFBX_Lcl_Rotation`.
 // Used by: `ufbx_node`.
 // Affected by `UFBX_RotationPivot` but not `UFBX_RotationOrder`.
 #define UFBX_PreRotation "PreRotation"
 
 // Post-rotation: Rotation applied _before_ `UFBX_Lcl_Rotation`.
 // Used by: `ufbx_node`.
 // Affected by `UFBX_RotationPivot` but not `UFBX_RotationOrder`.
 #define UFBX_PostRotation "PostRotation"
 
 // Controls whether the node should be displayed or not.
 // Used by: `ufbx_node`.
 #define UFBX_Visibility "Visibility"
 
 // Weight of an animation layer in percentage (100.0 being full).
 // Used by: `ufbx_anim_layer`.
 #define UFBX_Weight "Weight"
 
 // Blend shape deformation weight (100.0 being full).
 // Used by: `ufbx_blend_channel`.
 #define UFBX_DeformPercent "DeformPercent"
 
 #if defined(_MSC_VER)
 	#pragma warning(pop)
 #elif defined(__clang__)
 	#pragma clang diagnostic pop
 #elif defined(__GNUC__)
 	#pragma GCC diagnostic pop
 #endif
 
 #endif