Updated cgltf.

2026-02-21 06:13:07 +01:00 · 2023-06-24 09:54:01 -07:00
parent 0418da686a
commit 6a858f17da
2 changed files with 271 additions and 23 deletions
--- a/3rdparty/cgltf/cgltf.h
+++ b/3rdparty/cgltf/cgltf.h
@@ -504,6 +504,13 @@ typedef struct cgltf_iridescence
 	cgltf_texture_view iridescence_thickness_texture;
 } cgltf_iridescence;

+typedef struct cgltf_anisotropy
+{
+	cgltf_float anisotropy_strength;
+	cgltf_float anisotropy_rotation;
+	cgltf_texture_view anisotropy_texture;
+} cgltf_anisotropy;
+
 typedef struct cgltf_material
 {
 	char* name;
@@ -517,6 +524,7 @@ typedef struct cgltf_material
 	cgltf_bool has_sheen;
 	cgltf_bool has_emissive_strength;
 	cgltf_bool has_iridescence;
+	cgltf_bool has_anisotropy;
 	cgltf_pbr_metallic_roughness pbr_metallic_roughness;
 	cgltf_pbr_specular_glossiness pbr_specular_glossiness;
 	cgltf_clearcoat clearcoat;
@@ -527,6 +535,7 @@ typedef struct cgltf_material
 	cgltf_volume volume;
 	cgltf_emissive_strength emissive_strength;
 	cgltf_iridescence iridescence;
+	cgltf_anisotropy anisotropy;
 	cgltf_texture_view normal_texture;
 	cgltf_texture_view occlusion_texture;
 	cgltf_texture_view emissive_texture;
@@ -559,7 +568,6 @@ typedef struct cgltf_draco_mesh_compression {
 } cgltf_draco_mesh_compression;

 typedef struct cgltf_mesh_gpu_instancing {
-	cgltf_buffer_view* buffer_view;
 	cgltf_attribute* attributes;
 	cgltf_size attributes_count;
 } cgltf_mesh_gpu_instancing;
@@ -842,10 +850,28 @@ cgltf_size cgltf_component_size(cgltf_component_type component_type);
 cgltf_size cgltf_calc_size(cgltf_type type, cgltf_component_type component_type);

 cgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_float* out, cgltf_size float_count);
+cgltf_size cgltf_accessor_unpack_indices(const cgltf_accessor* accessor, cgltf_uint* out, cgltf_size index_count);

 /* this function is deprecated and will be removed in the future; use cgltf_extras::data instead */
 cgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras* extras, char* dest, cgltf_size* dest_size);

+cgltf_size cgltf_mesh_index(const cgltf_data* data, const cgltf_mesh* object);
+cgltf_size cgltf_material_index(const cgltf_data* data, const cgltf_material* object);
+cgltf_size cgltf_accessor_index(const cgltf_data* data, const cgltf_accessor* object);
+cgltf_size cgltf_buffer_view_index(const cgltf_data* data, const cgltf_buffer_view* object);
+cgltf_size cgltf_buffer_index(const cgltf_data* data, const cgltf_buffer* object);
+cgltf_size cgltf_image_index(const cgltf_data* data, const cgltf_image* object);
+cgltf_size cgltf_texture_index(const cgltf_data* data, const cgltf_texture* object);
+cgltf_size cgltf_sampler_index(const cgltf_data* data, const cgltf_sampler* object);
+cgltf_size cgltf_skin_index(const cgltf_data* data, const cgltf_skin* object);
+cgltf_size cgltf_camera_index(const cgltf_data* data, const cgltf_camera* object);
+cgltf_size cgltf_light_index(const cgltf_data* data, const cgltf_light* object);
+cgltf_size cgltf_node_index(const cgltf_data* data, const cgltf_node* object);
+cgltf_size cgltf_scene_index(const cgltf_data* data, const cgltf_scene* object);
+cgltf_size cgltf_animation_index(const cgltf_data* data, const cgltf_animation* object);
+cgltf_size cgltf_animation_sampler_index(const cgltf_animation* animation, const cgltf_animation_sampler* object);
+cgltf_size cgltf_animation_channel_index(const cgltf_animation* animation, const cgltf_animation_channel* object);
+
 #ifdef __cplusplus
 }
 #endif
@@ -866,6 +892,7 @@ cgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras*

 #ifdef CGLTF_IMPLEMENTATION

+#include <assert.h> /* For assert */
 #include <string.h> /* For strncpy */
 #include <stdio.h>  /* For fopen */
 #include <limits.h> /* For UINT_MAX etc */
@@ -875,10 +902,6 @@ cgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras*
 #include <stdlib.h> /* For malloc, free, atoi, atof */
 #endif

-#if CGLTF_VALIDATE_ENABLE_ASSERTS
-#include <assert.h>
-#endif
-
 /* JSMN_PARENT_LINKS is necessary to make parsing large structures linear in input size */
 #define JSMN_PARENT_LINKS

@@ -1000,7 +1023,7 @@ static cgltf_result cgltf_default_file_read(const struct cgltf_memory_options* m
 	{
 		fseek(file, 0, SEEK_END);

-#ifdef _WIN32
+#ifdef _MSC_VER
 		__int64 length = _ftelli64(file);
 #else
 		long length = ftell(file);
@@ -1939,6 +1962,10 @@ void cgltf_free(cgltf_data* data)
 			cgltf_free_texture_view(data, &data->materials[i].iridescence.iridescence_texture);
 			cgltf_free_texture_view(data, &data->materials[i].iridescence.iridescence_thickness_texture);
 		}
+		if (data->materials[i].has_anisotropy)
+		{
+			cgltf_free_texture_view(data, &data->materials[i].anisotropy.anisotropy_texture);
+		}

 		cgltf_free_texture_view(data, &data->materials[i].normal_texture);
 		cgltf_free_texture_view(data, &data->materials[i].occlusion_texture);
@@ -2356,21 +2383,41 @@ cgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_fl
 	cgltf_size element_count = float_count / floats_per_element;

 	// First pass: convert each element in the base accessor.
-	cgltf_float* dest = out;
-	cgltf_accessor dense = *accessor;
-	dense.is_sparse = 0;
-	for (cgltf_size index = 0; index < element_count; index++, dest += floats_per_element)
+	if (accessor->buffer_view == NULL)
 	{
-		if (!cgltf_accessor_read_float(&dense, index, dest, floats_per_element))
+		memset(out, 0, element_count * floats_per_element * sizeof(cgltf_float));
+	}
+	else
+	{
+		const uint8_t* element = cgltf_buffer_view_data(accessor->buffer_view);
+		if (element == NULL)
 		{
 			return 0;
 		}
+		element += accessor->offset;
+
+		if (accessor->component_type == cgltf_component_type_r_32f && accessor->stride == floats_per_element * sizeof(cgltf_float))
+		{
+			memcpy(out, element, element_count * floats_per_element * sizeof(cgltf_float));
+		}
+		else
+		{
+			cgltf_float* dest = out;
+
+			for (cgltf_size index = 0; index < element_count; index++, dest += floats_per_element, element += accessor->stride)
+			{
+				if (!cgltf_element_read_float(element, accessor->type, accessor->component_type, accessor->normalized, dest, floats_per_element))
+				{
+					return 0;
+				}
+			}
+		}
 	}

 	// Second pass: write out each element in the sparse accessor.
 	if (accessor->is_sparse)
 	{
-		const cgltf_accessor_sparse* sparse = &dense.sparse;
+		const cgltf_accessor_sparse* sparse = &accessor->sparse;

 		const uint8_t* index_data = cgltf_buffer_view_data(sparse->indices_buffer_view);
 		const uint8_t* reader_head = cgltf_buffer_view_data(sparse->values_buffer_view);
@@ -2384,17 +2431,15 @@ cgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_fl
 		reader_head += sparse->values_byte_offset;

 		cgltf_size index_stride = cgltf_component_size(sparse->indices_component_type);
-		for (cgltf_size reader_index = 0; reader_index < sparse->count; reader_index++, index_data += index_stride)
+		for (cgltf_size reader_index = 0; reader_index < sparse->count; reader_index++, index_data += index_stride, reader_head += accessor->stride)
 		{
 			size_t writer_index = cgltf_component_read_index(index_data, sparse->indices_component_type);
 			float* writer_head = out + writer_index * floats_per_element;

-			if (!cgltf_element_read_float(reader_head, dense.type, dense.component_type, dense.normalized, writer_head, floats_per_element))
+			if (!cgltf_element_read_float(reader_head, accessor->type, accessor->component_type, accessor->normalized, writer_head, floats_per_element))
 			{
 				return 0;
 			}
-
-			reader_head += dense.stride;
 		}
 	}

@@ -2488,6 +2533,143 @@ cgltf_size cgltf_accessor_read_index(const cgltf_accessor* accessor, cgltf_size
 	return cgltf_component_read_index(element, accessor->component_type);
 }

+cgltf_size cgltf_mesh_index(const cgltf_data* data, const cgltf_mesh* object)
+{
+	assert(object && (cgltf_size)(object - data->meshes) < data->meshes_count);
+	return (cgltf_size)(object - data->meshes);
+}
+
+cgltf_size cgltf_material_index(const cgltf_data* data, const cgltf_material* object)
+{
+	assert(object && (cgltf_size)(object - data->materials) < data->materials_count);
+	return (cgltf_size)(object - data->materials);
+}
+
+cgltf_size cgltf_accessor_index(const cgltf_data* data, const cgltf_accessor* object)
+{
+	assert(object && (cgltf_size)(object - data->accessors) < data->accessors_count);
+	return (cgltf_size)(object - data->accessors);
+}
+
+cgltf_size cgltf_buffer_view_index(const cgltf_data* data, const cgltf_buffer_view* object)
+{
+	assert(object && (cgltf_size)(object - data->buffer_views) < data->buffer_views_count);
+	return (cgltf_size)(object - data->buffer_views);
+}
+
+cgltf_size cgltf_buffer_index(const cgltf_data* data, const cgltf_buffer* object)
+{
+	assert(object && (cgltf_size)(object - data->buffers) < data->buffers_count);
+	return (cgltf_size)(object - data->buffers);
+}
+
+cgltf_size cgltf_image_index(const cgltf_data* data, const cgltf_image* object)
+{
+	assert(object && (cgltf_size)(object - data->images) < data->images_count);
+	return (cgltf_size)(object - data->images);
+}
+
+cgltf_size cgltf_texture_index(const cgltf_data* data, const cgltf_texture* object)
+{
+	assert(object && (cgltf_size)(object - data->textures) < data->textures_count);
+	return (cgltf_size)(object - data->textures);
+}
+
+cgltf_size cgltf_sampler_index(const cgltf_data* data, const cgltf_sampler* object)
+{
+	assert(object && (cgltf_size)(object - data->samplers) < data->samplers_count);
+	return (cgltf_size)(object - data->samplers);
+}
+
+cgltf_size cgltf_skin_index(const cgltf_data* data, const cgltf_skin* object)
+{
+	assert(object && (cgltf_size)(object - data->skins) < data->skins_count);
+	return (cgltf_size)(object - data->skins);
+}
+
+cgltf_size cgltf_camera_index(const cgltf_data* data, const cgltf_camera* object)
+{
+	assert(object && (cgltf_size)(object - data->cameras) < data->cameras_count);
+	return (cgltf_size)(object - data->cameras);
+}
+
+cgltf_size cgltf_light_index(const cgltf_data* data, const cgltf_light* object)
+{
+	assert(object && (cgltf_size)(object - data->lights) < data->lights_count);
+	return (cgltf_size)(object - data->lights);
+}
+
+cgltf_size cgltf_node_index(const cgltf_data* data, const cgltf_node* object)
+{
+	assert(object && (cgltf_size)(object - data->nodes) < data->nodes_count);
+	return (cgltf_size)(object - data->nodes);
+}
+
+cgltf_size cgltf_scene_index(const cgltf_data* data, const cgltf_scene* object)
+{
+	assert(object && (cgltf_size)(object - data->scenes) < data->scenes_count);
+	return (cgltf_size)(object - data->scenes);
+}
+
+cgltf_size cgltf_animation_index(const cgltf_data* data, const cgltf_animation* object)
+{
+	assert(object && (cgltf_size)(object - data->animations) < data->animations_count);
+	return (cgltf_size)(object - data->animations);
+}
+
+cgltf_size cgltf_animation_sampler_index(const cgltf_animation* animation, const cgltf_animation_sampler* object)
+{
+	assert(object && (cgltf_size)(object - animation->samplers) < animation->samplers_count);
+	return (cgltf_size)(object - animation->samplers);
+}
+
+cgltf_size cgltf_animation_channel_index(const cgltf_animation* animation, const cgltf_animation_channel* object)
+{
+	assert(object && (cgltf_size)(object - animation->channels) < animation->channels_count);
+	return (cgltf_size)(object - animation->channels);
+}
+
+cgltf_size cgltf_accessor_unpack_indices(const cgltf_accessor* accessor, cgltf_uint* out, cgltf_size index_count)
+{
+	if (out == NULL)
+	{
+		return accessor->count;
+	}
+
+	index_count = accessor->count < index_count ? accessor->count : index_count;
+
+	if (accessor->is_sparse)
+	{
+		return 0;
+	}
+	if (accessor->buffer_view == NULL)
+	{
+		return 0;
+	}
+	const uint8_t* element = cgltf_buffer_view_data(accessor->buffer_view);
+	if (element == NULL)
+	{
+		return 0;
+	}
+	element += accessor->offset;
+
+	if (accessor->component_type == cgltf_component_type_r_32u && accessor->stride == sizeof(cgltf_uint))
+	{
+		memcpy(out, element, index_count * sizeof(cgltf_uint));
+	}
+	else
+	{
+		cgltf_uint* dest = out;
+
+		for (cgltf_size index = 0; index < index_count; index++, dest++, element += accessor->stride)
+		{
+			*dest = (cgltf_uint)cgltf_component_read_index(element, accessor->component_type);
+		}
+	}
+
+	return index_count;
+}
+
 #define CGLTF_ERROR_JSON -1
 #define CGLTF_ERROR_NOMEM -2
 #define CGLTF_ERROR_LEGACY -3
@@ -2864,6 +3046,10 @@ static int cgltf_parse_json_draco_mesh_compression(cgltf_options* options, jsmnt
 			out_draco_mesh_compression->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
 			++i;
 		}
+		else
+		{
+			i = cgltf_skip_json(tokens, i+1);
+		}

 		if (i < 0)
 		{
@@ -2889,11 +3075,9 @@ static int cgltf_parse_json_mesh_gpu_instancing(cgltf_options* options, jsmntok_
 		{
 			i = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_mesh_gpu_instancing->attributes, &out_mesh_gpu_instancing->attributes_count);
 		}
-		else if (cgltf_json_strcmp(tokens + i, json_chunk, "bufferView") == 0)
+		else
 		{
-			++i;
-			out_mesh_gpu_instancing->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
-			++i;
+			i = cgltf_skip_json(tokens, i+1);
 		}

 		if (i < 0)
@@ -4128,6 +4312,47 @@ static int cgltf_parse_json_iridescence(cgltf_options* options, jsmntok_t const*
 	return i;
 }

+static int cgltf_parse_json_anisotropy(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_anisotropy* out_anisotropy)
+{
+	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
+	int size = tokens[i].size;
+	++i;
+
+
+	for (int j = 0; j < size; ++j)
+	{
+		CGLTF_CHECK_KEY(tokens[i]);
+
+		if (cgltf_json_strcmp(tokens + i, json_chunk, "anisotropyStrength") == 0)
+		{
+			++i;
+			out_anisotropy->anisotropy_strength = cgltf_json_to_float(tokens + i, json_chunk);
+			++i;
+		}
+		else if (cgltf_json_strcmp(tokens + i, json_chunk, "anisotropyRotation") == 0)
+		{
+			++i;
+			out_anisotropy->anisotropy_rotation = cgltf_json_to_float(tokens + i, json_chunk);
+			++i;
+		}
+		else if (cgltf_json_strcmp(tokens + i, json_chunk, "anisotropyTexture") == 0)
+		{
+			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_anisotropy->anisotropy_texture);
+		}
+		else
+		{
+			i = cgltf_skip_json(tokens, i + 1);
+		}
+
+		if (i < 0)
+		{
+			return i;
+		}
+	}
+
+	return i;
+}
+
 static int cgltf_parse_json_image(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_image* out_image)
 {
 	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
@@ -4516,6 +4741,11 @@ static int cgltf_parse_json_material(cgltf_options* options, jsmntok_t const* to
 					out_material->has_iridescence = 1;
 					i = cgltf_parse_json_iridescence(options, tokens, i + 1, json_chunk, &out_material->iridescence);
 				}
+				else if (cgltf_json_strcmp(tokens + i, json_chunk, "KHR_materials_anisotropy") == 0)
+				{
+					out_material->has_anisotropy = 1;
+					i = cgltf_parse_json_anisotropy(options, tokens, i + 1, json_chunk, &out_material->anisotropy);
+				}
 				else
 				{
 					i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_material->extensions[out_material->extensions_count++]));
@@ -6367,6 +6597,8 @@ static int cgltf_fixup_pointers(cgltf_data* data)

 		CGLTF_PTRFIXUP(data->materials[i].iridescence.iridescence_texture.texture, data->textures, data->textures_count);
 		CGLTF_PTRFIXUP(data->materials[i].iridescence.iridescence_thickness_texture.texture, data->textures, data->textures_count);
+
+		CGLTF_PTRFIXUP(data->materials[i].anisotropy.anisotropy_texture.texture, data->textures, data->textures_count);
 	}

 	for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
@@ -6411,7 +6643,6 @@ static int cgltf_fixup_pointers(cgltf_data* data)

 		if (data->nodes[i].has_mesh_gpu_instancing)
 		{
-			CGLTF_PTRFIXUP_REQ(data->nodes[i].mesh_gpu_instancing.buffer_view, data->buffer_views, data->buffer_views_count);
 			for (cgltf_size m = 0; m < data->nodes[i].mesh_gpu_instancing.attributes_count; ++m)
 			{
 				CGLTF_PTRFIXUP_REQ(data->nodes[i].mesh_gpu_instancing.attributes[m].data, data->accessors, data->accessors_count);
--- a/3rdparty/cgltf/cgltf_write.h
+++ b/3rdparty/cgltf/cgltf_write.h
@@ -85,6 +85,7 @@ cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size si
 #define CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH (1 << 13)
 #define CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING (1 << 14)
 #define CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE (1 << 15)
+#define CGLTF_EXTENSION_FLAG_MATERIALS_ANISOTROPY (1 << 16)

 typedef struct {
 	char* buffer;
@@ -641,6 +642,11 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE;
 	}

+	if (material->has_anisotropy)
+	{
+		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_ANISOTROPY;
+	}
+
 	if (material->has_pbr_metallic_roughness)
 	{
 		const cgltf_pbr_metallic_roughness* params = &material->pbr_metallic_roughness;
@@ -656,7 +662,7 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 		cgltf_write_line(context, "}");
 	}

-	if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission || material->has_sheen || material->has_volume || material->has_emissive_strength || material->has_iridescence)
+	if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission || material->has_sheen || material->has_volume || material->has_emissive_strength || material->has_iridescence || material->has_anisotropy)
 	{
 		cgltf_write_line(context, "\"extensions\": {");
 		if (material->has_clearcoat)
@@ -767,6 +773,15 @@ static void cgltf_write_material(cgltf_write_context* context, const cgltf_mater
 			CGLTF_WRITE_TEXTURE_INFO("iridescenceThicknessTexture", params->iridescence_thickness_texture);
 			cgltf_write_line(context, "}");
 		}
+		if (material->has_anisotropy)
+		{
+			cgltf_write_line(context, "\"KHR_materials_anisotropy\": {");
+			const cgltf_anisotropy* params = &material->anisotropy;
+			cgltf_write_floatprop(context, "anisotropyFactor", params->anisotropy_strength, 0.f);
+			cgltf_write_floatprop(context, "anisotropyRotation", params->anisotropy_rotation, 0.f);
+			CGLTF_WRITE_TEXTURE_INFO("anisotropyTexture", params->anisotropy_texture);
+			cgltf_write_line(context, "}");
+		}
 		cgltf_write_line(context, "}");
 	}

@@ -977,7 +992,6 @@ static void cgltf_write_node(cgltf_write_context* context, const cgltf_node* nod

 		cgltf_write_line(context, "\"EXT_mesh_gpu_instancing\": {");
 		{
-			CGLTF_WRITE_IDXPROP("bufferView", node->mesh_gpu_instancing.buffer_view, context->data->buffer_views);
 			cgltf_write_line(context, "\"attributes\": {");
 			{
 				for (cgltf_size i = 0; i < node->mesh_gpu_instancing.attributes_count; ++i)
@@ -1250,6 +1264,9 @@ static void cgltf_write_extensions(cgltf_write_context* context, uint32_t extens
 	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE) {
 		cgltf_write_stritem(context, "KHR_materials_iridescence");
 	}
+	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_ANISOTROPY) {
+		cgltf_write_stritem(context, "KHR_materials_anisotropy");
+	}
 	if (extension_flags & CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING) {
 		cgltf_write_stritem(context, "EXT_mesh_gpu_instancing");
 	}