REVIEWED: LoadGLTF()
Reorganized code and added some feature and listed restrictions. Some gltf models do not work yet.
This commit is contained in:
raysan5
parent
1fd8052527
commit
18db2c4f01
422
src/rmodels.c
422
src/rmodels.c
@ -4494,109 +4494,111 @@ static ModelAnimation* LoadModelAnimationsIQM(const char *fileName, unsigned int
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#endif
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#if defined(SUPPORT_FILEFORMAT_GLTF)
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static Image LoadImageFromCgltfImage(cgltf_image *image, const char *texPath, Color tint)
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// Load image from different glTF provided methods (uri, path, buffer_view)
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static Image LoadImageFromCgltfImage(cgltf_image *cgltfImage, const char *texPath)
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{
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Image rimage = { 0 };
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Image image = { 0 };
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if (image->uri)
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if (cgltfImage->uri != NULL) // Check if image data is provided as a uri (base64 or path)
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{
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if ((strlen(image->uri) > 5) &&
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(image->uri[0] == 'd') &&
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(image->uri[1] == 'a') &&
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(image->uri[2] == 't') &&
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(image->uri[3] == 'a') &&
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(image->uri[4] == ':'))
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if ((strlen(cgltfImage->uri) > 5) &&
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(cgltfImage->uri[0] == 'd') &&
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(cgltfImage->uri[1] == 'a') &&
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(cgltfImage->uri[2] == 't') &&
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(cgltfImage->uri[3] == 'a') &&
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(cgltfImage->uri[4] == ':')) // Check if image is provided as base64 text data
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{
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// Data URI
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// Format: data:<mediatype>;base64,<data>
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// Data URI Format: data:<mediatype>;base64,<data>
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// Find the comma
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int i = 0;
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while ((image->uri[i] != ',') && (image->uri[i] != 0)) i++;
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while ((cgltfImage->uri[i] != ',') && (cgltfImage->uri[i] != 0)) i++;
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if (image->uri[i] == 0) TRACELOG(LOG_WARNING, "IMAGE: glTF data URI is not a valid image");
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if (cgltfImage->uri[i] == 0) TRACELOG(LOG_WARNING, "IMAGE: glTF data URI is not a valid image");
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else
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{
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int base64Size = strlen(image->uri + i + 1);
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int base64Size = strlen(cgltfImage->uri + i + 1);
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int outSize = 3*(base64Size/4); // TODO: Consider padding (-numberOfPaddingCharacters)
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char *data = NULL;
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cgltf_options options = { 0 };
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cgltf_result result = cgltf_load_buffer_base64(&options, outSize, image->uri + i + 1, &data);
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cgltf_result result = cgltf_load_buffer_base64(&options, outSize, cgltfImage->uri + i + 1, &data);
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if (result == cgltf_result_success)
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{
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rimage = LoadImageFromMemory(".png", data, outSize);
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image = LoadImageFromMemory(".png", data, outSize);
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cgltf_free(data);
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}
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// TODO: Tint shouldn't be applied here!
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ImageColorTint(&rimage, tint);
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}
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}
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else
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else // Check if image is provided as image path
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{
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rimage = LoadImage(TextFormat("%s/%s", texPath, image->uri));
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// TODO: Tint shouldn't be applied here!
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ImageColorTint(&rimage, tint);
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image = LoadImage(TextFormat("%s/%s", texPath, cgltfImage->uri));
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}
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}
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else if (image->buffer_view)
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else if (cgltfImage->buffer_view->buffer->data != NULL) // Check if image is provided as data buffer
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{
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unsigned char *data = RL_MALLOC(image->buffer_view->size);
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int n = (int)image->buffer_view->offset;
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int stride = (int)image->buffer_view->stride ? (int)image->buffer_view->stride : 1;
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unsigned char *data = RL_MALLOC(cgltfImage->buffer_view->size);
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int offset = (int)cgltfImage->buffer_view->offset;
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int stride = (int)cgltfImage->buffer_view->stride? (int)cgltfImage->buffer_view->stride : 1;
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for (unsigned int i = 0; i < image->buffer_view->size; i++)
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// Copy buffer data to memory for loading
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for (unsigned int i = 0; i < cgltfImage->buffer_view->size; i++)
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{
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data[i] = ((unsigned char *)image->buffer_view->buffer->data)[n];
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n += stride;
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data[i] = ((unsigned char *)cgltfImage->buffer_view->buffer->data)[offset];
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offset += stride;
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}
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rimage = LoadImageFromMemory(".png", data, (int)image->buffer_view->size);
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// Check mime_type for image: (cgltfImage->mime_type == "image\\/png")
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if (strcmp(cgltfImage->mime_type, "image\\/png") == 0) image = LoadImageFromMemory(".png", data, (int)cgltfImage->buffer_view->size);
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else if (strcmp(cgltfImage->mime_type, "image\\/jpeg") == 0) image = LoadImageFromMemory(".jpg", data, (int)cgltfImage->buffer_view->size);
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else TRACELOG(LOG_WARNING, "MODEL: glTF image data MIME type not recognized", TextFormat("%s/%s", texPath, cgltfImage->uri));
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RL_FREE(data);
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// TODO: Tint shouldn't be applied here!
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ImageColorTint(&rimage, tint);
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}
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else rimage = GenImageColor(1, 1, tint);
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return rimage;
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return image;
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}
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// LoadGLTF loads in model data from given filename, supporting both .gltf and .glb
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// Load glTF file into model struct, .gltf and .glb supported
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static Model LoadGLTF(const char *fileName)
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{
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/***********************************************************************************
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/*********************************************************************************************
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Function implemented by Wilhem Barbier(@wbrbr), with modifications by Tyler Bezera(@gamerfiend)
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Reviewed by Ramon Santamaria (@raysan5)
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Features:
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FEATURES:
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- Supports .gltf and .glb files
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- Supports embedded (base64) or external textures
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- Loads all raylib supported material textures, values and colors
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- Supports multiple mesh per model and multiple primitives per model
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- Supports PBR metallic/roughness flow, loads material textures, values and colors
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PBR specular/glossiness flow and extended texture flows not supported
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- Supports multiple meshes per model (every primitives is loaded as a separate mesh)
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Some restrictions (not exhaustive):
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- Triangle-only meshes
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- Not supported node hierarchies or transforms
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- Only supports unsigned short indices (no byte/unsigned int)
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- Only supports float for texture coordinates (no byte/unsigned short)
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RESTRICTIONS:
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- Only triangle meshes supported
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- Vertex attibute types and formats supported:
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> Vertices (position): vec3: float
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> Normals: vec3: float
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> Texcoords: vec2: float
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> Colors: vec4: u8, u16, f32 (normalized)
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> Indices: u16, u32 (truncated to u16)
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- Node hierarchies or transforms not supported
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*************************************************************************************/
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***********************************************************************************************/
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#define LOAD_ACCESSOR(type, nbcomp, acc, dst) \
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// Macro to simplify attributes loading code
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#define LOAD_ATTRIBUTE(accesor, numComp, dataType, dstPtr) \
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{ \
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int n = 0; \
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type *buffer = (type *)acc->buffer_view->buffer->data + acc->buffer_view->offset/sizeof(type) + acc->offset/sizeof(type); \
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for (unsigned int k = 0; k < acc->count; k++) \
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dataType *buffer = (dataType *)accesor->buffer_view->buffer->data + accesor->buffer_view->offset/sizeof(dataType) + accesor->offset/sizeof(dataType); \
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for (unsigned int k = 0; k < accesor->count; k++) \
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{\
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for (int l = 0; l < nbcomp; l++) \
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for (int l = 0; l < numComp; l++) \
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{\
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dst[nbcomp*k + l] = buffer[n + l];\
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dstPtr[numComp*k + l] = buffer[n + l];\
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}\
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n += (int)(acc->stride/sizeof(type));\
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n += (int)(accesor->stride/sizeof(dataType));\
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}\
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}
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@ -4612,178 +4614,292 @@ static Model LoadGLTF(const char *fileName)
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cgltf_options options = { 0 };
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cgltf_data *data = NULL;
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cgltf_result result = cgltf_parse(&options, fileData, dataSize, &data);
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if (result == cgltf_result_success)
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{
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TRACELOG(LOG_INFO, "MODEL: [%s] glTF meshes (%s) count: %i", fileName, (data->file_type == 2)? "glb" : "gltf", data->meshes_count);
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TRACELOG(LOG_INFO, "MODEL: [%s] glTF materials (%s) count: %i", fileName, (data->file_type == 2)? "glb" : "gltf", data->materials_count);
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if (data->file_type == cgltf_file_type_glb) TRACELOG(LOG_INFO, "MODEL: [%s] Model basic data (glb) loaded successfully", fileName);
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else if (data->file_type == cgltf_file_type_gltf) TRACELOG(LOG_INFO, "MODEL: [%s] Model basic data (glTF) loaded successfully", fileName);
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else TRACELOG(LOG_WARNING, "MODEL: [%s] Model format not recognized", fileName);
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// Read data buffers
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TRACELOG(LOG_INFO, " > Meshes count: %i", data->meshes_count);
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TRACELOG(LOG_INFO, " > Materials count: %i", data->materials_count);
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TRACELOG(LOG_DEBUG, " > Buffers count: %i", data->buffers_count);
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TRACELOG(LOG_DEBUG, " > Images count: %i", data->images_count);
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TRACELOG(LOG_DEBUG, " > Textures count: %i", data->textures_count);
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// Force reading data buffers (fills buffer_view->buffer->data)
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// NOTE: If an uri is defined to base64 data or external path, it's automatically loaded -> TODO: Verify this assumption
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result = cgltf_load_buffers(&options, data, fileName);
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if (result != cgltf_result_success) TRACELOG(LOG_INFO, "MODEL: [%s] Failed to load mesh/material buffers", fileName);
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int primitivesCount = 0;
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// NOTE: We will load every primitive in the glTF as a separate raylib mesh
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for (unsigned int i = 0; i < data->meshes_count; i++) primitivesCount += (int)data->meshes[i].primitives_count;
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// Process glTF data and map to model
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// Load our model data: meshes and materials
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model.meshCount = primitivesCount;
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model.meshes = RL_CALLOC(model.meshCount, sizeof(Mesh));
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model.materialCount = (int)data->materials_count + 1;
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model.materials = RL_MALLOC(model.materialCount*sizeof(Material));
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model.meshMaterial = RL_MALLOC(model.meshCount*sizeof(int));
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for (int i = 0; i < model.meshCount; i++) model.meshes[i].vboId = (unsigned int*)RL_CALLOC(MAX_MESH_VERTEX_BUFFERS, sizeof(unsigned int));
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for (int i = 0; i < model.meshCount; i++) model.meshes[i].vboId = (unsigned int *)RL_CALLOC(MAX_MESH_VERTEX_BUFFERS, sizeof(unsigned int));
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// NOTE: We keep an extra slot for default material, in case some mesh requires it
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model.materialCount = (int)data->materials_count + 1;
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model.materials = RL_CALLOC(model.materialCount, sizeof(Material));
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model.materials[0] = LoadMaterialDefault(); // Load default material (index: 0)
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for (int i = 0; i < model.materialCount - 1; i++)
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// Load mesh-material indices, by default all meshes are mapped to material index: 0
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model.meshMaterial = RL_CALLOC(model.meshCount, sizeof(int));
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// Load materials data
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for (unsigned int i = 0, j = 1; i < data->materials_count; i++, j++)
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{
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model.materials[i] = LoadMaterialDefault();
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Color tint = (Color){ 255, 255, 255, 255 };
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model.materials[j] = LoadMaterialDefault();
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const char *texPath = GetDirectoryPath(fileName);
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//Ensure material follows raylib support for PBR (metallic/roughness flow)
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// Check glTF material flow: PBR metallic/roughness flow
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// NOTE: Alternatively, materials can follow PBR specular/glossiness flow
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if (data->materials[i].has_pbr_metallic_roughness)
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{
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tint.r = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[0] * 255);
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tint.g = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[1] * 255);
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tint.b = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[2] * 255);
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tint.a = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[3] * 255);
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model.materials[i].maps[MATERIAL_MAP_ALBEDO].color = tint;
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// Load base color texture (albedo)
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if (data->materials[i].pbr_metallic_roughness.base_color_texture.texture)
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{
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Image albedo = LoadImageFromCgltfImage(data->materials[i].pbr_metallic_roughness.base_color_texture.texture->image, texPath, tint);
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model.materials[i].maps[MATERIAL_MAP_ALBEDO].texture = LoadTextureFromImage(albedo);
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UnloadImage(albedo);
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Image imAlbedo = LoadImageFromCgltfImage(data->materials[i].pbr_metallic_roughness.base_color_texture.texture->image, texPath);
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if (imAlbedo.data != NULL)
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{
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model.materials[j].maps[MATERIAL_MAP_ALBEDO].texture = LoadTextureFromImage(imAlbedo);
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UnloadImage(imAlbedo);
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}
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// Load base color factor (tint)
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model.materials[j].maps[MATERIAL_MAP_ALBEDO].color.r = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[0]*255);
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model.materials[j].maps[MATERIAL_MAP_ALBEDO].color.g = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[1]*255);
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model.materials[j].maps[MATERIAL_MAP_ALBEDO].color.b = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[2]*255);
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model.materials[j].maps[MATERIAL_MAP_ALBEDO].color.a = (unsigned char)(data->materials[i].pbr_metallic_roughness.base_color_factor[3]*255);
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}
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tint = WHITE; // Set tint to white after it's been used by Albedo
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// Load metallic/roughness texture
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if (data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.texture)
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{
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Image metallicRoughness = LoadImageFromCgltfImage(data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.texture->image, texPath, tint);
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model.materials[i].maps[MATERIAL_MAP_ROUGHNESS].texture = LoadTextureFromImage(metallicRoughness);
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Image imMetallicRoughness = LoadImageFromCgltfImage(data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.texture->image, texPath);
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if (imMetallicRoughness.data != NULL)
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{
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model.materials[j].maps[MATERIAL_MAP_ROUGHNESS].texture = LoadTextureFromImage(imMetallicRoughness);
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UnloadImage(imMetallicRoughness);
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}
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// Load metallic/roughness material properties
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float roughness = data->materials[i].pbr_metallic_roughness.roughness_factor;
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model.materials[i].maps[MATERIAL_MAP_ROUGHNESS].value = roughness;
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model.materials[j].maps[MATERIAL_MAP_ROUGHNESS].value = roughness;
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float metallic = data->materials[i].pbr_metallic_roughness.metallic_factor;
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model.materials[i].maps[MATERIAL_MAP_METALNESS].value = metallic;
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UnloadImage(metallicRoughness);
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model.materials[j].maps[MATERIAL_MAP_METALNESS].value = metallic;
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}
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// Load normal texture
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if (data->materials[i].normal_texture.texture)
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{
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Image normalImage = LoadImageFromCgltfImage(data->materials[i].normal_texture.texture->image, texPath, tint);
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model.materials[i].maps[MATERIAL_MAP_NORMAL].texture = LoadTextureFromImage(normalImage);
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UnloadImage(normalImage);
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Image imNormal = LoadImageFromCgltfImage(data->materials[i].normal_texture.texture->image, texPath);
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if (imNormal.data != NULL)
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{
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model.materials[j].maps[MATERIAL_MAP_NORMAL].texture = LoadTextureFromImage(imNormal);
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UnloadImage(imNormal);
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}
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}
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// Load ambient occlusion texture
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if (data->materials[i].occlusion_texture.texture)
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{
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Image occulsionImage = LoadImageFromCgltfImage(data->materials[i].occlusion_texture.texture->image, texPath, tint);
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model.materials[i].maps[MATERIAL_MAP_OCCLUSION].texture = LoadTextureFromImage(occulsionImage);
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UnloadImage(occulsionImage);
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Image imOcclusion = LoadImageFromCgltfImage(data->materials[i].occlusion_texture.texture->image, texPath);
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if (imOcclusion.data != NULL)
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{
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model.materials[j].maps[MATERIAL_MAP_OCCLUSION].texture = LoadTextureFromImage(imOcclusion);
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UnloadImage(imOcclusion);
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}
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}
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// Load emissive texture
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if (data->materials[i].emissive_texture.texture)
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{
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Image emissiveImage = LoadImageFromCgltfImage(data->materials[i].emissive_texture.texture->image, texPath, tint);
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model.materials[i].maps[MATERIAL_MAP_EMISSION].texture = LoadTextureFromImage(emissiveImage);
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tint.r = (unsigned char)(data->materials[i].emissive_factor[0]*255);
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tint.g = (unsigned char)(data->materials[i].emissive_factor[1]*255);
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tint.b = (unsigned char)(data->materials[i].emissive_factor[2]*255);
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model.materials[i].maps[MATERIAL_MAP_EMISSION].color = tint;
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UnloadImage(emissiveImage);
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Image imEmissive = LoadImageFromCgltfImage(data->materials[i].emissive_texture.texture->image, texPath);
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if (imEmissive.data != NULL)
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{
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model.materials[j].maps[MATERIAL_MAP_EMISSION].texture = LoadTextureFromImage(imEmissive);
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UnloadImage(imEmissive);
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}
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// Load emissive color factor
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model.materials[j].maps[MATERIAL_MAP_EMISSION].color.r = (unsigned char)(data->materials[i].emissive_factor[0]*255);
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model.materials[j].maps[MATERIAL_MAP_EMISSION].color.g = (unsigned char)(data->materials[i].emissive_factor[1]*255);
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model.materials[j].maps[MATERIAL_MAP_EMISSION].color.b = (unsigned char)(data->materials[i].emissive_factor[2]*255);
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model.materials[j].maps[MATERIAL_MAP_EMISSION].color.a = 255;
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}
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}
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// Other possible materials not supported by raylib pipeline:
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// has_clearcoat, has_transmission, has_volume, has_ior, has specular, has_sheen
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}
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model.materials[model.materialCount - 1] = LoadMaterialDefault();
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int primitiveIndex = 0;
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// Load meshes data
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for (unsigned int i = 0; i < data->meshes_count; i++)
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{
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for (unsigned int p = 0; p < data->meshes[i].primitives_count; p++)
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for (unsigned int p = 0, primitiveIndex = 0; p < data->meshes[i].primitives_count; p++)
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{
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// NOTE: We only support primitives defined by triangles
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// Other alternatives: points, lines, line_strip, triangle_strip
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if (data->meshes[i].primitives[p].type != cgltf_primitive_type_triangles) continue;
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// NOTE: Attributes data could be provided in several data formats (8, 8u, 16u, 32...),
|
||||
// Only some formats for each attribute type are supported, read info at the top of this function!
|
||||
|
||||
for (unsigned int j = 0; j < data->meshes[i].primitives[p].attributes_count; j++)
|
||||
{
|
||||
if (data->meshes[i].primitives[p].attributes[j].type == cgltf_attribute_type_position)
|
||||
// Check the different attributes for every pimitive
|
||||
if (data->meshes[i].primitives[p].attributes[j].type == cgltf_attribute_type_position) // POSITION
|
||||
{
|
||||
cgltf_accessor *acc = data->meshes[i].primitives[p].attributes[j].data;
|
||||
model.meshes[primitiveIndex].vertexCount = (int)acc->count;
|
||||
model.meshes[primitiveIndex].vertices = RL_MALLOC(model.meshes[primitiveIndex].vertexCount*3*sizeof(float));
|
||||
cgltf_accessor *attribute = data->meshes[i].primitives[p].attributes[j].data;
|
||||
|
||||
LOAD_ACCESSOR(float, 3, acc, model.meshes[primitiveIndex].vertices)
|
||||
}
|
||||
else if (data->meshes[i].primitives[p].attributes[j].type == cgltf_attribute_type_normal)
|
||||
{
|
||||
cgltf_accessor *acc = data->meshes[i].primitives[p].attributes[j].data;
|
||||
model.meshes[primitiveIndex].normals = RL_MALLOC(acc->count*3*sizeof(float));
|
||||
|
||||
LOAD_ACCESSOR(float, 3, acc, model.meshes[primitiveIndex].normals)
|
||||
}
|
||||
else if (data->meshes[i].primitives[p].attributes[j].type == cgltf_attribute_type_texcoord)
|
||||
{
|
||||
cgltf_accessor *acc = data->meshes[i].primitives[p].attributes[j].data;
|
||||
|
||||
if (acc->component_type == cgltf_component_type_r_32f)
|
||||
if ((attribute->component_type == cgltf_component_type_r_32f) && (attribute->type == cgltf_type_vec3))
|
||||
{
|
||||
model.meshes[primitiveIndex].texcoords = RL_MALLOC(acc->count*2*sizeof(float));
|
||||
LOAD_ACCESSOR(float, 2, acc, model.meshes[primitiveIndex].texcoords)
|
||||
// Init raylib mesh vertices to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].vertexCount = (int)attribute->count;
|
||||
model.meshes[primitiveIndex].vertices = RL_MALLOC(attribute->count*3*sizeof(float));
|
||||
|
||||
// Load 3 components of float data type into mesh.vertices
|
||||
LOAD_ATTRIBUTE(attribute, 3, float, model.meshes[primitiveIndex].vertices)
|
||||
}
|
||||
else
|
||||
else TRACELOG(LOG_WARNING, "MODEL: [%s] Vertices attribute data format not supported, use vec3 float", fileName);
|
||||
}
|
||||
else if (data->meshes[i].primitives[p].attributes[j].type == cgltf_attribute_type_normal) // NORMAL
|
||||
{
|
||||
cgltf_accessor *attribute = data->meshes[i].primitives[p].attributes[j].data;
|
||||
|
||||
if ((attribute->component_type == cgltf_component_type_r_32f) && (attribute->type == cgltf_type_vec3))
|
||||
{
|
||||
// TODO: Support normalized unsigned byte/unsigned short texture coordinates
|
||||
TRACELOG(LOG_WARNING, "MODEL: [%s] glTF texture coordinates must be float", fileName);
|
||||
// Init raylib mesh normals to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].normals = RL_MALLOC(attribute->count*3*sizeof(float));
|
||||
|
||||
// Load 3 components of float data type into mesh.normals
|
||||
LOAD_ATTRIBUTE(attribute, 3, float, model.meshes[primitiveIndex].normals)
|
||||
}
|
||||
else TRACELOG(LOG_WARNING, "MODEL: [%s] Normal attribute data format not supported, use vec3 float", fileName);
|
||||
}
|
||||
}
|
||||
|
||||
cgltf_accessor *acc = data->meshes[i].primitives[p].indices;
|
||||
|
||||
if (acc)
|
||||
{
|
||||
if (acc->component_type == cgltf_component_type_r_16u)
|
||||
else if (data->meshes[i].primitives[p].attributes[j].type == cgltf_attribute_type_texcoord) // TEXCOORD_0
|
||||
{
|
||||
model.meshes[primitiveIndex].triangleCount = (int)acc->count/3;
|
||||
model.meshes[primitiveIndex].indices = RL_MALLOC(model.meshes[primitiveIndex].triangleCount*3*sizeof(unsigned short));
|
||||
LOAD_ACCESSOR(unsigned short, 1, acc, model.meshes[primitiveIndex].indices)
|
||||
cgltf_accessor *attribute = data->meshes[i].primitives[p].attributes[j].data;
|
||||
|
||||
if ((attribute->component_type == cgltf_component_type_r_32f) && (attribute->type == cgltf_type_vec2))
|
||||
{
|
||||
// Init raylib mesh texcoords to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].texcoords = RL_MALLOC(attribute->count*2*sizeof(float));
|
||||
|
||||
// Load 3 components of float data type into mesh.texcoords
|
||||
LOAD_ATTRIBUTE(attribute, 2, float, model.meshes[primitiveIndex].texcoords)
|
||||
}
|
||||
else TRACELOG(LOG_WARNING, "MODEL: [%s] Texcoords attribute data format not supported, use vec2 float", fileName);
|
||||
}
|
||||
else
|
||||
else if (data->meshes[i].primitives[p].attributes[j].type == cgltf_attribute_type_color) // COLOR_0
|
||||
{
|
||||
// TODO: Support unsigned byte/unsigned int
|
||||
TRACELOG(LOG_WARNING, "MODEL: [%s] glTF index data must be unsigned short", fileName);
|
||||
cgltf_accessor *attribute = data->meshes[i].primitives[p].attributes[j].data;
|
||||
|
||||
if ((attribute->component_type == cgltf_component_type_r_8u) && (attribute->type == cgltf_type_vec4))
|
||||
{
|
||||
// Init raylib mesh color to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].colors = RL_MALLOC(attribute->count*4*sizeof(unsigned char));
|
||||
|
||||
// Load 4 components of unsigned char data type into mesh.colors
|
||||
LOAD_ATTRIBUTE(attribute, 4, unsigned char, model.meshes[primitiveIndex].colors)
|
||||
}
|
||||
else if ((attribute->component_type == cgltf_component_type_r_16u) && (attribute->type == cgltf_type_vec4))
|
||||
{
|
||||
// Init raylib mesh color to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].colors = RL_MALLOC(attribute->count*4*sizeof(unsigned char));
|
||||
|
||||
// Load data into a temp buffer to be converted to raylib data type
|
||||
unsigned short *temp = RL_MALLOC(attribute->count*4*sizeof(unsigned short));
|
||||
LOAD_ATTRIBUTE(attribute, 4, unsigned short, temp);
|
||||
|
||||
// Convert data to raylib color data type (4 bytes)
|
||||
for (int c = 0; c < attribute->count*4; c++) model.meshes[primitiveIndex].colors[c] = (unsigned char)(((float)temp[c]/65535.0f)*255.0f);
|
||||
|
||||
RL_FREE(temp);
|
||||
}
|
||||
else if ((attribute->component_type == cgltf_component_type_r_32f) && (attribute->type == cgltf_type_vec4))
|
||||
{
|
||||
// Init raylib mesh color to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].colors = RL_MALLOC(attribute->count*4*sizeof(unsigned char));
|
||||
|
||||
// Load data into a temp buffer to be converted to raylib data type
|
||||
float *temp = RL_MALLOC(attribute->count*4*sizeof(float));
|
||||
LOAD_ATTRIBUTE(attribute, 4, float, temp);
|
||||
|
||||
// Convert data to raylib color data type (4 bytes), we expect the color data normalized
|
||||
for (int c = 0; c < attribute->count*4; c++) model.meshes[primitiveIndex].colors[c] = (unsigned char)(temp[c]*255.0f);
|
||||
|
||||
RL_FREE(temp);
|
||||
}
|
||||
else TRACELOG(LOG_WARNING, "MODEL: [%s] Color attribute data format not supported", fileName);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// Unindexed mesh
|
||||
model.meshes[primitiveIndex].triangleCount = model.meshes[primitiveIndex].vertexCount/3;
|
||||
|
||||
// TODO: Additional attributes that could be supported (some related to animations):
|
||||
// cgltf_attribute_type_tangent, cgltf_attribute_type_joints, cgltf_attribute_type_weights
|
||||
}
|
||||
|
||||
if (data->meshes[i].primitives[p].material)
|
||||
// Load primitive indices data (if provided)
|
||||
cgltf_accessor *attribute = data->meshes[i].primitives[p].indices;
|
||||
|
||||
if (attribute != NULL)
|
||||
{
|
||||
// Compute the offset
|
||||
model.meshMaterial[primitiveIndex] = (int)(data->meshes[i].primitives[p].material - data->materials);
|
||||
model.meshes[primitiveIndex].triangleCount = (int)attribute->count/3;
|
||||
|
||||
if (attribute->component_type == cgltf_component_type_r_16u)
|
||||
{
|
||||
// Init raylib mesh indices to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].indices = RL_MALLOC(attribute->count*sizeof(unsigned short));
|
||||
|
||||
// Load unsigned short data type into mesh.indices
|
||||
LOAD_ATTRIBUTE(attribute, 1, unsigned short, model.meshes[primitiveIndex].indices)
|
||||
}
|
||||
else if (attribute->component_type == cgltf_component_type_r_32u)
|
||||
{
|
||||
// Init raylib mesh indices to copy glTF attribute data
|
||||
model.meshes[primitiveIndex].indices = RL_MALLOC(attribute->count*sizeof(unsigned short));
|
||||
|
||||
// Load data into a temp buffer to be converted to raylib data type
|
||||
unsigned int *temp = RL_MALLOC(attribute->count*sizeof(unsigned int));
|
||||
LOAD_ATTRIBUTE(attribute, 1, unsigned int, temp);
|
||||
|
||||
// Convert data to raylib indices data type (unsigned short)
|
||||
for (int d = 0; d < attribute->count; d++) model.meshes[primitiveIndex].indices[d] = (unsigned short)temp[d];
|
||||
|
||||
TRACELOG(LOG_WARNING, "MODEL: [%s] Indices data converted from u32 to u16, possible loss of data", fileName);
|
||||
|
||||
RL_FREE(temp);
|
||||
}
|
||||
else TRACELOG(LOG_WARNING, "MODEL: [%s] Indices data format not supported, use u16", fileName);
|
||||
}
|
||||
else
|
||||
else model.meshes[primitiveIndex].triangleCount = model.meshes[primitiveIndex].vertexCount/3; // Unindexed mesh
|
||||
|
||||
// Assign to the primitive mesh the corresponding material index
|
||||
// NOTE: If no material defined, mesh uses the already assigned default material (index: 0)
|
||||
for (int m = 0; m < data->materials_count; m++)
|
||||
{
|
||||
model.meshMaterial[primitiveIndex] = model.materialCount - 1;;
|
||||
// The primitive actually keeps the pointer to the corresponding material,
|
||||
// raylib instead assigns to the mesh the by its index, as loaded in model.materials array
|
||||
// To get the index, we check if material pointers match and we assign the corresponding index,
|
||||
// skipping index 0, the default material
|
||||
if (&data->materials[i] == data->meshes[i].primitives[p].material) model.meshMaterial[primitiveIndex] = m + 1;
|
||||
}
|
||||
|
||||
primitiveIndex++;
|
||||
primitiveIndex++; // Move to next primitive
|
||||
}
|
||||
}
|
||||
|
||||
// Free all cgltf loaded data
|
||||
cgltf_free(data);
|
||||
}
|
||||
else TRACELOG(LOG_WARNING, "MODEL: [%s] Failed to load glTF data", fileName);
|
||||
|
||||
RL_FREE(fileData);
|
||||
// WARNING: cgltf requires the file pointer available while reading data
|
||||
UnloadFileData(fileData);
|
||||
|
||||
return model;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user