debug tinygltf structure

examples/render_groups/main.cpp

@@ -178,12 +178,9 @@ main()
 	renDoRenderLoop(rs, 60, doFrameCallbackPre);
 #endif
 	rs->arena = arenaInit();
-	rs->asset_list =
-		(render_asset*) arenaAllocateBlock(rs->arena, sizeof(render_asset));
-	// TODO: need to update render_asset->next somewhere
-
-	render_asset* rass =
-		assetLoadFromFile(rs->arena, "../data/blender/icosphere.gltf");
+	rs->models = assetLoadFromFile(rs->arena, "../data/blender/icosphere.gltf");
+	assert(rs->models != nullptr);
+	// TODO: need to update model->next somewhere
 
 	renShutdown(rs);
 	return 0;

include/asset.h

@@ -8,27 +8,31 @@
 #include "util_image.h"
 
 
-struct mesh_asset
+// NOTE: wrapper tinygltf https://github.com/syoyo/tinygltf
+// 	https://github.com/KhronosGroup/glTF
+
+struct mesh
 {
-	uint asset_size;
 	uint num_vertices;
 	uint num_indices;
-	mesh_asset* next;
-	glm::mat4 model_transform;
 	glm::vec3* vertices;
+	glm::vec3* normals;
 	uint* indices;
+	// FIXME: will have to use vec2 here to be able to use memcpy
+	// 	this will break render_object::initGLFLoatBuffer logic which expects
+	// 	vec3
 	glm::vec3* texture_coords;
+	glm::mat4 xform;
 };
 
 #define MAX_PATH_SIZE 256
-struct render_asset
+struct model
 {
-	uint total_size;
 	uint num_meshes;
-	uint name_len;
-	render_asset* next;
+	model* next;
 	char* filepath;
-	mesh_asset* meshes; // NOTE: fixed sized array
+	uint64_t filepath_hash;
+	mesh* meshes; // NOTE: fixed sized array
 	// NOTE: pointer to a texture in render_state->textures
 	util_image* diffuse_texture;
 	// FIXME: node_animation has a pointer to a render_object. need to decouple
@@ -36,6 +40,6 @@ struct render_asset
 	//node_animation* node_anim;
 };
 
-render_asset*
+model*
 assetLoadFromFile(memory_arena* arena, const char* filename);
 

include/renderer.h

@@ -56,7 +56,7 @@ struct render_state
 	uint render_group_count;
 
 	// WIP
-	render_asset* asset_list; // NOTE: head pointer of linked list
+	model* models; // NOTE: head pointer of linked list
 	memory_arena* arena;
 	// FIXME: should be a hashmap for textures loaded from assets
 	// 	ie) pallete textures

src/asset.cpp

@@ -1,5 +1,6 @@
 
-#include <iostream>
+#include <cassert>
+#include <cstring>
 
 #define TINYGLTF_IMPLEMENTATION
 //#define STB_IMAGE_IMPLEMENTATION
@@ -42,41 +43,48 @@ getComponentType(int componentType)
 		case 5130: return "TINYGLTF_COMPONENT_TYPE_DOUBLE";
 		default: return "UNKOWN"; }
 }
-render_asset*
+
+model*
 assetLoadFromFile(memory_arena* arena, const char* filename)
 {
-	tinygltf::Model model;
-	// TODO: see if there's any impact in creating a new context for each file
+	tinygltf::Model mdl;
 	tinygltf::TinyGLTF gltf_ctx;
 	std::string err;
 	std::string warn;
 
-	if (!gltf_ctx.LoadASCIIFromFile(&model, &err, &warn, filename)) {
+	if (!gltf_ctx.LoadASCIIFromFile(&mdl, &err, &warn, filename)) {
 		LOG(Error) << "Error loading file: " << filename << "\n";
 		return nullptr;
 	}
 
-	uint buf_count = model.bufferViews.size();
-	render_asset* ra =
-		(render_asset*) arenaAllocateBlock(arena, sizeof(render_asset));
-	ra->meshes =
-		(mesh_asset*) arenaAllocateBlock(arena, buf_count * sizeof(mesh_asset));
+	uint buf_count = mdl.bufferViews.size();
+	model* ra = (model*) arenaAllocateBlock(arena, sizeof(model));
+	ra->meshes = (mesh*) arenaAllocateBlock(arena, buf_count * sizeof(mesh));
+	ra->num_meshes = mdl.meshes.size();
+	uint name_len = std::strlen(filename);
+	assert(name_len < MAX_PATH_SIZE);
+	ra->filepath = (char*) arenaAllocateBlock(arena, name_len + 1);
+	std::strncpy(ra->filepath, filename, name_len);
+	ra->filepath_hash = utilFNV64a_str(ra->filepath);
 
-	for (uint i = 0; i < model.accessors.size(); i++) {
-		tinygltf::Accessor acc = model.accessors[i];
-		size_t bv_idx = acc.bufferView;
-		assert(bv_idx >= 0 && bv_idx < model.bufferViews.size());
-		tinygltf::BufferView bv = model.bufferViews[bv_idx];
+	// FIXME: need to recreate node hierarchy
+	for (tinygltf::Node node : mdl.nodes) {
+		for (tinygltf::Accessor acc : mdl.accessors) {
+			size_t bv_idx = acc.bufferView;
+			assert(bv_idx >= 0 && bv_idx < mdl.bufferViews.size());
+			tinygltf::BufferView bv = mdl.bufferViews[bv_idx];
 
-		LOG(Debug) << "-----------------------\n";
-		LOG(Debug) << "buf idx: " << i << "\n";
-		LOG(Debug) << "buf target: " << getTargetStr(bv.target) << "\n";
-		LOG(Debug) << "buf len: " << bv.byteLength << "\n";
-		LOG(Debug) << "buf offset: " << bv.byteOffset << "\n";
-		LOG(Debug) << "buf stride: " << bv.byteStride << "\n";
-		LOG(Debug) << "buf component type: "
-			<< getComponentType(acc.componentType) << "\n";
-		LOG(Debug) << "buf element type: " << getElementType(acc.type) << "\n";
+			LOG(Debug) << "-----------------------\n";
+			LOG(Debug) << "buf idx: " << bv_idx << "\n";
+			LOG(Debug) << "buf target: " << getTargetStr(bv.target) << "\n";
+			LOG(Debug) << "buf len: " << bv.byteLength << "\n";
+			LOG(Debug) << "buf offset: " << bv.byteOffset << "\n";
+			LOG(Debug) << "buf stride: " << bv.byteStride << "\n";
+			LOG(Debug) << "acc component type: "
+				<< getComponentType(acc.componentType) << "\n";
+			LOG(Debug) << "acc element type: "
+				<< getElementType(acc.type) << "\n";
+		}
 	}
 
 	return ra;