mesh loading

.gitignore

@@ -0,0 +1,2 @@
+# assets
+*.blend1

.gitmodules

@@ -4,3 +4,6 @@
 [submodule "src/dependency/SDL"]
 	path = src/dependency/SDL
 	url = https://github.com/libsdl-org/SDL
+[submodule "src/dependency/tinygltf"]
+	path = src/dependency/tinygltf
+	url = https://github.com/syoyo/tinygltf

src/CMakeLists.txt

@@ -24,7 +24,8 @@ set_property(TARGET PuzGameEngine PROPERTY CXX_STANDARD 17)
 
 # Game
 file(GLOB_RECURSE sources_game game/*.cpp game/*.h)
-add_library(PuzGame SHARED ${sources_game})
+file(GLOB source_singleheader dependency/tinygltf/stb_image.h dependency/tinygltf/stb_image_write.h dependency/tinygltf/json.hpp dependency/tinygltf/tiny_gltf.h)
+add_library(PuzGame SHARED ${sources_game} ${source_singleheader})
 set_property(TARGET PuzGame PROPERTY CXX_STANDARD 17)
 
 # SDL
@@ -35,6 +36,7 @@ SET(BGFX_BUILD_TOOLS ON)
 SET(BGFX_BUILD_EXAMPLES OFF)
 add_subdirectory("${CMAKE_SOURCE_DIR}/dependency/bgfx.cmake")
 
+# Link
 target_link_libraries(PuzGame bx bimg bgfx)
 target_link_libraries(PuzGameEngine bx SDL3::SDL3)
 set_target_properties(PuzGame PROPERTIES OUTPUT_NAME "PuzGame2")

src/engine/main.cpp

@@ -18,8 +18,6 @@
 
 //#define VISUAL_STUDIO
 
-constexpr UINT WM_CUSTOM_DLL_CHANGE = WM_USER + 1;
-
 #ifdef VISUAL_STUDIO
 constexpr const char* DLLPath = "PuzGame.dll";
 constexpr const wchar_t* DLLWatch = L"PuzGame2.dll";
@@ -250,7 +248,7 @@ int main()
 	
 	bx::strCopy(DevData.FileWatcher.DLLWatcher.DirPath, sizeof(DevData.FileWatcher.DLLWatcher.DirPath), "cmake-build");
 	bx::strCopy(DevData.FileWatcher.ShaderWatcher.DirPath, sizeof(DevData.FileWatcher.ShaderWatcher.DirPath), "game/shaders");
-	bx::strCopy(DevData.FileWatcher.CompiledShaderWatcher.DirPath, sizeof(DevData.FileWatcher.CompiledShaderWatcher.DirPath), "game/compiled-shaders");
+	bx::strCopy(DevData.FileWatcher.CompiledShaderWatcher.DirPath, sizeof(DevData.FileWatcher.CompiledShaderWatcher.DirPath), "game/compiled-shaders/dx11");
 
 	wcscpy(DevData.FileWatcher.DLLWatcher.CompName, DLLWatch);
 	

src/game/Mesh.cpp

@@ -0,0 +1,61 @@
+#include "Mesh.h"
+#include "Log.h"
+
+#define TINYGLTF_IMPLEMENTATION
+#define STB_IMAGE_IMPLEMENTATION
+#define STB_IMAGE_WRITE_IMPLEMENTATION
+#include "../dependency/tinygltf/tiny_gltf.h"
+
+namespace Game
+{
+	void LoadMesh(Model& mesh)
+	{
+		mesh.VertLayout.begin()
+			.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
+			.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
+			.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Float)
+			.end();
+
+		tinygltf::Model model;
+		tinygltf::TinyGLTF loader;
+		std::string warn;
+		std::string err;
+		bool loadSuccess = loader.LoadASCIIFromFile(&model, &err, &warn, "models/cube.gltf");
+
+		if (!warn.empty()) Log("WARN: %s", warn.c_str());
+		if (!err.empty()) Log("ERR: %s", err.c_str());
+		if (!loadSuccess) Log("Model load failed!");
+
+		tinygltf::Primitive primitive = model.meshes[0].primitives[0];
+		{
+			tinygltf::Accessor accessor = model.accessors.at(primitive.indices);
+			tinygltf::BufferView bufferView = model.bufferViews.at(accessor.bufferView);
+			tinygltf::Buffer buffer = model.buffers[bufferView.buffer];
+			const bgfx::Memory* ibMem = bgfx::alloc(bufferView.byteLength);
+			bx::memCopy(ibMem->data, &buffer.data.at(bufferView.byteOffset), bufferView.byteLength);
+			mesh.IndexBuffer = bgfx::createIndexBuffer(ibMem);
+		}
+		{
+			tinygltf::Accessor posAccessor = model.accessors.at(primitive.attributes.at("POSITION"));
+			tinygltf::Accessor uvAccessor = model.accessors.at(primitive.attributes.at("TEXCOORD_0"));
+			tinygltf::BufferView posBufferView = model.bufferViews[posAccessor.bufferView];
+			tinygltf::BufferView uvBufferView = model.bufferViews[uvAccessor.bufferView];
+			int posStride = posAccessor.ByteStride(posBufferView);
+			int uvStride = uvAccessor.ByteStride(uvBufferView);
+			tinygltf::Buffer posBuffer = model.buffers[posBufferView.buffer];
+			tinygltf::Buffer uvBuffer = model.buffers[uvBufferView.buffer];
+		
+			uint32_t vertexCount = posBufferView.byteLength / posStride;
+			const bgfx::Memory* vbMem = bgfx::alloc(vertexCount * sizeof(PosColorVertex));
+		
+			for (uint32_t i = 0; i < vertexCount; ++i)
+			{
+				PosColorVertex& v = *reinterpret_cast<PosColorVertex*>(vbMem->data + i * sizeof(PosColorVertex));
+				bx::memCopy(&v.x, &posBuffer.data.at(posBufferView.byteOffset + i * posStride), posStride);
+				v.abgr = 0;
+				bx::memCopy(&v.uv_x, &uvBuffer.data.at(uvBufferView.byteOffset + i * uvStride), uvStride);
+			}
+			mesh.VertexBuffer = bgfx::createVertexBuffer(vbMem, mesh.VertLayout);
+		}
+	}
+}

src/game/Mesh.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include "rendering/Rendering.h"
+
+namespace Game
+{
+	void LoadMesh(Model& mesh);
+}

src/game/rendering/Rendering.cpp

@@ -3,6 +3,7 @@
 #include "../../engine/Shared.h"
 #include "../Global.h"
 #include "../Instance.h"
+#include "../Mesh.h"
 #include "bgfx/defines.h"
 #include "bx/timer.h"
 #include <bx/file.h>
@@ -13,44 +14,6 @@ using namespace std::chrono_literals;
 
 namespace Game
 {
-	struct PosColorVertex
-	{
-		float x;
-		float y;
-		float z;
-		uint32_t abgr;
-		float uv_x;
-		float uv_y;
-	};
-
-	static PosColorVertex cubeVertices[] =
-	{
-		{-1.0f,  1.0f,  1.0f, 0xff000000, 0.0f, 0.0f },
-		{ 1.0f,  1.0f,  1.0f, 0xff0000ff, 0.0f, 0.0f },
-		{-1.0f, -1.0f,  1.0f, 0xff00ff00, 0.0f, 0.0f },
-		{ 1.0f, -1.0f,  1.0f, 0xff00ffff, 0.0f, 0.0f },
-		{-1.0f,  1.0f, -1.0f, 0xffff0000, 0.0f, 0.0f },
-		{ 1.0f,  1.0f, -1.0f, 0xffff00ff, 0.0f, 0.0f },
-		{-1.0f, -1.0f, -1.0f, 0xffffff00, 0.0f, 0.0f },
-		{ 1.0f, -1.0f, -1.0f, 0xffffffff, 0.0f, 0.0f },
-	};
-
-	static const uint16_t cubeTriList[] =
-	{
-		0, 1, 2,
-		1, 3, 2,
-		4, 6, 5,
-		5, 6, 7,
-		0, 2, 4,
-		4, 2, 6,
-		1, 5, 3,
-		5, 7, 3,
-		0, 4, 1,
-		4, 5, 1,
-		2, 3, 6,
-		6, 3, 7,
-	};
-
 	namespace
 	{
 		static const bgfx::Memory* loadMem(bx::FileReaderI* _reader, const bx::FilePath& _filePath)
@@ -121,7 +84,7 @@ namespace Game
 		}
 	}
 
-	void GameRendering::Setup()
+		void GameRendering::Setup()
 	{
 		Log("Game rendering setup...");
 		SharedData& shared = GetShared();
@@ -150,14 +113,8 @@ namespace Game
 		bgfx::setDebug(BGFX_DEBUG_TEXT);
 		bgfx::setViewClear(0, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH, 0x303030ff, 1.0f, 0);
 
-		Models[0].VertLayout.begin()
-			.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
-			.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
-			.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Float)
-			.end();
-
-		Models[0].VertexBuffer = bgfx::createVertexBuffer(bgfx::makeRef(cubeVertices, sizeof(cubeVertices)), Models[0].VertLayout);
-		Models[0].IndexBuffer = bgfx::createIndexBuffer(bgfx::makeRef(cubeTriList, sizeof(cubeTriList)));
+		LoadMesh(Models[0]);
+		
 		bgfx::ShaderHandle vertexShader = loadShader("vert");
 		bgfx::ShaderHandle fragmentShader = loadShader("frag");
 		
@@ -196,11 +153,11 @@ namespace Game
 				if (isValid(newProgram))
 				{
 					Materials[0].Shader = newProgram;
-	            }
-	            else
-	            {
-	            	Log("Failed to load shader!");
-	            }
+				}
+				else
+				{
+					Log("Failed to load shader!");
+				}
 			}
 		}
 

src/game/rendering/Rendering.h

@@ -5,12 +5,14 @@
 
 namespace Game
 {
-	struct VertexData
+	struct PosColorVertex
 	{
-		float X;
-		float Y;
-		float Z;
-		uint32_t VertCol;
+		float x;
+		float y;
+		float z;
+		uint32_t abgr;
+		float uv_x;
+		float uv_y;
 	};
 
 	struct BgfxCallback : public bgfx::CallbackI

src/game/shaders/frag.sc

@@ -6,11 +6,13 @@ $input v_uv0
 float circle(vec2 uv, vec2 center, float size)
 {
 	vec2 relPos = uv - center;
-	vec2 distSq = relPos.x * relPos.x + relPos.y * relPos.y;
+	float distSq = relPos.x * relPos.x + relPos.y * relPos.y;
 	return sqrt(distSq) <= size ? 1.0 : 0.0;
 }
 
 void main()
 {
-	gl_FragColor = circle(v_uv0, vec2(0.5, 0.5), 0.5);
+	// gl_FragColor = circle(v_uv0, vec2(0.5, 0.5), 1.0);
+	float color = v_uv0.x < 0.5 && v_uv0.y < 0.5;
+	gl_FragColor = vec4(color, color, color, 1.0);
 }

src/models/cube.gltf

@@ -0,0 +1,104 @@
+{
+	"asset":{
+		"generator":"Khronos glTF Blender I/O v4.3.47",
+		"version":"2.0"
+	},
+	"scene":0,
+	"scenes":[
+		{
+			"name":"Scene",
+			"nodes":[
+				0
+			]
+		}
+	],
+	"nodes":[
+		{
+			"mesh":0,
+			"name":"Cube"
+		}
+	],
+	"meshes":[
+		{
+			"name":"Cube",
+			"primitives":[
+				{
+					"attributes":{
+						"POSITION":0,
+						"NORMAL":1,
+						"TEXCOORD_0":2
+					},
+					"indices":3
+				}
+			]
+		}
+	],
+	"accessors":[
+		{
+			"bufferView":0,
+			"componentType":5126,
+			"count":24,
+			"max":[
+				1,
+				1,
+				1
+			],
+			"min":[
+				-1,
+				-1,
+				-1
+			],
+			"type":"VEC3"
+		},
+		{
+			"bufferView":1,
+			"componentType":5126,
+			"count":24,
+			"type":"VEC3"
+		},
+		{
+			"bufferView":2,
+			"componentType":5126,
+			"count":24,
+			"type":"VEC2"
+		},
+		{
+			"bufferView":3,
+			"componentType":5123,
+			"count":36,
+			"type":"SCALAR"
+		}
+	],
+	"bufferViews":[
+		{
+			"buffer":0,
+			"byteLength":288,
+			"byteOffset":0,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteLength":288,
+			"byteOffset":288,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteLength":192,
+			"byteOffset":576,
+			"target":34962
+		},
+		{
+			"buffer":0,
+			"byteLength":72,
+			"byteOffset":768,
+			"target":34963
+		}
+	],
+	"buffers":[
+		{
+			"byteLength":840,
+			"uri":"cube.bin"
+		}
+	]
+}