basic 3D zombie model

include/td/render/Renderer.h

@@ -1,10 +1,11 @@
 #pragma once
 
 #include <memory>
+#include <td/misc/SlotGuard.h>
 #include <td/render/Camera.h>
+#include <td/render/loader/FbxLoader.h>
 #include <td/render/loader/GLLoader.h>
 #include <td/render/shader/CameraShaderProgram.h>
-#include <td/misc/SlotGuard.h>
 
 namespace td {
 namespace render {
@@ -15,6 +16,7 @@ class BasicRenderer {
 	virtual ~BasicRenderer() {}
 
 	void Render(const GL::VertexArray& a_Vao);
+	void Render(const Model& a_Model);
 };
 
 template <typename TShader>
@@ -66,7 +68,7 @@ class RenderPipeline {
 
 template <typename TShader>
 Renderer<TShader>::Renderer(Camera& a_Camera) : m_Shader(std::make_unique<TShader>()), m_Camera(a_Camera) {
-	Connect(a_Camera.OnPerspectiveChange, [this](){
+	Connect(a_Camera.OnPerspectiveChange, [this]() {
 		m_Shader->Start();
 		m_Shader->SetProjectionMatrix(m_Camera.GetProjectionMatrix());
 	});

include/td/render/loader/FbxLoader.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <td/render/loader/GLLoader.h>
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace td {
+
+struct Model {
+	std::vector<std::unique_ptr<GL::VertexArray>> m_Vaos;
+};
+
+namespace ModelLoader {
+
+Model LoadModel(const std::string& fileName);
+
+}
+}

include/td/render/renderer/EntityRenderer.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <td/render/loader/FbxLoader.h>
 #include <td/render/Renderer.h>
 #include <td/render/shader/EntityShader.h>
 #include <td/game/World.h>
@@ -10,7 +11,7 @@ namespace render {
 class EntityRenderer : public Renderer<shader::EntityShader> {
   private:
 	game::WorldPtr m_World;
-	std::unique_ptr<GL::VertexArray> m_EntityVao;
+	Model m_EntityModel;
 
   public:
 	EntityRenderer(Camera& a_Camera, const game::WorldPtr& a_World);

src/td/render/Renderer.cpp

@@ -8,10 +8,17 @@ namespace render {
 void BasicRenderer::Render(const GL::VertexArray& a_Vao) {
 	a_Vao.Bind();
 	glDrawArrays(GL_TRIANGLES, 0, a_Vao.GetVertexCount());
-	// glDrawElements(GL_TRIANGLES, a_Vao.GetVertexCount(), GL_UNSIGNED_INT, nullptr);
 	a_Vao.Unbind();
 }
 
+void BasicRenderer::Render(const Model& a_Model) {
+	for (const auto& vao : a_Model.m_Vaos) {
+		vao->Bind();
+		glDrawElements(GL_TRIANGLES, vao->GetVertexCount(), GL_UNSIGNED_INT, nullptr);
+		vao->Unbind();
+	}
+}
+
 RenderPipeline::RenderPipeline() {
 	glEnable(GL_TEXTURE_2D);
 	glEnable(GL_BLEND);

src/td/render/loader/FbxLoader.cpp

@@ -0,0 +1,128 @@
+#include <td/render/loader/FbxLoader.h>
+
+#include <assimp/Importer.hpp>	 // C++ importer interface
+#include <assimp/postprocess.h>	 // Post processing flags
+#include <assimp/scene.h>		 // Output data structure
+#include <iostream>
+#include <memory>
+#include <sp/common/DataBuffer.h>
+#include <td/render/loader/GLLoader.h>
+#include <vector>
+
+#define VERTEX_SIZE 3
+#define UV_SIZE 2
+
+#define VERTEX_POSITION_INDEX 0
+#define VERTEX_UV_INDEX 1
+#define VERTEX_NORMAL_INDEX 2
+
+namespace td {
+namespace ModelLoader {
+
+static std::unique_ptr<GL::VertexArray> ProcessMesh(aiMesh* mesh, const aiScene* scene, const aiMatrix4x4& transform) {
+	std::vector<float> positions;
+	std::vector<float> textureCoords;
+	std::vector<float> normals;
+
+	std::vector<unsigned int> indicies;
+
+	aiFace* faces = mesh->mFaces;
+	std::size_t faceNumber = mesh->mNumFaces;
+
+	for (std::size_t j = 0; j < faceNumber; j++) {
+		std::size_t offset = indicies.size();
+		std::size_t numIndices = faces[j].mNumIndices;
+
+		indicies.resize(indicies.size() + numIndices);
+		std::memcpy(indicies.data() + offset, faces[j].mIndices, numIndices * sizeof(unsigned int));
+	}
+
+	std::size_t vertNumber = mesh->mNumVertices;
+	aiVector3D* vertecies = mesh->mVertices;
+
+	for (std::size_t j = 0; j < vertNumber; j++) {
+		aiVector3D vertex = transform * vertecies[j];
+
+		positions.push_back(vertex.x);
+		positions.push_back(vertex.y);
+		positions.push_back(vertex.z);
+	}
+
+	if (mesh->HasNormals()) {
+		aiVector3D* vertexNormals = mesh->mNormals;
+
+		for (std::size_t j = 0; j < vertNumber; j++) {
+			aiVector3D normal = transform * vertexNormals[j];
+
+			normals.push_back(normal.x);
+			normals.push_back(normal.y);
+			normals.push_back(normal.z);
+		}
+	}
+
+	aiVector3D** vertexTexture = mesh->mTextureCoords;
+
+	for (std::size_t j = 0; j < vertNumber; j++) {
+		textureCoords.push_back(vertexTexture[0][j].x);
+		textureCoords.push_back(vertexTexture[0][j].y);
+	}
+
+	GL::VertexBuffer positionVBO(positions, VERTEX_SIZE);
+	positionVBO.AddVertexAttribPointer(VERTEX_POSITION_INDEX, VERTEX_SIZE, 0);
+
+	GL::VertexBuffer textureVBO(textureCoords, UV_SIZE);
+	textureVBO.AddVertexAttribPointer(VERTEX_UV_INDEX, UV_SIZE, 0);
+
+	GL::VertexBuffer normalVBO(normals, VERTEX_SIZE);
+	normalVBO.AddVertexAttribPointer(VERTEX_NORMAL_INDEX, VERTEX_SIZE, 0);
+
+	auto Vao = std::make_unique<GL::VertexArray>(GL::ElementBuffer{indicies});
+	Vao->Bind();
+	Vao->BindVertexBuffer(std::move(positionVBO));
+	Vao->BindVertexBuffer(std::move(textureVBO));
+	Vao->BindVertexBuffer(std::move(normalVBO));
+	Vao->Unbind();
+
+	return Vao;
+}
+
+static void ProcessNode(
+	aiNode* node, const aiScene* scene, std::vector<std::unique_ptr<GL::VertexArray>>& meshes, const aiMatrix4x4& transform) {
+	// recursive
+	for (unsigned int i = 0; i < node->mNumChildren; i++) {
+		ProcessNode(node->mChildren[i], scene, meshes, transform * node->mTransformation);
+	}
+
+	for (unsigned int i = 0; i < node->mNumMeshes; i++) {
+		aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
+		meshes.push_back(ProcessMesh(mesh, scene, transform * node->mTransformation));
+	}
+}
+
+Model LoadModel(const std::string& fileName) {
+	// DataBuffer fileData = utils::AssetsManager::GetAsset(fileName);
+	sp::DataBuffer fileData;
+	fileData.ReadFile(fileName);
+
+	Assimp::Importer importer;
+
+	const aiScene* scene = importer.ReadFile(fileName, aiProcess_CalcTangentSpace | aiProcess_Triangulate | aiProcess_SortByPType |
+														   aiProcess_OptimizeGraph | aiProcess_OptimizeMeshes | aiProcess_GlobalScale);
+
+	if (!scene) {
+		std::cerr << "[ModelLoader] Failed to load model !\n";
+		return {};
+	}
+
+	// utils::LOGD(utils::Format("[ModelLoader]\tModel nodes : %i", scene->mRootNode->mNumMeshes));
+
+	Model model;
+	ProcessNode(scene->mRootNode, scene, model.m_Vaos, {});
+
+	std::cout << "Loaded " << model.m_Vaos.size() << " vaos !\n";
+
+	return model;
+}
+
+}  // namespace ModelLoader
+}  // namespace td

src/td/render/renderer/EntityRenderer.cpp

@@ -1,3 +1,4 @@
+#include "td/render/Renderer.h"
 #include <td/render/renderer/EntityRenderer.h>
 
 #include <td/render/loader/WorldLoader.h>
@@ -6,7 +7,7 @@ namespace td {
 namespace render {
 
 EntityRenderer::EntityRenderer(Camera& a_Camera, const game::WorldPtr& a_World) : Renderer(a_Camera), m_World(a_World) {
-	m_EntityVao = std::make_unique<GL::VertexArray>(WorldLoader::LoadMobModel());
+	m_EntityModel = ModelLoader::LoadModel("assets/zombie.fbx");
 	m_Shader->Start();
 	m_Shader->SetColorEffect({1, 0, 1});
 }
@@ -23,7 +24,7 @@ void EntityRenderer::Render(float a_Lerp) {
 		float z = Lerp<game::Mob>(*mob, a_Lerp, [](const game::Mob& a_Mob) { return static_cast<float>(a_Mob.m_Position.y); });
 
 		m_Shader->SetModelPos({x, .001, z});
-		Renderer::Render(*m_EntityVao);
+		Renderer::Render(m_EntityModel);
 	}
 }
 

xmake.lua

@@ -3,7 +3,7 @@ add_rules("mode.debug", "mode.release")
 add_repositories("persson-repo https://git.ale-pri.com/Persson-dev/xmake-repo.git")
 
 add_requires("imgui 1.92.0", {configs = {sdl3 = true, opengl3 = true}})
-add_requires("libsdl3 3.2.16", "splib 2.3.2", "zlib", "glew", "fpm", "enet6")
+add_requires("libsdl3 3.2.16", "splib 2.3.2", "zlib", "glew", "fpm", "enet6", "assimp")
 
 set_languages("c++20")
 
@@ -21,7 +21,7 @@ target("Tower-Defense2")
     add_includedirs("include", {public = true})
     set_kind("binary")
     add_files("src/**.cpp")
-    add_packages("libsdl3", "imgui", "glew", "splib", "zlib", "fpm", "enet6", {public = true})
+    add_packages("libsdl3", "imgui", "glew", "splib", "zlib", "fpm", "assimp", "enet6", {public = true})
     set_rundir(".")
     add_defines("TD_GL_LOADER_GLEW")