Should be able to load models now.

CMakeLists.txt

@@ -42,8 +42,11 @@ include_directories(
 	SYSTEM ${SDL2_INCLUDE_DIRS})
 
 set(SRCS
+	"src/AssetManager.cpp"
 	"src/Logger.cpp"
 	"src/Main.cpp"
+	"src/Model.cpp"
+	"src/Shader.cpp"
 	"src/System.cpp")
 
 # Define C++ compiler flags

assets/shaders/fragment_shader.glsl

@@ -0,0 +1,7 @@
+#version 330 core
+in vec3 frag_col;
+out vec3 col;
+
+void main() {
+	col = frag_col;
+}

assets/shaders/vertex_shader.glsl

@@ -0,0 +1,9 @@
+#version 330 core
+layout(location = 0) in vec3 vert_pos;
+uniform vec3 col;
+/*uniform mat4 mvp;*/
+out vec3 frag_col;
+void main() {
+	gl_Position = /*mvp * */vec4(vert_pos, 1);
+	frag_col = col;
+}

src/AssetManager.cpp

@@ -18,7 +18,132 @@
 
 #include "AssetManager.hpp"
 
-void AssetManager::loadOBJ(const std::string &path,
+#include "System.hpp"
+
+#include <vector>
+#include <stdio.h>
+
+//#define TINYOBJLOADER_IMPLEMENTATION
+//#include <tiny_obj_loader.h>
+#include <glm/glm.hpp>
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+#include <assimp/postprocess.h>
+
+/*void AssetManager::loadOBJ(const std::string &path,
 		const std::string &name)
 {
+	std::vector<unsigned int> vertexIndices,
+		uvIndices, normalIndices;
+	std::vector<glm::vec3> temp_vertices;
+	std::vector<glm::vec2> temp_uvs;
+	std::vector<glm::vec3> temp_normals;
+
+	FILE *file = fopen(path.c_str(), "r");
+	if(not file)
+	{
+		System::logger->writeError("Failed to open file.");
+		return;
+	}
+
+	while(true)
+	{
+		char lineHeader[128];
+		int res = fscanf(file, "%s", lineHeader);
+		if(res == EOF)
+			break;
+
+		if(strcmp(lineHeader, "v") == 0)
+		{
+			glm::vec3 vertex;
+			fscanf(file, "%f %f %f\n",
+					&vertex.x, &vertex.y, &vertex.z);
+			temp_vertices.push_back(vertex);
+		}
+		else if(strcmp(lineHeader, "vt") == 0)
+		{
+			glm::vec2 uv;
+			fscanf(file, "%f %f\n", &uv.x, &uv.y);
+			temp_uvs.push_back(uv);
+		}
+		else if(strcmp(lineHeader, "vn") == 0)
+		{
+			glm::vec3 normal;
+			fscanf(file, "%f %f %f\n",
+					&normal.x, &normal.y, &normal.z);
+			temp_normals.push_back(normal);
+		}
+		else if(strcmp(lineHeader, "f") == 0)
+		{
+			std::string v1, v2, v3;
+			unsigned int vIndex[3], uvIndex[3], normIndex[3];
+			int matches = fscanf(file,
+					"%d/%d/%d %d/%d/%d %d/%d/%d\n",
+					&vIndex[0], &uvIndex[0], &normIndex[0],
+					&vIndex[1], &uvIndex[1], &normIndex[1],
+					&vIndex[2], &uvIndex[2], &normIndex[2]);
+			if(matches not_eq 9)
+			{
+				System::logger->writeError(
+						"OBJ file is too complicated.");
+				return;
+			}
+
+			for(auto &i : vIndex)
+				vertexIndices.push_back(i);
+			for(auto &i : uvIndex)
+				uvIndices.push_back(i);
+			for(auto &i : normIndex)
+				normalIndices.push_back(i);
+		}
+	}
+}*/
+
+void AssetManager::loadModel(const std::string &path,
+		const std::string &name)
+{
+	Assimp::Importer importer;
+	const aiScene *scene = importer.ReadFile(path,
+			aiProcess_Triangulate);
+	if(not scene)
+	{
+		System::logger->writeError(importer.GetErrorString());
+		return;
+	}
+	const aiMesh *mesh = scene->mMeshes[0];
+
+	std::vector<struct Vertex> vertices;
+	std::vector<unsigned int> indices;
+
+	vertices.reserve(mesh->mNumVertices);
+	for(unsigned int i = 0; i < mesh->mNumVertices; ++i)
+	{
+		aiVector3D pos = mesh->mVertices[i];
+		aiVector3D norm = mesh->mNormals[i];
+
+		vertices.push_back({
+				glm::vec3(pos.x, pos.y, pos.z),
+				glm::vec3(norm.x, norm.y, norm.z)});
+	}
+
+	indices.reserve(3 * mesh->mNumFaces);
+	for(unsigned int i = 0; i < mesh->mNumFaces; ++i)
+	{
+		for(unsigned int j = 0; j < 3; ++j)
+			indices.push_back(mesh->mFaces[i].mIndices[j]);
+	}
+
+	models.insert({ name,
+			std::make_shared<Model>(
+					vertices, indices)});
+}
+
+std::shared_ptr<Model> AssetManager::getModel(
+		const std::string &name)
+{
+	return models.at(name);
+}
+
+void AssetManager::unloadModel(const std::string &name) {
+	models.erase(name);
 }

src/AssetManager.hpp

@@ -18,17 +18,22 @@
 
 #pragma once
 
+#include "Model.hpp"
+#include <map>
+#include <memory>
 #include <string>
 
 class AssetManager {
 public:
 	AssetManager();
 
-	void loadOBJ(const std::string &path,
+	/*void loadOBJ(const std::string &path,
+			const std::string &name);*/
+	void loadModel(const std::string &path,
 			const std::string &name);
-	void loadSound(const std::string &path,
-			const std::string &name);
-	void unloadOBJ(const std::string &name);
-	void unloadSound(const std::string &name);
+	std::shared_ptr<Model> getModel(const std::string &name);
+	void unloadModel(const std::string &name);
+	//void unloadOBJ(const std::string &name);
 private:
+	std::map<std::string, std::shared_ptr<Model>> models;
 };

src/Model.cpp

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2018 Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Model.hpp"
+
+#include <GL/glew.h>
+#include <GL/gl.h>
+
+Model::Model(const std::vector<struct Vertex> &vertices,
+		const std::vector<unsigned int> &indices) :
+	vertices(vertices), indices(indices)
+{
+	glGenVertexArrays(1, &vao);
+	glGenBuffers(1, &vbo);
+	glGenBuffers(1, &ebo);
+
+	glBindVertexArray(vao);
+	glBindBuffer(GL_ARRAY_BUFFER, vbo);
+	glBufferData(GL_ARRAY_BUFFER,
+			vertices.size() * sizeof(struct Vertex),
+			&vertices[0], GL_STATIC_DRAW);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER,
+			indices.size() * sizeof(unsigned int),
+			&indices[0], GL_STATIC_DRAW);
+
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE,
+			sizeof(struct Vertex), nullptr);
+	glEnableVertexAttribArray(1);
+	glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE,
+			sizeof(struct Vertex),
+			(void*)offsetof(struct Vertex, normal));
+	glBindVertexArray(0);
+}
+
+void Model::draw(const Shader &shader) {
+	glUniform3f(
+			glGetUniformLocation(shader.getId(), "col"),
+			color.r, color.g, color.b);
+	glBindVertexArray(vao);
+	glDrawElements(GL_TRIANGLES, indices.size(),
+			GL_UNSIGNED_INT, 0);
+	glBindVertexArray(0);
+}

src/Model.hpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2018 Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "Shader.hpp"
+
+#include <vector>
+#include <glm/glm.hpp>
+
+struct Color {
+	float r;
+	float g;
+	float b;
+};
+
+struct Vertex {
+	glm::vec3 position;
+	glm::vec3 normal;
+};
+
+class Model {
+public:
+	Model(const std::vector<struct Vertex> &vertices,
+			const std::vector<unsigned int> &indices);
+	void draw(const Shader &shader);
+
+	inline void setColor(float r, float g, float b) {
+		color = { r, g, b };
+	}
+
+private:
+	struct Color color;
+	std::vector<struct Vertex> vertices;
+	std::vector<unsigned int> indices;
+	unsigned int vao, vbo, ebo;
+};

src/Shader.cpp

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2018 Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "Shader.hpp"
+#include "System.hpp"
+
+#include <fstream>
+#include <sstream>
+
+Shader::Shader(const std::string &vShaderPath,
+		const std::string &fShaderPath)
+{
+	// Load the code from the files.
+	std::string vShaderCode, fShaderCode;
+	std::ifstream vShaderFile, fShaderFile;
+	vShaderFile.exceptions(std::ifstream::failbit bitor
+			std::ifstream::badbit);
+	fShaderFile.exceptions(std::ifstream::failbit bitor
+			std::ifstream::badbit);
+	try
+	{
+		vShaderFile.open(vShaderPath);
+		fShaderFile.open(fShaderPath);
+		std::stringstream vShaderStream, fShaderStream;
+		vShaderStream << vShaderFile.rdbuf();
+		fShaderStream << fShaderFile.rdbuf();
+		vShaderFile.close();
+		fShaderFile.close();
+		vShaderCode = vShaderStream.str();
+		fShaderCode = fShaderStream.str();
+	}
+	catch(const std::exception &e)
+	{
+		System::logger->writeError(
+				std::string("Failed to read from file: ") +
+				e.what());
+	}
+
+	// Compile the shaders
+	unsigned int vertexId, fragmentId;
+	int res;
+	char infoLog[512];
+
+	vertexId = glCreateShader(GL_VERTEX_SHADER);
+	{
+		const char *vShaderCodeChar = vShaderCode.c_str();
+		glShaderSource(vertexId, 1,
+				&vShaderCodeChar, nullptr);
+	}
+	glCompileShader(vertexId);
+	glGetShaderiv(vertexId, GL_COMPILE_STATUS, &res);
+	if(not res)
+	{
+		glGetShaderInfoLog(vertexId, 512, nullptr, infoLog);
+		System::logger->writeError(
+				std::string(
+					"Vertex shader compilation failed: ") +
+				infoLog);
+	}
+	fragmentId = glCreateShader(GL_FRAGMENT_SHADER);
+	{
+		const char *fShaderCodeChar = fShaderCode.c_str();
+		glShaderSource(fragmentId, 1,
+				&fShaderCodeChar, nullptr);
+	}
+	glCompileShader(fragmentId);
+	glGetShaderiv(fragmentId, GL_COMPILE_STATUS, &res);
+	if(not res)
+	{
+		glGetShaderInfoLog(fragmentId, 512, nullptr, infoLog);
+		System::logger->writeError(
+				std::string(
+					"Fragment shader compilation failed: ") +
+				infoLog);
+	}
+
+	// Link the program
+	id = glCreateProgram();
+	glAttachShader(id, vertexId);
+	glAttachShader(id, fragmentId);
+	glLinkProgram(id);
+
+	glGetProgramiv(id, GL_LINK_STATUS, &res);
+	if(not res)
+	{
+		glGetProgramInfoLog(id, 512, nullptr, infoLog);
+		System::logger->writeError(
+				std::string("Failed to link program: ") +
+				infoLog);
+	}
+
+	// Delete the shaders
+	glDeleteShader(vertexId);
+	glDeleteShader(fragmentId);
+}

src/Shader.hpp

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018 Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ * Author: Ortega Froysa, Nicolás <nortega@themusicinnoise.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <string>
+#include <GL/glew.h>
+#include <GL/gl.h>
+
+class Shader {
+public:
+	Shader(const std::string &vShaderPath,
+			const std::string &fShaderPath);
+
+	inline void use() {
+		glUseProgram(id);
+	}
+	inline void setBool(const std::string &name,
+			bool value) const
+	{
+		glUniform1i(glGetUniformLocation(id, name.c_str()),
+				static_cast<int>(value));
+	}
+	inline void setInt(const std::string &name,
+			bool value) const
+	{
+		glUniform1i(glGetUniformLocation(id, name.c_str()),
+				value);
+	}
+	inline void setFloat(const std::string &name,
+			bool value) const
+	{
+		glUniform1f(glGetUniformLocation(id, name.c_str()),
+				value);
+	}
+	inline unsigned int getId() const {
+		return id;
+	}
+
+private:
+	unsigned int id;
+};

src/System.cpp

@@ -48,8 +48,6 @@ System::System() : running(true) {
 		exit(1);
 	}
 
-	//SDL_SetWindowFullscreen(window, SDL_WINDOW_FULLSCREEN);
-
 	glcontext = SDL_GL_CreateContext(window);
 
 	SDL_GL_SetSwapInterval(0);
@@ -61,104 +59,19 @@ System::System() : running(true) {
 		exit(1);
 	}
 
-	glGenVertexArrays(1, &vao);
-	glBindVertexArray(vao);
-
 	glEnable(GL_DEPTH_TEST);
 	glDepthFunc(GL_LESS);
 	glEnable(GL_CULL_FACE);
 
 	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
 
-	try {
-		loadShaders();
-	} catch(std::exception &e) {
-		logger->writeError(e.what());
-		exit(1);
-	}
-	matrixId = glGetUniformLocation(programId, "MVP");
-}
-
-void System::loadShaders() {
-	logger->writeDebug("Compiling shaders...");
-	GLuint vshader_id = glCreateShader(GL_VERTEX_SHADER);
-	GLuint fshader_id = glCreateShader(GL_FRAGMENT_SHADER);
-	GLint res;
-	int info_log_length = 0;
-
-	// Load/Compile vertex shader
-	glShaderSource(vshader_id, 1, &vertShader,
-			nullptr);
-	glCompileShader(vshader_id);
-	glGetShaderiv(vshader_id, GL_COMPILE_STATUS, &res);
-	glGetShaderiv(vshader_id, GL_INFO_LOG_LENGTH,
-			&info_log_length);
-	if(info_log_length > 0)
-	{
-		char *vshader_error = new char[info_log_length+1];
-		glGetShaderInfoLog(vshader_id, info_log_length,
-				nullptr, vshader_error);
-		std::string error =
-			"Vector shader compilation failed: ";
-		error.append(vshader_error);
-		delete vshader_error;
-
-		throw std::runtime_error(error);
-	}
-
-	// Load/Compile fragment shader
-	glShaderSource(fshader_id, 1, &fragShader, nullptr);
-	glCompileShader(fshader_id);
-	glGetShaderiv(fshader_id, GL_COMPILE_STATUS, &res);
-	glGetShaderiv(fshader_id, GL_INFO_LOG_LENGTH,
-			&info_log_length);
-	if(info_log_length > 0)
-	{
-		char *fshader_error = new char[info_log_length+1];
-		glGetShaderInfoLog(fshader_id, info_log_length,
-				nullptr, fshader_error);
-		std::string error =
-			"Fragment shader compilation failed: ";
-		error.append(fshader_error);
-		delete fshader_error;
-
-		throw std::runtime_error(error);
-	}
-
-	logger->writeDebug("Linking program...");
-
-	programId = glCreateProgram();
-	glAttachShader(programId, vshader_id);
-	glAttachShader(programId, fshader_id);
-	glLinkProgram(programId);
-
-	// check linkage
-	glGetProgramiv(programId, GL_LINK_STATUS, &res);
-	glGetProgramiv(programId, GL_INFO_LOG_LENGTH,
-			&info_log_length);
-	if(info_log_length > 0)
-	{
-		char *link_error = new char[info_log_length+1];
-		glGetProgramInfoLog(programId, info_log_length,
-				nullptr, link_error);
-		std::string error = "Program linking failed: ";
-		error.append(link_error);
-		delete link_error;
-
-		throw std::runtime_error(error);
-	}
-
-	// detach
-	glDetachShader(programId, vshader_id);
-	glDetachShader(programId, fshader_id);
-
-	glDeleteShader(vshader_id);
-	glDeleteShader(fshader_id);
+	shader = std::make_unique<Shader>(
+			"../assets/shaders/vertex_shader.glsl",
+			"../assets/shaders/fragment_shader.glsl");
 }
 
 System::~System() {
 	logger->write("Shutting down systems.");
-	glDeleteProgram(programId);
 	SDL_GL_DeleteContext(glcontext);
 	SDL_DestroyWindow(window);
 	SDL_Quit();
@@ -171,7 +84,7 @@ void System::run() {
 		syncInputs();
 
 		glClear(GL_COLOR_BUFFER_BIT bitor GL_DEPTH_BUFFER_BIT);
-		glUseProgram(programId);
+		shader->use();
 
 		SDL_GL_SwapWindow(window);
 

src/System.hpp

@@ -19,6 +19,7 @@
 #pragma once
 
 #include "Logger.hpp"
+#include "Shader.hpp"
 
 #include <SDL2/SDL.h>
 #include <memory>
@@ -34,28 +35,11 @@ public:
 	static std::unique_ptr<Logger> logger;
 
 private:
-	void loadShaders();
 	void syncInputs();
 
-	const GLchar *vertShader =
-			"#version 330 core\n"
-			"layout(location = 0) in vec3 vert_pos;\n"
-			"layout(location = 1) in vec3 vert_col;\n"
-			"uniform mat4 MVP;\n"
-			"out vec3 frag_col;\n"
-			"void main() {\n"
-			"gl_Position = MVP * vec4(vert_pos, 1);\n"
-			"frag_col = vert_col;}\n";
-	const GLchar *fragShader =
-			"#version 330 core\n"
-			"in vec3 frag_col;\n"
-			"out vec3 color;\n"
-			"void main() { color = frag_col; }\n";
-	GLuint programId;
-	GLuint matrixId;
 	SDL_Window *window;
 	SDL_GLContext glcontext;
-	GLuint vao;
+	std::unique_ptr<Shader> shader;
 
 	bool running;
 };