Init Repository

src/Input.c

@@ -0,0 +1,11 @@
+#include "Input.h"
+
+void key_pressed(GLFWwindow* window, int key, int scancode, int action, int mods){
+	if ( key == GLFW_KEY_ESCAPE && action == GLFW_PRESS){
+		glfwSetWindowShouldClose(window, true);	
+	}
+	if ( key == GLFW_KEY_Q && action == GLFW_PRESS ){
+		glfwSetWindowShouldClose(window, true);
+	}
+
+}

src/Input.h

@@ -0,0 +1,12 @@
+#ifndef INPUT
+#define INPUT
+
+#include <GLFW/glfw3.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+void key_pressed();
+
+
+#endif

src/Renderer.c

@@ -0,0 +1,117 @@
+#include "Renderer.h"
+
+GLFWwindow* initOpenGL() {
+	
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+	GLFWwindow* window = glfwCreateWindow(800, 600, "Hello World", NULL, NULL);
+	if(window == NULL) {
+		printf("Failed to create a window\n");
+		glfwTerminate();
+		exit(-1);
+	}
+
+	glfwMakeContextCurrent(window);
+	glfwSetFramebufferSizeCallback(window, WindowGotResized);
+
+	if(!gladLoadGLLoader( (GLADloadproc) glfwGetProcAddress )) {
+		printf("Failed to initialize GLAD");
+		exit(-1);
+	}
+
+	return window;
+}
+
+void WindowGotResized(GLFWwindow* window, int width, int height) {
+
+	glViewport(0, 0, width, height);
+}
+
+unsigned int compileShaderProgram(const char** vertexSrc, const char** fragmentSrc) {
+	unsigned int vertexShader;
+	vertexShader = glCreateShader(GL_VERTEX_SHADER);
+	glShaderSource(vertexShader, 1, vertexSrc, NULL);
+	glCompileShader(vertexShader);
+
+	int vertexSuccess;
+	char infoLog[512];
+	glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &vertexSuccess);
+	if(!vertexSuccess) {
+		glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);		
+		printf("SHADER::VERTEX::COMPILATION_FAILED\n %s \n", infoLog);
+	}
+
+	unsigned int fragmentShader;
+	fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(fragmentShader, 1, fragmentSrc, NULL);
+	glCompileShader(fragmentShader);
+
+	int fragmentSuccess;
+	glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &fragmentSuccess);
+	if(!fragmentSuccess){
+		glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
+		printf("SHADER::FRAGMENT::COMPILATION_FAILED\n %s \n", infoLog);
+	}
+
+	unsigned int shaderProgram;
+	shaderProgram = glCreateProgram();
+	glAttachShader(shaderProgram, vertexShader);
+	glAttachShader(shaderProgram, fragmentShader);
+	
+	glLinkProgram(shaderProgram);
+
+	int programSuccess;
+	glGetProgramiv(shaderProgram, GL_LINK_STATUS, &programSuccess);
+	if(!programSuccess) {
+		glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
+		printf("SHADER::PROGRAM::LINKING_FAILED\n %s \n", infoLog);
+	}
+	glDeleteShader(vertexShader);
+	glDeleteShader(fragmentShader);
+
+	return shaderProgram;
+
+}
+
+unsigned int loadCompileShader(char* vertexPath, char* fragmentPath) {
+	FILE* vertex_file = fopen(vertexPath, "r");
+	FILE* fragment_file = fopen(fragmentPath, "r");
+	if( vertex_file == NULL || fragment_file == NULL ) {
+		printf("Failed to load shaders.\n");
+		exit(1);
+	}
+
+	struct stat vertex_stat;
+	struct stat fragment_stat;
+	stat(vertexPath, &vertex_stat);
+	stat(fragmentPath, &fragment_stat);
+
+	int vertex_length = vertex_stat.st_size;
+	int fragment_length = fragment_stat.st_size;
+	
+	char* vertex_src = (char*)malloc(vertex_length+1);
+	char* fragment_src = (char*)malloc(fragment_length+1);
+	memset(vertex_src, 0, vertex_length+1);
+	memset(fragment_src, 0, fragment_length+1);
+
+	fread(vertex_src, sizeof(char), vertex_length, vertex_file );
+	fread(fragment_src, sizeof(char), fragment_length, fragment_file );
+	
+	vertex_src[vertex_length+1] = '\0';
+	fragment_src[fragment_length+1] = '\0';
+//	printf("%s", vertex_src);
+//	printf("%s", fragment_src);
+
+	const char* vertexSrc = vertex_src;
+	const char* fragmentSrc = fragment_src;
+	
+	unsigned int shaderProgram;
+	shaderProgram = compileShaderProgram(&vertexSrc, &fragmentSrc);
+	free(fragment_src);
+	free(vertex_src);
+
+	return shaderProgram;
+}

src/Renderer.h

@@ -0,0 +1,20 @@
+#ifndef OPENGLINITIALIZATION
+#define OPENGLINITIALIZATION
+
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <string.h>
+
+GLFWwindow* initOpenGL();
+
+void WindowGotResized(GLFWwindow* window, int width, int height);
+
+unsigned int compileShaderProgram(const char** vertexSrc, const char** fragmentSrc);
+
+unsigned int loadCompileShader(char* vertexPath, char* fragmentPath);
+
+#endif

src/main.c

@@ -0,0 +1,85 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <stdbool.h>
+
+#include "Renderer.h"
+#include "Input.h"
+
+
+int main() {
+	GLFWwindow* window;
+	window = initOpenGL();
+
+	glfwSetKeyCallback(window, &key_pressed);
+
+	float vertices[] = {
+		-0.3f, -0.5f, 0.0f, 1.0f, 0.0f, 0.0f,
+	 	 0.8f, -0.5f, 0.0f, 0.0f, 1.0f, 0.0f,
+		 0.3f,  0.5f, 0.0f, 0.0f, 0.0f, 1.0f
+	};
+	float vertices2[] = {
+		-0.8f, -0.5f, 0.0f,
+		-0.3f, -0.5f, 0.0f,
+		-0.5f,  0.5f, 0.0f
+	};
+
+	char* vertex1 = "../shaders/vertex1.glsl\0";
+	char* fragment1 = "../shaders/fragment1.glsl\0";
+	char* vertex2 = "../shaders/vertex2.glsl\0";
+	char* fragment2 = "../shaders/fragment2.glsl\0";
+
+	unsigned int shader1, shader2;
+	printf("Compiling shader1\n");
+	shader1 = loadCompileShader(vertex1, fragment1);
+	printf("Compiling shader2\n");
+	shader2 = loadCompileShader(vertex2, fragment2);
+
+	unsigned int VAOs[2], VBOs[2];
+	glGenVertexArrays(2, VAOs);
+	glGenBuffers(2, VBOs);
+	//unsigned int EBO;
+	//glGenBuffers(1, &EBO);
+
+	glBindVertexArray(VAOs[0]);
+
+	glBindBuffer(GL_ARRAY_BUFFER, VBOs[0]);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)0 );
+	glEnableVertexAttribArray(0);
+	glVertexAttribPointer(1, 3,GL_FLOAT, GL_FALSE, 6 * sizeof(float), (void*)(3*sizeof(float)));
+	glEnableVertexAttribArray(1);
+	
+	glBindVertexArray(VAOs[1]);
+	glBindBuffer(GL_ARRAY_BUFFER, VBOs[1]);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices2), vertices2, GL_STATIC_DRAW);
+	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0 );
+	glEnableVertexAttribArray(0);
+
+	while(!glfwWindowShouldClose(window)) {
+
+		glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+		glClear(GL_COLOR_BUFFER_BIT);
+
+		glUseProgram(shader1);
+		glBindVertexArray(VAOs[0]);
+		glDrawArrays(GL_TRIANGLES, 0, 3);
+		
+		float time = glfwGetTime();
+		float green = (sin(time) / 2.0f) + 0.5f;
+
+		int vertexColorLocation = glGetUniformLocation(shader2, "Color");
+		glUseProgram(shader2);
+		glUniform4f(vertexColorLocation, 0.0f, green, 0.0f, 1.0f);
+
+		glBindVertexArray(VAOs[1]);
+		glDrawArrays(GL_TRIANGLES, 0, 3);
+		
+
+		glfwSwapBuffers(window);
+		glfwPollEvents();
+	}
+	
+	glfwTerminate();
+	return 0;
+}