OpenGL loader

src/main.cpp

@@ -1,5 +1,8 @@
 #include <iostream>
 #include "RaycasterConfig.h"
+#define GLAD_GL_IMPLEMENTATION
+#include <glad/glad.h>
+#define GLFW_INCLUDE_NONE
 #include <GLFW/glfw3.h>
 
 int main(int argc, char *argv[]){
@@ -14,7 +17,80 @@ int main(int argc, char *argv[]){
         return -1;
     }
     glfwMakeContextCurrent(window);
+    gladLoadGL();
     while(!glfwWindowShouldClose(window)){
+        float vertices[] = {
+            -0.5f, -0.5f, 0.0f,
+            0.5f, -0.5f, 0.0f,
+            0.0f,  0.5f, 0.0f
+        };  
+        unsigned int VBO;
+        glGenBuffers(1, &VBO);
+        glBindBuffer(GL_ARRAY_BUFFER, VBO);
+        glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
+
+        const char *vertexShaderSource = "#version 330 core\n"
+        "layout (location = 0) in vec3 aPos;\n"
+        "void main()\n"
+        "{\n"
+        "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+        "}\0";
+        unsigned int vertexShader;
+        vertexShader = glCreateShader(GL_VERTEX_SHADER);
+        glShaderSource(vertexShader, 1, &vertexShaderSource, NULL);
+        glCompileShader(vertexShader);
+        int  success;
+        char infoLog[512];
+        glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
+
+        if(!success)
+        {
+            glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
+            std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n" << infoLog << std::endl;
+        }
+
+
+        const char *fragmentShaderSource = "#version 330 core\n"
+        "out vec4 FragColor;\n"
+        "void main()\n"
+        "{\n"
+        "    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+        "} \0";
+
+        unsigned int fragmentShader;
+        fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+        glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
+        glCompileShader(fragmentShader);
+        glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success);
+
+        if(!success)
+        {
+            glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);
+            std::cout << "ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n" << infoLog << std::endl;
+        }
+
+        unsigned int shaderProgram;
+        shaderProgram = glCreateProgram();
+
+        glAttachShader(shaderProgram, vertexShader);
+        glAttachShader(shaderProgram, fragmentShader);
+        glLinkProgram(shaderProgram);
+        glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
+        if(!success) {
+            glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
+            std::cout << "ERROR::SHADER::PROGRAM::LINK_FAILED\n" << infoLog << std::endl;
+        }
+        glUseProgram(shaderProgram);
+        glDeleteShader(vertexShader);
+        glDeleteShader(fragmentShader);
+        glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+        glEnableVertexAttribArray(0);
+
+        unsigned int VAO;
+        glGenVertexArrays(1, &VAO);
+        glBindVertexArray(VAO);
+        glDrawArrays(GL_TRIANGLES, 0, 3);
+
         glfwPollEvents();
         glfwSwapBuffers(window);
     }