opengl-bootstrap.cpp

// Include standard headers
#include <stdio.h>
#include <stdlib.h>

// Include GLEW
#ifdef __APPLE_CC__
#include <OpenGL/gl3.h>
#define GLFW_INCLUDE_GLCOREARB
#else 
#include <GL/glew.h>
#endif

#define GLFW_INCLUDE_GL3
#define GLFW_NO_GLU
// Include GLFW
#include <GLFW/glfw3.h>

// Include GLM
#include <glm/glm.hpp>
#include <iostream>

#include <common/Init.h>
#include <common/Shader.h>

using namespace glm;

int main( void )
{
  
  //Create init object
  Init init = Init();

  //Initialize glfw
  init.glfw(4,1);

  //Open a window
  GLFWwindow* window = init.window();

  //Print window info
  init.printWindowInfo(window);

  //Make opened window current context
  glfwMakeContextCurrent(window);

  
  init.glew();

  // Dark blue background
  glClearColor(0.0f, 0.0f, 0.4f, 0.0f);

  //Load in shaders
  static ShaderProgram prog("../vertShader.vert", "../fragShader.frag");

  GLuint VertexArrayID;
  glGenVertexArrays(1, &VertexArrayID);
  glBindVertexArray(VertexArrayID);

  static const GLfloat g_vertex_buffer_data[] = { 
    -1.0f, -1.0f, 0.0f,
    1.0f, -1.0f, 0.0f,
    0.0f,  1.0f, 0.0f,
  };

  GLuint vertexbuffer;
  glGenBuffers(1, &vertexbuffer);
  glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
  glBufferData(GL_ARRAY_BUFFER, sizeof(g_vertex_buffer_data), g_vertex_buffer_data, GL_STATIC_DRAW);

      
  do{


    int width, height;
    glfwGetFramebufferSize(window, &width, &height);
    glViewport(0, 0, width, height);
    glClear(GL_COLOR_BUFFER_BIT);
    prog();

    glEnableVertexAttribArray(0);
    glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);
    glVertexAttribPointer(
                          0,                  // attribute 0. No particular reason for 0, but must match the layout in the shader.
                          3,                  // size
                          GL_FLOAT,           // type
                          GL_FALSE,           // normalized?
                          0,                  // stride
                          (void*)0            // array buffer offset
                          );

    // Draw the triangle !
    glDrawArrays(GL_TRIANGLES, 0, 3); // 3 indices starting at 0 -> 1 triangle

    glDisableVertexAttribArray(0);


    glfwSwapBuffers(window);
    glfwPollEvents();
  } // Check if the ESC key was pressed or the window was closed
  while( !glfwWindowShouldClose(window) );

  // Close OpenGL window and terminate GLFW
  glfwDestroyWindow(window);
  glfwTerminate();
  glDeleteBuffers(1, &vertexbuffer);
  glDeleteVertexArrays(1, &VertexArrayID);
  exit(EXIT_SUCCESS);
}