OpenGL GLFW库画图流程

计算机图形学 OpenGL-Tutorial OpenGL教程

参考地址

http://www.opengl-tutorial.org/ OpenGL-tutorial
有中文版的但是中文版的代码部分有些注释有遗漏

代码流程

头文件

#include <stdio.h>
#include <stdlib.h>
// Include GLEW
#include <GL/glew.h>
// Include GLFW
#include <glfw3.h>
GLFWwindow* window;
// Include GLM
#include <glm/glm.hpp>
//matrix calculate header
#include <glm/gtc/matrix_transform.hpp>
using namespace glm;
//loading GLSL files
#include <common/shader.hpp>

main函数

int main( void )
{
    // Initialise GLFW
    if( !glfwInit() )
    {
        fprintf( stderr, "Failed to initialize GLFW\n" );
        getchar();
        return -1;
    }
    glfwWindowHint(GLFW_SAMPLES, 4);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // To make MacOS happy; should not be needed
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
    // Open a window and create its OpenGL context
    window = glfwCreateWindow( 1024, 768, "Tutorial 01", NULL, NULL);
    if( window == NULL ){
        fprintf( stderr, "Failed to open GLFW window. If you have an Intel GPU, they are not 3.3 compatible. Try the 2.1 version of the tutorials.\n" );
        getchar();
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    // Initialize GLEW
    if (glewInit() != GLEW_OK) {
        fprintf(stderr, "Failed to initialize GLEW\n");
        getchar();
        glfwTerminate();
        return -1;
    }
    // Ensure we can capture the escape key being pressed below
    glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
    // Dark blue background
    glClearColor(0.0f, 0.0f, 0.4f, 0.0f);
    do{
        // Clear the screen. It's not mentioned before Tutorial 02, but it can cause flickering, so it's there nonetheless.
        glClear( GL_COLOR_BUFFER_BIT );
        // Draw nothing, see you in tutorial 2 !
        // Swap buffers
        glfwSwapBuffers(window);
        glfwPollEvents();
    } // Check if the ESC key was pressed or the window was closed
    while( glfwGetKey(window, GLFW_KEY_ESCAPE ) != GLFW_PRESS &&
           glfwWindowShouldClose(window) == 0 );
    // Close OpenGL window and terminate GLFW
    glfwTerminate();
    return 0;
}