LearnOpenGL-窗口

#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <iostream>

using namespace std;
//窗口回調函數
void Framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
    glViewport(0, 0, width, height);
}
//輸入控制
void processInput(GLFWwindow* window)
{
    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
        glfwSetWindowShouldClose(window, true);
    }
}


int main()
{
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    GLFWwindow* window = glfwCreateWindow(1024, 768, "OpenGL", NULL, NULL);
    if (window == NULL) {
        cout << "Failed to create GLFW window" << endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window); //設置窗口上下文
    glfwSetFramebufferSizeCallback(window, Framebuffer_size_callback);//註冊回調函數

    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {//初始化GLAD
        cout << "Failed to initialize GLAD" << endl;
        return -1;
    } 
    while (!glfwWindowShouldClose(window)) {//循環渲染
        processInput(window); 
        glfwPollEvents();
        glfwSwapBuffers(window);

        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);//設置clear顏色
        glClear(GL_COLOR_BUFFER_BIT);//clear窗口
    } 
        
    glfwTerminate();
    return 0;
}