C++图形编程：面向初学者的高性能指南

#include <iostream>
#include <vector>

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

using namespace std;

const int SCREEN_WIDTH = 800;
const int SCREEN_HEIGHT = 600;

vector<float> vertices = {
    -0.5f, -0.5f, 0.0f,
     0.5f, -0.5f, 0.0f,
     0.0f,  0.5f, 0.0f
};

GLuint VAO, VBO;

int main() {
    // 初始化 GLFW
    if (!glfwInit()) {
        cout << "GLFW 初始化失败" << endl;
        return -1;
    }

    // 创建窗口
    GLFWwindow* window = glfwCreateWindow(SCREEN_WIDTH, SCREEN_HEIGHT, "OpenGL 三角形", NULL, NULL);
    if (!window) {
        cout << "创建窗口失败" << endl;
        return -1;
    }

    // 初始化 GLAD
    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
        cout << "GLAD 加载失败" << endl;
        return -1;
    }

    // 创建顶点数组对象和顶点缓冲对象
    glGenVertexArrays(1, &VAO);
    glGenBuffers(1, &VBO);

    // 绑定 VAO
    glBindVertexArray(VAO);

    // 绑定 VBO 并上传顶点数据
    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(float), &vertices[0], GL_STATIC_DRAW);

    // 指定顶点属性（位置）
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
    glEnableVertexAttribArray(0);

    // 渲染循环
    while (!glfwWindowShouldClose(window)) {
        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        // 绘制三角形
        glDrawArrays(GL_TRIANGLES, 0, 3);

        // 交换缓冲并检查事件
        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    // 释放资源
    glDeleteVertexArrays(1, &VAO);
    glDeleteBuffers(1, &VBO);

    glfwDestroyWindow(window);
    glfwTerminate();

    return 0;
}