OpenGL的安装（GLFW+GLAD）

参考文章1
参考文章2

#include <iostream>
#include"glad/glad.h"//！！！注意这里，/前面的是h文件的上级目录，可能每个人安装不同，也有不同
#include"GLFW/glfw3.h"
using namespace std;static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS){glfwSetWindowShouldClose(window, GL_TRUE);}}//vertex shader
const GLchar* vertexShader_Code =
"#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"
"}";const GLchar* fragmentShader_Code =
"#version 330 core\n"
"out vec4 FragColor;\n"
"void main()\n"
"{\n"
"FragColor=vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
"}";int main()
{//三角顶点float vertices[] ={-0.5f,-0.5f,0.0f,//左下角0.5f,-0.5f,0.0f,//右下角0.0f, 0.5f,0.0f//顶端角};glfwInit();//初始化glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);//配置GLFWglfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);//配置GLFWglfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);//glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);GLFWwindow* window = glfwCreateWindow(800, 600, "OpenGL", nullptr, nullptr);glfwSetKeyCallback(window, key_callback);if (window == nullptr){cout << "Failed to create GLFW window" << endl;glfwTerminate();//terminate the glfw(end the glfw)return -1;}glfwMakeContextCurrent(window);//设置当前openGL上下if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)){cout << "Failed to initialize GLAD" << endl;return -1;}//dataint isSuccess;char infoLog[512];//vertexShader dataunsigned int vertexShader;vertexShader = glCreateShader(GL_VERTEX_SHADER);glShaderSource(vertexShader, 1, &vertexShader_Code, NULL);glCompileShader(vertexShader);/*编译是否通过*/glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &isSuccess);if (!isSuccess){glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);cout << "ERROR::VertexShader::Compile_failed" << infoLog << endl;}else{cout << "SUCCESS::VertexShader" << endl;}//fragmentShader Dataunsigned int fragmentShader;fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);glShaderSource(fragmentShader, 1, &fragmentShader_Code, NULL);glCompileShader(fragmentShader);/*编译是否通过*/glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &isSuccess);if (!isSuccess){glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog);cout << "ERROR::FragmentShader::Compile_failed" << infoLog << endl;}else{cout << "SUCCESS::FragmentShader" << endl;}//Shader Pragramunsigned int shaderProgram;shaderProgram = glCreateProgram();glAttachShader(shaderProgram, vertexShader);glAttachShader(shaderProgram, fragmentShader);glLinkProgram(shaderProgram);glGetProgramiv(shaderProgram, GL_LINK_STATUS, &isSuccess);if (!isSuccess){glGetShaderInfoLog(shaderProgram, 512, NULL, infoLog);cout << "ERROR::ShaderProgram::Link_failed" << infoLog << endl;}else{cout << "SUCCESS::ShaderProgram" << endl;glUseProgram(shaderProgram);glDeleteShader(vertexShader);glDeleteShader(fragmentShader);}//vectices dataunsigned int VAO;unsigned int VBO;glGenVertexArrays(1, &VAO);//获得一个顶点数组对象glBindVertexArray(VAO);glGenBuffers(1, &VBO);glBindBuffer(GL_ARRAY_BUFFER, VBO);glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);glEnableVertexAttribArray(0);glBindBuffer(GL_ARRAY_BUFFER, 0);glBindVertexArray(0);while (!glfwWindowShouldClose(window)){glfwPollEvents();//检查有没有触发事件glClearColor(0.27f, 0.27f, 0.27f, 1.0f);glClear(GL_COLOR_BUFFER_BIT);glUseProgram(shaderProgram);glBindVertexArray(VAO);glDrawArrays(GL_TRIANGLES, 0, 3);glfwSwapBuffers(window);//双缓冲（替换窗口的每一个像素值）}glfwTerminate();return 0;
}

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