OpenGL安装教程

OpenGL安装教程

#include  
     #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GLFW glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);//配置GLFW glfwWindowHint(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; } //data int isSuccess; char infoLog[512]; //vertexShader data unsigned 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 Data unsigned 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 Pragram unsigned 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 data unsigned 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; }