OpenGL学习 环境搭建Clion+glfw+glad+mingw

前言

opengl学习中 glfw+glad 是目前比较多的组合
如果你需要 glew+freeglut 也可以看看我另一篇openGL环境搭建
本质上异曲同工
Clion+glew+freeglut+mingw搭建

1. 下载库

glad

可以自己下载库也可以使用在线配置
这里是在线配置
glad在线配置
选择以下配置选项
要保证 opengl的Api版本在3.3以上才会兼容
模式选择core
拓展可以不选

然后generate 会得到一个zip文件下载后解压得到include 和src

glfw下载

glfw
可以自己Cmake编译
也可以下载预编译版本
我们下载预编译版本

2. 配置

1.可以把glad的include文件夹下的内容复制到glfw的include文件夹中

这样可以一起include

2.也可以重新衔接一个include文件夹

在项目中添加glad.c 文件 路径随意

cmake_minimum_required(VERSION 3.15)
project(C__test)

set(CMAKE_CXX_STANDARD 14)
link_directories("D:/computerGraph/glfw/lib-mingw-w64")
#1. glad的include和glfw的include文件夹合并了
include_directories("D:/computerGraph/glfw/include")
#2.glad的include文件夹另外设置 inlcude_directories("D:/computerGraph/glad/include")
# 添加 glad.c为可执行
add_executable(C__test main.cpp src/glad.c)
# 衔接库
target_link_libraries(C__test libglfw3.a)

3. 测试

learnopenGL源码地址

# 源码来源https://learnopengl.com/ 
#include <glad/glad.h>
#include <GLFW/glfw3.h>

#include <iostream>

void framebuffer_size_callback(GLFWwindow* window, int width, int height);
void processInput(GLFWwindow *window);

// settings
const unsigned int SCR_WIDTH = 800;
const unsigned int SCR_HEIGHT = 600;

int main()
{
    // glfw: initialize and configure
    // ------------------------------
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    // glfw window creation
    // --------------------
    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
    if (window == NULL)
    {
        std::cout << "Failed to create GLFW window" << std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);

    // glad: load all OpenGL function pointers
    // ---------------------------------------
    if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
    {
        std::cout << "Failed to initialize GLAD" << std::endl;
        return -1;
    }    

    // render loop
    // -----------
    while (!glfwWindowShouldClose(window))
    {
        // input
        // -----
        processInput(window);

        // render
        // ------
        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
        // -------------------------------------------------------------------------------
        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    // glfw: terminate, clearing all previously allocated GLFW resources.
    // ------------------------------------------------------------------
    glfwTerminate();
    return 0;
}

// process all input: query GLFW whether relevant keys are pressed/released this frame and react accordingly
// ---------------------------------------------------------------------------------------------------------
void processInput(GLFWwindow *window)
{
    if(glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
        glfwSetWindowShouldClose(window, true);
}

// glfw: whenever the window size changed (by OS or user resize) this callback function executes
// ---------------------------------------------------------------------------------------------
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
    // make sure the viewport matches the new window dimensions; note that width and 
    // height will be significantly larger than specified on retina displays.
    glViewport(0, 0, width, height);
}

4.测试图

略

参考资料 LearnOpenGL.com