Visual studio 2019 OpenGL setup on windows 10

OpenGL有很多library，在建置环境之前，我们需要了解要下载什麽东西

这边我们选择了GLFW + GLAD来建置我们的OpenGL

GLFW 是一个跨平台的OpenGL应用框架，支持窗口创建、读取输入和处理事件等功能。特点：轻量级、开源和跨平台。取代glut 或 freeglut。

GLAD是OpenGL C++的extension library，支援更高级的OpenGL函式。GLAD 可以说是 GLEW的升级版。

可以想成我们安装了一个GLFW提供了GL的基本函数，而GLAD提供了更进阶的GL高级函数。
关於更多的说明可以参考最下面连结[1][2]

实际安装

下载并安装visaul studio 2019
Building GLFW
Download GLFW source package https://www.glfw.org/download.html

Download Cmake https://cmake.org/download/

下载後安装Cmake，开启Cmake GUI
tool->configure

source选择好刚刚下载的glfw folder，build的资料夹若没有就自己创建一个。点击configure

点击Generate

点击Open Project，会自动用VS2019开启刚刚build好的专案，点选建置方案
我们这边编译Debug, x64设定

编译後的lib会在src/debug里面

保存所有编译好的library
先创建资料夹如下，路径可自行选择

include 放GLFW里面的include资料

lib里面放刚刚的glfw3.lib

开启新的空白专案

设定include与lib路径

新增连结器->输入->其他相依性
if you’re on Windows the OpenGL library opengl32.lib comes with the Microsoft SDK, which is installed by default when you install Visual Studio

配置GLAD
https://glad.dav1d.de/
language C/C++
Profile Core
gl version 3.3 or higher

下载glad.zip

将include资料复制到刚刚创建的include目录下

glad.c则加入到你的专案里

Source.cpp加入以下范例程序

#include <glad/glad.h>
#include <glfw3.h>
#include <iostream>
// 设置窗口尺寸
const unsigned int SCR_WIDTH = 400;
const unsigned int SCR_HEIGHT = 300;
#include <glad/glad.h>
#include <glfw3.h>
#include <iostream>
// 设置窗口尺寸
const unsigned int SCR_WIDTH = 400;
const unsigned int SCR_HEIGHT = 300;
int main()
{
    // glfw: 初始化
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
#ifdef __APPLE__
    // uncomment this statement to fix compilation on OS X
    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
#endif
    // glfw 创建窗口
    GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "Test<GLFW+GLAD>", NULL, NULL);
    if (window == NULL)
    {
        std::cout << "Failed to create GLFW window" << std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    // 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))
    {
        glClearColor(0.0f, 1.f, 0.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);
        // glfw: swap buffers and poll IO events (keyspressed/released, mouse moved etc.)
        glfwSwapBuffers(window);
        glfwPollEvents();
    }
    // glfw: terminate, clearing all previously allocated GLFWresources.
    glfwTerminate();
    return 0;
}