我的電腦是windows，在電腦上學(xué)習(xí)Opengl，推薦開發(fā)工具 Clion
推薦一個(gè)很好的opengl學(xué)習(xí)網(wǎng)站 https://learnopengl-cn.readthedocs.io/zh/latest/01%20Getting%20started/03%20Hello%20Window/

話不多說(shuō)摄咆，先創(chuàng)建一個(gè)Hello word 工程

1.先下載幾個(gè)庫(kù)

需要的三方庫(kù).png

1. freeglut 這個(gè)庫(kù)最初由MarkKilgard編寫，從OpenGL Redbook（紅寶書）第二版起就用來(lái)作為示例程序的支持環(huán)境 GLUT因?yàn)槠浜?jiǎn)單晌缘、可用性廣长捧、可移植性強(qiáng)，被廣泛應(yīng)用于各種OpenGL實(shí)際應(yīng)用中
   https://www.transmissionzero.co.uk/software/freeglut-devel/
2. glad 也是用來(lái)訪問(wèn)OpenGL規(guī)范接口的第三方庫(kù)
   https://glad.dav1d.de/
3. glfw 是一個(gè)專門針對(duì)OpenGL的C語(yǔ)言庫(kù)放祟，它提供了一些渲染物體所需的最低限度的接口鳍怨。它允許用戶創(chuàng)建OpenGL上下文，定義窗口參數(shù)以及處理用戶輸入
   http://www.glfw.org/download.html
4. glew (OpenGL Extension Wrangler Library) 也是opengl額外的庫(kù)跪妥，這個(gè)庫(kù)封裝了opengl復(fù)雜的操作京景，簡(jiǎn)化的我們opengl的API調(diào)用
   http://glew.sourceforge.net/

2.Clion 創(chuàng)建工程

工程.png

1. 本工程采用glad glew glfw 三個(gè)庫(kù)
2. 分別創(chuàng)建inclue lib src三個(gè)目錄
3. inclue主要是頭文件，lib主要是需要鏈接的庫(kù)
4. src下面就一個(gè)glad源文件

3.CMakeLists.txt

cmake_minimum_required(VERSION 3.15)
project(OpenglTest2)
# 指定支持的c++版本
set(CMAKE_CXX_STANDARD 14)
# 指定編譯后的輸出目錄
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY bin)
# 指定include 和 鏈接lib
include_directories(include)
link_directories(lib)
add_executable(OpenglTest2 main.cpp src/glad.c)
# 把glfw 和 glew鏈接進(jìn)來(lái)
target_link_libraries(OpenglTest2 libglfw3.a glew32s.lib)

4.測(cè)試文件

#include <iostream>

#include "glad/glad.h"
#include "GLFW/glfw3.h"
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);

#ifdef __APPLE__
    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // uncomment this statement to fix compilation on OS X
#endif

    // 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);
}

5.運(yùn)行結(jié)果如下

程序.png

1.有用VS開發(fā)的配置工程會(huì)更簡(jiǎn)單一些,不過(guò)安裝VS要電腦要牛逼點(diǎn)
2.Clion 開發(fā)工具學(xué)習(xí)OpenGL足夠了

欲乘東風(fēng)骗奖，先把工具環(huán)境齊全了确徙，有疑問(wèn)請(qǐng) @我 liugstick@163.com !!!