OpenGL笔记之 框架搭建

视频：https://b23.tv/2Sl0JG

GLWindow.hpp

#include <glad/glad.h> // glad.h必须放在最前面
#include <GLFW/glfw3.h>

#include <iostream>

void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
    glViewport(0, 0, width, height);
}

class GLWindow
{
public:
    GLWindow(int w,int h,const char* title) {
        glfwInit(); // 初始化GLFW
        glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
        glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
        glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

#ifdef __APPLE__
        glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
#endif

        this->window = glfwCreateWindow(w,h, title, NULL, NULL); // 创建一个窗口
        if (this->window == NULL)
        {
            std::cout << "Failed to create GLFW window" << std::endl;
            glfwTerminate(); // 销毁
            exit(1);
        }
        glfwMakeContextCurrent(this->window);
        glfwSetFramebufferSizeCallback(this->window, framebuffer_size_callback);

        if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
            std::cout << "Failed to initialize GLAD" << std::endl;
            exit(1);
        }
    }

    GLFWwindow *window;

    ~GLWindow() {
        glfwTerminate();
    }

    void run() {
        while(!glfwWindowShouldClose(this->window)) {
            processInput(this->window);
            this->paintGL();

            glfwSwapBuffers(this->window);
            glfwPollEvents();
        }
    }
private:
    void paintGL() {
        glClearColor(0.2f,0.3f,0.3f,0.1f);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    }
    void processInput(GLFWwindow *window)
    {
        if(glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
            glfwSetWindowShouldClose(window, true);
    }
};

main.cpp

#include "./GLWindow.hpp"

int main() {
    GLWindow window(400,300,"OpenGL");

    window.run();
    return 0;
}

Makefile

Windows

path=./bin
projectName=OpenGL框架

main:main.cpp
	g++ main.cpp $(path)/glfw3.dll glad.c -o $(path)/$(projectName) -lopengl32

Linux

path=./bin
projectName=OpenGL框架

main:main.cpp
	g++ main.cpp glad.c -o $(path)/$(projectName) -lGLEW -lglfw3 -lGL -lX11 -lpthread -lXrandr -lXi -ldl