如何使用 glfw 将 opengl window 居中?

How to center an opengl window with glfw?

我想在屏幕中央画一个opengl window,但是我到处搜索都没有找到任何答案。下面是创建 window 的常见代码片段,但它总是出现在最左上角 position.How 我可以控制它吗?

int main()
{
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR,3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR,3);
    glfwWindowHint(GLFW_OPENGL_PROFILE,GLFW_OPENGL_CORE_PROFILE);

    GLFWwindow* window = glfwCreateWindow(400,200,"LearnOpenGl",NULL,NULL);
    if(window == NULL)
    {
        cout<<"Failed to create GLFW window!!"<<endl;
        glfwTerminate();
        return -1;
    }

    glfwMakeContextCurrent(window);

    if(!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
    {
        cout<<"Failed to initialize GLAD!!"<<endl;
        return -1;
    }

    glViewport(400, 400, 100, 200);

    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);

    while(!glfwWindowShouldClose(window))
    {
        glfwSwapBuffers(window);
        glfwPollEvents();
    }

}

请使用这个函数“glfwSetWindowPos”。

这是一个example

@Himanshu 回答了一个关于如何获得 window aka window 大小 的最大宽度和最大高度的问题 因此,使用那段代码,您可以将其居中,如下所示:

int width=800;// could declare them as "const int" if you like
int hight=800;
GLFWwindow* window = glfwCreateWindow(width,hight, "OpenGL", NULL, NULL);
int max_width  = GetSystemMetrics(SM_CXSCREEN);
int max_hieght = GetSystemMetrics(SM_CYSCREEN);
glfwSetWindowMonitor(window, NULL, (max_width/2)-(width/2), (max_hieght/2) - (height/2), width, height, GLFW_DONT_CARE);