在C ++中开始使用OpenGL

问题描述

我尝试使用开始使用OpenGl进行编程，并且以下代码到目前为止：

I have attempted to start programming with OpenGl using this tutorial, and have the following code so far:

#include <gl/glut.h> // Include the GLUT header file

void display (void)
{
}

int main(int argc, char **argv)
{
    glutInit(&argc, argv); // Initialize GLUT
    // Set up a basic display buffer (only single buffered for now)
    glutInitDisplayMode (GLUT_SINGLE);
    glutInitWindowSize (500, 500); // Set the width and height of the window
    glutInitWindowPosition (100, 100); // Set the position of the window
    // Set the title for the window
    glutCreateWindow("Your first OpenGL Window!");

    glutDisplayFunc(display);
    glutMainLoop();
    glClearColor(1.f, 0.f, 0.f, 1.f); // Clear the background of our window to red

    return 0;
}

我在Eclipse中构建和运行项目，发生（没有窗口弹出或任何东西）。任何人都可以告诉我我可能做错了什么？

I build and run the project in Eclipse, it compiles all fine, but nothing happens (no windows pop up or anything). Can anybody tell me what I could be doing wrong?

推荐答案

glutInitDisplayMode (GLUT_SINGLE);

您还需要定义所需的framebuffer格式，即添加 GLUT_RGBA ，至少（你可能还需要一个深度缓冲区）。并且只有少数情况下，一个不想要双缓冲区。所以： glutInitDisplayMode（GLUT_RGBA | GLUT_DEPTH | GLUT_DOUBLE）;

You also need to define the kind of framebuffer format you want, i.e. add a GLUT_RGBA, at least (and you probably also want a depth buffer). And there are only few cases where one not wants a double buffer. So: glutInitDisplayMode(GLUT_RGBA | GLUT_DEPTH | GLUT_DOUBLE);

然后你的显示功能不会被调用，除非你在 glutCreateWindow 后添加 glutDisplayFunc（display）; b

Then your display function will not be called, unless you add a glutDisplayFunc(display); after glutCreateWindow.

glutMainLoop();
glClearColor(1.f, 0.f, 0.f, 1.f);

glutMainLoop不返回。即使是这样，glClearColor在程序的那个地方没有效果。

glutMainLoop does not return. And even if it did, glClearColor had no effect at that place in the program.

这篇关于在C ++中开始使用OpenGL的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！