应该是画一个很大的平面??怎么画了,我用的gl_quas,屏幕什么也没有啊
void init (void)
{
glClearColor(0.0,0.0,0.0,0.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0,1.0,0.0,1.0, -10.0,10.0);
// 最后的两个参数限定了你的可视距离从-10 到 10, 原来的-1到1太小了
gluLookAt(0.0, 5.0,0.0, 0.0,0.0,0.0, 1.0,0.0,0.0);
// 相机的位置要确定,否则投影不出来的
}