矩阵使用裁剪平面从3D环境投影到屏幕.因此，x和y裁剪平面需要考虑窗口的宽高比以及FOV.所以你应该有这样的东西:

The clipping planes are used by the matrix to project from the 3D environment to your screen. So the x and y clipping planes need to account for the aspect ratio of your window, and the FOV. So you should have something like this:

...
double fovyInDegrees = 50; // Change this if you want.
double ymax, xmax, aspectRatio;
aspectRatio = OpenGL.WIDTH / OpenGL.HEIGHT;
ymax = znear * Math.tan(fovyInDegrees * Math.PI / 360);
xmax = ymax * aspectRatio;
GL11.glFrustum(-xmax, xmax, -ymax, ymax, znear, zfar);
...

请注意，我刚刚将某些c ++代码更改为Java，因此未经测试.它可以在我的代码中工作，所以应该没问题.

Note that I've just changed some of my c++ code to Java, so this isn't tested. It works in my code though, so should be fine.