the near and far plane

[keith]

I know that too large an f will probably slow down rendering without
major occluders and occlusion testing. But how to set n? It can't be
zero, so based on what criteria/formulas do I set it?

[Wolfgang Draxinger]

keith wrote:

> I know that too large an f will probably slow down rendering without
> major occluders and occlusion testing.

The value of f has no impact on a rasterizer performance, if addidional
objects pop up not visible before then it's just additional data to process.

> But how to set n? It can't be zero, so based on what criteria/formulas do
> I set it?

Setting a too large f and too large n will cause you problems with depth
resolution. The most simple and also best rule for setting near and far
plane is, that they should be as close as possible to the visibile objects
volume's boundaries.

Wolfgang