Re: pfCylIsectSphere
Jim Helman (jimh++at++surreal)
Mon, 23 Jan 95 14:27:07 -0800
The intersection routines are mainly set up to provide quick
rejection tests for things like culling, hence the possible
return value of PFIS_MAYBE when the result might be too time
consuming to compute exactly. A common case where this occurs
is in tests against a frustum or polytope in which it can take
many planes in combination to perfectly reject even a convex
object. Similarly, PFIS_ALL_IN can be expensive to compute in
some cases. One could argue that we should have multiple sets
of intersection routines, one for quick reject, one for exact
reject, one for exact containment, etc. But for now, we only
have one.
However, having given that excuse, I'll admit that in this case
pfCylIsectSphere really should have answer with more certainty.
It will give a more accurate result in 2.0.
rgds,
-jim helman
jimh++at++surreal.asd.sgi.com
415/390-1151
This archive was generated by hypermail 2.0b2
on Mon Aug 10 1998 - 17:50:53 PDT