This is just a correction for my last message on N-Patches. I just realised
that the normal interpolation formula I gave was wrong. I used the formula
NewNormal=Cos(45)*Normal0+Sin(45)*Normal1. This only works when the normals
are perpendicular to each other (as in the case of my first test mesh).
I'll have to look at spherical interpolation for normals more closely, I
have the feeling that I can take the cross-product of the two normals, use
that as the axis of rotation to rotate around. I'm sure there are simpler
approximations out there as well. Linearly interpolating between the two
normals, eg NewNormal=0.5*Normal0+0.5*Normal1, and then renormalising to get
back to unit length sounds good too.
Peter Warden
________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com
|
