Have you taken a look at barycentric coordinates yet ? there are tons of examples out there.
http://en.wikipedia.org/wiki/Barycentric_coordinates_(mathematics) hth, -d On Thu, Apr 2, 2009 at 10:31 AM, Thom Wickes <[email protected]> wrote: > > Ok, I need to find a way of distinguishing whether points sit inside > or outside a mesh - I have an idea how to do it with convex meshes, > but not with non-convex. > > so in this photo > > <img src ="http://farm4.static.flickr.com/ > 3278/3406312071_8ca8aa4df8_o.jpg<http://farm4.static.flickr.com/%0A3278/3406312071_8ca8aa4df8_o.jpg> > "> > > I want to select the locators that don't penetrate the mesh surface, > so all the ones outside and inside the cup, but not the ones under the > surface. > > I have a feeling this involves some ray casting style stuff and I had > a look at the MFnMesh class, but I don't really know any method of > doing this, let alone how to implament it. > > Any help/suggestions would be greatly appreciated. > > Thanks > > > > -- When things get too complicated, it sometimes makes sense to stop and wonder: Have I asked the right question? -Enrico Bombieri --~--~---------~--~----~------------~-------~--~----~ http://groups.google.com/group/python_inside_maya -~----------~----~----~----~------~----~------~--~---
