Date: Apr 11, 2013 11:03 PM
Author: Toan Cao
Subject: Compute a normal vector on a mesh

Hi everyone,
I have a mesh in 3D space (consists of 3D vertices and facets). Normal vector at each vertex and normal vector of each facet are available.
If i would like to compute normal vector of a point X on mesh (X is not one of any vertices of mesh). Do you have any solution ?
I read some documents which recommend to use barycentric coordinate to interpolate normal vector of X if we know a triangle (facet) which X is inside. If so, computation is so much when we have to check every facet for X !?

Thanks in advance for your solution !
Toan