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Topic: Compute a normal vector on a mesh
Replies: 1   Last Post: Apr 12, 2013 1:22 AM

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Bruno Luong

Posts: 8,824
Registered: 7/26/08
Re: Compute a normal vector on a mesh
Posted: Apr 12, 2013 1:22 AM
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"Toan Cao" <toancv3010@gmail.com> wrote in message <kk7thb$nl5$1@newscl01ah.mathworks.com>...
> 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 !?


Hint: The cross-product of two edges provide a normal vector.

Bruno



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