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Re: [cgal-discuss] Efficient algorithm for calculating a four sided polygon to replace two mesh triangles


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  • From: Guillaume Damiand <>
  • To:
  • Subject: Re: [cgal-discuss] Efficient algorithm for calculating a four sided polygon to replace two mesh triangles
  • Date: Wed, 20 Nov 2013 10:08:51 +0100

Le 20/11/2013 09:41, KeithSloan52 a écrit :
Well I will try.

If I have a mesh any time I have two triangles that share the same edge and
are in the same plane or close to, I would like to remove the shared edge so
that I am left with a poylgon. ABCD in diagram
<http://cgal-discuss.949826.n4.nabble.com/file/n4658438/diag.png>

The principle of the algorithm:

Iterate through all the edges of the mesh, test if the two triangles incident to the edge are in the same plane or close to, and when it is the case call the join_facet method

cf http://doc.cgal.org/latest/Polyhedron/classCGAL_1_1Polyhedron__3.html#a4f3e7c4e0800462026443a7ad0ca6db8

to merge the two triangles around a given edge.



Guillaume





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