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I have been reading this paper http://openaccess.thecvf.com/content_iccv_workshops_2013/W21/papers/Sugiura_3D_Surface_Extraction_2013_ICCV_paper.pdf

I have already generated a tetrahedra for my mesh and I would like to create a surface mesh. I can't understand the algorithm. From my understanding, there is a camera that generates rays towards to the points of the tetrahedral, and I get the intersections, but how would I eliminate the triangles that are inside or outside ? how would I detect inside or outside polygons ?

Would someone give a pseudo code of the algorithm ?

andre
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  • Lookup "triangle winding order" – Richard Critten Jan 13 '18 at 13:08
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    Why downvoting ?! – andre Jan 13 '18 at 13:39
  • @RichardCritten Can you elaborate more ? What's triangle winding order related to simplifying the mesh construction ? – andre Jan 13 '18 at 13:41
  • When your ray intersects a triangle the winding order of the edges that make up the triangle determine whether the triangle is a front or back face. This is basic 3D geometry maybe you should do some background reading. – Richard Critten Jan 13 '18 at 13:57
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    @RichardCritten and when its front or back face, how to extract a surface from that mesh based on the winding order ? should I ignore back faces ? cull them ? – andre Jan 13 '18 at 15:38

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