3D convex hull
- To: mathgroup at smc.vnet.net
- Subject: [mg111738] 3D convex hull
- From: "S. B. Gray" <stevebg at ROADRUNNER.COM>
- Date: Thu, 12 Aug 2010 05:26:47 -0400 (EDT)
- Reply-to: stevebg at ROADRUNNER.COM
I think it was Yves Klett who told me about this:
verts = ComputationalGeometry`Methods`ConvexHull3D[plist][[1, 1]];
where plist is the original list of vertices and verts is the list of
vertices on the convex hull of plist. Very simple and very fast, but it
does not distinguish the triangles on the convex hull from the triangles
having interior lines. Eric's does do that (in fact it returns the hull
in terms of those exterior polygons or triangles), and it's not so easy
to do after doing the command listed above. Fortunately I can
accommodate the extra triangle lines.
Maybe version 8 will have a CH function that does everything.
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