Re: Problem with 3D Polygon
- To: mathgroup at smc.vnet.net
- Subject: [mg33422] Re: Problem with 3D Polygon
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 21 Mar 2002 09:26:59 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <a79cit$7ug$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, Mathematica can't render non-convex polygons in 3d ! You can triangulate the polygon by hand if you have only one or you can use http://library.wolfram.com/packages/polygontriangulation/ Regards Jens "Kevin J. McCann" wrote: > > When I plot the following > > Graphics3D[{LightBlue, > Polygon[{{1,0,0},{1,0,1},{-1,0,1},{-1,0,0},{-1/2,0,0},{-1/2,0, > 1/2},{1/2,0,1/2},{1/2,0,0},{1,0,0}}]}],Lighting->False, > Boxed->False]; > > I get just a blue rectangle with some of the boundary drawn, not an inverted > "U" shape. Can someone explain this please. > > Kevin