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MathGroup Archive 2000

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Re: Mathematica bug in Graphics3D ??

  • To: mathgroup at smc.vnet.net
  • Subject: [mg22248] Re: [mg22213] Mathematica bug in Graphics3D ??
  • From: "Dr. Christopher Purcell" <purcell at drea.dnd.ca>
  • Date: Sat, 19 Feb 2000 01:33:50 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

This feature has been bugging me and many others no doubt for many years
and finally someone has done something about it instead of just whining
(like me). If you download the package by Martin Kraus referred to below
and recently posted on Wolfram's site your polygon will be plotted ok.

<< PolygonTriangulation`SimplePolygonTriangulation`

Show[TriangulateSimplePolygons3D[
    Graphics3D[Polygon[{{2.5, Sqrt[3]/2, 0}, {3.5, Sqrt[3]/2, 0},
{4, Sqrt[3], 0}, {3, 2*Sqrt[3], 0}, {2, 2*Sqrt[3], 0},
{3, Sqrt[3], 0}} ]], Axes -> True]]


>Hello,
>
>I'm using Mathematica 4.0.1.0 under NT4 and when I try:
>
>Show[Graphics3D[Polygon[{{2.5, Sqrt[3]/2, 0}, {3.5, Sqrt[3]/2, 0},
>{4, Sqrt[3], 0}, {3, 2*Sqrt[3], 0}, {2, 2*Sqrt[3], 0},
>{3, Sqrt[3], 0}} ]], Axes -> True]
>
>Mathematica draws a polygon with only 5 corners where the last point
>{3,Sqrt[3],0} is missing. Am I doing something wrong here or what is
>going on ?
>
>Many thanks
>
>		Axel
>
>--
>-----------------------------------------------------------------
>Dr. A. Kowald
>Innovationskolleg Theoretische Biologie
>Humboldt University Berlin
>Invalidenstr. 43
>10115 Berlin
>Germany
>
>Email: a.kowald at itb.biologie.hu-berlin.de
>Phone: +49 30 2093 9105
>Fax:   +49 30 2093 8801
>-----------------------------------------------------------------

Dr. Christopher J. Purcell
DREA, 9 Grove St. Dartmouth NS B2Y3Z7



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