IsosurfaceLat2 normals

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#71

From: Tim Scheitlin
Date: Thu, 10 Sep 1992 22:04

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Hi Folks,

I have a question about the Explorer IsosufaceLat2 module.
Some of the polygons in the isosurfaces I am generating with this module 
appear to have their normals pointing in the wrong direction.

This is evidenced by the fact that some of the polygons appear black
while the other polygons in the isosurface are colored correctly.
Flipping the normal produces just the opposite effect.

The man page for this module says that a "KNOWN PROBLEM" is that the
module can produce surfaces with holes because of a bug in the original
Marching Cubes algorithm.

My question is:  Is the problem I am having with incorrect normals 
related to the bug in the original Marching Cubes algorithm?
Is there a fix?

Thanks for any pointers.

Tim Scheitlin
scheitln@ncar.ucar.edu

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From: scheitln@ncar.ucar.edu (Tim Scheitlin)
Newsgroups: comp.graphics.explorer
Subject: IsosurfaceLat2 normals
Message-ID: <1992Sep10.220413.11698@ncar.ucar.edu>
Date: 10 Sep 92 22:04:13 GMT
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Reply-To: scheitln@ncar.ucar.edu (Tim Scheitlin)
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Organization: Nat'l Center for Atmospheric Research (NCAR); Boulder, CO
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