info on GeomView

[munzner]

Actually, degenerate OFF objects are now handled more gracefully so
the CNOFF object might do what you want. A one-vertex face is
considered legitimate, so the normal is drawn when requested. Make
sure that smooth shading is on so the per-vertex normal you supply is
drawn, not the possibly bogus per-face normal computed by geomview.
When the linewidth is greater than 1, fatpoints are drawn (i.e. a disc
which always faces the camera, whose radius is determined by the
linewidth setting). Thus you can actually see the color of the point,
which is very difficult when it's drawn as a single pixel.

Note that these improvements are only in the new version, which will
be out shortly. The old version does not draw normals or use fatpoints
for one-vertex faces.

So, a file like the one below will do the right thing in the new
version. Note that you can also set the appearance though the geomview
Appearance panel or with a "merge-baseap" command in your .geomview
file.

Tamara Munzner
------------------------------------------------------------------------
{appearance {
 shading smooth
 +face
 +normal
 normscale .2
 -evert
 linewidth 5
 material {normalcolor .5 0 1}
 }

CNOFF
1 1 1

0 0 0	0 0 1  	0 1 .5 1

1 	0	
}