Re: [geomview-users] strange display

[Mark P. <mb...@ge...>]

> Hi, I'm trying to generate OFF files in my program but what is displayed
> in geomview is not what I expect.  It seems to add some faces which

I believe Geomview doesn't correctly handle concave polygons unless
you tell it to, by clicking on the "Concave" box in the
Inspect->Appearance panel.  (The reason is that they're more expensive
--- in order be drawn correctly, concave polygons must be detected and
broken into convex ones, a process that takes time, so Geomview
doesn't bother checking whether a polygon is concave unless you turn
the "Concave" setting on.)

You can also turn on "Concave" by putting

   (merge-ap "worldgeom" appearance { * concave } )

into your ~/.geomview file, or by hitting "aC" on the keyboard.

Hope this helps,

--Mark

Mark Phillips @ Geometry Technologies, Inc.
P.O. Box 1170, Black Mountain, NC  28711
Phone: 828-664-1748
mb...@ge...       http://www.geomtech.com