number of vertices so that we can have consistent size, rendering
speed etc. among various terrain tiles.
-6/10/98 - Generate and store the transform matrix when rendering by
- material property so we don't have to push, transform, pop
- continually. See mesa code for gluLookAt()
-
5/26/98 - Add version checking to scenery files
4/25/98 - Roll all of Time/sunpos.cxx into Astro/sun.cxx