From: "Jason" <dygron AT ace-net DOT com DOT au>
Newsgroups: comp.os.msdos.djgpp
Subject: Terrain Shading in Allegro
Date: 13 Apr 1998 23:59:04 GMT
Organization: Easy Access Australia
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To: djgpp AT delorie DOT com
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	I have been using Allegro for drawing 3D terrains from a set of random
points (turned into a set of edge-connected triangular polygons) and it
works well, but I really need to shade the terrain for a bit of realism and
better perspective (at the moment, its just a big unicolor blob with the
polys in the right place!).  Texture mapping doesn't seem to be a realistic
way of getting shading working so I was wondering if anyone knew how to
shade a series of triangular polygons across the whole set of polygons (as
if the light source was shining in one place onto the whole set of
triangular polygons).  Any information pertaining to this subject would be
greatly appreciated as I am relatively new to 3D programming.
	Thanks,

	Jason.