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vanillacoke

2 questions, please...

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number 1: Would anyone care to explain to me the reasoning behind the code for the bresenham circle algorithm? I am somewhat confident that I comprehend the idea, but I can't find any good information about the code itself with the 4's and 6's and 10's... anyway, can anyone help? number 2: Does anyone know of a good, comprehensive but technical, resource for reading about high-quality normal maps, texture maps, and possibly even other maps for parametric surfaces? By high quality I mean NOT demo work-arounds, but really mathematically accurate maps blah blah blah.

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Check out "How many ways can you draw a circle?" by Jim Blinn (it''s in his book "A trip down the graphics pipeline"). That should answer ALL your questions about circle drawing - including the 4''s and 6''s and 10''s

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or "zen of graphics programming"
the chapters you''re interested in are 17 and 18, where he explains and implements Hal Hardenburgh''s circle drawing algorithm...

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