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Old 06 January 2013, 18:57   #41
Mrs Beanbag
Glastonbridge Software
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Join Date: Jan 2012
Location: Edinburgh/Scotland
Posts: 2,202
Raytracing IS physics, it is the physics of light beams. The mathematics of reflections is EXACTLY the same as that of spheres bouncing off flat surfaces. The difference is that raytracing involves potentially millions of rays, but the rays don't interact with each other. A million rays bouncing off planes is one thing. A thousand rays bouncing off a thousand other rays is... a million things.
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