Switched to calling Acos() wherever appropriate
Increased buffer size to accommodate 3-digit exponents
Bug fix for Windows (and other systems that use 3-digit exponents)
Major code reorg, moving mgflib to common and introducing BSDF material
This form allows you to request diffs between any two revisions of this file. For each of the two "sides" of the diff, select a symbolic revision name using the selection box, or choose 'Use Text Field' and enter a numeric revision.