2D Texture mapping a canonical box

We can define a box that is aligned along the principle axes by the minimum and maximum coordinate values, i.e., Xmin, Ymin, Zmin, and Xmax, Ymax, Zmax. Since each side of he box is unchanging in one of the coordinate values, we can map the 2D texture parameters, (u,v) to the two coordinates that are changing.

Two-Dimensional Texture domain
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Last changed May 29, 1999, G. Scott Owen, owen@siggraph.org