**comp.graphics.algorithms**

## Subject: **Re: 3D point location problem**

no! it is enough to test just one projection, but it must be choosen

carefully, e.g., it is not a good idea to project a polygon which is

perpendicular to xy plane to xy plane, try to estimate the normal n =

(nx, ny, nz) of the polygon, take A = max(nx, ny, nz) and project the

polygon in the A direction (i think this is called the biggest

gradient, but i'm not sure).

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