[Bf-committers] finding co-planer faces.

[bf-committers@blender.org]

After you've tested the normals and found they are the
same, you can compute the plane equations and test to see
if they are equal (or close enough)

N - Normal for both faces
P0 - Point on first face
P1 - Point on second face

	VECT_DOT( d0, N, P0 );
	VECT_DOT( d1, N, P1 );

	if (fabs (d1 - d0) < ERROR_LIMIT) {
             faces are co-planer
         }

--
Todd Koeckeritz, zaz@visi.com

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