On Tue, 12 Mar 2002 12:04:29 -0600, Christopher James Huff
<chr### [at] maccom> wrote:

>For normals, you have to transform by the transpose of this matrix.

You know, I've never done it that way. Doesn't make much sense unless
some tangents are involved. A normal is, after all, a vector. The only
thing you might want to do is to normalize the result if you need a
unit-length normal. So I don't get the transpose idea.


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] vipbg
TAG      e-mail : pet### [at] tagpovrayorg

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