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[help-3dldf] Re: [metafont] Re: button-hole problem
From: |
Peter Vanroose |
Subject: |
[help-3dldf] Re: [metafont] Re: button-hole problem |
Date: |
Sat, 23 Apr 2005 16:41:14 +0200 (CEST) |
> The way I do perspective projection implies that the plane of
> projection is always perpendicular to the line from
> `Focus::position' to `Focus::direction', which are both `Points'.
Ah, so if I understand well, you are using parallel projection?
This is indeed a special case of projective projection, where the
"eye" point is far away (strictly speaking: at infinity).
-- Peter.