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Re: [help-3dldf] Re: button-hole problem
From: |
Laurence Finston |
Subject: |
Re: [help-3dldf] Re: button-hole problem |
Date: |
Sat, 23 Apr 2005 20:21:14 +0200 |
User-agent: |
IMHO/0.98.3+G (Webmail for Roxen) |
I wrote:
> The perspective transformation is created by taking an
> identity matrix and setting persp[2][2] = 0 and persp[2][3] = 1/distance
> (indexing starts at 0). This is why distance may not be 0.
Sorry, this should be Focus::persp.matrix[2][2] and Focus::persp.matrix[2][3].
Didn't mean to sow confusion. `persp' is a `Transform' and
`matrix' is a `Matrix', which is a `typedef' for `real[4][4]'. `real' is a
`typedef' for either `float' or `double', depending on how precise you want to
be (currently `double' in my sources).
Laurence