POV-Ray : Newsgroups : povray.general : Oblique projection : Re: Oblique projection Server Time
31 Jul 2024 08:23:54 EDT (-0400)
  Re: Oblique projection  
From: SharkD
Date: 5 Jan 2008 15:55:01
Message: <web.477fee53443d65d7e458a4ca0@news.povray.org>
"SharkD" <nomail@nomail> wrote:
> "Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
> > I see what you are trying to do, but actually to be equivilant, segment d should
> > equal segment b.  You are assuming that a is shown as the correct length, but in
> > the iso projection, a is shortened from what it should be (ie, not 1:1), whereas
> > segment b is already the correct length as it has no distortion from the
> > projection.  This means that the same horizontal camera sizeworks for both
> >
> > -tgq
>
> No. In the images, segment d *does* equal segment b. The isometric image uses
> the correct unit scale along all three axes (hence the term "isometric", "equal
> measure"). The distortion caused by the oblique projection causes the vertical
> (in this case) axis to become stretched.

I take that back. You're right. The scaling is not necessary.


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