POV-Ray : Newsgroups : povray.general : Oblique projection : Re: Oblique projection Server Time
31 Jul 2024 08:19:43 EDT (-0400)
  Re: Oblique projection  
From: SharkD
Date: 3 Jan 2008 14:35:01
Message: <web.477d37c9443d65d7849476bf0@news.povray.org>
"Trevor G Quayle" <Tin### [at] hotmailcom> wrote:
> This is a top side oblique, which seems fairly easy to achieve, you need to
> basically adjust the aspect ratio of the camera to the correct proportions
> which you have done.  I haven't been able to get this to work properly with
> front or side projected oblique.  For the top-side as you've shown, the image
> and camera merely need to be stretched, whereas with front/side, it also needs
> to be sheared.

Simply rotating the output image in an image editor should achieve the desired
results.

> You shouldn't need to have to stretch the actual object using this method.  The
> problem is you are only rotating up 30deg so when you stretch the aspect ratio
> to make the top square, the projection length becomes too long which is why you
> are having to shorten it.  In order to get the 1:1 legth without having to
> stretch the object, you need to rotate up 45 degrees before stretching. Try
> this:

Thanks! That's much simpler.


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