Subject:
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RE: From Screen to Paper Printing (PPI/DPI Question)
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Newsgroups:
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lugnet.publish, lugnet.general, lugnet.cad.ray
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Date:
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Thu, 20 Dec 2001 20:23:25 GMT
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Reply-To:
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<BRAM@POihatespam.CWRU.EDU>
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Viewed:
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99 times
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Tim Courtney writes:
> Good point. Since I've never tried to render a square image,
> I've never run across this.
>
> I'm curious though, why do you need to do this? I figured it
> would be like looking through a window - it doesn't matter
> what shape the frame is, what you see on the other side has
> the same proportions. I guess to me at least (relatively
> inexperienced with POV - all I do is modify camera positions
> and the background color), it doesn't make much sense.
No, POV-Ray's rendering engine doesn't really care what the dimensions
of your image are. It only cares about what you tell it the aspect
ratio is. If you render with a default camera (4/3 ratio) to a square
output image, you'll get an image that's horizontally squished.
In your camera object, you should see:
sky -y
right -4/3*x
This sets POV-Ray's coordinate system to match Ldraw: -y is up, and -x
is to the right. If you want a square image, you would use:
sky -y
right -x
If you wanted a widescreen image, you would use:
sky -y
right -16/9*x
HTH,
--Bram
Bram Lambrecht
bram@cwru.edu
www.bldesign.org
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