POV-Ray: Newsgroups: povray.general: How to calculate the focal length?: Re: How to calculate the focal length?

POV-Ray : Newsgroups : povray.general : How to calculate the focal length? : Re: How to calculate the focal length?		Server Time 4 Aug 2024 16:13:46 EDT (-0400)

From: Andreas Kreisig
Date: 29 Mar 2003 12:05:06
Message: <3e85d242@news.povray.org>

HermanS wrote:

> Andreas Kreisig wrote:..
>> Hi!
>> 
>> POV-Ray uses the horizontal angle to determine the clipping. Does
>> somebody know how to calculate the focal length when only the horizontal
>> angle is given?
>> 
>> Regards,
>> Andreas
>> 
>> 
> I suppose that what you mean by "focal length" is the direction vector
> (the distance between the focal point and the screen). The relation
> between the horizontal angle and the focal length (direction) can be
> found in the PovRay Help section 6.4.1.

Hm, I meant the focal length of a virtual lens. This is not the same as the 
distance between the focal point and the screen.

Regards,
Andreas

-- 
http://www.render-zone.com

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