POV-Ray : Newsgroups : povray.binaries.programming : hemispherical projection camera Server Time: 10 Dec 2018 06:43:02 GMT
  hemispherical projection camera (Message 1 to 3 of 3)  
From: pacoit
Subject: hemispherical projection camera
Date: 11 Apr 2005 20:55:00
Message: <web.425ae3f99179b488e11e1dbd0@news.povray.org>
I would like to develop a camera type that projects an image at the inside
of a hemispherical surface (as opposed to a flat surface as with
perspective camera). The purpose is to generate wide-angle views (up to
180deg, theoretically). Yes, the widest views would be curvilinear; but up
to ~120deg views should look pretty good. I would like to know: (1) if
someone has already developed such a camera; and (2) if someone can offer a
pointer to a description of the math to do this?

Thank you.


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From: Le Forgeron
Subject: Re: hemispherical projection camera
Date: 12 Apr 2005 07:25:46
Message: <425b77fa$1@news.povray.org>
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Wrong forum so far, no binary attachment detected.

pacoit wrote:
> I would like to develop a camera type that projects an image at the inside
> of a hemispherical surface (as opposed to a flat surface as with
> perspective camera). The purpose is to generate wide-angle views (up to
> 180deg, theoretically). Yes, the widest views would be curvilinear; but up
> to ~120deg views should look pretty good. I would like to know: (1) if
> someone has already developed such a camera; and (2) if someone can offer a
> pointer to a description of the math to do this?
> 

What about reading the documentation ?
Especially the sub-...-chapter about spherical projection in Pov-ray
Reference/Scene Settings/Camera/Types of projection.
(That should be 3.3.1.2.8 of the windows documentation, just launch
povray, hit F1 and there you are!)

So, I believe:
(1) Yes
(2) At worst, you could look at the code of the relevant camera.


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From: Mike Raiford
Subject: Re: hemispherical projection camera
Date: 12 Apr 2005 12:18:37
Message: <425bbc9d@news.povray.org>
pacoit wrote:
> I would like to develop a camera type that projects an image at the inside
> of a hemispherical surface (as opposed to a flat surface as with
> perspective camera). The purpose is to generate wide-angle views (up to
> 180deg, theoretically). Yes, the widest views would be curvilinear; but up
> to ~120deg views should look pretty good. I would like to know: (1) if
> someone has already developed such a camera; and (2) if someone can offer a
> pointer to a description of the math to do this?
> 
> Thank you.
> 

It's in the docs and this is not the appropriate forum for this type of 
question. This is designed for people who work on the source code of povray.

-- 
~Mike

Things! Billions of them!


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