Le 14/03/2011 10:41, JohnnyCatch a écrit :
> Le_Forgeron <lef### [at] freefr> wrote:
>> Le 14/03/2011 08:56, JohnnyCatch a écrit :
>>> Does anybody has figured out the location of the (curved) image plane of a 180°
>>> fisheye projection camera? So for a upward looking fisheye at height z = 0 -
>>> where is the image plane and what is the handling of scene objects which are in
>>> between the camera location and the image plane?
>>
>> The image plane is like the cake of portal.

> Thanks a lot but what you mean with "cake of portal"?
> Ciao

It does not exist.
The cake is a lie. (it's a classical quote from the game Portal)

So is the "image plane" for the camera in povray: it does not really
exist. It's an analogy taken from the photographic domain, in which the
image plane is the actual plane on which the film is set. Anything in
front of the image plane will appear on the film, anything behind just
won't appear.

Usually, the film is beyond the diaphragm, at the focal plane. (and the
image is inversed: the top of the view is at the bottom of the film,
same for left & right...)

For povray's main set of cameras, the film is just a point at the camera
location.

-- 
Software is like dirt - it costs time and money to change it and move it
around.

Just because you can't see it, it doesn't weigh anything,
and you can't drill a hole in it and stick a rivet into it doesn't mean
it's free.

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