Am 09.03.2016 um 21:12 schrieb Le_Forgeron:
> Le 06/03/2016 15:49, clipka a écrit :
>> Y'all might want to try the latest and greatest POV-Ray development release:
>>
>> https://github.com/POV-Ray/povray/releases/tag/v3.7.1-alpha.8509766%2Bav119
>>
>> It adds a new function-based user-defined camera:
>>
>>     camera {
>>       user_defined
>>       location {
>>         FUNCTION, // x-coordinate of ray origin
>>         FUNCTION, // y-coordinate of ray origin
>>         FUNCTION  // z-coordinate of ray origin
>>       }
>>       direction {
>>         FUNCTION, // x-coordinate of ray direction
>>         FUNCTION, // y-coordinate of ray direction
>>         FUNCTION  // z-coordinate of ray direction
>>       }
>>       CAMERA_MODIFIERS
>>     }
>>
>> where each FUNCTION takes the screen coordinates as parameters, ranging
>> from -0.5 (left/bottom) to 0.5 (right/top).
>>
> 
> It's nice, but it is not generic enough:
> you cannot have a non-traced area, like for fisheye and omnimax camera.
> 
> Yep, give me a finger, I would take the arm to the elbow... of the other side, with
a leg or two.

Ooooh -- I can give you _the_ finger if you like:

To identify regions that should be left untraced, simply have the
`direction` functions all return 0. :P

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