Le 04/01/2012 08:15, Charles C a écrit :
> Le_Forgeron <lef### [at] freefr> wrote:
> 
>> IMHO,
>> short answer: no.
>> medium answer: not with the current versions.
>> long answer: Maybe... you might try to play with the camera settings to
>> render full images of relevant size. Notice that some camera type (like
>> orthographic) are ok with such manipulation, but most are not.
> 
> To your medium answer, I've thought about this before:  It seems like there
> should be a camera type where the point location of the camera is not on the
> line extending perpendicularly from the center of the "pixel grid/array."
> (Sorry, I haven't reminded myself recently on the proper terminology.)  Or, to
> put it another way, the "pixel grid" would still be on a plane perpendicular to
> the direction vector, but offset.
> 
> If that made any sense, such a camera type would solve his problem neatly.

Yes, it does make sense, it was implemented physically in some actual
photograph apparatus (most often used to take straight picture of front
of house & building from the corner of the street: a normal perspective
camera would end up with 2 or 3 horizon points (as in classical
painting), whereas these strange and complex apparatus would move the
picture in the focal plane, or whatever, to achieve parallel lines on
the picture for the parallel in reality which are also on a parallel
plan to the picture... The lens is mobile in many way (translate &
rotate (tilt)), the diaphragm might be considered fixed, and the picture
is taken on mobile plate (which also translate & tilt...), all with
gussets/bellows to keep the inside dark.

Now... to code that for povray... some camera types (orthographic &
spherical, even maybe some cylindrical) are just "a tuning away" from
your need: no need to change the code, just change the parameter such as
location, up&right for othographic, look_at & angle for spherical.

The perspective type need specific code and new properties to achieve
that effect. Same would go for panoramic & ultrawide_angle, and at least
2 of the cylindrical types.

I guess you're interested only in the perspective one, right ?

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