Le_Forgeron <jgr### [at] freefr> wrote:

> not really.
> Unless your default camera is
> ...
>   up image_height*y
>   right image_width*x
> ...
> but that's not the camera you get from
>
> camera{ orthographic }
>
> || up: 0.000, 1.000, 0.000
> || right: 1.330, 0.000, 0.000
> || location: 0.000, 0.000, 0.000
> || direction: 0.000, 0.000, 1.000

Well, then I guess I didn't remember correctly  ;)

I vaguely recalled this discussion:
http://news.povray.org/povray.advanced-users/thread/%3Cweb.5845a06cc97737fcc437ac910%40news.povray.org%3E/

So modifying that so Pixel "size" is described in POV-units, then we could have

#macro Zoom (PixelSize)
camera {
 orthographic
 location <0, 0, -PixelSize>
 look_at  <0, 0, 0>
 right (x*image_width )*PixelSize
 up    (y*image_height)*PixelSize
 }
#end


(I haven't entirely determined what the best camera-to-lookAt distance is to
avoid some weird things happening)

Post a reply to this message