Nieminen Juha <war### [at] punarastascstutfi> wrote...
> Chris Huff <chr### [at] yahoocom> wrote:
> : Good point, if you made a security camera monitor using the portal
> : pigment, the areas visible through it would change as you moved around
> : the monitor.
>
>   Not if you make the ray to go always in the same direction,
independently
> of the direction of the incoming ray.
>

But that wouldn't do exactly what you want.  That would only produce an
orthographic camera, not a perspective camera.  And what if you wanted your
camera security camera to do ultra_wide_angle.

Even better, if you could specify an entire camera for the pigment, it would
make it really easy to set up those cross-eye 3D images, since you could
create one main camera which points at two boxes, each with a pigment
created from another camera.

-Nathan

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In article <387958f4@news.povray.org>, "Nathan Kopp" <Nat### [at] Koppcom> 
wrote:

> I would use a syntax as a mix between image_map and camera.  You'd 
> specify a
> bunch of camera options, and then image_map options.  The image_map 
> options
> would determine the mapping (which determines the x and y values that), 
> and
> the camera options would determine how the new ray that was created (by
> calling create_ray with those x and y values).  Then, you'd just have to
> trace the ray that create_ray created.

I think I see what you are saying, sort of UV-map a camera onto the 
object?
Hmm, and two additional types would be a pseudo-orthographic(where the 
rays are always shot in the same direction, no matter what their 
position), and one where the rays are always shot through a point in 
space. This might be similar to perspective.

This could be a very fun tool, especially with warps and pigment_maps.

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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mirage ?

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Nathan Kopp <Nat### [at] koppcom> wrote:
:>   Not if you make the ray to go always in the same direction,
: independently
:> of the direction of the incoming ray.

: But that wouldn't do exactly what you want.  That would only produce an
: orthographic camera, not a perspective camera.  And what if you wanted your
: camera security camera to do ultra_wide_angle.

  Ok, my statement was incomplete.
  What I meant was that for a _specific point_ the ray could go always to
the same direction. The direction could then depend on the point calculated
(but not on the direction of the incoming ray), thus allowing perspective or
whatever.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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