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Is this possible in POVRAY? A map with the depth of each pixel in the image,
without the need of altering the input file like texture and light
deletion, z-gradients etc. Thanks!
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Wasn't it nfm who wrote:
>Is this possible in POVRAY? A map with the depth of each pixel in the image,
>without the need of altering the input file like texture and light
>deletion, z-gradients etc. Thanks!
You need to use MEGAPov 1.1 rather than official POVRay. There's a post
processing facility which does it.
Take a copy of the supplied example file postproc\depth.pov, then make
the following changes:
1. Replace the line that says #include "ppcontent.inc" with one that
#includes your original scene file.
2. Set the DepthMin and DepthMax values appropriately for your scene, so
that the distances from the camera to the objects you are interested
in lie between these values.
Do not make any changes to your original scene file.
This will render your scene in the normal way but then also output a
depth postprocessed version.
--
Mike Williams
Gentleman of Leisure
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nfm wrote:
> Is this possible in POVRAY? A map with the depth of each pixel in the image,
> without the need of altering the input file like texture and light
> deletion, z-gradients etc. Thanks!
Short answer: no.
Long answer: MegaPOV offers access to the distance of the first
intersection as part of the post processing patch but this requires a
change in the scene file as well. This is however no way the 'depth of
a pixel' - in a raytracer this is not clearly defined at all since the
contributions to the color of a pixel can come from different distances.
It is however quite convenient to generate a depth image with what you
call 'hacks' simply using conditionals in SDL.
Christoph
--
POV-Ray tutorials, include files, Sim-POV,
HCR-Edit and more: http://www.tu-bs.de/~y0013390/
Last updated 23 Sep. 2004 _____./\/^>_*_<^\/\.______
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It is very good that the depth map is created paralelly to the rendered
image.
I know that in POVRAY there are transparency/reflections/lensing/depth of
field effects, but what I would need is just a simple first intersection
depth map.
Thanks for the answers!
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