On Wed, 01 Mar 2000 07:18:37 -0500, Chris Huff wrote:
>In article <38bcf2c7@news.povray.org>, Nieminen Juha 
><war### [at] sarakerttunencstutfi> wrote:
>
>>   Isn't there some kind of proximity patch? Can't it be used for 
>> displacement calculations?
>
>I wrote a proximity pattern which is included in MegaPOV, it calculates 
>a value which depends on the distance from the surface of an object by 
>shooting rays at it...I am not sure how good it would be for 
>displacements though. It might just be too slow for an isosurface, 
>unless it could be calculated once and output as a density file.

Obviously, creating a density file from an object is trivial.  Once you 
have that, you can relatively easily perform a filter of some kind that fills 
in the voxels with a number corresponding to their distance from voxels 
containing the surface of the object, then build an isosurface with that.
But it'll take lots and lots of memory, probably more than the mesh.

-- 
These are my opinions.  I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html

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