Daniel Nilsson wrote:
> Tim Attwood wrote:
>>> Is there a way to calculate and/or export the internal volumes of
>>> the finite
>>> CSG objects in a POV-Ray scene?
>>
>> Using extents of an object you can calculate the
>> volume of the bounding box, then use a large number of
>> random point samples within the bounding box to determine
>> the percent of samples that are inside the object, then
>> the volume can be estimated to be that percent of the
>> bounding volume. This is sort of like filling a real object
>> with water then measuring the water.
>
>
> A better way to sample the volume (although requiring external
> processing) may be to render a series of slices of the object and then
> sum the number of covered pixels in those images. This can be done
> using an object pattern mapped to a plane and animating the
> translation of the pattern along the axis perpendicular to the plane,
> much like a CAT-scan really.

This would require exactly the same amount of insideness tests as the 
suggestion by Tim Attwood; only they would be done during rendering instead 
of during parsing.

Rune
-- 
http://runevision.com

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