Christopher James Huff wrote:
> 
>>That looks very nice and offers a lot of interesting possibilities (for 
>>both textures and isosurfaces).  Could the speed improvements also be 
>>used for the regular crackle pattern?
> 
> 
> Very unlikely. The crackle pattern stores a cache of 125 points in an 
> array. Running through a BSP tree for those points would be faster than 
> testing each of them for every evaluation of the pattern, but building 
> that tree would be much slower than building the array.

I feared something like that.  But in many cases where the crackle 
pattern is nice to use only a relatively small area of the pattern space 
is actually evaluated.  In these cases i could imagine a system like this:

- initially build a BSP tree for all points within a certain area 
(possibly customizable with a parameter).
- when a point outside this area is evaluated use the old technique.
- when a certain number of points outside needed to be evaluated rebuild 
the BSP tree for a different/larger area.

I don't know if this idea is feasible or would be efficient of course.

Christoph

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