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D Matthews wrote:
>
> OK, I think I've searched all the easily available help files, and I can't
> find the answer to this one. Is there some place where the actual formulas
> for the internal functions are available (without trying to puzzle out the
> source code)?
No, but finding it in the source isn't really that difficult. Just look
into 'fnintern.cpp':
DBL f_spikes(DBL *ptr, unsigned int) // 62
{
DBL r,x2,y2,z2;
x2=PARAM_X*PARAM_X; y2=PARAM_Y*PARAM_Y; z2=PARAM_Z*PARAM_Z;
r= exp(-(x2+y2+z2)*PARAM(3))*PARAM(4)
-exp(-(x2*PARAM(0)+y2*PARAM(0)+z2)*PARAM(1))
-exp(-(x2*PARAM(0)+y2+z2*PARAM(0))*PARAM(1))
-exp(-(x2+y2*PARAM(0)+z2*PARAM(0))*PARAM(1));
return(-r*PARAM(2));
}
I think that's pretty self explanatory.
Christoph
--
POV-Ray tutorials, IsoWood include,
TransSkin and more: http://www.tu-bs.de/~y0013390/
Last updated 13 Aug. 2002 _____./\/^>_*_<^\/\.______
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