Thorsten Froehlich wrote:
> 
> > I don't know exponential functions very well, but I agree that it
> > shouldn't be that difficult to get smooth blobs, and that it would only
> > require the individual blob components to use functions whose second
> > derivatives match up.
> 
> I am probably misunderstanding you here because you seem to suggest blobs
> are _not_ based on exponential functions?  They are [1]...
> 


docs.

A good introduction into this matter can be found on:

http://astronomy.swin.edu.au/~pbourke/modelling/implicitsurf/

Christoph

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