Makes a person wonder if a negative strength sort of thing could be applied 
which would only affect surfaces external to the parent/sub group.
As in the interaction of a finger into a palm of a hand both made of separate 
blob parent objects.
Just thought everyone might like to dream along with.
Actually there is kind of a way of doing this already.
Two identical blob groups; one positive, other negative strength. The two 
don't interact with each other but the surface to deform interactively needs 
to be a part of the positive strength blob group, the negative strength blob 
group would need to be minus that "touched" surface.

Message <363### [at] BEGONEVILESPAMMERSacmorg>, Darius Davis  typed...
>
>Mike wrote:
>> I've been wanting to do this for a long time, really!
>> 
>> Consider this (can your code handle this?):
>> 
>> #declare Blob1 =
>> blob {
>> threshold .3
>> sphere {<0, 0, 0>, 1, 1}
>> pigment {color White}
>> }
>> 
>> #declare Blob2 =
>> blob {
>> threshold .3
>> sphere {<0, 0, -1>, 1, 1}
>> pigment {color Blue}
>> }
>> 
>> blob {
>> blob {Blob1 translate 1*clock*y}
>> blob {Blob2 rotate 30*clock*y}
>> }
>
>In a word, yes.  I can't see anything there that would cause a problem. 
>The translates and rotates on sub-blobs all work OK, I've tested this
>extensively.
> 
>> Now imagine if you built a bunch of parts for a human using blobs and 
declared
>> each one, then incorporated each part into another one.  You could move the
>> parts to make the character walk and talk ect.
>
>The only problem is that each sub-blob component interacts with *every*
>other...  it's not possible to limit the interactions between
>components, even if the components are within different 'sub-blobs' - at
>least, it's not possible in any way I can see :)  So, if you move two
>blobbed hands together, they'll interact in the same way that blobs
>normally do if they both have the same ultimate 'parent' blob.  I've
>thought long and hard about this and I can't think of any way to prevent
>it.  (But I'm not going to stop thinking about it yet... ;)
>
>> I think it'll be great.
>
>Well, I've already had some great fun with it!  I think it's great, and
>it'd be my personal pleasure to share it with all!
>
>Cheers,
>
>Darius Davis

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.html
=Bob

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