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View Full Version : Stretching like a piece of Gum???

Mr Fudge
11-28-2002, 02:08 PM
Lets say I had a piece of geometry like a really long neck. Now I want too strecth it, but as it stretches I want it to taper in the middle like a piece of gum would if you pulled it apart. I don't want to use a lattice cos there must be a better way and the transition is linear. I want there to be falloff but much more precisely than by doing by eye. I suppose I could create a cluster and give it major falloff but maybe there is a better way to do it.

Tips welcome.

- F
Mr Fudge
11-28-2002, 02:25 PM
Like so....
svenip
11-28-2002, 02:56 PM
for me the cluster way should be possible. you just may need to paint the clusterweights correctly, so that the cluster looses it's influence more and more.
Mr Fudge
11-28-2002, 03:07 PM
So far the cluster has yeilded the best results when I put a bit more effort into weighting it properly . But I always assume there is a more obvious technique that hasn't occurred to me yet. It's always good to get another opinion.

Best way to learn IMHO.

- F
svenip
11-28-2002, 03:27 PM
i would say it will always end up with weighting. so for me i would just setup one cluster at each end and they should loos influence to the middle of the surface.

their may be a solution with softbodies, but it's harder to control.
steveblake
11-28-2002, 03:39 PM
a nice set of blendshapes should get you half way there...
dwalden74
11-28-2002, 03:43 PM
How about a squash deformer???
Mr Fudge
11-28-2002, 03:59 PM
Clusters are by far the easist to implement and control for what I want to do. After experimenting for a while I have gotten it to beahave properly and now everything is just peachy.

Thanks though...

- F
steveblake
11-28-2002, 04:05 PM
fancy making a gif anim of it??

like one of these...

http://www.cgtalk.com/showthread.php?s=&threadid=28922
artifish
11-28-2002, 04:07 PM
in case you are a little adventurous and want to dive into the wonders of math, you could do a search on "minimal surfaces" and "catenoid" (a special type of minimal surface which suits your problem) - > http://mathworld.wolfram.com/Catenoid.html
Mr Fudge
11-28-2002, 04:31 PM
I reckon I'll post it early next week sometime.

Till then,
- F
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