[Sidefx-houdini-list] wires dynamic problem

Mark Story mstory at xion.org
Thu Jan 15 14:09:32 EST 2009

Hmmm ... that's odd.  I don't know if it would be a reasonable work 
around, but you can assign those attributes as a point attr and dial in 
the exact mount of stretching/bending you need along the length of the wire.

The particular behavior you describe I've never encountered before, 
(I've done a lot of work with Wire DOPs) but am interested in what might 
be happening ... if you can't solve the problem, please post a hip file 
on one of the forums so we can take a look.

Good luck!


> I'm working on a simple DOP wire simulation. The setup is just one curve 
> (rather long).
> At SOP level, the root of the curve is constrained on a keyframe animation.
> In my DOP network, I'm using "Use Deforming Geometry" in the Wire Object.
> I use a SBD Pin Constraint on the root points ( 0-3 ) and then check 
> "Constrain To Animation" to keep
> the SOP animation on the 0-3 points.
> My problem is that I can't find a way to avoid some stretching between 
> the pin points and the first point moved by the wire solver.
> To limit the stretching, I set a high value on the Linear Spring 
> Constant. It works fine for all the points, except
> between the "pin points" and the "solved points".
> Any tips to stop this stretching is welcome.
> Cheers

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