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probiner

Vellum Hair: polycurve spinning instead of bending from pinned points.

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Posted (edited)

Hi
Doing a vellum coiled cable sim and while I'm happy with the feel of it I've noticed I have some spinning close to pinned points, instead of bending. Is there a way to avoid this? Video shows the sweeped curve and then it shows the group used as pinned.
phone_coil_cable_spin.mp4

I've noticed that vellum does not transform the input geo attributes (am I missing something?) so instead I used a point deform to preserve the sweep's orientation. Works well for most of the curve but not great on the tips.
All constrains are super stiff so the coil shape can be maintained, so this could be the cause of the geo not bending but twisting. Still I wasn't expecting that twist.

The Settings I'm using on Constrain and the Solver are below. Let me know if there's something to consider to avoid this behavior or to have Vellum transform input attributes. Thanks.
 

image.thumb.png.5e392359a0fe8baaa83c8148e102ac28.png

 image.png.e06904444d6daffb6bbce1da1bb6211f.png

Edited by probiner

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