Flamingburrit008 Posted October 26, 2018 Share Posted October 26, 2018 Hello, I've been playing around with vellum in Houdini 17, and I've run into a bit of a problem. For some reason, can't seem to dynamically break weld constraints using the vellumconstraintproperty node. It seems to work correctly when I use the stitch points constraint, but nothing happens when I use weld points. I've found a work around using a geometry wrangle, but I was just curious as to why this other method wasn't working. I've been searching through the documentation, but couldn't find an answer. Thank you to anyone who can help! vellum_break.hipnc Quote Link to comment Share on other sites More sharing options...
Noobini Posted October 26, 2018 Share Posted October 26, 2018 that is weird... Quote Link to comment Share on other sites More sharing options...
anim Posted October 27, 2018 Share Posted October 27, 2018 it's because when you weld, there is no stretch constraint created, just optional bend constraint and because Vellum Constraint Property acts on constraint primitives contained in Constraint Geometry data, since welds are not constraints, there are no weld constraint primitives to set breakthreshold to your wrangle acts on Geometry and therefore cloth points directly, which is exactly the place where weld attributes like breakthreshold, weld and breaktype live Quote Link to comment Share on other sites More sharing options...
AlSk Posted January 14, 2019 Share Posted January 14, 2019 (edited) I encounteres a difficulty in using a modified version of the upper setup. If I bypass the Vellum Constraint SOP (Weld Points), the setup freezes from the first frame on. I tried to evade the problem by using haspointattrib(), but this didn't help either. Any ideas why this is happening and how to deal with this? vellum_break_error.hipnc Edited January 14, 2019 by AlSk Quote Link to comment Share on other sites More sharing options...
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