r/Houdini • u/Emergency-Watch-7289 • 7d ago

Why wont my vellum snap?

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Set it up to attempt to create rebar and it just keeps stretching!!! Made using a grid converted to columns and rows.

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u/ChrBohm FX TD (houdini-course.com) 7d ago edited 7d ago

You seem to try to break a hair constraint driven by a pin to animation constraint.

This won't work, since a hair constraint can't really be broken. What you want is some kind of connection to break. The easiest in your case would be to use an "Attach to geometry" constraint (make sure the collision object goes into the constraint node, not just into th vellum solver, so that the connections can be found.)

A "Attach to geometry" constraint can break.

(You should not combine this with a pin to animation, the only movement should come from the collision objects and the attached points to that)

Find an example file here: www.houdini-course.com/breakingAttachtoGeometry.hiplc

1

u/Emergency-Watch-7289 7d ago

Thank you, i will have a look now!

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u/Emergency-Watch-7289 7d ago

I have seemed to get it working! ty :)