Carve node on multiple segments line problem

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Hi, Everyone, Houdini green hand here.
I run into a problem, I was trying to create a growth vine that have multiple branches. find shortest path node does a great job, And I attach a carve node after it to create growth animation. but when I merge those overlapping segments, animation changed. they both start on every segments at the same time. I want them like it before did, which is when the main branch had travelled their position, and then they start to growth, not the same time. How?

Best Regards,
Sead
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Here is a solution.

Attachments:
curveGrowth.gif (129.9 KB)
branched_growth.hipnc (203.4 KB)

Sean Lewkiw
CG Supervisor
Machine FX - Cinesite MTL
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