Forums Technical Discussion FLIP VDB collision

FLIP VDB collision

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hanton
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Joined: Oct. 2011
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Hi,

I have a container and want to fill it with FLIP. I use VDB for collision because it's fast. But, after I set up the scene, my container always leaks fluid, anything wrong with my VDB collision setup or anything wrong with my container topology?

Thanks!

Attachments:
FLIP_VDB_test.hip (1.3 MB)

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jason_iversen
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Without having seen your file, VDBs can be dangerous for collision because they only store a narrow band of data around your geometry. You should try to make sure you are doing a thicker than default band, or convert to Volume and reinitialise the SDF.

Hope I'm not misreading your issue!
Jason Iversen, Technology Supervisor & FX Pipeline/R+D Lead @ Weta FX
also, http://www.odforce.net [www.odforce.net]
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hanton
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Thanks, jason! It works. I created a thicker proxy object, convert it into VDB volume, and use it as proxy volume in DOP.

However, I have a new problem now, how to parent the proxy object to my cup, so the proxy object can move with the cup? I used the Shelf Tool “Parent”, but it failed.

Attachments:
parent_test.hip (1.5 MB)

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