Forums Technical Discussion Point cloud subframe interpolation

Point cloud subframe interpolation

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perpen
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Hi,
I have a point cloud sequence and I am trying to learn any approach to get interpolation between frames (ie, slow motion). The point cloud has a different point position and number every frame. I've read that Convert VDB Points translates and re-organizes the point cloud, but I could not find any examples or extended documentation.

Thanks,
Daniel
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kelvincai
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if point number is changing every frame, and there is no consistent pid attribute, you could use velocity attribute to advect partial frame (assuming velocity attribute exists)
Edited by kelvincai - March 27, 2018 21:47:48
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perpen
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Thanks for you reply. I am trying to get the velocity from the volume but I cannot make it happen. Here's a slice of the scene I am working on, with a few point cloud frames. I think Velocity from Volumes only works on Houdini volumes and not VDBs, right?
Edited by perpen - March 28, 2018 14:24:16

Attachments:
pointCloudTest.rar (4.1 MB)

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perpen
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I tried to use VDB Combine and ‘almost’ works I get interpolation frames but only with quality when the volumes are similar/close. As soon as we have some motion, holes appears. (Using the point cloud I uploaded in the previous post)

Attachments:
pointCloudTest_02.hipnc (76.1 KB)

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