animatrix

VEX Principal Component Analysis SOP & DOP Microsolver (Patreon)

Published:

2017-10-05 18:33:01

Imported:

2026-06

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Hey guys I am amazed by your support. Thanks so much :)

For my very first post, I want to share a major tool.

You can use it to solve all kinds of difficult problems. I made a simple scene showing how to fill holes in a point cloud. Because it's very domain specific, as with many things in Houdini, you need to adapt and tweak based on your scenario.

In the second scene I show how to fit an oriented bounding tube to a point cloud.

https://www.dropbox.com/s/yqxq0dnugs7qdir/PCA_SOP_Animatrix.otl?dl=1

https://www.dropbox.com/s/7ahtym8eotb78no/GasPCA_DOP_Animatrix.otl?dl=1

https://www.dropbox.com/s/nrzdcb2lbzuq5rm/pca_pcloud_fill_holes.hip?dl=1

https://www.dropbox.com/s/aeuw55kax3z1oi9/pca_oriented_bounding_tube.hip?dl=1

Enjoy :)

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Principal Component Analysis SOP & DOP Microsolver

Performs PCA (Principal Component Analysis) on a point cloud. It can be used to solve a variety of problems in production, from point cloud normal estimation, to filling up holes in a point cloud with no other information other than position, from fitting any kind of geometry onto a point cloud (oriented cylinder, oriented bounding box, etc) to computing best fit line/plane, to matching the transform of an animated point cloud onto another geometry and so on.