Single point filtering

[Stephen Gatesy]

We would like to be able to filter the coordinates for a point (or group of individual points) that is/are not involved in a rigid body.

I understand that storing the filtered version is awkward, so I imagine simply filtering on export only would be an relatively easy step.

[Elizabeth Brainerd]

I think this is the same as Issue #9

[Stephen Gatesy]

#28 and #9 both relate to filtering points (rather than rigid bodies), but I see it as an export issue rather than a plot issue. If a user is only allowed to filter 3D point coordinates as a form of export, then there is no way to misuse the filtered point data for rigid body calculations within XMALab unless those points are re-imported in some way.

Yes, other programs can do the filtering, but I'd rather have export without visual feedback (I can always compare raw xyz data to filtered xyz data in Maya) than have any potential plot window confusion torpedo this functionality. All of our footprint projects (both bird and human) would benefit from this capability.

[Benjamin Knorlein]

fixes #28: 3D points can be filtered when exporting

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