nicoladanese Posted December 10, 2017 Share Posted December 10, 2017 Hey All! I'm importing a bunch of animated spheres through alembic inside houdini, and I'm trying to delete all the spheres outside of a bounding object, this simple setup works but it culls points so I end up having half sphere deleted and the other half still on. How can I tell to keep or delete the whole sphere, without having half of it. it could be something like "if the center of the sphere is inside the bounding object keep it, otherwise delete it", or "if at least one point is deleted, then delete the whole sphere" thanks!! Quote Link to comment Share on other sites More sharing options...
3dome Posted December 10, 2017 Share Posted December 10, 2017 convert alembic into polygons, pack them with assemble then do the group thing on points and it should work Quote Link to comment Share on other sites More sharing options...
nicoladanese Posted December 10, 2017 Author Share Posted December 10, 2017 perfect! thanks!! Quote Link to comment Share on other sites More sharing options...
Noobini Posted December 10, 2017 Share Posted December 10, 2017 (edited) while visually it looks fine...to me it's testing for intersection against the sphere centres...not its surface/volume...so if the cutoffs is just slightly into the surface...now it won't qualify as 'to be deleted' I've done a workaround here..where it cuts as before...leaving holes in some spheres...then I check for 'holes'...if you have a hole..you're gone !!! DeleteWholeSphere.hipnc Edited December 11, 2017 by Noobini Quote Link to comment Share on other sites More sharing options...
Hamp Posted December 12, 2017 Share Posted December 12, 2017 Boolean SOP? Or fiddle about with Intersection Analysis SOP? Quote Link to comment Share on other sites More sharing options...
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