Jesper Rahlff Posted October 11, 2021 Share Posted October 11, 2021 Hey Guys. I was wondering if there is a way to delete particles in a Vellum simulations when they have had constraints? The scenario I have setup the particles have constraints, then I remove the constraints based on a condition, and when I try to remove the particle as well it craps out on me. Attached is a simple example file to showcase the issue.DeleteVellumParticlesWithConstraints.hiplc Thanks Quote Link to comment Share on other sites More sharing options...
ryew Posted October 11, 2021 Share Posted October 11, 2021 Keep in mind the points are all part of the same patchname, though - vellum doesn't like it when you try and alter geometry components for the same patchname on the fly, so it's wiping out the whole patch/sphere instead of just those specific points where P.y < 0. This has tripped more than a few people up, myself included. Quote Link to comment Share on other sites More sharing options...
Jesper Rahlff Posted October 11, 2021 Author Share Posted October 11, 2021 so how do I get around this? Quote Link to comment Share on other sites More sharing options...
ryew Posted October 11, 2021 Share Posted October 11, 2021 I haven't seen an indication in discussions that you can for this particular issue aside from separating/culling by patchname; However, if you haven't already, it's worth posting this issue over on the SideFX forums to see if one of their engineers can offer any solutions (and maybe H19 has provided a way forward for this particular sticking point) Quote Link to comment Share on other sites More sharing options...
Jesper Rahlff Posted October 23, 2021 Author Share Posted October 23, 2021 This seems to be the way to do it. It is a bit complicated for such a simple thing but it works. DeleteVellumParticlesWithConstraints_fix.hiplc 3 Quote Link to comment Share on other sites More sharing options...
maxisnatch Posted November 6, 2021 Share Posted November 6, 2021 I also wish for a more elegant solution but well done for figuring out this deletion order combo ! Quote Link to comment Share on other sites More sharing options...
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