Justin K Posted May 23, 2018 Share Posted May 23, 2018 Hey all, Im having some issues with object interaction. Im trying to get some spheres emitted from a particle sim to interact with cloth as either a static or rbd object (see pic). As a ntoe I posted this already in the wrong thread by mistake . I have encountered problems with both methods. The static object approach errors out because the geometry is changing on a per frame basis- each frame has a changing number of spheres. Because the particle sim was run over the frame range, the number of primitives copied to the pts is changing each frame--this causes the static object to error out (see pic) On the flip side the RBD object technique doesnt work-- because I cant import animating geometry at all (or perhaps I just dont know how--there seems to be some stuff on the sidefx thread-- but im not sure it applies here? https://www.sidefx.com/forum/topic/30392/ ). Overall Im getting the impression that animation on packed objects is intended to happen within the solver itself, not beforehand.? The very last thing I cam across was this---this setup allows you to emit rbd objects per frame from another pop setup-- https://www.sidefx.com/forum/topic/34178/ but if the particles are animating the rbd object will duplicate each incoming object per frame. see pic. Any suggestions for how to accomodate this? I would like to keep the rain sim separate from the cloth work if possible, but cant find a workaround for the above issue. As far as due diligence I have looked at alternative stuff on the grain solver side (Johnny farmfield stuff) and have tried working with active and deforming attributes to get a solution, but no luck. Ive simplified the scene and kept only the basic stuff. And also added the latest scene file I came across Thanks in advance for any help! RBD_from_particles.hiplc FROM_HELP.hipnc Quote Link to comment Share on other sites More sharing options...
Justin K Posted May 23, 2018 Author Share Posted May 23, 2018 As a note Im watching the particles masters class from houdini 13 to see if I can get any tips and info--the last 15 minutes seem like they might have what im looking for Quote Link to comment Share on other sites More sharing options...
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