hcs Posted September 17, 2012 Share Posted September 17, 2012 Hey everyone, I'm new to Houdini and I'm trying to get a sim going with an RBD point object controlled by a pop sim. When the particles hit a surface, they stick to it and I want the instanced geometry to align with the surface normals so that all the instances have the same orientation relative to the surface. Any suggestions about how I can use the surface normals of the attractor to align the point object geometry? Thanks Quote Link to comment Share on other sites More sharing options...
old school Posted September 17, 2012 Share Posted September 17, 2012 Check out the Particles Leaves vimeo vids from Peter Quint here: https://vimeo.com/17309337 Quote Link to comment Share on other sites More sharing options...
hcs Posted September 19, 2012 Author Share Posted September 19, 2012 Thanks for the link, Old School. The method in the tutorial was a bit different from what I needed (my particles take on a new orientation when they land, not their original one) but it drew my attention to the hit normal attribute, which I hadn't known existed before and now I think I'm on the right track in that respect. I did have one other question though: since this method uses a regular particle system, not an RBD point object, how can I get the inter-particle interactions like I had in the RBD point object? I tried the interact pop but the particles still go through each other. Do you have any ideas what I can do about this. Thanks Quote Link to comment Share on other sites More sharing options...
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