spaceman_3 Posted March 28, 2016 Share Posted March 28, 2016 I'm starting work on a sequence where I need to break up some ground geo, have some pieces of it collapse, and have other pieces explode outward. Are RBD Packed Objects the way to go for something like this? The speed is great, as is the ability to use POP nodes, but are there limitations I should know about before I go too far and realize I should've used standard RBDs? In my tests so far collisions look to be less accurate for Packed objects. Is that me just doing something wrong or is that a limitation? Any input is appreciated. Thanks! Quote Link to comment Share on other sites More sharing options...
cwhite Posted March 29, 2016 Share Posted March 29, 2016 Collisions shouldn't be any different, assuming you were using the Bullet solver for both tests and not the RBD solver Quote Link to comment Share on other sites More sharing options...
spaceman_3 Posted March 29, 2016 Author Share Posted March 29, 2016 Collisions shouldn't be any different, assuming you were using the Bullet solver for both tests and not the RBD solver Thanks Cameron. I'll chalk it up to user error since everything seems to be working alright now. The speed of the Packed RBDs is incredible so it looks like the way to go...for now. I just hope there aren't any 'gotchas' that I'm not anticipating! Quote Link to comment Share on other sites More sharing options...
spaceman_3 Posted March 31, 2016 Author Share Posted March 31, 2016 Turns out the odd collision behavior was being caused by the VDB fracture. Pieces that looked separate were actually being treated as one piece. An Assemble node after fracturing fixes the problem. Quote Link to comment Share on other sites More sharing options...
Netvudu Posted March 31, 2016 Share Posted March 31, 2016 (edited) You were probably missing the name attribute that allows different fragments to be recognised by RBD Fracture as pieces. The Assemble node simply assigned that attribute. Packed objects should be fine unless you want to work with other solvers besides Rigid body, or want to use dynamic fracturing. Otherwise, it´s packed all the way. Not just the speed, but the memory footprint is WAY lower. Edited March 31, 2016 by Netvudu 1 Quote Link to comment Share on other sites More sharing options...
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