whitecanvas Posted March 3, 2019 Share Posted March 3, 2019 Hello everyone, I have been studying Bullet solver and constraints for destructions,and run into some problems with Hard constraints. As you can see from the attached I have 2 main problems: 1. the Hard Constraints are read by the network since it visualizing them but they stretch all the way in a weird manner. Now i searched a lot and only found this thread which i could relate to https://www.sidefx.com/forum/topic/44390/ . Although it sound like the problem i am having i don't understand what he means by - "if you have deforming rbd where all motion is from deformation then you need to constraint to the actual points and not to the rbd object itself as rbd object is not moving, the link you are seeing is probably just visual line to center of mass" 2. the rbd packed object disappears if i set the "constraint force mixing" paramter on the hard constraint node Any help is much much appreciated Many Thanks FrancescoHC_Problem.hipncHC Quote Link to comment Share on other sites More sharing options...
ProceduralFrankie Posted March 4, 2019 Share Posted March 4, 2019 Anyone? Quote Link to comment Share on other sites More sharing options...
vicvvsh Posted March 4, 2019 Share Posted March 4, 2019 23 hours ago, whitecanvas said: Hello everyone, I have been studying Bullet solver and constraints for destructions,and run into some problems with Hard constraints. As you can see from the attached I have 2 main problems: 1. the Hard Constraints are read by the network since it visualizing them but they stretch all the way in a weird manner. Now i searched a lot and only found this thread which i could relate to https://www.sidefx.com/forum/topic/44390/ . Although it sound like the problem i am having i don't understand what he means by - "if you have deforming rbd where all motion is from deformation then you need to constraint to the actual points and not to the rbd object itself as rbd object is not moving, the link you are seeing is probably just visual line to center of mass" 2. the rbd packed object disappears if i set the "constraint force mixing" paramter on the hard constraint node Any help is much much appreciated Many Thanks FrancescoHC_Problem.hipncHC It works if you animate geometry after assemble sop, set Initial Object Type parameter to Create Animated Static Object in RBD Packed Object and set Constraint Force Mixing from 0 to 1 value in Hard Constraint Relationship dop. HC_Problem_01.hipnc Quote Link to comment Share on other sites More sharing options...
whitecanvas Posted March 6, 2019 Author Share Posted March 6, 2019 Thank You a lot! Quote Link to comment Share on other sites More sharing options...
inigo Posted April 15, 2019 Share Posted April 15, 2019 Hi!! I am new at houdini and im trying to learn some basics in destruction but i have an easy setup and i dont know why is not working. I would appreciate any help. I leave the scene here. Thanks!! hard_constraint.hipnc Quote Link to comment Share on other sites More sharing options...
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