huge Posted January 19, 2017 Share Posted January 19, 2017 (edited) Hi everyone, search all the forums and can't find a way to glue constraint a voronoi fractured object to multiple animated objects .It works really fine on one object, but no way to make it stick on two or more objects Some tests with hardconrel work, but a lot of wobbling, and also, i need the simplicity of the glue constraint(i want to use the strength factor) I join my test file, if somebody can help me, it would be really appreciated! thx by advance, and excuse my bad english, I'm french... cheers PackedConstToMultiAnmObj.hip Edited January 19, 2017 by huge wrong file extension Quote Link to comment Share on other sites More sharing options...
rich_lord Posted January 19, 2017 Share Posted January 19, 2017 I couldn't get glue to work either, but hard constraints seemed to work really well. In this file I use glue to stick together the fractured geometry, but use hard constraints to attach just the far right and left pieces to the animated geo. rbd_stick_to_moving_things.hip 1 Quote Link to comment Share on other sites More sharing options...
cwhite Posted January 19, 2017 Share Posted January 19, 2017 Glue doesn't work in this case because groups of glued objects are simulated together as a *single* rigid body with a compound collision shape, and impacts can then cause shapes to break off into separate objects. That means that If there are multiple animated static objects in a glued chunk, there's no sensible way to update the transforms of the other objects in the chunk - the solver just ends up picking the first one. Additionally, if there's only a single glued chunk, there's only one object in the sim and there won't be any impacts that cause the glue to break. As the previous post mentioned, pin constraints are a better choice for the boundary region since they behave as a more traditional constraint where constrained objects are simulated separately. 2 Quote Link to comment Share on other sites More sharing options...
rgblues Posted January 20, 2017 Share Posted January 20, 2017 Hi, I made this setup a while ago, it's ripping a wall constrained on two objects animated differently. It was some kind of an earthquake proof of concept I did to understand constraint networks...maybe that can help. Cheers Wall_pinned_on_2_animated_objects.hipnc 2 Quote Link to comment Share on other sites More sharing options...
huge Posted January 20, 2017 Author Share Posted January 20, 2017 thanks everybody for your advices! thx rich_lord and cwhite, tried the different constraint type and yes it works definitly well with the hard constraint need to change the constraint_type attribute from all to position, but it s ok rgblues , I digged your hip and that's exaclty what i'm trying to do thx a lot for sharing!!! Quote Link to comment Share on other sites More sharing options...
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