how to make parent constraint in bullet sim

[tagosaku]

hi, I have a question about bullet sim's constraint. As a attached picture, I made a Glue constraint between active packed object and animated static packed object. When siming, I expect the bottom box start animating with constraint, like a parant. However, only the top box and one side of constraint point are moving. 

You might say to just make parent animation in SOP without bullet sim, but eventually I want to attach more fragment objects with soft constraints on the bottom part. I would appreciate for any helps, thanks! 

[anim]

I assume your constraint geo is animated and therefore by default it's being updated every frame, so you either make sure that Overwrite With Sop checkbox on your constraint network is 1 only on initial frame or make sure your constraint geo is not animated, or maybe there is another issue

please atach your hip file next time, it makes things easier, I suppose you'd be happier with fixed hipfile back or direct advice to your particular issue rather than only screenshot claiming it works

here is example of a working setup 

rbd_glue_active_to_aimated.hip

[tagosaku]

Tomas, thanks for your advice. I don't install h18 yet, but I figured out how to fix by your hip file and comment. I think problem was SOP_solver and constraint_network nodes. It's kinda tricky to work them properly.  This time I needed to turn on blur flag on relationship_geometry node in sop solver. 

I still don't completely understand sop solver node > dop_import node > objectMask parm, and constraintnet work node > relationship tab > constrained objects parm and attach internal constaint to object toggle. Sometimes I need to turn on/off or keep default, or write specific object names, etc. That lacks of fundamentals knowledge caused the problem this time.