Hi,

I'm trying to create an explosion where a “bomb detonate” inside a building causing all the windows to shatter and explode outward.

everything works fine when using the RigidBody Solver but when I use the Bullet solver it seems I can't get the window to hold together before the detonation frame occurs. the window shards explode immediately and then when the fieldforce get activated (using activation's expression) they get “pushed”, but at that stage they're already all over the place.

any hints of what I might be doing wrong?

thanks!

Hey JC,

two things:

1) you should constrain your window pieces together with a “gluenetwork constraint” dop - ( in combination with the gluecluster sop). – this holds your window together.

2) You can pin constrain the window corners with traditional pin constraints. This makes sure your window does not drop out of the frame as a whole piece at the start of the simulation.

– Also you can automate that entire setup so if your geo changes it automatically selects the corners etc.

That works quite well and is what I did for this spot:
http://www.youtube.com/watch?v=686S_NcudLY [youtube.com]

Good luck !

Hey Peter!

Thanks!
hmm yeah I guess I need to review my whole setup. I thought I could make it work with the field force but I might give it a go with the whole glue system I guess.


the example you posted is pretty much what I'm after, thanks for sharing!

Hey JC,

here are two threads where I have also posted a bit of information in regards to bullet &rbd - there might be some useful info in there for you too:

http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=20909 [sidefx.com]

http://forums.odforce.net/index.php?/topic/16830-bullet-or-rbd-for-fracturingcrumbling-effects/ [forums.odforce.net]