I started playing around with H12, testing out the bullet solver. I am running into some issues with using a RBD Glue object with bullet. Seems like bullet does not play well with the Glue object. I don't get anywhere near the results I expect. Either all the pieces come apart with little or no force, or almost nothing seems to break, like the impacts are not being propagated correctly.

The test case I am using is very simple. Pre-fractured default sphere moved above the ground plane and dropped onto a simple floor. RBD solver reacts appropriately…

Is this a limitation with bullet or are there settings I should be adjusting? Please advise.

Thanks!
Adam

Your post may be related to my post…
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=25221 [sidefx.com]
I also want more information!

Thanks for responding. I checked out your post. I have seen issues with concave geometry and bullet. Not the problem here. Tried already to increase substepping, but that did not fix anything. Still wondering about this… Can anyone confirm that this is a limitation, or that I am doing something wrong?

I am having the same problem. Bullet behaving weird with glue. This post seems to tackle the problem, by editing the bullet solver plugin: http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=25486&sid=3a56ab5c42932135a65e8bd03e457154 [sidefx.com]

I hope this will be fixed in a future build!