Need to append for your question. Yesterday I tried native tools of Houdini 12 and it was look good. Constrain network tool is very similar to an my graph of connectivity (but I constructed this graph with help of Bullet collision test functions).
There is small trouble with lost impulse after breaking a piece to 2 piece - then each of small pieces lost their speed but I slove this moment with DOP trick.
I think it is possible to use native Houdini 12 tools as good destruction engine!
Edited by almatea, 09 April 2012 - 11:58 PM.