Hello!
i'm working on my personal project, i trying recreate "ice hummocks" which move through objects and collide.
Based on this wiki page i recreate basic formula where p = 1000, g = 9.8, V (volume of the pieces)
But problem is that i working with packed objects and don't know "area of the party of an object.". and pieces start spinning after a while.
(i think it could be solved through dot product, but i stuck)
scene file!! https://drive.google.com/open?id=0B6Rw9sQd7tjLTHNfYTNTRE1NMFE
reference