I'm using bullet engine as my physical engine in my game. After solving many problems gathering a lot of information (even from GD.NET) I have another problem. I want to "weld" two rigid bodies. For example My model is a bed. It consists of the wooden frame and the mattress. But I want to handle it as one DYNAMIC object with different properties like friction of wooden parts and the mattress and different collision object for them. The above example might not be the best, but I want to do something like that.
Thanks in advance!