The problem is how can i do it, i've created newton bodies for each part, but when collide with sth, they fall apart..

And it's impossible to create one nowton body for whole tank, the upper part can rotate...you know... it's not a static model...
I use irrlicht for rendering, it can treat the upper part as the child node of the main body, I wonder if newton dynamics have similiar feature...
BTW, I dont know how to create a car controler...it's a little difference from the example: player controler: i wish my tank could accelerate gradually to the max speed when player push the key. Does anyone have solution?thx