First let me say that I am very new to jME and jMEPhysics/ODE, but I am an experienced programmer of C/C++/Java/Perl/Ruby, etc…
I was recently trying to impart a force on an object in the same way a spaceship's rear engine would. That is the force is always given in the same direction as the facing of the craft. When I created the object the Y axis pointed out the nose of the craft so the local Y axis is the facing. However, once the craft has been rotated I didn't see any easy way to get the local y axis. I ended up using something like this:
Vector3f localYAxis = new Vector3f (0.0f, 1.0f, 0.0f);
Quaternion orientation = obj.getLocalRotation();
obj.addForce( localYAxis );
Is that the best way to do it? I kind of expected there to be some method like this:
Vector3f localYAxis = obj.getLocalAxis(Y_AXIS); // No such method
which would return a unit vector facing along the local Y. Is there no such method?
Now that I think about it, the existence of such methods might be more of a general jme question than a jmephysics question...