/**
* <code>performAction</code> rotates the camera about it's up vector or lock axis at a speed of
* movement speed * time. Where time is the time between frames and 1 corresponds to 1 second.
*
* @see com.jme.input.action.KeyInputAction#performAction(InputActionEvent)
*/
public void performAction(InputActionEvent evt) {
incr.loadIdentity();
if (lockAxis == null) {
node.getLocalRotation().getRotationColumn(1, tempVa);
tempVa.normalizeLocal();
incr.fromAngleNormalAxis(-speed * evt.getTime(), tempVa);
} else {
incr.fromAngleNormalAxis(-speed * evt.getTime(), lockAxis);
}
node.getLocalRotation()
.fromRotationMatrix(incr.mult(node.getLocalRotation().toRotationMatrix(tempMa), tempMb));
node.getLocalRotation().normalize();
}
/**
* Rotate a node by the current setting of incr matrix
*
* @param node The node to rotate
*/
private static void rotateByIncr(Spatial node) {
node.getLocalRotation()
.fromRotationMatrix(incr.mult(node.getLocalRotation().toRotationMatrix(tempMa), tempMb));
node.getLocalRotation().normalize();
}