gl.glLoadIdentity();
  private void recalcInverseRotation(GL gl) {    Rotf oriInv = orientation.inverse();    Vec3f tmp = new Vec3f();    float ang = orientation.get(tmp);    gl.glLoadIdentity();    if (tmp.lengthSquared() > EPSILON)      gl.glRotatef((float) Math.toDegrees(ang), tmp.x(), tmp.y(), tmp.z());  }