-#if 0
- v4f qresy, qresx, qresidual;
- m3x3f mtx_residual;
- q_axis_angle( qresy, player->rb.to_world[1], s->state.steery_s*substep );
- q_axis_angle( qresx, player->rb.to_world[0], s->state.steerx_s*substep );
-
- q_mul( qresy, qresx, qresidual );
- q_normalize( qresidual );
- q_mul( dest->root_q, qresidual, dest->root_q );
- q_normalize( dest->root_q );
-#endif