protected void useMovement(Unit U) {
// if movement forward is possible, move forward 1 square
// otherwise, rotate left or right
movementPoints = Movement.getMovement(map, U);
if (movementPoints[1].length == 0) {
randomRotate(U);
} else {
U.setXYCoordinate(movementPoints[1][0], map);
U.usePoints(U.getMovementCost());
}
}
