/**
* Returns the Direction represented by the given letter.
*
* @param theLetter The letter.
* @return the Direction represented by the given letter, or CENTER if no Direction is represented
* by the given letter.
*/
public static Direction valueOf(final char theLetter) {
Direction result = CENTER;
for (final Direction direction : Direction.values()) {
if (direction.letter() == theLetter) {
result = direction;
break;
}
}
return result;
}
public void moveBack() throws IllegalMove {
try {
Point newHead = moves.remove(moves.size() - 1);
Direction dir = Direction.getDirection(headX, headY, newHead.x, newHead.y);
resetConnection(headX, headY, dir);
resetConnection(newHead.x, newHead.y, dir.opposite());
headX = newHead.x;
headY = newHead.y;
gameOver = false;
} catch (Exception e) {
e.printStackTrace();
throw new IllegalMove();
}
}
/**
* Gets the directed waypoint NodeStatus associated with a particular direction.
*
* @param d the d
* @return the directed waypoint
*/
public static final NodeStatus getDirectedWaypoint(Direction d) {
return NodeStatus.valueOf("WAYPOINT_" + d.getAbbreviation());
}
/**
* Unmark a connection from point (x, y)
*
* @param x x coordinate
* @param y y coordinate
* @param dir direction from the point
* @return true if the operation was successful
*/
protected boolean resetConnection(int x, int y, Direction dir) {
if (!isInBounds(x, y)) return false;
field[getX(x)][getY(y)] &= ((1 << 8) - 1) - (1 << dir.ordinal());
return true;
}