private boolean checkBlocked(final OffsetPoint n, final OffsetPoint b) {
final int x = n.getX();
final int y = n.getY();
final int dx = n.getX() - b.getX();
final int dy = n.getY() - b.getY();
int flag = map.get(toTile(n));
if (dx == 0) {
if (dy == 0) {
return false;
}
int f = Y_WALL[(dy + 1) / 2];
return (flag & f) != f;
} else if (dy == 0) {
int f = X_WALL[(dx + 1) / 2];
return (flag & f) != f;
} else {
// Both directions
final int diagNum = (dy + 1) | ((dx + 1) / 2);
if ((flag & DIAG_WALL[diagNum]) == 0) {
return true;
}
if ((!walkable(n.derive(-dx, 0)) || (map.get(toTile(x - dx, y)) & DIAG_X[diagNum]) == 0)
&& (!walkable(n.derive(0, -dy)) || (map.get(toTile(x, y - dy)) & DIAG_Y[diagNum]) == 0)) {
return true;
}
}
return false;
}
public Node(final Node prev, final OffsetPoint loc) {
this(prev, loc.getX(), loc.getY());
}
private Tile toTile(OffsetPoint p) {
return toTile(p.getX(), p.getY());
}