private static TileSymmetry countBaseSymmetry(Tile tile) {
for (Feature piece : tile.getFeatures()) {
if (piece instanceof Road || piece instanceof City) {
Feature opposite = tile.getFeature(piece.getLocation().rev());
if (opposite == null || !opposite.getClass().equals(piece.getClass())) {
return TileSymmetry.NONE;
}
}
}
for (Feature piece : tile.getFeatures()) {
if (piece instanceof Road || piece instanceof City) {
Feature opposite = tile.getFeature(piece.getLocation().rotateCW(Rotation.R90));
if (opposite == null || !opposite.getClass().equals(piece.getClass())) {
return TileSymmetry.S2;
}
}
}
return TileSymmetry.S4;
}
