Rogue: Savage Rats, a retro-themed dungeon crawler
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rogue-savage-rats/src/mightypork/rogue/world/gen/rooms/DeadEndRoom.java

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package mightypork.rogue.world.gen.rooms;
import java.util.Random;
import mightypork.gamecore.util.math.algo.Coord;
import mightypork.rogue.world.gen.MapTheme;
import mightypork.rogue.world.gen.RoomBuilder;
import mightypork.rogue.world.gen.RoomEntry;
import mightypork.rogue.world.gen.ScratchMap;
public class DeadEndRoom implements RoomBuilder {
@Override
public RoomEntry buildRoom(ScratchMap map, MapTheme theme, Random rand, Coord center)
{
final Coord low = center.add(-1, -1);
final Coord high = center.add(1, 1);
if (!map.isClear(low, high)) return null;
map.set(center, theme.floor());
return new RoomEntry(low, high);
}
}