To clean up the cave further and reduce the number of disconnected caves, the loop is run for four more iterations, except this time a tile T becomes a wall if 5 or more of the tiles within one step of T are walls, and becomes a wall if none of the tiles within two step of T are walls.ĭo note that although the second iteration lowers the possibility of disjointed caves, it may still happen.īased on the method described by Mike Anderson, this is another fairly simple algorithm, and one that most resemble how an actual dungeon is built. Repeat that three times, and the user gets a somewhat natural-looking cave.
So, it first fills the grid randomly with walls and empty cells, then goes over each grid cell and applies the following rules to the cell: So, if R1Cutoff=4 and R2Cutoff=5, that will happen almost all of the time.Īnyways, the function I eventually chose as the 'best' answer was Tile T will be filled if the number of tiles within one step of T, including T itself, is at least R1Cutoff OR the number of tiles within TWO steps of T, including T itself, is at MOST R2Cutoff. Tile T will be filled if the number of tiles within one step of T, including T itself, is at least 5.īut this is not the function which my sample program uses. T is not yet filled *and* at least 5 of its neighbors are filled
T is already filled *and* at least 4 of its neighbors are filled This algorithm is a slightly modified version of that logic: Usually cellular automation uses the 4-5 rule: a tile becomes a wall if it was a wall and 4 or more of its nine neighbors were walls, or if it was not a wall and 5 or more neighbors were. pcg-algorithm:dungeon-generationīased on the cellular automata method by Jim Babcock, this algorithm uses cellular automaton to create natural-looking caves. The A* algorithm uses the Manhattan method to calculate its heuristics, and a Binary Heap is used to store the nodes. If there are any openings left unconnected, randomly tunnel corridors out from the opening by calling tunnelRandom(), if the corridor reaches a room wall, add a door there.ĭifferent types of dungeons can be generated based on minimum and maximum room size and the number of rooms.Weights are used so that the corridors are more likely to be straight and join each other. In basicAStar(), A* pathfinding is used to look for the optimal path from one door to another. After all rooms are initialized, call initCorridors() to connect the openings in each room.If blocked, delete the room and repeat step 2. Check if the room is outside of the grid or blocked by another room or corridor through blockRoom().A random number of openings (doors) are placed on the room's walls. Calls initRooms() to create a room of random width and height at a random location on the grid.Determine the number of rooms to be created based on the room layout selected, and updates various user-configured variables in updateParam().If given the chance, random tunnels can also be dug out to give the dungeon a more natural feel.
This method places rooms randomly on the grid, then loops over each room and attempts to connect them. One of the most simple and probably the most used dungeon algorithm.
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