RogueBasin
Menu (Edit):
C++ Example of Dungeon-Building Algorithm
Version 1
(Translated to C++ by MindControlDx)
#include <iostream>
#include <string>
#include <cstdlib>
#include <cstdio>
#include <ctime>
class Dungeon
{
int xmax;
int ymax;
int xsize;
int ysize;
int objects;
int chanceRoom;
int chanceCorridor;
int* dungeon_map;
long oldseed;
enum
{
tileUnused = 0,
tileDirtWall,
tileDirtFloor,
tileStoneWall,
tileCorridor,
tileDoor,
tileUpStairs,
tileDownStairs,
tileChest
};
std::string msgXSize;
std::string msgYSize;
std::string msgMaxObjects;
std::string msgNumObjects;
std::string msgHelp;
std::string msgDetailedHelp;
void setCell(int x, int y, int celltype)
{
dungeon_map[x + xsize * y] = celltype;
}
int getCell(int x, int y)
{
return dungeon_map[x + xsize * y];
}
int getRand(int min, int max)
{
time_t seed;
seed = time(NULL) + oldseed;
oldseed = seed;
srand(seed);
int n = max - min + 1;
int i = rand() % n;
if(i < 0)
i = -i;
return min + i;
}
bool makeCorridor(int x, int y, int lenght, int direction)
{
int len = getRand(2, lenght);
int floor = tileCorridor;
int dir = 0;
if(direction > 0 && direction < 4) dir = direction;
int xtemp = 0;
int ytemp = 0;
switch(dir)
{
case 0:
{
if(x < 0 || x > xsize) return false;
else xtemp = x;
for(ytemp = y; ytemp > (y-len); ytemp--)
{
if(ytemp < 0 || ytemp > ysize) return false;
if(getCell(xtemp, ytemp) != tileUnused) return false;
}
for(ytemp = y; ytemp > (y - len); ytemp--)
{
setCell(xtemp, ytemp, floor);
}
break;
}
case 1:
{
if(y < 0 || y > ysize) return false;
else ytemp = y;
for(xtemp = x; xtemp < (x + len); xtemp++)
{
if(xtemp < 0 || xtemp > xsize) return false;
if(getCell(xtemp, ytemp) != tileUnused) return false;
}
for(xtemp = x; xtemp < (x + len); xtemp++)
{
setCell(xtemp, ytemp, floor);
}
break;
}
case 2:
{
if(x < 0 || x > xsize) return false;
else xtemp = x;
for(ytemp = y; ytemp < (y + len); ytemp++)
{
if(ytemp < 0 || ytemp > ysize) return false;
if(getCell(xtemp, ytemp) != tileUnused) return false;
}
for (ytemp = y; ytemp < (y+len); ytemp++){
setCell(xtemp, ytemp, floor);
}
break;
}
case 3:
{
if (ytemp < 0 || ytemp > ysize) return false;
else ytemp = y;
for (xtemp = x; xtemp > (x-len); xtemp--){
if (xtemp < 0 || xtemp > xsize) return false;
if (getCell(xtemp, ytemp) != tileUnused) return false;
}
for (xtemp = x; xtemp > (x-len); xtemp--){
setCell(xtemp, ytemp, floor);
}
break;
}
}
//woot, we're still here! let's tell the other guys we're done!!
return true;
}
bool makeRoom(int x, int y, int xlength, int ylength, int direction){
//define the dimensions of the room, it should be at least 4x4 tiles (2x2 for walking on, the rest is walls)
int xlen = getRand(4, xlength);
int ylen = getRand(4, ylength);
//the tile type it's going to be filled with
int floor = tileDirtFloor; //jordgolv..
int wall = tileDirtWall; //jordv????gg
//choose the way it's pointing at
int dir = 0;
if (direction > 0 && direction < 4) dir = direction;
switch(dir){
case 0:
//north
//Check if there's enough space left for it
for (int ytemp = y; ytemp > (y-ylen); ytemp--){
if (ytemp < 0 || ytemp > ysize) return false;
for (int xtemp = (x-xlen/2); xtemp < (x+(xlen+1)/2); xtemp++){
if (xtemp < 0 || xtemp > xsize) return false;
if (getCell(xtemp, ytemp) != tileUnused) return false; //no space left...
}
}
//we're still here, build
for (int ytemp = y; ytemp > (y-ylen); ytemp--){
for (int xtemp = (x-xlen/2); xtemp < (x+(xlen+1)/2); xtemp++){
//start with the walls
if (xtemp == (x-xlen/2)) setCell(xtemp, ytemp, wall);
else if (xtemp == (x+(xlen-1)/2)) setCell(xtemp, ytemp, wall);
else if (ytemp == y) setCell(xtemp, ytemp, wall);
else if (ytemp == (y-ylen+1)) setCell(xtemp, ytemp, wall);
//and then fill with the floor
else setCell(xtemp, ytemp, floor);
}
}
break;
case 1:
//east
for (int ytemp = (y-ylen/2); ytemp < (y+(ylen+1)/2); ytemp++){
if (ytemp < 0 || ytemp > ysize) return false;
for (int xtemp = x; xtemp < (x+xlen); xtemp++){
if (xtemp < 0 || xtemp > xsize) return false;
if (getCell(xtemp, ytemp) != tileUnused) return false;
}
}
for (int ytemp = (y-ylen/2); ytemp < (y+(ylen+1)/2); ytemp++){
for (int xtemp = x; xtemp < (x+xlen); xtemp++){
if (xtemp == x) setCell(xtemp, ytemp, wall);
else if (xtemp == (x+xlen-1)) setCell(xtemp, ytemp, wall);
else if (ytemp == (y-ylen/2)) setCell(xtemp, ytemp, wall);
else if (ytemp == (y+(ylen-1)/2)) setCell(xtemp, ytemp, wall);
else setCell(xtemp, ytemp, floor);
}
}
break;
case 2:
//south
for (int ytemp = y; ytemp < (y+ylen); ytemp++){
if (ytemp < 0 || ytemp > ysize) return false;
for (int xtemp = (x-xlen/2); xtemp < (x+(xlen+1)/2); xtemp++){
if (xtemp < 0 || xtemp > xsize) return false;
if (getCell(xtemp, ytemp) != tileUnused) return false;
}
}
for (int ytemp = y; ytemp < (y+ylen); ytemp++){
for (int xtemp = (x-xlen/2); xtemp < (x+(xlen+1)/2); xtemp++){
if (xtemp == (x-xlen/2)) setCell(xtemp, ytemp, wall);
else if (xtemp == (x+(xlen-1)/2)) setCell(xtemp, ytemp, wall);
else if (ytemp == y) setCell(xtemp, ytemp, wall);
else if (ytemp == (y+ylen-1)) setCell(xtemp, ytemp, wall);
else setCell(xtemp, ytemp, floor);
}
}
break;
case 3:
//west
for (int ytemp = (y-ylen/2); ytemp < (y+(ylen+1)/2); ytemp++){
if (ytemp < 0 || ytemp > ysize) return false;
for (int xtemp = x; xtemp > (x-xlen); xtemp--){
if (xtemp < 0 || xtemp > xsize) return false;
if (getCell(xtemp, ytemp) != tileUnused) return false;
}
}
for (int ytemp = (y-ylen/2); ytemp < (y+(ylen+1)/2); ytemp++){
for (int xtemp = x; xtemp > (x-xlen); xtemp--){
if (xtemp == x) setCell(xtemp, ytemp, wall);
else if (xtemp == (x-xlen+1)) setCell(xtemp, ytemp, wall);
else if (ytemp == (y-ylen/2)) setCell(xtemp, ytemp, wall);
else if (ytemp == (y+(ylen-1)/2)) setCell(xtemp, ytemp, wall);
else setCell(xtemp, ytemp, floor);
}
}
break;
}
//yay, all done
return true;
}
void showDungeon(){
for (int y = 0; y < ysize; y++){
for (int x = 0; x < xsize; x++){
//System.out.print(getCell(x, y));
switch(getCell(x, y)){
case tileUnused:
printf(" ");
break;
case tileDirtWall:
printf("#");
break;
case tileDirtFloor:
printf(".");
break;
case tileStoneWall:
printf("X");
break;
case tileCorridor:
printf(".");
break;
case tileDoor:
printf("+");
break;
case tileUpStairs:
printf("<");
break;
case tileDownStairs:
printf(">");
break;
case tileChest:
printf("*");
break;
};
}
//if (xsize <= xmax) printf("\n");
}
}
bool createDungeon(int inx, int iny, int inobj){
if (inobj < 1) objects = 10;
else objects = inobj;
//justera kartans storlek, om den ????r st????rre eller mindre ????n "gr????nserna"
//adjust the size of the map, if it's smaller or bigger than the limits
if (inx < 3) xsize = 3;
else if (inx > xmax) xsize = xmax;
else xsize = inx;
if (iny < 3) ysize = 3;
else if (iny > ymax) ysize = ymax;
else ysize = iny;
//printf("%s %d\n", msgXSize.c_str(), xsize);
//printf("%s %d\n", msgYSize.c_str(), + ysize);
//printf("%s %d\n", msgMaxObjects.c_str(), objects);
//redefine the map var, so it's adjusted to our new map size
dungeon_map = new int[xsize * ysize];
//start with making the "standard stuff" on the map
for (int y = 0; y < ysize; y++){
for (int x = 0; x < xsize; x++){
//ie, making the borders of unwalkable walls
if (y == 0) setCell(x, y, tileStoneWall);
else if (y == ysize-1) setCell(x, y, tileStoneWall);
else if (x == 0) setCell(x, y, tileStoneWall);
else if (x == xsize-1) setCell(x, y, tileStoneWall);
//and fill the rest with dirt
else setCell(x, y, tileUnused);
}
}
/*******************************************************************************
And now the code of the random-map-generation-algorithm begins!
*******************************************************************************/
//start with making a room in the middle, which we can start building upon
makeRoom(xsize/2, ysize/2, 8, 6, getRand(0,3)); //getrand saken f????r att slumpa fram riktning p?? rummet
//keep count of the number of "objects" we've made
int currentFeatures = 1; //+1 for the first room we just made
//then we sart the main loop
for (int countingTries = 0; countingTries < 1000; countingTries++){
//check if we've reached our quota
if (currentFeatures == objects){
break;
}
//start with a random wall
int newx = 0;
int xmod = 0;
int newy = 0;
int ymod = 0;
int validTile = -1;
//1000 chances to find a suitable object (room or corridor)..
//(yea, i know it's kinda ugly with a for-loop... -_-')
for (int testing = 0; testing < 1000; testing++){
newx = getRand(1, xsize-1);
newy = getRand(1, ysize-1);
validTile = -1;
//System.out.println("tempx: " + newx + "\ttempy: " + newy);
if (getCell(newx, newy) == tileDirtWall || getCell(newx, newy) == tileCorridor){
//check if we can reach the place
if (getCell(newx, newy+1) == tileDirtFloor || getCell(newx, newy+1) == tileCorridor){
validTile = 0; //
xmod = 0;
ymod = -1;
}
else if (getCell(newx-1, newy) == tileDirtFloor || getCell(newx-1, newy) == tileCorridor){
validTile = 1; //
xmod = +1;
ymod = 0;
}
else if (getCell(newx, newy-1) == tileDirtFloor || getCell(newx, newy-1) == tileCorridor){
validTile = 2; //
xmod = 0;
ymod = +1;
}
else if (getCell(newx+1, newy) == tileDirtFloor || getCell(newx+1, newy) == tileCorridor){
validTile = 3; //
xmod = -1;
ymod = 0;
}
//check that we haven't got another door nearby, so we won't get alot of openings besides
//each other
if (validTile > -1){
if (getCell(newx, newy+1) == tileDoor) //north
validTile = -1;
else if (getCell(newx-1, newy) == tileDoor)//east
validTile = -1;
else if (getCell(newx, newy-1) == tileDoor)//south
validTile = -1;
else if (getCell(newx+1, newy) == tileDoor)//west
validTile = -1;
}
//if we can, jump out of the loop and continue with the rest
if (validTile > -1) break;
}
}
if (validTile > -1){
//choose what to build now at our newly found place, and at what direction
int feature = getRand(0, 100);
if (feature <= chanceRoom){ //a new room
if (makeRoom((newx+xmod), (newy+ymod), 8, 6, validTile)){
currentFeatures++; //add to our quota
//then we mark the wall opening with a door
setCell(newx, newy, tileDoor);
//clean up infront of the door so we can reach it
setCell((newx+xmod), (newy+ymod), tileDirtFloor);
}
}
else if (feature >= chanceRoom){ //new corridor
if (makeCorridor((newx+xmod), (newy+ymod), 6, validTile)){
//same thing here, add to the quota and a door
currentFeatures++;
setCell(newx, newy, tileDoor);
}
}
}
}
/*******************************************************************************
All done with the building, let's finish this one off
*******************************************************************************/
//sprinkle out the bonusstuff (stairs, chests etc.) over the map
int newx = 0;
int newy = 0;
int ways = 0; //from how many directions we can reach the random spot from
int state = 0; //the state the loop is in, start with the stairs
while (state != 10){
for (int testing = 0; testing < 1000; testing++){
newx = getRand(1, xsize-1);
newy = getRand(1, ysize-2); //cheap bugfix, pulls down newy to 0<y<24, from 0<y<25
//System.out.println("x: " + newx + "\ty: " + newy);
ways = 4; //the lower the better
//check if we can reach the spot
if (getCell(newx, newy+1) == tileDirtFloor || getCell(newx, newy+1) == tileCorridor){
//north
if (getCell(newx, newy+1) != tileDoor)
ways--;
}
if (getCell(newx-1, newy) == tileDirtFloor || getCell(newx-1, newy) == tileCorridor){
//east
if (getCell(newx-1, newy) != tileDoor)
ways--;
}
if (getCell(newx, newy-1) == tileDirtFloor || getCell(newx, newy-1) == tileCorridor){
//south
if (getCell(newx, newy-1) != tileDoor)
ways--;
}
if (getCell(newx+1, newy) == tileDirtFloor || getCell(newx+1, newy) == tileCorridor){
//west
if (getCell(newx+1, newy) != tileDoor)
ways--;
}
if (state == 0){
if (ways == 0){
//we're in state 0, let's place a "upstairs" thing
setCell(newx, newy, tileUpStairs);
state = 1;
break;
}
}
else if (state == 1){
if (ways == 0){
//state 1, place a "downstairs"
setCell(newx, newy, tileDownStairs);
state = 10;
break;
}
}
}
}
//all done with the map generation, tell the user about it and finish
//printf("%s %d\n",msgNumObjects.c_str(), currentFeatures);
return true;
}
void cmain()
{
int x = 80;
int y = 25;
int dungeon_objects = 100;
dungeon_map = new int[x * y];
for(;;)
{
if(createDungeon(x, y, dungeon_objects))
showDungeon();
std::cin.get();
}
}
public:
Dungeon()
{
xmax = 80;
ymax = 25;
xsize = 0;
ysize = 0;
objects = 0;
chanceRoom = 75;
chanceCorridor = 25;
msgXSize = "X size of dungeon: \t";
msgYSize = "Y size of dungeon: \t";
msgMaxObjects = "max # of objects: \t";
msgNumObjects = "# of objects made: \t";
msgHelp = "";
msgDetailedHelp = "";
cmain();
}
};
int main()
{
Dungeon d;
return EXIT_SUCCESS;
}
Version 2
Cleaned up and modernised a little by netherh.
(Use C++11 random number generator. Common functionality abstracted. Simple Map class added.)
#include <iostream>
#include <string>
#include <random>
#include <cassert>
enum class Tile
{
Unused,
DirtWall,
DirtFloor,
Corridor,
Door,
UpStairs,
DownStairs
};
enum class Direction
{
North, South, East, West,
};
class Map
{
public:
Map():
xSize(0), ySize(0),
data() { }
Map(int x, int y, Tile value = Tile::Unused):
xSize(x), ySize(y),
data(x * y, value) { }
void SetCell(int x, int y, Tile celltype)
{
assert(IsXInBounds(x));
assert(IsYInBounds(y));
data[x + xSize * y] = celltype;
}
Tile GetCell(int x, int y) const
{
assert(IsXInBounds(x));
assert(IsYInBounds(y));
return data[x + xSize * y];
}
void SetCells(int xStart, int yStart, int xEnd, int yEnd, Tile cellType)
{
assert(IsXInBounds(xStart) && IsXInBounds(xEnd));
assert(IsYInBounds(yStart) && IsYInBounds(yEnd));
assert(xStart <= xEnd);
assert(yStart <= yEnd);
for (auto y = yStart; y != yEnd + 1; ++y)
for (auto x = xStart; x != xEnd + 1; ++x)
SetCell(x, y, cellType);
}
bool IsXInBounds(int x) const
{
return x >= 0 && x < xSize;
}
bool IsYInBounds(int y) const
{
return y >= 0 && y < ySize;
}
bool IsAreaUnused(int xStart, int yStart, int xEnd, int yEnd)
{
assert(IsXInBounds(xStart) && IsXInBounds(xEnd));
assert(IsYInBounds(yStart) && IsYInBounds(yEnd));
assert(xStart <= xEnd);
assert(yStart <= yEnd);
for (auto y = yStart; y != yEnd + 1; ++y)
for (auto x = xStart; x != xEnd + 1; ++x)
if (GetCell(x, y) != Tile::Unused)
return false;
return true;
}
bool IsAdjacent(int x, int y, Tile tile)
{
assert(IsXInBounds(x - 1) && IsXInBounds(x + 1));
assert(IsYInBounds(y - 1) && IsYInBounds(y + 1));
return
GetCell(x - 1, y) == tile || GetCell(x + 1, y) == tile ||
GetCell(x, y - 1) == tile || GetCell(x, y + 1) == tile;
}
void Print() const
{
// TODO: proper ostream iterator.
// TODO: proper lookup of character from enum.
for (auto y = 0; y != ySize; y++)
{
for (auto x = 0; x != xSize; x++)
{
switch(GetCell(x, y))
{
case Tile::Unused:
std::cout << " ";
break;
case Tile::DirtWall:
std::cout << "#";
break;
case Tile::DirtFloor:
std::cout << ".";
break;
case Tile::Corridor:
std::cout << ".";
break;
case Tile::Door:
std::cout << "+";
break;
case Tile::UpStairs:
std::cout << "<";
break;
case Tile::DownStairs:
std::cout << ">";
break;
};
}
std::cout << std::endl;
}
std::cout << std::endl;
}
private:
int xSize, ySize;
std::vector<Tile> data;
};
class DungeonGenerator
{
public:
int Seed;
int XSize, YSize;
int MaxFeatures;
int ChanceRoom, ChanceCorridor;
DungeonGenerator():
Seed(std::random_device()()),
XSize(80), YSize(25),
MaxFeatures(100),
ChanceRoom(75), ChanceCorridor(25) { }
Map Generate()
{
// TODO: proper input validation.
assert(MaxFeatures > 0 && MaxFeatures <= 100);
assert(XSize > 3 && XSize <= 80);
assert(YSize > 3 && YSize <= 25);
auto rng = RngT(Seed);
auto map = Map(XSize, YSize, Tile::Unused);
MakeDungeon(map, rng);
return map;
}
private:
typedef std::mt19937 RngT;
int GetRandomInt(RngT& rng, int min, int max) const
{
return std::uniform_int_distribution<int>(min, max)(rng);
}
Direction GetRandomDirection(RngT& rng) const
{
return Direction(std::uniform_int_distribution<int>(0, 3)(rng));
}
bool MakeCorridor(Map& map, RngT& rng, int x, int y, int maxLength, Direction direction) const
{
assert(x >= 0 && x < XSize);
assert(y >= 0 && y < YSize);
assert(maxLength > 0 && maxLength <= std::max(XSize, YSize));
auto length = GetRandomInt(rng, 2, maxLength);
auto xStart = x;
auto yStart = y;
auto xEnd = x;
auto yEnd = y;
if (direction == Direction::North)
yStart = y - length;
else if (direction == Direction::East)
xEnd = x + length;
else if (direction == Direction::South)
yEnd = y + length;
else if (direction == Direction::West)
xStart = x - length;
if (!map.IsXInBounds(xStart) || !map.IsXInBounds(xEnd) || !map.IsYInBounds(yStart) || !map.IsYInBounds(yEnd))
return false;
if (!map.IsAreaUnused(xStart, yStart, xEnd, yEnd))
return false;
map.SetCells(xStart, yStart, xEnd, yEnd, Tile::Corridor);
//std::cout << "Corridor: ( " << xStart << ", " << yStart << " ) to ( " << xEnd << ", " << yEnd << " )" << std::endl;
return true;
}
bool MakeRoom(Map& map, RngT& rng, int x, int y, int xMaxLength, int yMaxLength, Direction direction) const
{
// Minimum room size of 4x4 tiles (2x2 for walking on, the rest is walls)
auto xLength = GetRandomInt(rng, 4, xMaxLength);
auto yLength = GetRandomInt(rng, 4, yMaxLength);
auto xStart = x;
auto yStart = y;
auto xEnd = x;
auto yEnd = y;
if (direction == Direction::North)
{
yStart = y - yLength;
xStart = x - xLength / 2;
xEnd = x + (xLength + 1) / 2;
}
else if (direction == Direction::East)
{
yStart = y - yLength / 2;
yEnd = y + (yLength + 1) / 2;
xEnd = x + xLength;
}
else if (direction == Direction::South)
{
yEnd = y + yLength;
xStart = x - xLength / 2;
xEnd = x + (xLength + 1) / 2;
}
else if (direction == Direction::West)
{
yStart = y - yLength / 2;
yEnd = y + (yLength + 1) / 2;
xStart = x - xLength;
}
if (!map.IsXInBounds(xStart) || !map.IsXInBounds(xEnd) || !map.IsYInBounds(yStart) || !map.IsYInBounds(yEnd))
return false;
if (!map.IsAreaUnused(xStart, yStart, xEnd, yEnd))
return false;
map.SetCells(xStart, yStart, xEnd, yEnd, Tile::DirtWall);
map.SetCells(xStart + 1, yStart + 1, xEnd - 1, yEnd - 1, Tile::DirtFloor);
//std::cout << "Room: ( " << xStart << ", " << yStart << " ) to ( " << xEnd << ", " << yEnd << " )" << std::endl;
return true;
}
bool MakeFeature(Map& map, RngT& rng, int x, int y, int xmod, int ymod, Direction direction) const
{
// Choose what to build
auto chance = GetRandomInt(rng, 0, 100);
if (chance <= ChanceRoom)
{
if (MakeRoom(map, rng, x + xmod, y + ymod, 8, 6, direction))
{
map.SetCell(x, y, Tile::Door);
// Remove wall next to the door.
map.SetCell(x + xmod, y + ymod, Tile::DirtFloor);
return true;
}
return false;
}
else
{
if (MakeCorridor(map, rng, x + xmod, y + ymod, 6, direction))
{
map.SetCell(x, y, Tile::Door);
return true;
}
return false;
}
}
bool MakeFeature(Map& map, RngT& rng) const
{
auto tries = 0;
auto maxTries = 1000;
for( ; tries != maxTries; ++tries)
{
// Pick a random wall or corridor tile.
// Make sure it has no adjacent doors (looks weird to have doors next to each other).
// Find a direction from which it's reachable.
// Attempt to make a feature (room or corridor) starting at this point.
int x = GetRandomInt(rng, 1, XSize - 2);
int y = GetRandomInt(rng, 1, YSize - 2);
if (map.GetCell(x, y) != Tile::DirtWall && map.GetCell(x, y) != Tile::Corridor)
continue;
if (map.IsAdjacent(x, y, Tile::Door))
continue;
if (map.GetCell(x, y+1) == Tile::DirtFloor || map.GetCell(x, y+1) == Tile::Corridor)
{
if (MakeFeature(map, rng, x, y, 0, -1, Direction::North))
return true;
}
else if (map.GetCell(x-1, y) == Tile::DirtFloor || map.GetCell(x-1, y) == Tile::Corridor)
{
if (MakeFeature(map, rng, x, y, 1, 0, Direction::East))
return true;
}
else if (map.GetCell(x, y-1) == Tile::DirtFloor || map.GetCell(x, y-1) == Tile::Corridor)
{
if (MakeFeature(map, rng, x, y, 0, 1, Direction::South))
return true;
}
else if (map.GetCell(x+1, y) == Tile::DirtFloor || map.GetCell(x+1, y) == Tile::Corridor)
{
if (MakeFeature(map, rng, x, y, -1, 0, Direction::West))
return true;
}
}
return false;
}
bool MakeStairs(Map& map, RngT& rng, Tile tile) const
{
auto tries = 0;
auto maxTries = 10000;
for ( ; tries != maxTries; ++tries)
{
int x = GetRandomInt(rng, 1, XSize - 2);
int y = GetRandomInt(rng, 1, YSize - 2);
if (!map.IsAdjacent(x, y, Tile::DirtFloor) && !map.IsAdjacent(x, y, Tile::Corridor))
continue;
if (map.IsAdjacent(x, y, Tile::Door))
continue;
map.SetCell(x, y, tile);
return true;
}
return false;
}
bool MakeDungeon(Map& map, RngT& rng) const
{
// Make one room in the middle to start things off.
MakeRoom(map, rng, XSize / 2, YSize / 2, 8, 6, GetRandomDirection(rng));
for (auto features = 1; features != MaxFeatures; ++features)
{
if (!MakeFeature(map, rng))
{
std::cout << "Unable to place more features (placed " << features << ")." << std::endl;
break;
}
}
if (!MakeStairs(map, rng, Tile::UpStairs))
std::cout << "Unable to place up stairs." << std::endl;
if (!MakeStairs(map, rng, Tile::DownStairs))
std::cout << "Unable to place down stairs." << std::endl;
return true;
}
};
int main()
{
DungeonGenerator generator;
auto map = generator.Generate();
map.Print();
}
Version 3
Improved algorithm and cleaned up some code by underww
(This is derived from Version 2)
#include <random>
#include <vector>
#include <iostream>
namespace
{
std::random_device rd;
std::mt19937 mt(rd());
int randomInt(int exclusiveMax)
{
std::uniform_int_distribution<> dist(0, exclusiveMax - 1);
return dist(mt);
}
int randomInt(int min, int max) // inclusive min/max
{
std::uniform_int_distribution<> dist(0, max - min);
return dist(mt) + min;
}
bool randomBool(double probability = 0.5)
{
std::bernoulli_distribution dist(probability);
return dist(mt);
}
}
struct Rect
{
int x, y;
int width, height;
};
class Dungeon
{
public:
enum Tile
{
Unused = ' ',
Floor = '.',
Corridor = ',',
Wall = '#',
ClosedDoor = '+',
OpenDoor = '-',
UpStairs = '<',
DownStairs = '>'
};
enum Direction
{
North,
South,
West,
East,
DirectionCount
};
public:
Dungeon(int width, int height)
: _width(width)
, _height(height)
, _tiles(width * height, Unused)
, _rooms()
, _exits()
{
}
void generate(int maxFeatures)
{
// place the first room in the center
if (!makeRoom(_width / 2, _height / 2, static_cast<Direction>(randomInt(4), true)))
{
std::cout << "Unable to place the first room.\n";
return;
}
// we already placed 1 feature (the first room)
for (int i = 1; i < maxFeatures; ++i)
{
if (!createFeature())
{
std::cout << "Unable to place more features (placed " << i << ").\n";
break;
}
}
if (!placeObject(UpStairs))
{
std::cout << "Unable to place up stairs.\n";
return;
}
if (!placeObject(DownStairs))
{
std::cout << "Unable to place down stairs.\n";
return;
}
for (char& tile : _tiles)
{
if (tile == Unused)
tile = '.';
else if (tile == Floor || tile == Corridor)
tile = ' ';
}
}
void print()
{
for (int y = 0; y < _height; ++y)
{
for (int x = 0; x < _width; ++x)
std::cout << getTile(x, y);
std::cout << std::endl;
}
}
private:
char getTile(int x, int y) const
{
if (x < 0 || y < 0 || x >= _width || y >= _height)
return Unused;
return _tiles[x + y * _width];
}
void setTile(int x, int y, char tile)
{
_tiles[x + y * _width] = tile;
}
bool createFeature()
{
for (int i = 0; i < 1000; ++i)
{
if (_exits.empty())
break;
// choose a random side of a random room or corridor
int r = randomInt(_exits.size());
int x = randomInt(_exits[r].x, _exits[r].x + _exits[r].width - 1);
int y = randomInt(_exits[r].y, _exits[r].y + _exits[r].height - 1);
// north, south, west, east
for (int j = 0; j < DirectionCount; ++j)
{
if (createFeature(x, y, static_cast<Direction>(j)))
{
_exits.erase(_exits.begin() + r);
return true;
}
}
}
return false;
}
bool createFeature(int x, int y, Direction dir)
{
static const int roomChance = 50; // corridorChance = 100 - roomChance
int dx = 0;
int dy = 0;
if (dir == North)
dy = 1;
else if (dir == South)
dy = -1;
else if (dir == West)
dx = 1;
else if (dir == East)
dx = -1;
if (getTile(x + dx, y + dy) != Floor && getTile(x + dx, y + dy) != Corridor)
return false;
if (randomInt(100) < roomChance)
{
if (makeRoom(x, y, dir))
{
setTile(x, y, ClosedDoor);
return true;
}
}
else
{
if (makeCorridor(x, y, dir))
{
if (getTile(x + dx, y + dy) == Floor)
setTile(x, y, ClosedDoor);
else // don't place a door between corridors
setTile(x, y, Corridor);
return true;
}
}
return false;
}
bool makeRoom(int x, int y, Direction dir, bool firstRoom = false)
{
static const int minRoomSize = 3;
static const int maxRoomSize = 6;
Rect room;
room.width = randomInt(minRoomSize, maxRoomSize);
room.height = randomInt(minRoomSize, maxRoomSize);
if (dir == North)
{
room.x = x - room.width / 2;
room.y = y - room.height;
}
else if (dir == South)
{
room.x = x - room.width / 2;
room.y = y + 1;
}
else if (dir == West)
{
room.x = x - room.width;
room.y = y - room.height / 2;
}
else if (dir == East)
{
room.x = x + 1;
room.y = y - room.height / 2;
}
if (placeRect(room, Floor))
{
_rooms.emplace_back(room);
if (dir != South || firstRoom) // north side
_exits.emplace_back(Rect{ room.x, room.y - 1, room.width, 1 });
if (dir != North || firstRoom) // south side
_exits.emplace_back(Rect{ room.x, room.y + room.height, room.width, 1 });
if (dir != East || firstRoom) // west side
_exits.emplace_back(Rect{ room.x - 1, room.y, 1, room.height });
if (dir != West || firstRoom) // east side
_exits.emplace_back(Rect{ room.x + room.width, room.y, 1, room.height });
return true;
}
return false;
}
bool makeCorridor(int x, int y, Direction dir)
{
static const int minCorridorLength = 3;
static const int maxCorridorLength = 6;
Rect corridor;
corridor.x = x;
corridor.y = y;
if (randomBool()) // horizontal corridor
{
corridor.width = randomInt(minCorridorLength, maxCorridorLength);
corridor.height = 1;
if (dir == North)
{
corridor.y = y - 1;
if (randomBool()) // west
corridor.x = x - corridor.width + 1;
}
else if (dir == South)
{
corridor.y = y + 1;
if (randomBool()) // west
corridor.x = x - corridor.width + 1;
}
else if (dir == West)
corridor.x = x - corridor.width;
else if (dir == East)
corridor.x = x + 1;
}
else // vertical corridor
{
corridor.width = 1;
corridor.height = randomInt(minCorridorLength, maxCorridorLength);
if (dir == North)
corridor.y = y - corridor.height;
else if (dir == South)
corridor.y = y + 1;
else if (dir == West)
{
corridor.x = x - 1;
if (randomBool()) // north
corridor.y = y - corridor.height + 1;
}
else if (dir == East)
{
corridor.x = x + 1;
if (randomBool()) // north
corridor.y = y - corridor.height + 1;
}
}
if (placeRect(corridor, Corridor))
{
if (dir != South && corridor.width != 1) // north side
_exits.emplace_back(Rect{ corridor.x, corridor.y - 1, corridor.width, 1 });
if (dir != North && corridor.width != 1) // south side
_exits.emplace_back(Rect{ corridor.x, corridor.y + corridor.height, corridor.width, 1 });
if (dir != East && corridor.height != 1) // west side
_exits.emplace_back(Rect{ corridor.x - 1, corridor.y, 1, corridor.height });
if (dir != West && corridor.height != 1) // east side
_exits.emplace_back(Rect{ corridor.x + corridor.width, corridor.y, 1, corridor.height });
return true;
}
return false;
}
bool placeRect(const Rect& rect, char tile)
{
if (rect.x < 1 || rect.y < 1 || rect.x + rect.width > _width - 1 || rect.y + rect.height > _height - 1)
return false;
for (int y = rect.y; y < rect.y + rect.height; ++y)
for (int x = rect.x; x < rect.x + rect.width; ++x)
{
if (getTile(x, y) != Unused)
return false; // the area already used
}
for (int y = rect.y - 1; y < rect.y + rect.height + 1; ++y)
for (int x = rect.x - 1; x < rect.x + rect.width + 1; ++x)
{
if (x == rect.x - 1 || y == rect.y - 1 || x == rect.x + rect.width || y == rect.y + rect.height)
setTile(x, y, Wall);
else
setTile(x, y, tile);
}
return true;
}
bool placeObject(char tile)
{
if (_rooms.empty())
return false;
int r = randomInt(_rooms.size()); // choose a random room
int x = randomInt(_rooms[r].x + 1, _rooms[r].x + _rooms[r].width - 2);
int y = randomInt(_rooms[r].y + 1, _rooms[r].y + _rooms[r].height - 2);
if (getTile(x, y) == Floor)
{
setTile(x, y, tile);
// place one object in one room (optional)
_rooms.erase(_rooms.begin() + r);
return true;
}
return false;
}
private:
int _width, _height;
std::vector<char> _tiles;
std::vector<Rect> _rooms; // rooms for place stairs or monsters
std::vector<Rect> _exits; // 4 sides of rooms or corridors
};
int main()
{
Dungeon d(79, 24);
d.generate(50);
d.print();
std::cout << "Press Enter to quit... ";
std::cin.get();
return 0;
}