Hunt-and-kill algorithm rocks. It handles everything I need for map gen, including spawn points, room placement, and the maze like map.

Makefile

@@ -26,7 +26,7 @@ tracy_build:
 	meson compile -j 10 -C builddir
 
 test: build
-	./builddir/runtests "[maze-gen]"
+	./builddir/runtests "[levelmanager]"
 
 run: build test
 ifeq '$(OS)' 'Windows_NT'
@@ -49,7 +49,7 @@ clean:
 	meson compile --clean -C builddir
 
 debug_test: build
-	gdb --nx -x .gdbinit --ex run --args builddir/runtests -e "[maze-gen]"
+	gdb --nx -x .gdbinit --ex run --args builddir/runtests -e "[levelmanager]"
 
 win_installer:
 	powershell 'start "C:\Program Files (x86)\solicus\InstallForge\bin\ifbuilderenvx86.exe" scripts\win_installer.ifp'

gui/fsm.cpp

@@ -354,7 +354,7 @@ namespace gui {
       if($map_open) {
         $map_ui.render($window, $main_ui.$compass_dir);
       } else {
-        $mini_map.render($window, $main_ui.$compass_dir);
+        // $mini_map.render($window, $main_ui.$compass_dir);
       }
     }
   }

maze.cpp

@@ -18,134 +18,7 @@ inline size_t rand(size_t i, size_t j) {
 }
 
 
-inline bool split_dir(size_t iDim, size_t jDim) {
-  if(iDim < jDim) {
-    return false;
-  } else if(jDim < iDim) {
-    return true;
-  } else {
-    return Random::uniform(0, 1);
-  }
-}
-
-inline bool good_hole(Matrix &map, size_t split, size_t hole, bool horiz) {
-  if(hole % 2 == 0) return false;
-
-  size_t j = horiz ? split : hole;
-  size_t i = horiz ? hole : split;
-  if(map[j][i] == WALL_PATH_LIMIT) return false;
-
-  return true;
-}
-
-void divide(Matrix& map, std::vector<Room> &rooms,
-    Point iCoords, Point jCoords, bool horizontal) {
-  int iDim = iCoords.y - iCoords.x;
-  int jDim = jCoords.y - jCoords.x;
-  bool punch_room = false;
-
-  if(iDim <= 0 || jDim <= 0) {
-    return;
-  } else if(iDim <= 2 && jDim <= 2) {
-    fmt::println("MADE ROOM! {},{}; {},{}",
-        iCoords.x, iCoords.y, jCoords.x, jCoords.y);
-    punch_room = true;
-  }
-
-  if(horizontal) {
-    size_t split = 0;
-    do {
-      split = rand(iCoords.x, iCoords.x + iDim + 1);
-    } while(split % 2);
-
-    size_t hole = 0;
-    do {
-      hole = rand(jCoords.x, jCoords.x + jDim +1);
-    } while(good_hole(map, split, hole, horizontal));
-
-    for(size_t j = jCoords.x; j <= jCoords.y; j++) {
-      if(j != hole) {
-        map[split][j] = WALL_PATH_LIMIT;
-      }
-    }
-
-    divide(map, rooms,
-        {iCoords.x, size_t(split - 1)},
-        jCoords,
-        split_dir(split - iCoords.x - 1, jDim));
-
-    divide(map, rooms,
-        {size_t(split + 1), iCoords.y},
-        jCoords,
-        split_dir(iCoords.x - split - 1, jDim));
-  } else {
-    size_t split = 0;
-    do {
-      split = rand(jCoords.x, jCoords.x + jDim + 1);
-    } while(split % 2);
-
-    size_t hole = 0;
-    do {
-      hole = rand(iCoords.x, iCoords.x + iDim + 1);
-    } while(good_hole(map, split, hole, horizontal));
-
-    for(size_t i = iCoords.x; i <= iCoords.y; i++) {
-      if(i != hole) {
-        map[i][split] = WALL_PATH_LIMIT;
-      }
-    }
-
-    divide(map, rooms,
-        iCoords,
-        {jCoords.x, size_t(split - 1)},
-        split_dir(iDim, split - jCoords.x - 1));
-
-    divide(map, rooms,
-        iCoords,
-        {size_t(split + 1), jCoords.y},
-        Random::uniform(0, 1));
-  }
-
-  if(punch_room) {
-    // for(size_t j = jCoords.x; j <= jCoords.y; j++) {
-    //   for(size_t i = iCoords.x; i <= iCoords.y; i++) {
-    //     map[j][i] = 0;
-    //   }
-    // }
-
-    Room room{iCoords.x, jCoords.x, iCoords.y - iCoords.x + 1, jCoords.y - jCoords.x + 1};
-
-    for(auto r : rooms) {
-      if(r.x == room.x && r.y == room.y) {
-        return;
-      }
-    }
-
-    rooms.push_back(room);
-  }
-}
-
-
-void maze::recursive_div(Matrix& map, std::vector<Room>& rooms) {
-  size_t width = matrix::width(map);
-  size_t height = matrix::height(map);
-
-  for(size_t i = 0; i < height; i++) {
-    for(size_t j = 0; j < width; j++) {
-      int val = (i == 0 ||
-          j == 0 ||
-          i == height - 1 ||
-          j == width - 1);
-
-      map[i][j] = val == 1 ? WALL_PATH_LIMIT : 0;
-    }
-  }
-
-  divide(map, rooms, {1, height - 2}, {1, width - 2}, split_dir(1, 1));
-}
-
-
-bool complete(Matrix& maze) {
+inline bool complete(Matrix& maze) {
   size_t width = matrix::width(maze);
   size_t height = matrix::height(maze);
 
@@ -190,7 +63,7 @@ std::vector<Point> neighbors(Matrix& maze, Point on) {
 
   for(auto point : points) {
     if(matrix::inbounds(maze, point.x, point.y)) {
-      if(maze[point.y][point.x] == WALL_PATH_LIMIT) {
+      if(maze[point.y][point.x] == WALL_VALUE) {
         result.push_back(point);
       }
     }
@@ -199,13 +72,13 @@ std::vector<Point> neighbors(Matrix& maze, Point on) {
   return result;
 }
 
-std::pair<Point, Point> findCoord(Matrix& maze) {
+inline std::pair<Point, Point> find_coord(Matrix& maze) {
   size_t width = matrix::width(maze);
   size_t height = matrix::height(maze);
 
   for(size_t y = 1; y < height; y += 2) {
     for(size_t x = 1; x < width; x += 2) {
-      if(maze[y][x] == WALL_PATH_LIMIT) {
+      if(maze[y][x] == WALL_VALUE) {
         auto found = neighborsAB(maze, {x, y});
 
         for(auto point : found) {
@@ -221,34 +94,35 @@ std::pair<Point, Point> findCoord(Matrix& maze) {
   dbc::sentinel("failed to find coord?");
 }
 
-void maze::hunt_and_kill(Matrix& maze, std::vector<Room>& rooms) {
-  size_t width = matrix::width(maze);
-  size_t height = matrix::height(maze);
-  matrix::assign(maze, WALL_PATH_LIMIT);
+void maze::hunt_and_kill(Matrix& maze, std::vector<Room>& rooms, std::vector<Point>& dead_ends) {
+  matrix::assign(maze, WALL_VALUE);
 
-  Room start{2, 2, 3, 3};
-  rooms.push_back(start);
-  Room goal{width-4, height-4, 3, 3};
-  rooms.push_back(goal);
+  Point last_even{0,0};
 
   for(auto& room : rooms) {
-    for(matrix::box it{maze, room.x, room.y, 1}; it.next();) {
+    if(room.x % 2 == 0 && room.y % 2 == 0) {
+      last_even = {room.x, room.y};
+    }
+
+    for(matrix::box it{maze, room.x, room.y, room.width}; it.next();) {
       maze[it.y][it.x] = 0;
     }
   }
 
   Point on{1,1};
+
   while(!complete(maze)) {
     auto n = neighbors(maze, on);
     if(n.size() == 0) {
-      auto t = findCoord(maze);
+      dead_ends.push_back(on);
+      auto t = find_coord(maze);
       on = t.first;
       maze[on.y][on.x] = 0;
       size_t row = (on.y + t.second.y) / 2;
       size_t col = (on.x + t.second.x) / 2;
       maze[row][col] = 0;
     } else {
-      auto nb = n[Random::uniform(size_t(0), n.size() - 1)];
+      auto nb = n[rand(size_t(0), n.size() - 1)];
       maze[nb.y][nb.x] = 0;
 
       size_t row = (nb.y + on.y) / 2;
@@ -257,4 +131,21 @@ void maze::hunt_and_kill(Matrix& maze, std::vector<Room>& rooms) {
       on = nb;
     }
   }
+
+  for(auto at : dead_ends) {
+    for(auto& room : rooms) {
+      Point room_ul{room.x - room.width - 1, room.y - room.height - 1};
+      Point room_lr{room.x + room.width - 1, room.y + room.height - 1};
+      if(at.x >= room_ul.x && at.y >= room_ul.y &&
+          at.x <= room_lr.x && at.y <= room_lr.y)
+      {
+        for(matrix::compass it{maze, at.x, at.y}; it.next();) {
+          if(maze[it.y][it.x] == 1) {
+            maze[it.y][it.x] = 0;
+            break;
+          }
+        }
+      }
+    }
+  }
 }

maze.hpp

@@ -3,7 +3,5 @@
 #include "map.hpp"
 
 namespace maze {
-  void recursive_div(matrix::Matrix& map, std::vector<Room>& rooms);
-
-  void hunt_and_kill(Matrix& maze, std::vector<Room>& rooms);
+  void hunt_and_kill(Matrix& maze, std::vector<Room>& rooms, std::vector<Point>& dead_ends);
 }

raycaster.cpp

@@ -25,6 +25,16 @@ union ColorConv {
   uint32_t as_int;
 };
 
+inline uint32_t old_lighting(uint32_t pixel, float dist, int level) {
+  (void)level;
+  ColorConv conv{.as_int=pixel};
+  conv.as_color.r /= dist;
+  conv.as_color.g /= dist;
+  conv.as_color.b /= dist;
+
+  return conv.as_int;
+}
+
 /* It's hard to believe, but this is faster than any bitfiddling
  * I could devise.  Just use a union with a struct, do the math
  * and I guess the compiler can handle it better than shifting

tests/mazes.cpp

@@ -10,24 +10,12 @@ using std::string;
 using matrix::Matrix;
 
 
-TEST_CASE("recursive division (garbage)", "[mazes]") {
-  auto map = matrix::make(21, 21);
-  std::vector<Room> rooms;
-
-  maze::recursive_div(map, rooms);
-  matrix::dump("MAZE?", map);
-
-  for(auto& room : rooms) {
-    fmt::println("room: {},{}; {},{}",
-        room.x, room.y, room.width, room.height);
-  }
-}
-
 TEST_CASE("hunt-and-kill", "[maze-gen]") {
   auto map = matrix::make(21, 21);
   std::vector<Room> rooms;
+  std::vector<Point> dead_ends;
 
-  maze::hunt_and_kill(map, rooms);
+  maze::hunt_and_kill(map, rooms, dead_ends);
   matrix::dump("MAZE?", map);
 
   for(auto& room : rooms) {

worldbuilder.cpp

@@ -18,11 +18,6 @@ inline int make_split(Room &cur, bool horiz) {
   return Random::uniform<int>(min, max);
 }
 
-void WorldBuilder::set_door(Room &room, int value) {
-  $map.$walls[room.entry.y][room.entry.x] = value;
-  $map.$walls[room.exit.y][room.exit.x] = value;
-}
-
 void rand_side(Room &room, Point &door) {
   dbc::check(int(room.width) > 0 && int(room.height) > 0, "Weird room with 0 for height or width.");
   int rand_x = Random::uniform<int>(0, room.width - 1);
@@ -55,101 +50,22 @@ void WorldBuilder::add_door(Room &room) {
   rand_side(room, room.exit);
 }
 
-void WorldBuilder::partition_map(Room &cur, int depth) {
-  if(cur.width >= 3 && cur.width <= 6 &&
-      cur.height >= 3 && cur.height <= 6)
-  {
-    $map.add_room(cur);
-    return;
-  }
-
-  bool horiz = cur.width > cur.height ? false : true;
-  int split = make_split(cur, horiz);
-  if(split <= 0) return;  // end recursion
-
-  Room left = cur;
-  Room right = cur;
-
-  if(horiz) {
-    if(split >= int(cur.height)) return; // end recursion
-
-    left.height = size_t(split - 1);
-    right.y = cur.y + split;
-    right.height = size_t(cur.height - split);
-  } else {
-    if(split >= int(cur.width)) return; // end recursion
-
-    left.width = size_t(split-1);
-    right.x = cur.x + split,
-    right.width = size_t(cur.width - split);
-  }
-
-  // BUG: min room size should be configurable
-  if(depth > 0  && left.width > 2 && left.height > 2) {
-    partition_map(left, depth-1);
+void WorldBuilder::generate_map() {
+  std::vector<Point> dead_ends;
+  maze::hunt_and_kill($map.$walls, $map.$rooms, dead_ends);
+
+  for(auto at : dead_ends) {
+    if(Random::uniform(0,1)) {
+      Room cur{at.x, at.y, 2, 2};
+      add_door(cur);
+      $map.add_room(cur);
+    }
   }
 
-  // BUG: min room size should be configurable
-  if(depth > 0 && right.width > 2 && right.height > 2) {
-    partition_map(right, depth-1);
-  }
-}
+  maze::hunt_and_kill($map.$walls, $map.$rooms, dead_ends);
 
-void WorldBuilder::update_door(Point &at, int wall_or_space) {
-  $map.$walls[at.y][at.x] = wall_or_space;
-}
-
-
-void WorldBuilder::stylize_room(int room, string tile_name, float size) {
-  Point pos_out;
-  bool placed = $map.place_entity(room, pos_out);
-  dbc::check(placed, "failed to place style in room");
-  (void)tile_name;
-  (void)size;
-
-  //tile_name = tile_name == "FLOOR_TILE" ? "WALL_PLAIN" : tile_name;
-
-  //for(matrix::circle it{$map.$walls, pos_out, size}; it.next();) {
-  //  for(int x = it.left; x < it.right; x++) {
-  //    if($map.iswall(x, it.y)) {
-  //      // a wall tile
-  //      $map.$tiles.set_tile(x, it.y, tile_name);
-  //    } else {
-  //      // a floor tile
-  //      $map.$tiles.set_tile(x, it.y, "FLOOR_TILE");
-  //    }
-  //  }
-  //}
-}
-
-void WorldBuilder::generate_rooms() {
-  Room root{
-    .x = 0,
-    .y = 0,
-    .width = $map.$width,
-    .height = $map.$height
-  };
-  // BUG: depth should be configurable
-  partition_map(root, 10);
-  place_rooms();
-
-  dbc::check($map.room_count() > 0, "map generated zero rooms, map too small?");
-}
-
-void WorldBuilder::generate_map() {
-  maze::hunt_and_kill($map.$walls, $map.$rooms);
   $map.expand();
   $map.load_tiles();
-
-  // get only the tiles with no collision to fill rooms
-  auto room_types = $map.$tiles.tile_names(false);
-
-  for(size_t i = 0; i < $map.$rooms.size() - 1; i++) {
-    size_t room_type = Random::uniform<size_t>(0, room_types.size() - 1);
-    int room_size = Random::uniform<int>(100, 800);
-    string tile_name = room_types[room_type];
-    stylize_room(i, tile_name, room_size * 0.01f);
-  }
 }
 
 
@@ -260,72 +176,3 @@ void WorldBuilder::generate(DinkyECS::World &world) {
   generate_map();
   place_entities(world);
 }
-
-void WorldBuilder::make_room(size_t origin_x, size_t origin_y, size_t w, size_t h) {
-  $map.INVARIANT();
-  dbc::pre("y out of bounds", origin_y + h < $map.$height);
-  dbc::pre("x out of bounds", origin_x + w < $map.$width);
-
-  for(size_t y = origin_y; y < origin_y + h; ++y) {
-    for(size_t x = origin_x; x < origin_x + w; ++x) {
-      $map.$walls[y][x] = INV_SPACE;
-    }
-  }
-}
-
-
-void WorldBuilder::place_rooms() {
-  for(auto &cur : $map.$rooms) {
-    add_door(cur);
-    make_room(cur.x, cur.y, cur.width, cur.height);
-  }
-}
-
-inline bool random_path(Map &map, PointList &holes, Point src, Point target) {
-  bool keep_going = false;
-  bool target_found = false;
-  int count = 0;
-  map.set_target(target);
-  map.make_paths();
-  Matrix &paths = map.paths();
-
-  Point out{src.x, src.y};
-  do {
-    keep_going = map.neighbors(out, true);
-    holes.push_back(out);
-    target_found = paths[out.y][out.x] == 0;
-  } while(!target_found && keep_going && ++count < WORLDBUILD_MAX_PATH);
-
-  map.INVARIANT();
-  map.clear_target(target);
-
-  return target_found;
-}
-
-inline void straight_path(Map &map, PointList &holes, Point src, Point target) {
-  for(matrix::line dig{src, target}; dig.next();) {
-    holes.emplace_back(size_t(dig.x), size_t(dig.y));
-    Point expand{(size_t)dig.x+1, (size_t)dig.y};
-
-    if(map.inmap(expand.x, expand.y)) {
-      // BUG? should really just move doors away from the edge
-      holes.push_back(expand);
-    }
-  }
-}
-
-void WorldBuilder::tunnel_doors(PointList &holes, Room &src, Room &target) {
-  int path_type = Random::uniform<int>(0, 10);
-
-  switch(path_type) {
-    case 0:
-      // then do the rest as random with fallback
-      if(!random_path($map, holes, src.exit, target.entry)) {
-        straight_path($map, holes, src.exit, target.entry);
-      }
-      break;
-    default:
-      // for now do 25% as simple straight paths
-      straight_path($map, holes, src.exit, target.entry);
-  }
-}

worldbuilder.hpp

@@ -14,15 +14,7 @@ class WorldBuilder {
     $components(components)
   { }
 
-  void partition_map(Room &cur, int depth);
-  void make_room(size_t origin_y, size_t origin_x, size_t width, size_t height);
   void add_door(Room &room);
-  void set_door(Room &room, int value);
-  void place_rooms();
-  void tunnel_doors(PointList &holes, Room &src, Room &target);
-  void update_door(Point &at, int wall_or_space);
-  void stylize_room(int room, std::string tile_name, float size);
-  void generate_rooms();
   void generate_map();
 
   DinkyECS::Entity configure_entity_in_map(DinkyECS::World &world, nlohmann::json &entity_data, int in_room);