Playing with maze gen again.

Makefile

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

assets/config.json

@@ -100,6 +100,11 @@
       "frame_width": 256,
       "frame_height": 256
     },
+    "lava_floor":
+    {"path": "assets/lava_floor-256.png",
+      "frame_width": 256,
+      "frame_height": 256
+    },
     "ceiling":
     {"path": "assets/ceiling_test-256.png",
       "frame_width": 256,

map.cpp

@@ -165,21 +165,6 @@ void Map::expand() {
 }
 
 void Map::add_room(Room &room) {
-  room.x++;
-  room.y++;
-  room.width--;
-  room.height--;
-
-  if(room.x + room.width >= $width) {
-    // fix the width
-    room.x--;
-  }
-
-  if(room.y + room.height >= $height) {
-    // fix the height
-    room.y--;
-  }
-
   $rooms.push_back(room);
 }
 

maze.cpp

@@ -93,16 +93,39 @@ inline std::pair<Point, Point> find_coord(Matrix& maze) {
   dbc::sentinel("failed to find coord?");
 }
 
-void maze::hunt_and_kill(Matrix& maze, std::vector<Room>& rooms, std::vector<Point>& dead_ends) {
+void maze::randomize_rooms(std::vector<Room>& rooms_out, std::vector<Point> maybe_here) {
+  dbc::check(maybe_here.size() >= 2, "must have at least two possible points to place rooms");
+
+  while(rooms_out.size() < 2) {
+    // use those dead ends to randomly place rooms
+    for(auto at : maybe_here) {
+      if(Random::uniform(0,1)) {
+        size_t offset = Random::uniform(0,1);
+        Room cur{at.x+offset, at.y+offset, 1, 1};
+        rooms_out.push_back(cur);
+      }
+    }
+  }
+}
+
+void maze::init(Matrix& maze) {
   matrix::assign(maze, WALL_VALUE);
+}
+
+void maze::divide(Matrix& maze, Point start, Point end) {
+  for(matrix::line it{start, end}; it.next();) {
+    maze[it.y][it.x] = 0;
+    maze[it.y+1][it.x] = 0;
+  }
+}
 
-  Point last_even{0,0};
+void maze::hunt_and_kill(Matrix& maze, std::vector<Room>& rooms, std::vector<Point>& dead_ends, bool init_map) {
 
-  for(auto& room : rooms) {
-    if(room.x % 2 == 0 && room.y % 2 == 0) {
-      last_even = {room.x, room.y};
-    }
+  if(init_map) {
+    maze::init(maze);
+  }
 
+  for(auto& room : rooms) {
     for(matrix::box it{maze, room.x, room.y, room.width}; it.next();) {
       maze[it.y][it.x] = 0;
     }
@@ -149,3 +172,34 @@ void maze::hunt_and_kill(Matrix& maze, std::vector<Room>& rooms, std::vector<Poi
     }
   }
 }
+
+void maze::inner_ring(Matrix& maze, size_t outer_size, size_t inner_size) {
+
+  size_t x = matrix::width(maze) / 2;
+  size_t y = matrix::height(maze) / 2;
+
+  for(matrix::box it{maze, x, y, outer_size};
+      it.next();)
+  {
+    maze[it.y][it.x] = 0;
+  }
+
+  for(matrix::box it{maze, x, y, inner_size};
+      it.next();)
+  {
+    maze[it.y][it.x] = 1;
+  }
+}
+
+
+void maze::remove_dead_ends(Matrix& maze, std::vector<Point>& dead_ends) {
+  for(auto at : dead_ends) {
+    for(matrix::compass it{maze, at.x, at.y}; it.next();) {
+      if(maze[it.y][it.x] == 0) {
+        int diff_x = at.x - it.x;
+        int diff_y = at.y - it.y;
+        maze[at.y + diff_y][at.x + diff_x] = 0;
+      }
+    }
+  }
+}

maze.hpp

@@ -3,5 +3,16 @@
 #include "map.hpp"
 
 namespace maze {
-  void hunt_and_kill(Matrix& maze, std::vector<Room>& rooms, std::vector<Point>& dead_ends);
+
+  void init(Matrix& maze);
+
+  void hunt_and_kill(Matrix& maze, std::vector<Room>& rooms, std::vector<Point>& dead_ends, bool init_map=true);
+
+  void randomize_rooms(std::vector<Room>& rooms_out, std::vector<Point> maybe_here);
+
+  void inner_ring(Matrix& map, size_t outer_size, size_t inner_size);
+
+  void divide(Matrix& maze, Point start, Point end);
+
+  void remove_dead_ends(Matrix& maze, std::vector<Point>& dead_ends);
 }

tests/mazes.cpp

@@ -10,16 +10,94 @@ using std::string;
 using matrix::Matrix;
 
 
-TEST_CASE("hunt-and-kill", "[maze-gen]") {
+TEST_CASE("hunt-and-kill", "[mazes]") {
   auto map = matrix::make(21, 21);
   std::vector<Room> rooms;
   std::vector<Point> dead_ends;
 
   maze::hunt_and_kill(map, rooms, dead_ends);
-  matrix::dump("MAZE?", map);
+  matrix::dump("BASIC MAZE", map);
+
+  maze::randomize_rooms(rooms, dead_ends);
+  maze::hunt_and_kill(map, rooms, dead_ends);
 
   for(auto& room : rooms) {
-    fmt::println("room: {},{}; {},{}",
-        room.x, room.y, room.width, room.height);
+    for(matrix::box it{map, room.x, room.y, room.width};
+        it.next();)
+    {
+      map[it.y][it.x] = WALL_PATH_LIMIT;
+    }
+  }
+
+  matrix::dump("MAZE WITH ROOMS", map);
+}
+
+TEST_CASE("hunt-and-kill ring", "[mazes]") {
+  auto map = matrix::make(21, 21);
+  std::vector<Room> rooms;
+  std::vector<Point> dead_ends;
+
+  maze::init(map);
+  maze::inner_ring(map, 5, 2);
+  maze::hunt_and_kill(map, rooms, dead_ends, false);
+
+  for(auto at : dead_ends) {
+    map[at.y][at.x]=32;
   }
+  matrix::dump("RING MAZE", map);
+
+  REQUIRE(rooms.size() == 0);
+}
+
+TEST_CASE("hunt-and-kill fissure", "[mazes]") {
+  auto map = matrix::make(21, 21);
+  std::vector<Room> rooms;
+  std::vector<Point> dead_ends;
+
+  maze::init(map);
+  maze::divide(map, {3,3}, {19,18});
+  maze::hunt_and_kill(map, rooms, dead_ends, false);
+
+  for(auto at : dead_ends) {
+    map[at.y][at.x]=32;
+  }
+  matrix::dump("FISSURE MAZE", map);
+
+  REQUIRE(rooms.size() == 0);
+}
+
+
+
+TEST_CASE("hunt-and-kill no-dead-ends", "[mazes]") {
+  auto map = matrix::make(21, 21);
+  std::vector<Room> rooms;
+  std::vector<Point> dead_ends;
+
+  maze::init(map);
+
+  maze::hunt_and_kill(map, rooms, dead_ends, false);
+
+  maze::remove_dead_ends(map, dead_ends);
+
+  matrix::dump("NO DEAD ENDS", map);
+}
+
+TEST_CASE("hunt-and-kill too much", "[mazes]") {
+  auto map = matrix::make(21, 21);
+  std::vector<Room> rooms;
+  std::vector<Point> dead_ends;
+
+  maze::init(map);
+  maze::inner_ring(map, 4, 2);
+  maze::divide(map, {3,3}, {19,18});
+  auto copy = map;
+
+  maze::hunt_and_kill(copy, rooms, dead_ends, false);
+
+
+  map = copy;
+  maze::randomize_rooms(rooms, dead_ends);
+  maze::hunt_and_kill(map, rooms, dead_ends, false);
+
+  matrix::dump("NO DEAD ENDS", map);
 }

worldbuilder.cpp

@@ -14,13 +14,8 @@ void WorldBuilder::generate_map() {
   // run it once to find dead ends
   maze::hunt_and_kill($map.$walls, $map.$rooms, $map.$dead_ends);
 
-  // use those dead ends to randomly place rooms
-  for(auto at : $map.$dead_ends) {
-    if(Random::uniform(0,1)) {
-      Room cur{at.x, at.y, 2, 2};
-      $map.add_room(cur);
-    }
-  }
+  // randomize rooms based on dead ends
+  maze::randomize_rooms($map.$rooms, $map.$dead_ends);
 
   // run it again to create the final map with rooms
   // NOTE: hund_and_kill is responsible for clearing the map correctly