From 7a0b2f988d5907e380db471feea6fbdd0529c7ca Mon Sep 17 00:00:00 2001
From: "Zed A. Shaw" <zed.shaw@gmail.com>
Date: Sun, 18 May 2025 01:00:47 -0400
Subject: [PATCH] Add a terrible maze generation algorithm to test if a maze
 style map looks/feels better. The walls are disabled so you can walk around.

---
 Makefile          |   4 +-
 gui/status_ui.cpp |  16 ++---
 levelmanager.cpp  |   4 +-
 matrix.cpp        |   2 +
 maze.cpp          | 145 ++++++++++++++++++++++++++++++++++++++++++++++
 maze.hpp          |   7 +++
 meson.build       |   2 +
 tests/mazes.cpp   |  23 ++++++++
 worldbuilder.cpp  |  60 +++++++------------
 9 files changed, 209 insertions(+), 54 deletions(-)
 create mode 100644 maze.cpp
 create mode 100644 maze.hpp
 create mode 100644 tests/mazes.cpp

diff --git a/Makefile b/Makefile
index 6b74d7b..cf97b8f 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ tracy_build:
 	meson compile -j 10 -C builddir
 
 test: build
-	./builddir/runtests
+	./builddir/runtests "[maze-gen]"
 
 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 "[maze-gen]"
 
 win_installer:
 	powershell 'start "C:\Program Files (x86)\solicus\InstallForge\bin\ifbuilderenvx86.exe" scripts\win_installer.ifp'
diff --git a/gui/status_ui.cpp b/gui/status_ui.cpp
index 5c6c8b7..b3173b4 100644
--- a/gui/status_ui.cpp
+++ b/gui/status_ui.cpp
@@ -15,11 +15,11 @@ namespace gui {
     $gui.position(STATUS_UI_X, STATUS_UI_Y, STATUS_UI_WIDTH, STATUS_UI_HEIGHT);
     $gui.layout(
         "[ ritual_ui ]"
-        "[inv_slot1 | inv_slot2 | inv_slot3]"
-        "[inv_slot4 | inv_slot5 | inv_slot6]"
-        "[*%(200,300)character_view|_|stat1]"
-        "[_|_|stat2]"
-        "[_|_|stat3]");
+        "[inv_1|inv_2|inv_3]"
+        "[inv_4|*%(200,300)character_view|_|inv_5]"
+        "[inv_6|_|_                        |inv_7]"
+        "[inv_8|_|_                        |inv_9]"
+        "[inv_10|inv_11|inv_12]");
 
     size_t inv_id = 0;
     for(auto [name, entity] : $gui.$name_ents) {
@@ -37,14 +37,9 @@ namespace gui {
         auto char_view = $gui.entity(name);
         $gui.set<Rectangle>(char_view, {});
         $gui.set<Sprite>(char_view, {"peasant_girl"});
-      } else if(name.starts_with("stat")) {
-        auto stat = $gui.entity(name);
-        $gui.set<Rectangle>(stat, {});
-        $gui.set<Label>(stat, {guecs::to_wstring(name)});
       } else {
         auto button = $gui.entity(name);
         $gui.set<Rectangle>(button, {});
-        $gui.set<Textual>(button, {L""});
         $gui.set<ActionData>(button, {make_any<string>(name)});
 
         if(name == "ritual_ui") {
@@ -53,6 +48,7 @@ namespace gui {
           });
           $gui.set<Sound>(button, {"pickup"});
         } else {
+          $gui.set<Textual>(button, {guecs::to_wstring(name)});
           $gui.set<Clickable>(button, {
               [this](auto ent, auto data){ select_slot(ent, data); }
           });
diff --git a/levelmanager.cpp b/levelmanager.cpp
index 5d8afcb..457033f 100644
--- a/levelmanager.cpp
+++ b/levelmanager.cpp
@@ -17,8 +17,8 @@ LevelManager::LevelManager() {
 
 LevelScaling LevelManager::scale_level() {
   return {
-    20 + (5 * int($current_level)),
-    15 + (5 * int($current_level))
+    21,
+    21
   };
 }
 
diff --git a/matrix.cpp b/matrix.cpp
index c32c036..59044d1 100644
--- a/matrix.cpp
+++ b/matrix.cpp
@@ -19,6 +19,8 @@ namespace matrix {
         print("{:x}<", cell);
       } else if(cell == WALL_PATH_LIMIT) {
         print("# ");
+      } else if(cell == 0) {
+        print(". ");
       } else if(cell > 15 && cell < 32) {
         print("{:x}+", cell - 16);
       } else if(cell > 31) {
diff --git a/maze.cpp b/maze.cpp
new file mode 100644
index 0000000..ec5b069
--- /dev/null
+++ b/maze.cpp
@@ -0,0 +1,145 @@
+#include <fmt/core.h>
+#include <string>
+#include "rand.hpp"
+#include "constants.hpp"
+#include "maze.hpp"
+
+using std::string;
+using matrix::Matrix;
+
+inline size_t rand(size_t i, size_t j) {
+  if(i < j) {
+    return Random::uniform(i, j);
+  } else if(j < i) {
+    return Random::uniform(j, i);
+  } else {
+    return i;
+  }
+}
+
+
+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));
+}
diff --git a/maze.hpp b/maze.hpp
new file mode 100644
index 0000000..2a4a8ef
--- /dev/null
+++ b/maze.hpp
@@ -0,0 +1,7 @@
+#pragma once
+#include "matrix.hpp"
+#include "map.hpp"
+
+namespace maze {
+  void recursive_div(matrix::Matrix& map, std::vector<Room>& rooms);
+}
diff --git a/meson.build b/meson.build
index 9167429..e8fd589 100644
--- a/meson.build
+++ b/meson.build
@@ -124,6 +124,7 @@ sources = [
   'textures.cpp',
   'tilemap.cpp',
   'worldbuilder.cpp',
+  'maze.cpp'
 ]
 
 executable('runtests', sources + [
@@ -150,6 +151,7 @@ executable('runtests', sources + [
   'tests/stats.cpp',
   'tests/textures.cpp',
   'tests/tilemap.cpp',
+  'tests/mazes.cpp',
   ],
   cpp_args: cpp_args,
   link_args: link_args,
diff --git a/tests/mazes.cpp b/tests/mazes.cpp
new file mode 100644
index 0000000..7d1cc1b
--- /dev/null
+++ b/tests/mazes.cpp
@@ -0,0 +1,23 @@
+#include <catch2/catch_test_macros.hpp>
+#include <fmt/core.h>
+#include <string>
+#include "matrix.hpp"
+#include "rand.hpp"
+#include "constants.hpp"
+#include "maze.hpp"
+
+using std::string;
+using matrix::Matrix;
+
+TEST_CASE("simple maze first attempt", "[maze-gen]") {
+  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);
+  }
+}
diff --git a/worldbuilder.cpp b/worldbuilder.cpp
index ee29490..db412da 100644
--- a/worldbuilder.cpp
+++ b/worldbuilder.cpp
@@ -5,6 +5,7 @@
 #include "components.hpp"
 #include "inventory.hpp"
 #include "rituals.hpp"
+#include "maze.hpp"
 
 using namespace fmt;
 using namespace components;
@@ -103,20 +104,22 @@ void WorldBuilder::stylize_room(int room, string tile_name, float size) {
   Point pos_out;
   bool placed = $map.place_entity(room, pos_out);
   dbc::check(placed, "failed to place style in room");
-
-  tile_name = tile_name == "FLOOR_TILE" ? "WALL_PLAIN" : tile_name;
-
-  for(matrix::circle it{$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)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() {
@@ -134,33 +137,10 @@ void WorldBuilder::generate_rooms() {
 }
 
 void WorldBuilder::generate_map() {
-  generate_rooms();
-
-  PointList holes;
-  for(size_t i = 0; i < $map.$rooms.size() - 1; i++) {
-    tunnel_doors(holes, $map.$rooms[i], $map.$rooms[i+1]);
-  }
-
-  // one last connection from first room to last
-  tunnel_doors(holes, $map.$rooms.back(), $map.$rooms.front());
-
-  // place all the holes
-  for(auto hole : holes) {
-
-    if(!matrix::inbounds($map.$walls, hole.x, hole.y)) {
-      matrix::dump("MAP BEFORE CRASH", $map.$walls, hole.x, hole.y);
-
-      auto err = fmt::format("invalid hold target {},{} map is only {},{}",
-        hole.x, hole.y, matrix::width($map.$walls),
-        matrix::height($map.$walls));
-
-      dbc::sentinel(err);
-    }
-
-    $map.$walls[hole.y][hole.x] = INV_SPACE;
-  }
+  matrix::dump("BEFORE MAZE:", $map.$walls);
+  maze::recursive_div($map.$walls, $map.$rooms);
+  matrix::dump("AFTER MAZE:", $map.$walls);
 
-  $map.invert_space();
   $map.expand();
   $map.load_tiles();