Well, it's sort of working

lib/algorithms/regionalize.dart

@@ -4,17 +4,24 @@ class Region {
   final math.Rectangle<int> rect;
   final Set<(int, int)> points;
 
+  bool get isRectangle => points.length == rect.width * rect.height;
+
   Region(this.rect, this.points);
 
-  static fromNonEmptySet(Set<(int, int)> s) {
+  static Region fromNonEmptySet(Set<(int, int)> s) {
     assert(s.isNotEmpty);
     int xMin = s.map<int>((xy) => xy.$1).reduce(math.min);
     int yMin = s.map<int>((xy) => xy.$2).reduce(math.min);
     int xMax = s.map<int>((xy) => xy.$1).reduce(math.max);
     int yMax = s.map<int>((xy) => xy.$2).reduce(math.max);
     var rect = math.Rectangle.fromPoints(
-        math.Point(xMin, yMin), math.Point(xMax, yMax));
-    Region(rect, s);
+        math.Point(xMin, yMin), math.Point(xMax + 1, yMax + 1));
+    return Region(rect, s);
+  }
+
+  @override
+  String toString() {
+    return "Region($rect, $points)";
   }
 }
 
@@ -23,22 +30,25 @@ List<Region> regionalize(
   int nextRegion = 0;
   Map<(int, int), int> regions = {};
 
-  void floodfill(int x, int y, region) {
+  int floodfill(int x, int y) {
+    int workDone = 0;
     if (!rect.containsPoint(math.Point(x, y))) {
-      return;
+      return workDone;
     }
     if (regions[(x, y)] != null) {
-      return;
+      return workDone;
     }
     if (!isAccessible(x, y)) {
-      return;
+      return workDone;
     }
 
-    regions[(x, y)] = region;
-    floodfill(x - 1, y, region);
-    floodfill(x + 1, y, region);
-    floodfill(x, y - 1, region);
-    floodfill(x, y + 1, region);
+    regions[(x, y)] = nextRegion;
+    workDone += 1;
+    workDone += floodfill(x - 1, y);
+    workDone += floodfill(x + 1, y);
+    workDone += floodfill(x, y - 1);
+    workDone += floodfill(x, y + 1);
+    return workDone;
   }
 
   // TODO: This can be done more efficiently with a union/find data structure
@@ -46,21 +56,20 @@ List<Region> regionalize(
   for (var y = rect.top; y < rect.bottom; y++) {
     for (var x = rect.left; x < rect.right; x++) {
       if (regions[(x, y)] == null) {
-        floodfill(x, y, nextRegion);
+        if (floodfill(x, y) > 0) {
           nextRegion += 1;
         }
       }
     }
-  return _toExplicit(regions);
+  }
+  return _toExplicit(regions, nextRegion);
 }
 
-List<Region> _toExplicit(Map<(int, int), int> regions) {
-  List<Set<(int, int)>> pointsOut = [
-    for (var i = 0; i < regions.length; i++) Set()
-  ];
-  for (var MapEntry(key: (x, y), value: id_) in regions.entries) {
-    pointsOut[id_].add((x, y));
+List<Region> _toExplicit(Map<(int, int), int> pointRegions, int nRegions) {
+  List<Set<(int, int)>> regionPoints = [for (var i = 0; i < nRegions; i++) {}];
+  for (var MapEntry(key: (x, y), value: id_) in pointRegions.entries) {
+    regionPoints[id_].add((x, y));
   }
 
-  return [for (var s in pointsOut) Region.fromNonEmptySet(s)];
+  return [for (var s in regionPoints) Region.fromNonEmptySet(s)];
 }

lib/bitmap.dart

@@ -0,0 +1,46 @@
+import 'dart:math' as math;
+import 'dart:typed_data';
+import 'dart:ui' as ui;
+
+import 'package:flutter/services.dart';
+
+class Bitmap<T> {
+  // This idiosyncratic usage of "bitmap" comes from some other technology.
+  // What I'm saying is "don't blame me"
+  final math.Rectangle<int> rect;
+  final List<T> data;
+
+  Bitmap(this.rect, this.data) {
+    assert(this.data.length == this.rect.width * this.rect.height);
+  }
+
+  static Future<Bitmap<T>> load<T>(String name, T Function(int) cb) async {
+    final assetImageByteData = await rootBundle.load(name);
+    final codec =
+        await ui.instantiateImageCodec(assetImageByteData.buffer.asUint8List());
+    final image = (await codec.getNextFrame()).image;
+
+    final bytedata =
+        (await image.toByteData(format: ui.ImageByteFormat.rawStraightRgba))!;
+
+    final sx = image.width;
+    final sy = image.height;
+
+    final List<T> data = [];
+    for (var i = 0; i < sx * sy; i++) {
+      var pixel = bytedata.getUint32(i * 4, Endian.big);
+      data.add(cb(pixel));
+    }
+
+    return Bitmap(math.Rectangle(0, 0, sx, sy), data);
+  }
+
+  T? get(int x, int y) {
+    var realX = x - rect.top;
+    var realY = y - rect.left;
+    if (realX < 0 || realY < 0 || realX > rect.width || realY > rect.height) {
+      return null;
+    }
+    return data[realY * rect.width + realX];
+  }
+}

lib/game.dart

@@ -1,22 +1,22 @@
 import 'dart:developer';
 import 'dart:math' as math;
 import 'package:dartterm/assets.dart';
-import 'package:dartterm/colors.dart';
 import 'package:dartterm/gen/generator.dart';
+import 'package:dartterm/input.dart';
+import 'package:dartterm/skreek.dart';
 import 'package:dartterm/terminal.dart';
-import 'package:dartterm/world/level.dart';
 
 void main() async {
   Vaults vaults;
   while (true) {
-    log("about to load template");
+    skreek("about to load template");
     at(0, 0).clear();
     at(0, 0).puts("Loading template!");
     Vaults? maybeVaults =
-        getVaultsIfAvailable("assets/images/wfc/bighouse2.png");
+        getVaultsIfAvailable("assets/images/vaults/house1.png");
 
     if (maybeVaults != null) {
-      log("wasn't null!");
+      skreek("wasn't null!");
       vaults = maybeVaults;
       break;
     }
@@ -45,19 +45,32 @@ void main() async {
       for (var x = 0; x < w; x++) {
         var cursor = at(x * 2, y * 2).big();
         switch (output.tiles[x + y * w]) {
-          case LevelTile.floor:
+          case VaultTile.bspfloor:
             cursor.puts(" ");
-          case LevelTile.door:
+          case VaultTile.floor:
+            cursor.puts(".");
+          case VaultTile.door:
             cursor.puts("d");
-          case LevelTile.wall:
+          case VaultTile.wall:
             cursor.puts("#");
-          case LevelTile.exit:
+          case VaultTile.exit:
             cursor.puts("X");
         }
       }
     }
+    inpLoop:
+    await for (var inp in rawInput()) {
+      print(inp);
+      switch (inp) {
+        case Keystroke(text: "a"):
+          seed -= 1;
+          break inpLoop;
+        case Keystroke(text: "d"):
           seed += 1;
-    await zzz(0.1);
+          break inpLoop;
+        default:
+      }
+    }
   }
 }
 /*

lib/gen/generator.dart

@@ -1,7 +1,8 @@
-import 'dart:developer';
 import 'dart:math' as math;
 
-import 'package:dartterm/world/level.dart';
+import 'package:dartterm/algorithms/regionalize.dart';
+import 'package:dartterm/bitmap.dart';
+import 'package:dartterm/skreek.dart';
 
 part 'direction.dart';
 part 'direction_set.dart';
@@ -23,7 +24,7 @@ class Generator {
     var vx = req.vx;
     var vy = req.vy;
 
-    var v = Vault.blank(vx, vy, req.smooth, LevelTile.wall);
+    var v = Vault.blank(vx, vy, req.smooth, VaultTile.wall);
 
     if (req.vx < 2 || req.vy < 2) {
       return v;
@@ -54,7 +55,7 @@ class Generator {
     var out2 = _generate(req2);
     var out1 = reorientVault(out2, orientation);
 
-    log("$orientation ${requirement.vx} ${requirement.vy} ${req2.vx} ${req2.vy} ${out2.vx} ${out2.vy} ${out1.vx} ${out1.vy}");
+    // log("$orientation ${requirement.vx} ${requirement.vy} ${req2.vx} ${req2.vy} ${out2.vx} ${out2.vy} ${out1.vx} ${out1.vy}");
     assert(out1.vx == requirement.vx);
     assert(out1.vy == requirement.vy);
     return out1;
@@ -63,10 +64,10 @@ class Generator {
   Vault _generate(Requirement req) {
     var vx = req.vx;
     var vy = req.vy;
-    var v = Vault.blank(vx, vy, req.smooth, LevelTile.wall);
+    var v = Vault.blank(vx, vy, req.smooth, VaultTile.wall);
 
     if (vx < 5 || vx * vy < 10) {
-      v.clear(LevelTile.floor);
+      v.clear(VaultTile.bspfloor);
     } else {
       // pick a split point
       var splitVx = _random.nextInt(vx - 4) + 2;
@@ -118,6 +119,9 @@ class Generator {
     if (vault.vx < req.vx / 2 || vault.vy < req.vy / 2) {
       return null;
     }
+    if (!vault.smooth.directions.containsAll(req.smooth.directions)) {
+      return null;
+    }
 
     var rsd = req.smooth.directions;
     bool mustFillX =
@@ -125,13 +129,12 @@ class Generator {
     if (vault.vx != req.vx && mustFillX) {
       return null;
     }
-    bool mustFillY =
-        rsd.contains(Direction.left) && rsd.contains(Direction.right);
+    bool mustFillY = rsd.contains(Direction.up) && rsd.contains(Direction.down);
     if (vault.vy != req.vy && mustFillY) {
       return null;
     }
 
-    Vault full = Vault.blank(req.vx, req.vy, req.smooth, LevelTile.wall);
+    Vault full = Vault.blank(req.vx, req.vy, req.smooth, VaultTile.wall);
     int vx = vault.vx;
     int dx;
     if (rsd.contains(Direction.left)) {
@@ -149,7 +152,7 @@ class Generator {
     } else if (rsd.contains(Direction.down)) {
       dy = req.vy - vy;
     } else {
-      dy = _random.nextInt(req.vx - vx);
+      dy = _random.nextInt(req.vy - vy);
     }
     full.blitFrom(vault, dx, dy);
     return full;

lib/gen/requirement.dart

@@ -17,18 +17,4 @@ class Requirement {
   Requirement rotateRight() {
     return Requirement(vy, vx, smooth.rotateRight());
   }
-
-  Requirement unReorient(int r) {
-    assert(r >= 0 && r < 8);
-    Requirement o = this;
-    if (r % 2 == 1) {
-      o = o.flip();
-      r -= 1;
-    }
-    while (r >= 2) {
-      o = o.rotateLeft();
-      r -= 2;
-    }
-    return o;
-  }
 }

lib/gen/vault.dart

@@ -3,7 +3,7 @@ part of 'generator.dart';
 class Vault {
   final int vx, vy;
   final DirectionSet smooth;
-  final List<LevelTile> tiles;
+  final List<VaultTile> tiles;
 
   Vault(this.vx, this.vy, this.smooth, this.tiles) {
     assert(tiles.length == vx * vy);
@@ -14,7 +14,7 @@ class Vault {
   // presence or absence of walls
   //
   // In other words, this is wrong.
-  static Vault fromVaultData(int vx, int vy, List<LevelTile> tiles) {
+  static Vault fromVaultData(int vx, int vy, List<VaultTile> tiles) {
     assert(tiles.length == vx * vy);
     var smooth = {
       Direction.up,
@@ -23,25 +23,25 @@ class Vault {
       Direction.right
     };
     for (var x = 0; x < vx; x++) {
-      if (tiles[x + 0 * vx] == LevelTile.wall) {
+      if (tiles[x + 0 * vx] == VaultTile.wall) {
         smooth.remove(Direction.up);
         break;
       }
     }
     for (var x = 0; x < vx; x++) {
-      if (tiles[x + (vy - 1) * vx] == LevelTile.wall) {
+      if (tiles[x + (vy - 1) * vx] == VaultTile.wall) {
         smooth.remove(Direction.down);
         break;
       }
     }
     for (var y = 0; y < vy; y++) {
-      if (tiles[0 + y * vx] == LevelTile.wall) {
+      if (tiles[0 + y * vx] == VaultTile.wall) {
         smooth.remove(Direction.left);
         break;
       }
     }
     for (var y = 0; y < vy; y++) {
-      if (tiles[vx - 1 + y * vx] == LevelTile.wall) {
+      if (tiles[vx - 1 + y * vx] == VaultTile.wall) {
         smooth.remove(Direction.right);
         break;
       }
@@ -50,7 +50,7 @@ class Vault {
     return Vault(vx, vy, DirectionSet(smooth), tiles);
   }
 
-  void clear(LevelTile lt) {
+  void clear(VaultTile lt) {
     for (var y = 0; y < vy; y++) {
       for (var x = 0; x < vx; x++) {
         tiles[y * vx + x] = lt;
@@ -71,7 +71,7 @@ class Vault {
   }
 
   Vault flip() {
-    List<LevelTile> tiles2 = [
+    List<VaultTile> tiles2 = [
       for (var y = 0; y < vy; y++)
         for (var x = vx - 1; x >= 0; x--) tiles[y * vx + x]
     ];
@@ -82,7 +82,7 @@ class Vault {
   // TODO: Actually test this logic.
   // This worked in Python, so it might even be right!
   Vault rotateRight() {
-    List<LevelTile> tiles2 = [
+    List<VaultTile> tiles2 = [
       for (var x = 0; x < vx; x++)
         for (var y = 0; y < vy; y++) tiles[(vy - 1 - y) * vx + x]
     ];
@@ -91,7 +91,7 @@ class Vault {
   }
 
   Vault rotateLeft() {
-    List<LevelTile> tiles2 = [
+    List<VaultTile> tiles2 = [
       for (var x = vx - 1; x >= 0; x++)
         for (var y = vy - 1; y >= 0; y++) tiles[y * vx + (vx - 1 - x)]
     ];
@@ -99,21 +99,7 @@ class Vault {
     return Vault(vy, vx, smooth.rotateLeft(), tiles2);
   }
 
-  Vault reorient(int r) {
-    assert(r >= 0 && r < 8);
-    Vault o = this;
-    while (r >= 2) {
-      o = o.rotateRight();
-      r -= 2;
-    }
-    if (r == 1) {
-      o = o.flip();
-      r -= 1;
-    }
-    return o;
-  }
-
-  static Vault blank(int vx, int vy, DirectionSet smooth, LevelTile lt) {
+  static Vault blank(int vx, int vy, DirectionSet smooth, VaultTile lt) {
     var tiles = [
       for (var y = 0; y < vy; y++)
         for (var x = 0; x < vx; x++) lt

lib/gen/vaults.dart

@@ -3,11 +3,6 @@ part of 'generator.dart';
 class Vaults {
   final List<Vault> _primitive = [];
 
-  static Future<Vaults> load(String filename) async {
-    // TODO
-    return Vaults();
-  }
-
   List<Vault> randomFlight(math.Random rng) {
     // TODO: There are many more efficient ways to do this!
     List<Vault> list2 = [];
@@ -15,4 +10,85 @@ class Vaults {
     list2.shuffle(rng);
     return list2;
   }
+
+  static Future<Vaults> load(String name) async {
+    var basis = await Bitmap.load(name, colorToVaultTile);
+
+    var regions = regionalize(basis.rect, (x, y) => basis.get(x, y) != null);
+
+    var vs = Vaults();
+
+    for (var region in regions) {
+      Vault v = loadVault(region, basis);
+      vs._primitive.add(v);
+    }
+
+    return vs;
+  }
+
+  static Vault loadVault(Region r, Bitmap<VaultTile?> b) {
+    skreek("Loading vault: $r");
+    var tiles = [
+      for (var y = r.rect.top; y < r.rect.bottom; y++)
+        for (var x = r.rect.left; x < r.rect.right; x++)
+          b.get(x, y) ?? VaultTile.wall
+    ];
+    DirectionSet smooth = DirectionSet(
+        {Direction.up, Direction.left, Direction.right, Direction.down});
+    for (var x = r.rect.left; x < r.rect.right; x++) {
+      if (b.get(x, r.rect.top) == null) {
+        smooth.directions.remove(Direction.up);
+        break;
+      }
+    }
+    for (var x = r.rect.left; x < r.rect.right; x++) {
+      if (b.get(x, r.rect.bottom - 1) == null) {
+        smooth.directions.remove(Direction.down);
+        break;
+      }
+    }
+    for (var y = r.rect.top; y < r.rect.bottom; y++) {
+      if (b.get(r.rect.left, y) == null) {
+        smooth.directions.remove(Direction.left);
+        break;
+      }
+    }
+    for (var y = r.rect.top; y < r.rect.bottom; y++) {
+      if (b.get(r.rect.right - 1, y) == null) {
+        smooth.directions.remove(Direction.right);
+        break;
+      }
+    }
+
+    return Vault(r.rect.width, r.rect.height, smooth, tiles);
+  }
+}
+
+enum VaultTile {
+  exit,
+  door,
+  bspfloor,
+  floor,
+  wall,
+}
+
+VaultTile? colorToVaultTile(int c) {
+  switch (c) {
+    // RGBA
+    case 0x000000FF:
+    case 0x707070FF:
+      return VaultTile.wall;
+    case 0xFFFFFFFF:
+    case 0xFFFF00FF:
+    case 0xFF00FFFF:
+      return VaultTile.floor;
+    case 0x0087FFFF:
+      return VaultTile.door;
+    case 0xFF0000FF:
+      return VaultTile.exit;
+    case 0x007F00FF:
+      return null;
+    default:
+      throw Exception("unrecognized pixel: $c");
+  }
 }

lib/input.dart

@@ -18,7 +18,7 @@ class Keystroke extends Input {
 
   const Keystroke(this.key, this._text);
 
-  String? text() => _text;
+  String? get text => _text;
 }
 
 enum Button { left, right }

lib/skreek.dart

@@ -0,0 +1,4 @@
+void skreek(String msg) {
+  // ignore: avoid_print
+  print("[skreek] $msg");
+}

lib/terminal.dart

@@ -8,6 +8,7 @@ import 'package:dartterm/colors.dart';
 import 'package:dartterm/cp437.dart';
 import 'package:dartterm/fonts.dart';
 import 'package:dartterm/input.dart';
+import 'package:dartterm/skreek.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 
@@ -71,7 +72,7 @@ class Terminal {
   }
 
   void _notifyInput(Input i) {
-    log("Input: $i $_lastSeenMouse");
+    skreek("Input: $i $_lastSeenMouse");
     _inputSink.add(i);
   }
 

lib/terminal/reexports.dart

@@ -17,6 +17,10 @@ void notifyScreenDimensions(ScreenDimensions sd) {
   _terminal._notifyScreenDimensions(sd);
 }
 
+Stream<Input> rawInput() {
+  return _terminal.rawInput();
+}
+
 void clear() {
   at(0, 0).clear();
 }

lib/world/level.dart

@@ -1,29 +1,3 @@
-enum LevelTile {
-  exit,
-  door,
-  floor,
-  wall,
-}
-
 class Level {
   Set<(int, int)> openCells = {};
 }
-
-LevelTile colorToTile(int c) {
-  switch (c) {
-    // ABGR
-    case 0xFF000000:
-    case 0xFF707070:
-      return LevelTile.wall;
-    case 0xFFFFFFFF:
-    case 0xFF00FFFF:
-    case 0xFFFF00FF:
-      return LevelTile.floor;
-    case 0xFFFF8700:
-      return LevelTile.door;
-    case 0xFF0000FF:
-      return LevelTile.exit;
-    default:
-      throw Exception("unrecognized pixel: $c");
-  }
-}