First remotely working WFC

lib/world/level.dart

@@ -1,5 +1,33 @@
-import 'dart:ui';
+import 'package:dartterm/wfc/template.dart';
+
+enum LevelTile {
+  exit,
+  door,
+  floor,
+  wall,
+}
 
 class Level {
   Set<(int, int)> openCells = {};
 }
+
+Future<WfcTemplate<LevelTile>> loadLevelWfcAsync(String name) async {
+  return WfcTemplate.loadAsync(name, 2, (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");
+    }
+  });
+}