Walkable mask painting

js/tile_factory.js

@@ -1,8 +1,19 @@
 export class TileFactory {
     constructor(layer_name, width, height) {
+        this.masks = new Map();
         this.layer_name = layer_name;
         this.width = width;
         this.height = height;
     }
+    add_mask(name, mask) {
+        this.masks.set(name, mask);
+    }
+    tile_args() {
+        return [
+            this.width,
+            this.height,
+            this.masks,
+        ];
+    }
 }
 //# sourceMappingURL=tile_factory.js.map