Walkable mask painting

ts/simple_tile_factory.ts

@@ -11,10 +11,8 @@ export class SimpleTileFactory extends AnimatableTileFactory {
 
   build(tileset: string): SimpleTile {
     return new SimpleTile(
-      this.width,
-      this.height,
+      ...this.animatable_tile_args(),
       `images/${this.name.replace('{tileset}', tileset)}`,
-      this.animations,
     );
   }
 
@@ -26,28 +24,3 @@ export class SimpleTileFactory extends AnimatableTileFactory {
     return stf;
   }
 }
-
-/*
-function string_to_mask(mask_string: string): boolean[][] {
-  // mask_string: '\n+++\n+++\n'
-
-  const rows = mask_string.trim().split('\n');
-  // rows: ['+++', '+++']
-
-  const mask = [];
-  for (let x = 0; x < rows[0].length; x++) {
-    mask[x] = Array(rows.length);
-  }
-  // mask: [ [ empty, empty ], [ empty, empty ], [ empty, empty ] ]
-
-  for (let y = 0; y < rows.length; y++) {
-    const row = rows[y];
-    for (let x = 0; x < row.length; x++) {
-      const cell = row[x];
-      mask[x][y] = (cell.toUpperCase() == 'X');
-    }
-  }
-
-  return mask;
-}
-*/