Autotiles are a new asset type with a tab that shows every tile of the floor (2x3) or wall (2x2) block and an animated sample pattern (#118)

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/core/properties/PropertySchema.ts

@@ -20,6 +20,7 @@ import {
   type VariableKind,
 } from './kinds';
 import { findAssetOf, type Project } from '../model/Project';
+import { AUTOTILE_FPS_KEY, AUTOTILE_KIND_KEY, AUTOTILE_PLAYBACK_KEY } from '../model/autotile';
 import { SLICE_SCALE_KEY } from '../model/texture';
 import type { SceneObject } from '../model/SceneObject';
 import { flatListOf, listItemOf } from './listItems';
@@ -217,6 +218,32 @@ const ASSET_SCHEMAS: Record<AssetType, PropertySchema> = {
       ],
     },
   ],
+  // The pictures are intrinsic data on the asset (see AutotileAsset); these three say what the
+  // block holds and how its steps run. There is no tile size: a block is two tiles wide, so the
+  // picture already says it (see `readAutotile`).
+  autotile: [
+    {
+      key: AUTOTILE_KIND_KEY,
+      label: 'Kind',
+      kind: 'enum',
+      default: 'floor',
+      options: [
+        { value: 'floor', label: 'Floor (2 × 3)' },
+        { value: 'wall', label: 'Wall (2 × 2)' },
+      ],
+    },
+    { key: AUTOTILE_FPS_KEY, label: 'Frames per second', kind: 'number', default: 4, min: 0.1, max: 120 },
+    {
+      key: AUTOTILE_PLAYBACK_KEY,
+      label: 'Playback',
+      kind: 'enum',
+      default: 'loop',
+      options: [
+        { value: 'loop', label: 'Loop' },
+        { value: 'pingpong', label: 'Ping-pong' },
+      ],
+    },
+  ],
   // Behaviors declare their own properties (variables) per asset too – see `schemaForAsset`.
   behavior: [{ key: 'runInEditor', label: 'Run in editor', kind: 'boolean', default: false }],
   // Every row is declared on the asset itself – see `schemaForBag`.