Add cache clearing method for tilemap objects and use it when reloading resources

Extensions/TileMap/JsExtension.js

@@ -1044,7 +1044,9 @@ module.exports = {
       .setExtensionInformation(
         'TileMap',
         _('Tilemap'),
-        "The Tilemap object can be used to display tile-based objects. It's a good way to create maps for RPG, strategy games or create objects by assembling tiles, useful for platformer, retro-looking games, etc...",
+        _(
+          "The Tilemap object can be used to display tile-based objects. It's a good way to create maps for RPG, strategy games or create objects by assembling tiles, useful for platformer, retro-looking games, etc..."
+        ),
         'Todor Imreorov',
         'Open source (MIT License)'
       )
@@ -1061,6 +1063,25 @@ module.exports = {
     return extension;
   },
 
+  registerClearCache: function (
+    objectsRenderingService /*: ObjectsRenderingService */
+  ) {
+    const TilemapHelper = objectsRenderingService.requireModule(
+      __dirname,
+      'helper/TileMapHelper'
+    );
+
+    const clearCaches = (
+      project /* InstanceHolder - gdProject in the editor */
+    ) => {
+      /** @type {TileMapHelper.TileMapManager} */
+      const manager = TilemapHelper.TileMapManager.getManager(project);
+      manager.clearCaches();
+    };
+
+    objectsRenderingService.registerClearCache(clearCaches);
+  },
+
   /**
    * You can optionally add sanity tests that will check the basic working
    * of your extension behaviors/objects by instantiating behaviors/objects

newIDE/app/src/SceneEditor/index.js

@@ -62,6 +62,7 @@ import MosaicEditorsDisplay from './MosaicEditorsDisplay';
 import SwipeableDrawerEditorsDisplay from './SwipeableDrawerEditorsDisplay';
 import { type SceneEditorsDisplayInterface } from './EditorsDisplay.flow';
 import newNameGenerator from '../Utils/NewNameGenerator';
+import ObjectsRenderingService from '../ObjectsRendering/ObjectsRenderingService';
 
 const gd: libGDevelop = global.gd;
 
@@ -235,6 +236,9 @@ export default class SceneEditor extends React.Component<Props, State> {
         gd.ProjectBrowserHelper.exposeProjectObjects(project, objectsCollector);
         const objectNames = objectsCollector.getObjectNames().toJSArray();
         objectsCollector.delete();
+        ObjectsRenderingService.renderersCacheClearingMethods.forEach(clear =>
+          clear(project)
+        );
         objectNames.forEach(objectName => {
           editorDisplay.instancesHandlers.resetInstanceRenderersFor(objectName);
         });