Update viewer.js

viewer.js

@@ -104,7 +104,7 @@ export async function initializeViewer(config, instanceId) {
   }
 
   try {
-    // ─── 6. Create a GraphicsDevice + AppBase ─────────────────────────────────
+    // ─── 6. Create a GraphicsDevice + AppOptions ────────────────────────────────
     const deviceType = "webgl2";
     const gfxOptions = {
       deviceTypes: [deviceType],
@@ -137,8 +137,10 @@ export async function initializeViewer(config, instanceId) {
       pc.GSplatHandler
     ];
 
-    app = new pc.AppBase(canvas);
-    app.init(createOptions);
+    // ─── REPLACED: use pc.Application (instead of deprecated / removed AppBase) ──
+    app = new pc.Application(canvas, createOptions);
+
+    // Configure application
     app.setCanvasFillMode(pc.FILLMODE_NONE);
     app.setCanvasResolution(pc.RESOLUTION_AUTO);
     app.scene.exposure    = 0.5;