Update app.py

app.py

@@ -603,17 +603,18 @@ with gr.Blocks(css=css) as demo:
               
               document.getElementById(\"model3D\").getElementsByTagName(\"canvas\")[0].style.filter = \"blur(\" + BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1].material.pointSize/2.0*Math.sqrt(2.0) + \"px)\";
 
-try {
-              const gizmoManager = new BABYLON.GizmoManager(BABYLON.Engine.LastCreatedScene);
-              gizmoManager.positionGizmoEnabled = true;
-              gizmoManager.rotationGizmoEnabled = true;
-              gizmoManager.scaleGizmoEnabled = false;
-              gizmoManager.boundingBoxGizmoEnabled = false;
-              
-              gizmoManager.usePointerToAttachGizmos = false;
-              gizmoManager.attachToMesh(BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1]);
-} catch(e) {alert(e);}
+              if (!BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager) {
+                BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager = new BABYLON.GizmoManager(BABYLON.Engine.LastCreatedScene, 8);
+                
+                BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager.positionGizmoEnabled = true;
+                BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager.rotationGizmoEnabled = true;
+                BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager.scaleGizmoEnabled = true;
+                BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager.boundingBoxGizmoEnabled = false;
               
+                BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager.usePointerToAttachGizmos = false;
+              }
+              BABYLON.Engine.LastCreatedScene.activeCamera.metadata.gizmoManager.attachToMesh(BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1]);
+            
             '>reset camera</a>""")
             contrast = gr.HTML(value="""<label for='contrast'>Contrast</label><input id='contrast' type='range' style='width:256px;height:1em;' value='2.0' min='0' max='2' step='0.001' oninput='
               if (!BABYLON.Engine.LastCreatedScene.activeCamera.metadata) {