Update app.py

app.py

@@ -594,8 +594,7 @@ async(c, o, p, d, n, m, s)=>{
           BABYLON.Engine.LastCreatedScene.getAnimationRatio();
         });
         var CoT = new BABYLON.TransformNode("root");
-        BABYLON.Engine.LastCreatedScene.activeCamera = new BABYLON.ArcRotateCamera("camera", 0, Math.PI / 2, 1.0, new BABYLON.Vector3(0, 0, 0));
-        CoT.parent = BABYLON.Engine.LastCreatedScene.activeCamera;
+        BABYLON.Engine.LastCreatedScene.activeCamera = new BABYLON.ArcRotateCamera("camera", 0, Math.PI / 2, 1.0, new BABYLON.Vector3(0, 0, 0))
         BABYLON.Engine.LastCreatedScene.activeCamera.target = CoT;
         
         if (!BABYLON.Engine.LastCreatedScene.activeCamera.metadata) {
@@ -695,7 +694,8 @@ async(c, o, p, d, n, m, s)=>{
         //BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].material.useAlphaFromEmissiveTexture = true;
         BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].alphaIndex = 1;
         BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].visibility = 0.9999;
-        
+
+        window.CoT = CoT;
         window.md = false;
         window.r_old = 1.0;
         window.a_old = 0;
@@ -713,6 +713,9 @@ async(c, o, p, d, n, m, s)=>{
         if (md === true) {
           x = parseInt(evt.clientX - evt.target.getBoundingClientRect().x);
           y = parseInt(evt.clientY - evt.target.getBoundingClientRect().y);
+          CoT.rotation.y = BABYLON.Engine.LastCreatedScene.activeCamera.alpha;
+          CoT.rotation.x = BABYLON.Engine.LastCreatedScene.activeCamera.beta;
+          CoT.position.z = BABYLON.Engine.LastCreatedScene.activeCamera.radius;
           
           if (Math.abs(x-xold)>16 || Math.abs(y-yold)>16) {
             if (Math.abs(BABYLON.Engine.LastCreatedScene.activeCamera.radius) > 16) {