Update app.py

app.py

@@ -592,6 +592,8 @@ async(c, o, p, d, n, m)=>{
           }*/
           BABYLON.Engine.LastCreatedScene.getAnimationRatio();
         });
+        BABYLON.Engine.LastCreatedScene.activeCamera = new BABYLON.ArcRotateCamera("camera", 0, Math.PI / 2, 1.0, new BABYLON.Vector3(0, 0, 0));
+        
         if (!BABYLON.Engine.LastCreatedScene.activeCamera.metadata) {
           BABYLON.Engine.LastCreatedScene.activeCamera.metadata = {
             pipeline: new BABYLON.DefaultRenderingPipeline("default", true, BABYLON.Engine.LastCreatedScene, [BABYLON.Engine.LastCreatedScene.activeCamera]) 
@@ -601,7 +603,7 @@ async(c, o, p, d, n, m)=>{
         BABYLON.Engine.LastCreatedScene.activeCamera.metadata.pipeline.imageProcessing.contrast = 1.0;
         BABYLON.Engine.LastCreatedScene.activeCamera.metadata.pipeline.imageProcessing.exposure = 1.0;
 
-        BABYLON.Engine.LastCreatedScene.activeCamera.detachControl(document.getElementById("model3D").getElementsByTagName("canvas")[0]);
+        //BABYLON.Engine.LastCreatedScene.activeCamera.detachControl(document.getElementById("model3D").getElementsByTagName("canvas")[0]);
         BABYLON.Engine.LastCreatedScene.activeCamera.inertia = 0.0;
         //pan
         BABYLON.Engine.LastCreatedScene.activeCamera.panningInertia = 0.0;
@@ -612,8 +614,8 @@ async(c, o, p, d, n, m)=>{
         BABYLON.Engine.LastCreatedScene.activeCamera.wheelDeltaPercentage = 1/256;
         BABYLON.Engine.LastCreatedScene.activeCamera.upperRadiusLimit = 1.57 / 0.8;
         BABYLON.Engine.LastCreatedScene.activeCamera.lowerRadiusLimit = 0.157 / 0.8;
-        BABYLON.Engine.LastCreatedScene.activeCamera.attachControl(document.getElementById("model3D").getElementsByTagName("canvas")[0], false);
-        alert(BABYLON.Engine.LastCreatedScene.activeCamera.inertia);
+        //BABYLON.Engine.LastCreatedScene.activeCamera.attachControl(document.getElementById("model3D").getElementsByTagName("canvas")[0], false);
+        
         BABYLON.Engine.LastCreatedScene.activeCamera.fov = document.getElementById("zoom").value;
 
         document.getElementById("model3D").getElementsByTagName("canvas")[0].style.filter = "blur(" + Math.ceil(Math.log2(Math.PI/document.getElementById("zoom").value))/2.0*Math.sqrt(2.0) + "px)";