Update app.py

app.py

@@ -353,18 +353,16 @@ with gr.Blocks(css=css) as demo:
               } 
               BABYLON.Engine.LastCreatedScene.activeCamera.metadata.pipeline.samples = 4; 
               document.getElementsByClassName(\"model3D\")[0].getElementsByTagName(\"canvas\")[0].onfocus = function() {
-                BABYLON.Engine.LastCreatedScene.getNodes()[1].position.z = 0;
-                BABYLON.Engine.LastCreatedScene.getNodes()[1].position.y = 0;
-                BABYLON.Engine.LastCreatedScene.getNodes()[1].position.x = 0;
+                BABYLON.Engine.LastCreatedScene.getNodes()[1].setPivotPoint(BABYLON.Engine.LastCreatedScene.activeCamera.position);
+                BABYLON.Engine.LastCreatedScene.getNodes()[1].rotation.y = 0;
               }
               try {
               BABYLON.Engine.LastCreatedScene.activeCamera.radius = 255;
               var tg = new BABYLON.Vector3(BABYLON.Engine.LastCreatedScene.activeCamera.position.x, BABYLON.Engine.LastCreatedScene.activeCamera.position.y, BABYLON.Engine.LastCreatedScene.activeCamera.position.z);
               BABYLON.Engine.LastCreatedScene.activeCamera.radius = 0;
               
-              BABYLON.Engine.LastCreatedScene.activeCamera.setTarget(tg);
-              BABYLON.Engine.LastCreatedScene.activeCamera.alpha = this.value * Math.PI/16;
-              BABYLON.Engine.LastCreatedScene.getNodes()[1].rotation.y = BABYLON.Engine.LastCreatedScene.activeCamera.alpha
+              BABYLON.Engine.LastCreatedScene.getNodes()[1].setPivotPoint(tg);
+              BABYLON.Engine.LastCreatedScene.getNodes()[1].rotation.y = this.value * Math.PI/16;
               this.parentNode.childNodes[2].innerText = this.value;
               } catch(e) {alert(e);}
             '/><span>0.0</span>""")
@@ -407,7 +405,7 @@ with gr.Blocks(css=css) as demo:
                   BABYLON.Engine.LastCreatedScene.activeCamera.metadata.screenshot = false;
                   try {
                     BABYLON.Tools.CreateScreenshotUsingRenderTarget(BABYLON.Engine.LastCreatedScene.getEngine(), BABYLON.Engine.LastCreatedScene.activeCamera, 
-                      { width: document.getElementsByTagName(\"video\")[0].width }, (durl) => { 
+                      { width: 1024 }, (durl) => { 
                         document.getElementById(\"img_out\").onload = function() {
                           var svgd = `<svg id=\"svg_out\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">
                             <defs>