Update app.py

app.py

@@ -1125,17 +1125,11 @@ with gr.Blocks(css=css, js=js, head=head) as demo:
               <canvas id='cnv_out'></canvas>
               <a href='#' id='fullscreen' onclick='
                 const model = document.getElementById(\"model3D\");
-                if (model.style.width != \"100vw\") {
-                  model.style.width = \"100vw\";
-                  model.style.height = \"100vh\";
-                  model.style.position = \"fixed\";
+                if (model.parentNode != document.body) {
+                  window.modelContainer = model.parentNode;
+                  model.parentNode = document.body;
                 } else {
-                  model.style.width = \"initial\";
-                  model.style.height = \"initial\";
-                  model.style.position = \"initial\";
-                }
-                if (BABYLON) {
-                  BABYLON.Engine.resize();
+                  model.parentNode = window.modelContainer;
                 }'>[+]</a><br/>
               <div id='compass_box'><div id='compass'><b style='color:blue;'>◅</b>𝍠<b style='color:red;'>▻</b></div></div>
             """)