Update app.py

app.py

@@ -618,8 +618,11 @@ with gr.Blocks(css=css) as demo:
                   if (BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1].rotationQuaternion) {
                     BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1].rotationQuaternion = null;
                   }
-                  BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1].position.z = (event.clientX-this.getBoundingClientRect().x-parseInt(this.style.width)/2) * Math.cos(BABYLON.Engine.LastCreatedScene.activeCamera.alpha);
-                  BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1].position.x = (event.clientY-this.getBoundingClientRect().y-parseInt(this.style.height)/2) * Math.sin(BABYLON.Engine.LastCreatedScene.activeCamera.alpha);
+                  const dir = BABYLON.Engine.LastCreatedScene.activeCamera.getForwardRay().direction;
+                  dir.y = 0; dir.normalize();
+                  const angle = BABYLON.Vector3.GetAngleBetweenVectors(dir, BABYLON.Vector3.Forward(), BABYLON.Vector3.Up());
+                  BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1].position.z = (event.clientX-this.getBoundingClientRect().x-parseInt(this.style.width)/2) * Math.cos(-angle);
+                  BABYLON.Engine.LastCreatedScene.getNodes()[parseInt(document.getElementById(\"fnum\").getElementsByTagName(\"input\")[0].value)+1].position.x = (event.clientY-this.getBoundingClientRect().y-parseInt(this.style.height)/2) * Math.sin(-angle);
                 }
                 } catch(e) {alert(e)}
                 ' onkeydown='