using THREE.Math.degToRad instead of inline math

js/main.js

@@ -209,7 +209,7 @@ function update() {
         camera.focusTarget.add(vector);
     }
 
-    var rotation = 6 * (Math.PI / 180);
+    var rotation = THREE.Math.degToRad(6);
 
     let cameraOffset = new THREE.Vector3(camera.offset.x, camera.offset.y, camera.offset.z);
     if (keys[KeyCode.Q]) {