Update orbit-camera.js

orbit-camera.js

@@ -77,7 +77,7 @@ OrbitCamera.prototype.update = function (dt) {
 
     var position = new pc.Vec3();
     position.copy(this._pivotPoint);
-    position.addScaledVector(forward, -this._distance);
+    position.add(forward.clone().scale(-this._distance)); // <-- Fixed line
 
     // 3. If Y would be below minY, clamp pitch upward to keep Y >= minY
     var minY = this.minY;
@@ -96,7 +96,7 @@ OrbitCamera.prototype.update = function (dt) {
         quat.setFromEulerAngles(this._pitch, this._yaw, 0);
         quat.transformVector(pc.Vec3.FORWARD, forward);
         position.copy(this._pivotPoint);
-        position.addScaledVector(forward, -this._distance);
+        position.add(forward.clone().scale(-this._distance));
 
         if (position.y < minY) position.y = minY;
     }