# Curtain walls/Panels Normal vector direction

**URL:** <https://forum.dynamobim.com/t/curtain-walls-panels-normal-vector-direction/10502>\
**Category:** Revit\
**Tags:** revit\
**Created:** [March 22, 2017, 4:36am UTC](https://forum.dynamobim.com/t/curtain-walls-panels-normal-vector-direction/10502 "2017-03-22T04:36:13Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![segatakieddine](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/segatakieddine/32/139676_2.png) [@segatakieddine](https://forum.dynamobim.com/u/segatakieddine)\
**Post date:** [March 22, 2017, 4:36am UTC](https://forum.dynamobim.com/t/curtain-walls-panels-normal-vector-direction/10502/1 "2017-03-22T04:36:13Z")

</div>

Please any method to detect the normal vector of [Curtain walls] or [Curtain walls panels] for orientation purpose ?  
i tried “Wall Orientation” node. but the problem is this node can detect only one direction of the normal vector. i mean when i invert the normal direction using Revit the output remain the same !

 ![](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/d/5d7c401337da7418fd8f8321db8b00634f3b037d.jpg)  
Thx