# Reflect & Glyph, how to add vectors at the symmetry plane

**URL:** https://discourse.paraview.org/t/reflect-glyph-how-to-add-vectors-at-the-symmetry-plane/10135
**Category:** ParaView Support
**Created:** [August 11, 2022, 1:14pm UTC](https://discourse.paraview.org/t/reflect-glyph-how-to-add-vectors-at-the-symmetry-plane/10135 "2022-08-11T13:14:52Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![rcontinuum](https://discourse.paraview.org/user_avatar/discourse.paraview.org/rcontinuum/32/8172_2.png) [@rcontinuum](https://discourse.paraview.org/u/rcontinuum)
#### Post date: [August 11, 2022, 1:14pm UTC](https://discourse.paraview.org/t/reflect-glyph-how-to-add-vectors-at-the-symmetry-plane/10135/1 "2022-08-11T13:14:52Z")

</div>

Hello,

I have a small mesh with two cells. And some vector data at the points (nodes). I use `Reader->Glyph` to get the left figure.  
Now for this mesh and the vector data `Y Min` is a symmetry plane. Thus, I use `Reflect`, more specific `Reader->Reflect->Glyph` and get the right figure.

 ![reflect_glyph_crop](https://discourse.paraview.org/uploads/default/original/2X/4/4eb19c54de573b6fd5178f35c914ce5fcce3b975.png)

Now, this is not what I want as also the vectors got reflected at the symmetry plane. At the three horizontal points/nodes in the center I would like to have only one vector at each node. That one vector at each node should be the sum of the two depicted vectors at each horizontal middle node. I tried to apply `Merge Blocks` but it didn’t help.

How would I do?