# coordinate transformation problem

**URL:** https://discourse.paraview.org/t/coordinate-transformation-problem/193
**Category:** ParaView Support
**Created:** [June 16, 2018, 10:56pm UTC](https://discourse.paraview.org/t/coordinate-transformation-problem/193 "2018-06-16T22:56:37Z")
**Posts on this page:** 1
**Showing post:** 2

<div class="post-metadata">

### Author: ![dcthomp](https://discourse.paraview.org/user_avatar/discourse.paraview.org/dcthomp/32/20_2.png) [@dcthomp](https://discourse.paraview.org/u/dcthomp)
#### Post date: [June 17, 2018, 12:56pm UTC](https://discourse.paraview.org/t/coordinate-transformation-problem/193/2 "2018-06-17T12:56:28Z")

</div>

Multiblock datasets do not have a single set of points but rather a set of points for each block. You may either

- change your script to detect multiblocks and iterate over each block, transforming points for each dataset that inherits vtkPointSet or
- use the calculator filter with the “Coordinate Results” checkbox selected and a formula like `xCoord*sin(yCoord)*cos(zCoord)*iHat + ...`; the calculator filter automatically iterates over blocks for you.

The latter is simpler unless you need to perform additional processing.

---

_[View the full topic](https://discourse.paraview.org/t/coordinate-transformation-problem/193)._