# Ray box intersection in a Programmable filter

**URL:** https://discourse.paraview.org/t/ray-box-intersection-in-a-programmable-filter/4397
**Category:** ParaView Support
**Created:** [May 23, 2020, 5:35pm UTC](https://discourse.paraview.org/t/ray-box-intersection-in-a-programmable-filter/4397 "2020-05-23T17:35:13Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![dutta-alankar](https://discourse.paraview.org/user_avatar/discourse.paraview.org/dutta-alankar/32/13310_2.png) [@dutta-alankar](https://discourse.paraview.org/u/dutta-alankar)
#### Post date: [May 23, 2020, 5:35pm UTC](https://discourse.paraview.org/t/ray-box-intersection-in-a-programmable-filter/4397/1 "2020-05-23T17:35:13Z")

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I am building a programmable filter on CellData. In the filter, I need to find intersection between rays and cells. Is there a ready-made code using VTK with python wrapping that I can make use of for this?