# Displaying "piercing points" of multiple 3D polylines onto a (corrugated) plane

**URL:** https://discourse.paraview.org/t/displaying-piercing-points-of-multiple-3d-polylines-onto-a-corrugated-plane/1545
**Category:** ParaView Support
**Created:** [March 27, 2019, 9:15pm UTC](https://discourse.paraview.org/t/displaying-piercing-points-of-multiple-3d-polylines-onto-a-corrugated-plane/1545 "2019-03-27T21:15:40Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Frank\_Horowitz](https://discourse.paraview.org/user_avatar/discourse.paraview.org/frank_horowitz/32/1232_2.png) [@Frank\_Horowitz](https://discourse.paraview.org/u/Frank_Horowitz)
#### Post date: [March 27, 2019, 9:15pm UTC](https://discourse.paraview.org/t/displaying-piercing-points-of-multiple-3d-polylines-onto-a-corrugated-plane/1545/1 "2019-03-27T21:15:40Z")

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Hi All,

I’m trying to perform a geophysical display of _where_ sets of poly-lines (imported as VTK files generated from custom software) intersect the (local) plane defined by portion of a SEG-Y seismic section.

Some (perhaps) simplifying aspects of the relevant geometry: the polylines exist on horizontal depth “slices” so are perpendicular to the Z axis with arbitrary azimuths (structural geologists call that “trend” with zero “plunge”), and the seismic section is parallel to the Z axis, again with arbitrary – and locally varying – azimuth (structural geologists call that local “strike”, with vertical dip).

Is there any tool or combination of tools in PV (or VTK; preferably accessible with PyVTK) that can accomplish this task?

Many thanks for any help you can provide!!!