# Intersection between two 3D meshes

**URL:** https://discourse.vtk.org/t/intersection-between-two-3d-meshes/12455
**Category:** Support
**Created:** [October 9, 2023, 3:06pm UTC](https://discourse.vtk.org/t/intersection-between-two-3d-meshes/12455 "2023-10-09T15:06:47Z")
**Posts on this page:** 3
**Page:** 1

<div class="post-metadata">

### Author: ![Carlos\_Montilla](https://discourse.vtk.org/user_avatar/discourse.vtk.org/carlos_montilla/32/7808_2.png) [@Carlos\_Montilla](https://discourse.vtk.org/u/Carlos_Montilla)
#### Post date: [October 9, 2023, 3:06pm UTC](https://discourse.vtk.org/t/intersection-between-two-3d-meshes/12455/1 "2023-10-09T15:06:47Z")

</div>

Hello developers.

I’m new to VTK and I have a question regarding the intersection between two 3-dimensional volume meshes.

What I would like to do is to take 2 different 3D meshes, coming from a fluid dynamics simulation and to compute the intersection between the two. i.e. the geometric 3D space commonly shared by both meshes. Is there any way of doing this with VTK?

I would also like to perform the same kind of operation but between a volumetric 3D mesh and a surface 3D mesh.

Any suggestion?

Thank you in advance for you help

---

<div class="post-metadata">

### Author: ![mwestphal](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mwestphal/32/19_2.png) [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [October 9, 2023, 3:10pm UTC](https://discourse.vtk.org/t/intersection-between-two-3d-meshes/12455/2 "2023-10-09T15:10:03Z")

</div>

@Charles_Gueunet

---

<div class="post-metadata">

### Author: ![rexthor](https://discourse.vtk.org/user_avatar/discourse.vtk.org/rexthor/32/6481_2.png) [@rexthor](https://discourse.vtk.org/u/rexthor)
#### Post date: [October 9, 2023, 3:13pm UTC](https://discourse.vtk.org/t/intersection-between-two-3d-meshes/12455/3 "2023-10-09T15:13:28Z")

</div>

Some posts from this site that may help:

- [Intersection of 3D mesh with polydata (return only intersecting mesh region)](https://discourse.vtk.org/t/intersection-of-3d-mesh-with-polydata-return-only-intersecting-mesh-region/4747)
- [Compute the volume of the intersection between two vtkPolyData objects](https://discourse.vtk.org/t/compute-the-volume-of-the-intersection-between-two-vtkpolydata-objects/8338)

Elsewhere:

- [[vtkusers] How to compute intersection between surface polydata in vtk?](https://vtkusers.public.kitware.narkive.com/bdeas1Mu/how-to-compute-intersection-between-surface-polydata-in-vtk)