Mesh intersection with Plane gives "Points are likely coincident" error

Geometry
1

Hi everyone,

I have a Mesh of a tunnel, exported and created in CloudCompare.
I would like to use this Mesh in Dynamo and extract PolyCurves at Cross Sections.
However when I try the following workflow (seen in Screenshot) I get the “Points are likely coincident” error.

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image2089×923 84.6 KB

If anyone has any ideas to overcome this problem please let me know!

2

Hi @Daan Are you able to post a sample file for the mesh output from CC?

3

It might be easier to generate the curves at cross sections in Cloudcompare

The point cloud sectioning tools in CC are pretty good
https://www.cloudcompare.org/doc/wiki/index.php?title=Extract_Sections

You could loft these curves- in Dynamo or other applications

4

HI @Ewan_Opie & @Andrew_Hannell ,

Thanks for the feedback and suggestions!
I uploaded two CloudCompare Meshes to WeTransfer with an Octree Depth of 11 and 12 respectively:

Octree Depth 11 Mesh:

image
image1551×890 75.9 KB

I also had a go at the Workflow suggested by Andrew, however since these PolyLines are generated straight from the Point Cloud the results are not great, see image below:

image
image1468×786 23.7 KB

(For context, i need the point at the vertices of the PolyLines)

I haven’t found a way yet to create these Cross Sections in CloudCompare together with the Mesh.

PS: Here is also my .dyn file from the first post:
Mesh to Dynamo Test.dyn (37.8 KB)