Mesh clipping along a plane

[Issam-Codde]

Hello every body,
First thanks for the great library!
I would like to ask if anyone knows how to get the intersection points between the plane and the mesh or change their color. I know that by using this function (clip_plane()) the intersaction between mesh and plane is saved in a new mesh. but is ther any direkt methods to get the Points too.
And
If the mesh was watertight before, how can i close it again afterwards?
i tried the Funktion fill_holes() with hole_size: float = 100000000 but unfortunately the mesh remains open. is there any other Methods ?