I currently could use a function that would return a 2D object from the intersection of a 3D object and a 2D object.

For my application, 2D object which is the shadow of a 3D object on a plane would also work.

Alternatively if linear_extrude() could use a 3D object instead of a 2D object, that would also work.

So far, I have not yet been able to figure out a solution to achieve any of those.

Perhaps
https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/3D_to_2D_Projection

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I think what you want is to enclose your 3D object in projection(cut =
true), then intersect that projection with your 2D object.

On September 3, 2020 at 18:47:32, Douglas Peale (douglas_peale@comcast.net)
wrote:

I currently could use a function that would return a 2D object from the
intersection of a 3D object and a 2D object.

For my application, 2D object which is the shadow of a 3D object on a plane
would also work.

Alternatively if linear_extrude() could use a 3D object instead of a 2D
object, that would also work.

So far, I have not yet been able to figure out a solution to achieve any of
those.

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Perhaps this will help:  https://www.thingiverse.com/tag:bltouch_mount

Narrower search:
https://www.thingiverse.com/search?q=bltouch+openscad&type=things&sort
=relevant
or
https://tinyurl.com/y38w9msa