Hi Frederick, does the "Construct > Curve > Silhouette" command generate the type of curve you want for this?

If not it would help if you could post an example file.

- Michael

Hi Michael,

Attached is the "work flow" I go through to make "old shaped holes based on the perimeter of another solid".

I hope it is clear the steps I take.

Thanks.

Frederick

Hi Frederick, if the "other solid" is always an extrusion like you show here then creating the closed perimeter curve is probably the easiest method.

If you want to do that with the least amount of steps set up a keyboard shortcut for Ctrl+L to have this:
script: moi.geometryDatabase.selectLoop();

Then select 2 adjacent edge curves on the top face:


Push Ctrl+L to extend selection to all the edges on the outer boundary of the top face:


Now use Edit > Join to make the closed boundary curve.

If you don't want to make a boundary curve I guess you could take the solid and stretch it vertically so it is is longer than the other solid and do a boolean difference with it.

- Michael

Hi Michael,

The selectLoop() function does most of the work for me.

Now I need to turn it into a custom command where I select the two edges and it does the selectLoop and then Joins the edges into a closed curve.

Moi is simply AMAZING!

Thanks much.

Frederick

Hi fcwilt,

The “ExtendEdgeSelection” script allows you to select all edges starting from a single edge on certain faces of solids or surfaces. It works for your part because it has no corners. For parts with corners, you can adjust the first parameter: “var angle_degrees = 20;” to suit your needs.
With the attached file, you can test the green part using the default value of 20.
Select the designated edge and run the script; this will select 3 edges. If you replace the value 20 with 90 (and save), you’ll select all the edges on the top face of the solid. You’ll need to close MoI and restart it for this to work. I use Notepad++
Well, Michael will explain all this more clearly than I can. I have very little knowledge of scripts, so I often work by trial and error.

Oops, I forgot the sample file
Warning! Translation from French using DeepL Pro