Feature request thin element for Part and PartDesign workbench

[onekk]

Such a hypothetical "Thickness2D" could be similar to Part Offset2D, but producing not only one offset, but two: one on each side of the referenced lines.

Yes and No, it depends, on whta you are trying to do.

Usually using offset you are otaining different shapes as offset tend to make things using some math behind that make

This code:

Code: Select all

def wire_shape():
    pol_r = (
        (000.0, 00.0, 0.0),
        (135.0, 00.0, 0.0),
        (135.0, 48.4, 0.0),
        (131.0, 54.3, 0.0),
        (105.1, 56.6, 0.0),
        (070.0, 58.5, 0.0),
        (053.3, 59.4, 0.0),
        (025.8, 82.0, 0.0),
        (002.8, 82.0, 0.0),
        (000.0, 67.2, 0.0),
        (000.0, 00.0, 0.0)
    )

    rim_profile = Part.makePolygon(pol_r)
    # Part.show(rim_profile, "rim_profile")
    return rim_profile

obj = wire_shape()

Part.show(obj, "original_wire")

o_off = 1.5

obj1 = obj.makeOffset2D(o_off * -1)

Part.show(obj1, "neg_off_wire")

obj2 = obj.makeOffset2D(o_off)

Will result in this shape (one corner shown):

offset_1.png (5.99 KiB) Viewed 970 times

maybe this is what you want, maybe not.

Using GUI Offset2D could use a different strategy to offset corners, when I've used it on my "original_wire" polygon, using mode=Pipe, join=Tangent.

I obtain:

off_gui.png (7.24 KiB) Viewed 970 times

At least in FreeCAD 0.20, Libs: 0.20R26720 (Git).

What is correct, for me GUI way is more correct, but makeOffset2D method is more coherent from what I was used in other CAD/CAM as on a corner the "correct" constant distance is a radius, like when cutting with a cnc.

This pose a question? How to achieve this behaviour with Scripting?

Sorry for some OT parts.

Regards

Carlo D.

[freecad-heini-1]

issue #0004334

Friendly reminder of this feature request
"thicken a sketch". Thank you

Is there anything new about this yet?

[FBXL5]

I'd like to have such a tool in PartDesign, too. I still use SheetMetal_AddBase as a workaround, as long as I can live with its automatically inserted radii.

[kadet]

I've created new issue: https://github.com/FreeCAD/FreeCAD/issues/10538 in the comment is my initial idea for how this feature could be implemented, based on simple experiments with API and FreeCAD. Feel free to share your thoughts.

Side note: Technically there already is imported issue based on #0004334: https://github.com/FreeCAD/FreeCAD/issues/6057, but it's old, has no real description and because of that is neither informational or discoverable. Personally I'd suggest to close it as duplicate of mine which should be more discoverable.