[OpenSCAD] Rounded Polygon

nop head nop.head at gmail.com
Fri May 3 12:07:46 EDT 2019


I would make the shape by a cylinder and two linear extrudes stacked on top
of each other. To round the divider I would use offset(r) offset(-2 * r)
offset(r). That leaves the dimension the same but rounds both internal an
external corners.

On Fri, 3 May 2019 at 16:55, William Adams <will.adams at frycomm.com> wrote:

> I'm hoping to eventually work up a general algorithm for subdividing an
> arbitrary shape/area so that it can then be cut out using macros/modules
> which I'll be defining in OpenSCAD (so as to have a 3D preview of a
> project) and in some other programming languages as well (METAPOST seems
> possible, Javascript/TPL (Tool Path Language) another, Python, or LiveCode
> distant possibilities.
>
> Basically I want to be able to have rounded ends on the dividers in:
>
>
> https://community.carbide3d.com/t/fitted-box-design-generator-underway/13437/2
>
> [image: cncboxfitted_3x3_round_divider.png]
>
> instead of the sharp points.
>
> William
>
>
>
> On Fri, May 3, 2019 at 11:32 AM adrianv <avm4 at cornell.edu> wrote:
>
>> Yes, what I meant by "teardrop" is an edge which combines 45 degrees of a
>> circular arc with a bevel at 45 deg so that the edge can be 3d printed
>> without support---with the bevel down there are no unsupported areas at
>> lower than a 45 deg angle.
>>
>>
>> William Adams-2 wrote
>> > Okay. Discussion of a list of two-dimensional shapes,
>> > mathematical/programmatic techniques for dividing shapes into regions,
>> and
>> > the possible shapes which one can use in such deconstruction.
>>
>> I really don't understand your question.  When people talk of dividing 2d
>> shapes into regions they usually mean triangulating the shape.  But it
>> sounds like you mean something else.  Maybe you should give a specific
>> example?
>>
>>
>>
>>
>> --
>> Sent from: http://forum.openscad.org/
>>
>> _______________________________________________
>> OpenSCAD mailing list
>> Discuss at lists.openscad.org
>> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>>
> _______________________________________________
> OpenSCAD mailing list
> Discuss at lists.openscad.org
> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscad.org/pipermail/discuss_lists.openscad.org/attachments/20190503/a0d2c0f6/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: cncboxfitted_3x3_round_divider.png
Type: image/png
Size: 45471 bytes
Desc: not available
URL: <http://lists.openscad.org/pipermail/discuss_lists.openscad.org/attachments/20190503/a0d2c0f6/attachment.png>


More information about the Discuss mailing list