<![CDATA[3d to 2d]]>Anyone have any suggestions on how i can go from an extruded shape back to 2d, like how i can make an extruded cylinder back to a circle? I'm asking since I'm trying to generate .svg files.

]]>https://openjscad.nodebb.com/topic/189/3d-to-2dRSS for NodeMon, 05 Oct 2026 18:38:55 GMTTue, 27 Oct 2020 01:04:17 GMT60<![CDATA[Reply to 3d to 2d on Thu, 03 Jun 2021 04:37:31 GMT]]>@Maria-Alzate Just for your information, as part of the last release, there's a new project() function which can project a 3D shape to a 2D shape.

]]>https://openjscad.nodebb.com/post/806https://openjscad.nodebb.com/post/806Thu, 03 Jun 2021 04:37:31 GMT<![CDATA[Reply to 3d to 2d on Fri, 30 Oct 2020 01:40:16 GMT]]>@z3dev oh ok good to know! Thank you!

]]>https://openjscad.nodebb.com/post/508https://openjscad.nodebb.com/post/508Fri, 30 Oct 2020 01:40:16 GMT<![CDATA[Reply to 3d to 2d on Thu, 29 Oct 2020 14:03:16 GMT]]>@gilboonet Thank you ! I will give this a try!

]]>https://openjscad.nodebb.com/post/505https://openjscad.nodebb.com/post/505Thu, 29 Oct 2020 14:03:16 GMT<![CDATA[Reply to 3d to 2d on Tue, 27 Oct 2020 12:24:49 GMT]]>I made a function (vol2surf) that returns a shape from a volume and an axis, but it's gross and wasn't fully tested. You'll maybe get a shape that needs winding reversal. code : https://github.com/gilboonet/gilboonet.github.io/blob/master/demos/gigi.js run : https://jscad.xyz/#https://raw.githubusercontent.com/gilboonet/gilboonet.github.io/master/demos/gigi.js

]]>https://openjscad.nodebb.com/post/502https://openjscad.nodebb.com/post/502Tue, 27 Oct 2020 12:24:49 GMT<![CDATA[Reply to 3d to 2d on Tue, 27 Oct 2020 06:26:58 GMT]]>@Maria-Alzate sadly, no.

there's a concept call 'projection', which projects the outlines of a 3D shape to a plane, which becomes basically 2D. this functionality has been requested several times over the years, but there has never been a implementation provided.

https://github.com/jscad/OpenJSCAD.org/issues/99

i think others are basically taking a very thin slice, converting the points into 2D, and creating a 2D shape from the points.

however, this doesn't work if there are holes in the 3D shape.

]]>https://openjscad.nodebb.com/post/501https://openjscad.nodebb.com/post/501Tue, 27 Oct 2020 06:26:58 GMT