Basically  translate and rotate your sheet so that the fold line lies along the x axis.Subtract one side of the sheet and then rotate what is left around the x axis
Now put the bit you subtracted back and rotate and translate your sheet back to where it was.
Bassically it's a sheet bending machine :)

On Saturday, 1 October 2022 at 14:51:56 BST, Kevin Toppenberg <kdtop3@gmail.com> wrote:  

This is interesting.  Thanks for the link
I'll have to study it more
Kevin

On Thu, Sep 29, 2022 at 7:01 AM Andy Little via Discuss discuss@lists.openscad.org wrote:

---------- Forwarded message ----------
From: Andy Little kwikius@yahoo.com
To: OpenSCAD general discussion discuss@lists.openscad.org
Cc: 
Bcc: 
Date: Thu, 29 Sep 2022 11:01:05 +0000 (UTC)
Subject: [OpenSCAD] Re: OpenSCAD sheet metal origami?
Here is an alternative way, recursive fold...
Folding a sheet material in OpenSCAD

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Folding a sheet material in OpenSCAD

Folding a sheet material in OpenSCAD. GitHub Gist: instantly share code, notes, and snippets.
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On Thursday, 22 September 2022 at 03:58:43 BST, Kevin Toppenberg <kdtop3@gmail.com> wrote:  

Joe, thank you for the offer.  Let's see if I can do it in OpenSCAD.:-)
Kevin

On Wed, Sep 21, 2022 at 8:15 PM Joe Greene volgclawtooth@gmail.com wrote:

Bah silly phone..  I meant to add I am no Montroll, but have been doing origami since the mid  1980's and have designed a few such patterns
On Wed, Sep 21, 2022, 19:09 Joe Greene volgclawtooth@gmail.com wrote:

I don't know about an app that'd do the unwrap but if you sent me a model I can manially unwrap it in say Blender and send you back a pattern
On Wed, Sep 21, 2022, 06:36 Kevin Toppenberg kdtop3@gmail.com wrote:

Hey all,
I often use OpenSCAD to generate models as patterns for real-life objects I plan to make.  I am currently needing to make something out of sheet metal, and the shape will be mildly complicated:  It will be a chip-catching pan to attach to a metal-cutting lathe.  I can't find any sample pictures, but imagine a wall about 3 feet tall behind the lathe and then folding around under the lathe in a sort of half-shell manner.

I am certain that OpenSCAD can be used to make such models and to then "unfold" them to get a flat pattern which would then be copied to the real piece of sheet metal.  But I am wondering if anyone has done this before?  Has anyone made a library and figured out the best way to generalize this problem? 

This YoutTube video (https://www.youtube.com/watch?v=fWG-FPWj8JU) shows how Fusion360 provides this feature.  I just skimmed the video so I didn't get too deep into its details. 

Any thoughts?
ThanksKevin

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---------- Forwarded message ----------
From: Andy Little via Discuss discuss@lists.openscad.org
To: OpenSCAD general discussion discuss@lists.openscad.org
Cc: Andy Little kwikius@yahoo.com
Bcc: 
Date: Thu, 29 Sep 2022 11:01:05 +0000 (UTC)
Subject: [OpenSCAD] Re: OpenSCAD sheet metal origami?

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I just realised that I changed the code so to use ModuleLiterals.https://en.wikibooks.org/w/index.php?title=OpenSCAD_User_Manual/WIP/Module_Literals You could download and build ModuleLiterals fork
"https://github.com/kwikius/openscad/tree/module_literal_v3"
 or change the code back to use traditional modules:
m = module {...} goes back to module m(){..} etc

On Saturday, 1 October 2022 at 14:51:56 BST, Kevin Toppenberg <kdtop3@gmail.com> wrote:  

This is interesting.  Thanks for the link
I'll have to study it more
Kevin

On Thu, Sep 29, 2022 at 7:01 AM Andy Little via Discuss discuss@lists.openscad.org wrote:

---------- Forwarded message ----------
From: Andy Little kwikius@yahoo.com
To: OpenSCAD general discussion discuss@lists.openscad.org
Cc: 
Bcc: 
Date: Thu, 29 Sep 2022 11:01:05 +0000 (UTC)
Subject: [OpenSCAD] Re: OpenSCAD sheet metal origami?
Here is an alternative way, recursive fold...
Folding a sheet material in OpenSCAD

|
|
|
|  |  |

|

|
|
|  |
Folding a sheet material in OpenSCAD

Folding a sheet material in OpenSCAD. GitHub Gist: instantly share code, notes, and snippets.
|

|

|

On Thursday, 22 September 2022 at 03:58:43 BST, Kevin Toppenberg <kdtop3@gmail.com> wrote:  

Joe, thank you for the offer.  Let's see if I can do it in OpenSCAD.:-)
Kevin

On Wed, Sep 21, 2022 at 8:15 PM Joe Greene volgclawtooth@gmail.com wrote:

Bah silly phone..  I meant to add I am no Montroll, but have been doing origami since the mid  1980's and have designed a few such patterns
On Wed, Sep 21, 2022, 19:09 Joe Greene volgclawtooth@gmail.com wrote:

I don't know about an app that'd do the unwrap but if you sent me a model I can manially unwrap it in say Blender and send you back a pattern
On Wed, Sep 21, 2022, 06:36 Kevin Toppenberg kdtop3@gmail.com wrote:

Hey all,
I often use OpenSCAD to generate models as patterns for real-life objects I plan to make.  I am currently needing to make something out of sheet metal, and the shape will be mildly complicated:  It will be a chip-catching pan to attach to a metal-cutting lathe.  I can't find any sample pictures, but imagine a wall about 3 feet tall behind the lathe and then folding around under the lathe in a sort of half-shell manner.

I am certain that OpenSCAD can be used to make such models and to then "unfold" them to get a flat pattern which would then be copied to the real piece of sheet metal.  But I am wondering if anyone has done this before?  Has anyone made a library and figured out the best way to generalize this problem? 

This YoutTube video (https://www.youtube.com/watch?v=fWG-FPWj8JU) shows how Fusion360 provides this feature.  I just skimmed the video so I didn't get too deep into its details. 

Any thoughts?
ThanksKevin

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

OpenSCAD mailing list
To unsubscribe send an email to discuss-leave@lists.openscad.org

---------- Forwarded message ----------
From: Andy Little via Discuss discuss@lists.openscad.org
To: OpenSCAD general discussion discuss@lists.openscad.org
Cc: Andy Little kwikius@yahoo.com
Bcc: 
Date: Thu, 29 Sep 2022 11:01:05 +0000 (UTC)
Subject: [OpenSCAD] Re: OpenSCAD sheet metal origami?

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To unsubscribe send an email to discuss-leave@lists.openscad.org

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To unsubscribe send an email to discuss-leave@lists.openscad.org