Oct 2, 2016

z3dev

Ami Fischman
ETA: updated version linked from https://gist.github.com/fischman/287396e0593a7e083ad8ee85d945d668#flatteningunfolding-3d-into-2d

Inspired by +Gilbert Duval's unfolding projects I wrote an automated flattener. Interested to hear people's thoughts

http://openjscad.org/#https://gist.githubusercontent.com/fischman/2db39c62a5b7a73d28f2657d6af2e00d/raw/436c163d103a1284acd0195aedf043a0c250c902/flattener.jscad

(suggest reading the header comment before trying to use it)
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Ami Fischman
Are the starting triangles random for you?

Oct 26, 2016
Ami Fischman
+Gilbert Duval thanks for the feedback. Updated the posted version to:

allow scaling the model
split apart "polygons" into "triangles" in the input model
significantly speed up label generation by caching digit CAGs
add flaps to show what to connect to what
Adding flaps makes the whole thing much more computationally intensive on the renderer, so while e.g. heart/teddy/bowl take <2.5s in my code (main()), the overall rendering can take 10-15s as openjscad chews on the returned CAGs

LMK how this works out for you.

Nov 7, 2016
Ami Fischman
+Gilbert Duval sure, go for it. FYI you misspelled my last name in the credit (only one N, not two).

Nov 24, 2016
Ami Fischman
+Gilbert Duval since the long inline data for tdy and bowl was making it impossible to navigate the comments on this post in Android G+ I moved them to:
https://gist.github.com/fischman/5ee48cf3476a4b4e6b9318027d1f6e94 and https://gist.github.com/fischman/1bdfee31897b05c404042e76ee152b46 resp. I hope you don't mind.

Nov 24, 2016
Ami Fischman
+Laust Frederiksen the "Use areas instead of lines?" param checkbox is meant to be used this way - check the box to use areas and export SVG for the cut (outer boundary only) and then uncheck the box and export SVG for the crease lines (and use a different laser profile, obvs).
Note I haven't actually tried to execute this recipe, so I'd be happy to hear how well/poorly it works

Apr 12, 2017
Ami Fischman
+Laust Frederiksen sorry I'm not seeing what's wrong with 308/293. Can you say more about them?
The intent of getTransformToXY is to preserve normals. Can you repro a problem with a simpler/toy model?