5 ms·

Origami Simulator

233 points by parisianka 6y ago

jacksnipe 6y ago
Origami is so cool! https://www.eecs.mit.edu/news-events/announcements/computational-origami https://www.eecs.mit.edu/news-events/announcements/computati...
shanky23 6y ago
But can you actually make origami in it? I think not.
- mlvljr 6y ago
  u n0t a hax0r or wut ?
FriedPickles 6y ago
Origami theory seems far beyond its application. Is there any efficient way to construct these intricate patterns? Maybe something like a 3d printer for origami?
- plutonorm 6y ago
  I've spent a little time over the years thinking about how you could do this. I can't see a way!
- tonylemesmer 6y ago
  This guy recently trying using 3D printer to automate making foldable patterns: https://mobile.twitter.com/drew_makes/status/1318995754405535744 https://mobile.twitter.com/drew_makes/status/131899575440553...
saagarjha 6y ago
Hmm, I seem to have gotten the paper to intersect with itself…
- slx26 6y ago
  Paper torture simulator (coming soon the feature to rip it apart).
adamredwoods 6y ago
The 3d free-rotation for this view camera is a traditionally awkward way (in my opinion) for rotating. I've used different 3d modeling applications, few that do it this way, but I never liked it. I think the early Photoshop 3d viewport used this, but now does something else. Lightwave modeler always had one of the best free-rotation cameras. Off-hand, I don't remember what that rotation equation is to be most effective.
- jacobolus 6y ago
  I think this is the “virtual trackball” from this SIGGRAPH 1988 paper http://www.math.utah.edu/~palais/Links/Chen_Trackball_3-D_rotation.pdf http://www.math.utah.edu/~palais/Links/Chen_Trackball_3-D_ro... which I think was also the method described in Graphics Gems circa 1990. A mouse is in general a horrible input device for inputting arbitrary 3d rotations, because it doesn’t have enough degrees of freedom. By far the best tool is a 3-DOF trackball set up so that arbitrary rotations of the ball are directly converted into rotations in the computer. Next best is some other physical device with gyro/accelerometer so that (slightly less accurate but still) direct manipulation can be input. Next best after that is something with multitouch or perhaps one of those 6 DOF “space mouse” devices.
  - deleted 6y ago
    [deleted]
- jpab 6y ago
  For viewing objects I find a turntable style view best in most circumstances. For landscape or architecture (where you're in the scene), mouselook with WASD + vertical up/down. Neither of these control styles are 6dof; they don't provide a roll control, only elevation, azimuth and position. Roll is rarely useful IMHO and including it in the normal control scheme makes things hard to use. Put roll behind an explicit modifier key, and have a reset-roll action somewhere.
- layoutIfNeeded 6y ago
  Yes, the problem with this method is that the final orientation depends on the path you cursor takes, i.e. dragging up 100px and left 100px is different than dragging left 100px and up 100px... Of course, that's just the way 3D rotations work: SO(3) [1] is non-Abelian. However, doing this with an input device that has one too few degrees of freedom makes it very awkward to use. When you have a well-defined "ground" plane in your scene, then turntable-style rotation is the most intuitive, where horizontal dragging rotates around the ground plane's normal, while vertical dragging changes the azimuth angle. This makes the final orientation independent of the cursor's path, on the other hand, orientations where the ground plane would be skewed are unreachable. Some people swear on Ken Shoemake's ARCBALL [2] technique, but I personally found it less intuitive than the turntable method (although I might have implemented it incorrectly ¯\_(ツ)_/¯). [1] https://en.wikipedia.org/wiki/3D_rotation_group https://en.wikipedia.org/wiki/3D_rotation_group [2] https://tommyhinks.files.wordpress.com/2012/02/shoemake92_arcball.pdf https://tommyhinks.files.wordpress.com/2012/02/shoemake92_ar...
app4soft 6y ago
I found "Origami Editor 3D" desktop app very cool, but, sadly, it's development stalled since 2017.[0,1] [0] https://sourceforge.net/projects/origamieditor3d/ https://sourceforge.net/projects/origamieditor3d/ [1] https://github.com/bagyoni/origamieditor3d https://github.com/bagyoni/origamieditor3d
- bsza 6y ago
  oe3d dev here. I stopped because - the code became unmaintainable - apparently no one was using it for making origami (unintuitive UI?) - I found more interesting things to do (including my day job) It was a fun project but I don't want to return to it.
  - app4soft 6y ago
    > - apparently no one was using it for making origami (unintuitive UI?) I use it since 2015 & its UI is intuitive for me![0] Here is paper plane I built in Origami Editor 3D on March 4th 2017, just next day after v1.3.4 was released![1] Here is Twitter-thread covering Origami Editor 3D usage, posted by 'Piku' on May-June 2020.[2] [0] https://github.com/bagyoni/origamieditor3d/issues/1 https://github.com/bagyoni/origamieditor3d/issues/1 [1] https://twitter.com/app4soft/status/1320626850629095424 https://twitter.com/app4soft/status/1320626850629095424 [2] https://twitter.com/pikuotaku/status/1264568087048679424 https://twitter.com/pikuotaku/status/1264568087048679424
ravila4 6y ago
The strain visualization is very cool, and presents an interesting insight into activation energy, and the way proteins fold.
rasengan0 6y ago
Great job but for Examples/SimpleFolds/Russian Triangle had to go old skool physical media to understand what's going on https://youtu.be/nz1TMFyhqMs https://youtu.be/nz1TMFyhqMs
jojobas 6y ago
Computational origami was the subject of 2016 ICFP Contest. http://icfpc2016.blogspot.com/ http://icfpc2016.blogspot.com/ https://www.slideshare.net/nya3jp/icfp-programming-contest-2016-overview-random-inside-stories-66673821 https://www.slideshare.net/nya3jp/icfp-programming-contest-2...
H4sh3 6y ago
Very cool!
stevefan1999 6y ago
Also checkout Erik Demaine's work on computational folding & origami: https://erikdemaine.org/folding/ https://erikdemaine.org/folding/
Bluecobra 6y ago
I really hate it when websites don’t honor “Request Desktop Website”. There’s no good reason why this can’t be viewed on a modern iPhone/iPad.
fuzzythinker 6y ago
More discussed 2.5 years ago [1] when it's still just a page at https://amandaghassaei.com/ https://amandaghassaei.com/ (check out his other great works). [1] https://news.ycombinator.com/item?id=16374575 https://news.ycombinator.com/item?id=16374575
jamesmatthis 6y ago
Very nice work. I appreciate, because i did a lot of programming myself. https://blogingenieurs.com https://blogingenieurs.com

233 points by parisianka 6y ago

Origami is so cool! https://www.eecs.mit.edu/news-events/announcements/computational-origami https://www.eecs.mit.edu/news-events/announcements/computati...

shanky23 6y ago

But can you actually make origami in it? I think not.

mlvljr 6y ago
u n0t a hax0r or wut ?

FriedPickles 6y ago

Origami theory seems far beyond its application. Is there any efficient way to construct these intricate patterns? Maybe something like a 3d printer for origami?

plutonorm 6y ago
I've spent a little time over the years thinking about how you could do this. I can't see a way!
tonylemesmer 6y ago
This guy recently trying using 3D printer to automate making foldable patterns: https://mobile.twitter.com/drew_makes/status/1318995754405535744 https://mobile.twitter.com/drew_makes/status/131899575440553...

saagarjha 6y ago

Hmm, I seem to have gotten the paper to intersect with itself…

slx26 6y ago
Paper torture simulator (coming soon the feature to rip it apart).

adamredwoods 6y ago

The 3d free-rotation for this view camera is a traditionally awkward way (in my opinion) for rotating. I've used different 3d modeling applications, few that do it this way, but I never liked it. I think the early Photoshop 3d viewport used this, but now does something else. Lightwave modeler always had one of the best free-rotation cameras. Off-hand, I don't remember what that rotation equation is to be most effective.

jacobolus 6y ago
I think this is the “virtual trackball” from this SIGGRAPH 1988 paper http://www.math.utah.edu/~palais/Links/Chen_Trackball_3-D_rotation.pdf http://www.math.utah.edu/~palais/Links/Chen_Trackball_3-D_ro... which I think was also the method described in Graphics Gems circa 1990. A mouse is in general a horrible input device for inputting arbitrary 3d rotations, because it doesn’t have enough degrees of freedom. By far the best tool is a 3-DOF trackball set up so that arbitrary rotations of the ball are directly converted into rotations in the computer. Next best is some other physical device with gyro/accelerometer so that (slightly less accurate but still) direct manipulation can be input. Next best after that is something with multitouch or perhaps one of those 6 DOF “space mouse” devices.
- deleted 6y ago
  [deleted]
jpab 6y ago
For viewing objects I find a turntable style view best in most circumstances. For landscape or architecture (where you're in the scene), mouselook with WASD + vertical up/down. Neither of these control styles are 6dof; they don't provide a roll control, only elevation, azimuth and position. Roll is rarely useful IMHO and including it in the normal control scheme makes things hard to use. Put roll behind an explicit modifier key, and have a reset-roll action somewhere.
layoutIfNeeded 6y ago
Yes, the problem with this method is that the final orientation depends on the path you cursor takes, i.e. dragging up 100px and left 100px is different than dragging left 100px and up 100px... Of course, that's just the way 3D rotations work: SO(3) [1] is non-Abelian. However, doing this with an input device that has one too few degrees of freedom makes it very awkward to use. When you have a well-defined "ground" plane in your scene, then turntable-style rotation is the most intuitive, where horizontal dragging rotates around the ground plane's normal, while vertical dragging changes the azimuth angle. This makes the final orientation independent of the cursor's path, on the other hand, orientations where the ground plane would be skewed are unreachable. Some people swear on Ken Shoemake's ARCBALL [2] technique, but I personally found it less intuitive than the turntable method (although I might have implemented it incorrectly ¯\_(ツ)_/¯). [1] https://en.wikipedia.org/wiki/3D_rotation_group https://en.wikipedia.org/wiki/3D_rotation_group [2] https://tommyhinks.files.wordpress.com/2012/02/shoemake92_arcball.pdf https://tommyhinks.files.wordpress.com/2012/02/shoemake92_ar...

app4soft 6y ago

I found "Origami Editor 3D" desktop app very cool, but, sadly, it's development stalled since 2017.[0,1] [0] https://sourceforge.net/projects/origamieditor3d/ https://sourceforge.net/projects/origamieditor3d/ [1] https://github.com/bagyoni/origamieditor3d https://github.com/bagyoni/origamieditor3d

bsza 6y ago
oe3d dev here. I stopped because - the code became unmaintainable - apparently no one was using it for making origami (unintuitive UI?) - I found more interesting things to do (including my day job) It was a fun project but I don't want to return to it.
- app4soft 6y ago
  > - apparently no one was using it for making origami (unintuitive UI?) I use it since 2015 & its UI is intuitive for me![0] Here is paper plane I built in Origami Editor 3D on March 4th 2017, just next day after v1.3.4 was released![1] Here is Twitter-thread covering Origami Editor 3D usage, posted by 'Piku' on May-June 2020.[2] [0] https://github.com/bagyoni/origamieditor3d/issues/1 https://github.com/bagyoni/origamieditor3d/issues/1 [1] https://twitter.com/app4soft/status/1320626850629095424 https://twitter.com/app4soft/status/1320626850629095424 [2] https://twitter.com/pikuotaku/status/1264568087048679424 https://twitter.com/pikuotaku/status/1264568087048679424

ravila4 6y ago

The strain visualization is very cool, and presents an interesting insight into activation energy, and the way proteins fold.

rasengan0 6y ago

Great job but for Examples/SimpleFolds/Russian Triangle had to go old skool physical media to understand what's going on https://youtu.be/nz1TMFyhqMs https://youtu.be/nz1TMFyhqMs

jojobas 6y ago

Computational origami was the subject of 2016 ICFP Contest. http://icfpc2016.blogspot.com/ http://icfpc2016.blogspot.com/ https://www.slideshare.net/nya3jp/icfp-programming-contest-2016-overview-random-inside-stories-66673821 https://www.slideshare.net/nya3jp/icfp-programming-contest-2...

H4sh3 6y ago

Very cool!

stevefan1999 6y ago

Also checkout Erik Demaine's work on computational folding & origami: https://erikdemaine.org/folding/ https://erikdemaine.org/folding/

Bluecobra 6y ago

I really hate it when websites don’t honor “Request Desktop Website”. There’s no good reason why this can’t be viewed on a modern iPhone/iPad.

fuzzythinker 6y ago

More discussed 2.5 years ago [1] when it's still just a page at https://amandaghassaei.com/ https://amandaghassaei.com/ (check out his other great works). [1] https://news.ycombinator.com/item?id=16374575 https://news.ycombinator.com/item?id=16374575

jamesmatthis 6y ago

Very nice work. I appreciate, because i did a lot of programming myself. https://blogingenieurs.com https://blogingenieurs.com