(I honestly am baffled that things like this have to be said.)
If you're concerned about people modifying a document after you share it out, consider using a digital signature or a hash.
You may find users who get mad if your settings are too aggressive though, and if they're unable to get a signature that they approve of.
And apparently without asking any permissions on the phone. What sorcery is this?
The dragging behavior is so intuitive – it's funny because usually if you create this kind of resistance in a UI it can be confusing, but in this context it works so well.
it's actually intuitive because it mimics a real life physical dragging of an object by a rope, which most people have a feel for. Skeuomorphism can be quite intuitive imho.
But this UI is much better at, e.g. drawing a smooth, symmetrical heart symbol, with a crisp turn.
Different UI for different tasks, and it’s very cool to see something that intuitively lets you control something that is normally hidden under your finger.
Friction: 0.04
Brush radius: 13
-> clear
-> draw your signature
Perfect freehand is the right way to solve this.
I wonder what Duo Lingo are using behind the scenes. I've been busy with the Chinese and Japanese courses, and one thing I quickly noticed is how there are two different 'grades' of practising drawing hanzi/kana: when you first learn how to write it (with your finger, in the app) it constrains your movements so they perfectly follow the guidelines. But then later, it relaxes the constraints totally, or almost totally, so your hiragana can really be a shorthand squiggle. They then assess it quite liberally too, so as long as the general gist is correct, your kana will pass -- but it's also easy to fail it if you're just guessing.
There's even a program called Lazy Nezumi that adds global mouse smoothing, rulers etc. to Windows.
It’s ~20 commits done in two batches. 2018 for the initial release then some more work on it in 2023.
Zastai: you could have that kind of progress on any lib you wish to release, and it’s a nice feeling to have something out in the wild.
https://en.wikipedia.org/wiki/Direct_manipulation_interface
It reminds me of artist/engineer's Paul Haeberli's legendary and monumentally influential "DynaDraw" which he wrote at SGI.
DynaDraw: A Dynamic Drawing Technique (June 1989):
https://web.archive.org/web/19970605062552/http://www.sgi.co...
>Here's a really fun and useful hack.
>The program Dynadraw implements a dynamic drawing technique that applies a simple filter to mouse positions. Here the brush is modeled as a physical object with mass, velocity and friction. The mouse pulls on the brush with a synthetic rubber band. By changing the amount of friction and mass, various kinds of strokes can be made. This kind of dynamic filtering makes it easy to create smooth, consistent calligraphic strokes.
>The C source for the dynadraw demo program is available. You can save this onto your IRIS, compile it, and give it a try. If you're a Mac or PC hacker, you might be able to port this program easily to your own platform.
Source Code (for SGI GL):
https://web.archive.org/web/19970727185417/http://www.sgi.co...
Lots more great stuff from Paul Haeberli on his "Graphica Obscura" page:
https://web.archive.org/web/19970706205455/http://www.sgi.co...
https://en.wikipedia.org/wiki/Paul_Haeberli
He inspired another artist/engineer Golan Levin to write an implementation of DynaDraw with Processing and p5.js:
https://editor.p5js.org/golan/sketches/cZPRgx6q9
// This is a rudimentary p5.js 'port' of Paul Haeberli's
// legendary and monumentally influential program "Dynadraw",
// which is described at: http://www.sgi.com/grafica/dyna/index.html
// Originally created in June 1989 by Paul Haeberli (@GraficaObscura)
// Ported to Processing January 2004 by Golan Levin (@golan)
// Ported to p5.js September 2021 by Golan Levin.
http://www.flong.com/archive/index.html
https://en.wikipedia.org/wiki/Golan_Levin
I love his Double-Taker (Snout) (2008):
http://www.flong.com/archive/projects/snout/index.html
He explained that and more in this Ted talk "Golan Levin makes art that looks back at you":
https://www.youtube.com/watch?v=1G0MzlfMPuM
>As Joy Mountford once said, "The mouse is probably the narrowest straw you could try to suck all of human expressions through."
https://en.wikipedia.org/wiki/Joy_Mountford
I also love "Rouen Revisited" (1996)̀, a "monumental" architectural visualization that Golan Levin and another artist/engineer Paul Debevec collaborated on at Interval Research Labs, which led to Paul's later work at USC:
http://www.flong.com/archive/projects/rouen/index.html
Paul Debevec teaches and researches at USC and Eyeline Studios (powered by Netflix):
https://en.wikipedia.org/wiki/Paul_Debevec
Paul Debevec's "Light Stage" was featured in The Congress (2013), in the dramatically riveting and technically accurate scan scene:
https://www.youtube.com/watch?v=pPAl5GwvdY8
More links:
Haeberli used a simple simulation of Hookes law, Where F=-kx F is the force applied to the spring. k is spring constant or stiffness. x is extension distance.
DynaDraw also added damping IIRC
Thx for the links