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andy_matuschak's profile
Andy Matuschak
Andy Matuschak
Andy Matuschak
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@andy_matuschak

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Andy MatuschakVerified account

@andy_matuschak

Wonder, blunder, salve, solve! Working on tools that expand what people can think and do. Past: led R&D @KhanAcademy; helped build iOS @Apple.

San Francisco, CA
andymatuschak.org
Joined November 2007

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    1. Rasmus Andersson‏ @rsms Apr 24
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      As a little side project this week I’ve put together a simple playground for learning about input pointer latency in web browsers and experimenting with the idea of using path prediction, as demonstrated in this video. Play here: https://rsms.me/pointer-latency/ …pic.twitter.com/FblsI4YulR

      16 replies 35 retweets 446 likes
      Show this thread
    2. Koen Bok‏ @koenbok Apr 25
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      Replying to @rsms

      How do you think about the philosophy of pointer prediction as in; however good you get, you'll never get good at predicting when a user decides to stop and do something (that's like predicting the stock market) unless you can also predict intent based on task context.

      3 replies 0 retweets 4 likes
    3. Rasmus Andersson‏ @rsms Apr 25
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      Replying to @koenbok

      Totally! If you view source on the html you’ll find a function called onRest that is called in a variety of conditions to halt the prediction. Mainly when there has been an longer than usual period since input data.

      2 replies 0 retweets 2 likes
    4. Majd Taby‏ @jtaby Apr 25
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      Replying to @rsms @koenbok

      I’m assuming you’ve watched the WWDC talk from a couple of years ago where they discuss doing something similar for the springboard interactions? (Mainly on using rate of deceleration rather than velocity to predict behavior)

      1 reply 0 retweets 1 like
    5. Rasmus Andersson‏ @rsms Apr 25
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      Replying to @jtaby @koenbok

      Nope! Do you happen to have a link or know the title of the talk?

      1 reply 0 retweets 0 likes
    6. Rasmus Andersson‏ @rsms Apr 25
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      Replying to @rsms @jtaby @koenbok

      Rasmus Andersson Retweeted Andy Matuschak

      Possibly related..? https://twitter.com/andy_matuschak/status/1253746694795083776?s=21 …https://twitter.com/andy_matuschak/status/1253746694795083776 …

      Rasmus Andersson added,

      Andy MatuschakVerified account @andy_matuschak
      Replying to @ryhanhassan @rsms
      Ah, thanks for the shout. You can play here: https://andymatuschak.org/scrying-pen/  Fun memory: in ~2013, when I was at Apple, I made all scroll views predict future touches to get a tighter response. We pulled it before shipping—not a big enough diff. There's an API for this now for drawing.
      2 replies 0 retweets 0 likes
      Andy Matuschak‏Verified account @andy_matuschak Apr 25
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      Replying to @rsms @jtaby @koenbok

      I’m guessing this is the talk? https://developer.apple.com/videos/play/wwdc2018/803/ … There’s discussion of deceleration rates for projecting positions of animated objects, but not for estimating when a touch sequence is coming to a stop. Haven’t seen that mentioned in a talk, but don’t watch WWDC anymore.

      9:17 AM - 25 Apr 2020
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      • David Klein Rasmus Andersson
      2 replies 0 retweets 2 likes
        1. New conversation
        2. Majd Taby‏ @jtaby Apr 25
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          Replying to @andy_matuschak @rsms @koenbok

          Yup, projection, not prediction, but thought it could map into what Rasmus was doing.

          1 reply 0 retweets 0 likes
        3. Rasmus Andersson‏ @rsms Apr 25
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          Replying to @jtaby @andy_matuschak @koenbok

          Going to watch this over a morning coffee. Thanks for sharing!

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. Nathan de Vries‏ @atnan Apr 25
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          Replying to @andy_matuschak @rsms and

          Throw projection and touch sequence prediction are similar in so far as they’re modeling inertia - either of the designed digital object being thrown, or the physical inertia of a body / hand performing the input. Predicting much beyond that can add an undesirable feedback loop.

          0 replies 0 retweets 4 likes
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