Recognising a certain gesture


    Jul 01 2013 | 6:08 pm
    Hi guys
    I posted a while back about recognising a significant movement (gesture) and everyone was really helpful.
    I now have a similar question regarding a gesture that is specifically right to left. Is the best method of recognising this gesture to monitor velocity? Or should it be a combination of monitoring gesture velocity and gesture position?
    Or is it something completely different?
    All the best
    Joe Gornall

    • Jul 01 2013 | 8:18 pm
      Hi
      it would depend entirely on what kind of data you're getting (noise-level, resolution etc) but the simplest method for me would be to subtract a previous value from the current, then a positive result means decreasing input/numbers, and vice-versa:
      But you said as much in your question :)
      Brendan
    • Jul 01 2013 | 8:23 pm
      ooops
      just saw the related thread you mentioned; the above patch doesn't really add anything new to the solution I posted there : {
    • Jul 01 2013 | 10:04 pm
      With that patch you posted, can it be changed to only toggle on when the movement is really fast and the distance is about 50% of the scale?
      Does that make sense?
      All the best
      J
    • Jul 02 2013 | 12:39 pm
      You'll have to judge for yourself what constitutes "50%" as you haven't given us any specific environment variables, but you can set a threshold like this:
      Brendan
    • Jul 02 2013 | 4:50 pm
      HI JOE
      "I posted a while back about recognising a significant movement (gesture) "
      ---> could you tell me where your post is please.
      Thanks so much
      Denis
    • Jul 02 2013 | 6:10 pm
      n00b, sorry I was being a bit unclear. I am getting a constant stream of x&y coordinates, but I am trying to get a bang when the velocity (which I have now set thanks to your addition to the patch) and the distance (ie the x coordinates which ranges from 0 - 320) is "significant". By that I mean the numbers for the x-coordinates quickly changes from a number like 300. to 30..
      Does that make it any clearer or am I just talking nonsense
      All the best,
      J
    • Jul 02 2013 | 6:40 pm
      Thank you JOE, it's kind of you
      Denis