discrete versus scrolling XY values; Brendan's stuck


    Apr 13 2011 | 1:41 pm
    Hi I have hacked a touchpanel and, using Arduino -> [serial], I've got some fairly stable XY values coming in to Max. I wanted discrete and instantaneous location values - touch somewhere, release, touch again; a brief conversion to the signal domain and a [snapshot~] object does this perfectly. However, before the signal domain conversion, I have 'continuous' XY data, a tiny little bit noisy but usable, which allows for 'click-drag' functionality, or scrolling values. How can I tie these two modalities together in Max, without losing the discrete instantaneous touch data? What I desire is rock solid location data, and the ability to drag/scroll.
    pseudo-code: if the number attains it's maximum and doesn't change for N milliseconds then it is discrete..... if the number does change (over N or M milliseconds?) then it is continuous
    haaaalp Brendan
    patch below

    • Apr 13 2011 | 3:10 pm
      Hi Brendan. This might get you started - if I have understood your question! hth aa
    • Apr 13 2011 | 4:19 pm
      Hi Andrea thanks for your elegant solution; it addresses one element of my question, which I may not have described very well:
      I have a number stream from a touchpanel, which sharply rises (< c.20ms) to the correct X and Y value when the panel is touched. Using an averaging function in Arduino has cleaned up much of the data noise. To capture discrete values I simply use a [togedge] bang and [snapshot~]. This works perfectly well; however, I would also like to be able to use the continuous data from dragging across the touchpanel: as expected, the [togedge] bangs once and lets through a discrete value, not the continuous one...I have attached a small patch demonstrating the issue,
      thanks again
    • Apr 13 2011 | 5:12 pm
      don't know if this is helpful at all... works with the trackpad ;)
    • Apr 13 2011 | 5:43 pm
      Hey thanks MIB not at Max at the moment, but i'll have a look asap
      Brendan
    • Apr 13 2011 | 5:49 pm
      this appears to work like a charm......thanks again
      Brendan