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Very infrequent "touchesMove" events... only on iPhone — Gideros Forum
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    Very infrequent "touchesMove" events... only on iPhone

    cubuspl42cubuspl42 Member
    edited July 2013 in Bugs and issues
    I have a very strange issue... I've tested my app on Galaxy S2, Galaxy S4, iPad 3 an iPhone 4S. On the iPhone I receive about one touchesMove event per second (while moving a finger on the screen, of course). :(

    On Gideros 2012.09.10 not calling b2.World.step "fixed" the isssue (I was receiving a lot of touchesMove events).

    So I thought that upgrading Gideros was a good idea. On Gideros 2013.06.1 even not calling b2.World.step doesn't help.
    On all devices, including the iPhone, FPS was good and there were no real performance issues - always about 60 enterFrame events per second. I've tried to listen for mouseMove events instead - no difference.

    The situation is a bit difficult for me, because the iPhone doesn't belong to me and I cannot spend much time debugging the issue on it. If someone wants to spend a minute to run this project on an iPhone (preferably 4 or 4S) and tell me if they have that issue too, I would be very grateful.

    Link to the project:
    https://github.com/cubuspl42/mgame/archive/dev.zip
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    Comments

    • tkhnomantkhnoman Member
      Yes, the same issue on iPhone 4G and iPad 2, i don't know where is the exact problem is, but it is at that World:tick (whcih contain updateMasters, on_tick, and updateSlaves... which each of them seems create the cause)

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    • atilimatilim Maintainer
      I think I know the problem. With 2013.06.x, I've dropped multi-threaded rendering loop on iOS. And now iOS cannot generate touch events frequent enough. I'll fix it very soon.
      http://en.wikipedia.org/wiki/Cytorus
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    • cubuspl42cubuspl42 Member
      edited July 2013
      Thank you very much @tkhnoman!
      Why do you think that the problem is in World.tick?
      Actually, the problem doesn't seem to be a pure performance issue, because FPS is high...
      If you edit 'init.lua', line 11, from 'dbg = 0' to 'dbg = 1' you can see a performance graph which doesn't show any big lags (at least on the iPhone 4S I was testing on).
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    • cubuspl42cubuspl42 Member
      Thanks for you answer @atilim! That's right, the 2013.06 did it worse, but the issue originates from 2012.09... :(
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    • cubuspl42cubuspl42 Member
      edited July 2013
      Ok, worse news: The whole problem with touch events didn't exist on iPad 3. After updating Gideros Player to 2013.06.1 the app is unusable on iPad 3. Performance is still very good - it's just about frequency of touch events (now: sometimes 1 event per 5 seconds!).

      Remember that issue is older than 2013.06, so it's also about multi-threaded rendering loop stuff, but not only that.

      edit: Even if I don't call World.tick at all (the only heavy function I have), during some runs the touch events are very, very laggy (1 event per few seconds). But it happens only on SOME runs (like 10% chance). It's strange. It's very strange. :/
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    • tkhnomantkhnoman Member
      Woop... Never know that there is a change.
      Now that atilim mention about that, i know why my game seems a bit unresponsive.

      Waiting for an update before updating my game :-h

      And yeah, it is so weird cubuspl42, adding and erasing a print() even affect the touch events. I'm confused enough while debugging yours. :)) Now we know the reason, we need to wait for it
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    • cubuspl42cubuspl42 Member
      It is weird... I'm not sure how the Gideros' event loop is constructed, but it shouldn't ever give less touchesMove events (while dragging the finger on the screen) than enterFrame events... Do you agree, @atilim?
      IMO, it's a bug and it should be fixed ASAP.
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