I think the "isChanged" member in EmscriptenTouchPoint gives you this information, together with the "identifier" member to associate the touch point with touches in previous events.
Basically, when you get a TOUCHEND event, the touch point(s) which have isChanged set to true should be the ones that have been 'lifted', and the other touch points are the state of the remaining active touches Interestingly I just noticed that in my own gesture recognizer (copied more or less from the Android NDK), the isChanged information isn't even used, the recognizers just get the same information from some followup event (e.g. a MOVE) which has fewer touch points then expected. Cheers! -Floh. On Monday, 10 September 2018 23:39:48 UTC+2, McLaurin Entertainment wrote: > > I am using Emscripten to get a number of C++ games running under HTML5. > The client requires that these games also run in a mobile web browser, they > do not want to make a native app. > > The games require me to properly handle multitouch events - if the user > applies three fingers to the screen, I have to react accordingly to all > three fingers. However, I'm seeing an issue when testing on Safari on an > iPad Mini, and I expect it happens elsewhere as well (though so far I'm not > seeing it on Android). > > What I'm finding is that when a touch callback is hit, for instance if I > set a callback via emscripten_set_touchend_callback, then whenever a > touchend event occurs, that callback gets hit with all active touchpoints > included in the EmscriptenTouchEvent. As such, I don't know which > touchpoint the event applies to. For instance if three fingers are down, > and you lift the second finger, all three touchpoints are passed to the > touchend callback. Is there a way for me to determine which touchpoint the > touchend event applies to? If this is a bug, is there a known workaround? > > Thank you in advance. > > John > > > > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
