actionscript 3 - How to determine primary swipe direction (using MultiTouch) in AS3? -


i'm trying implement simple swipe recognition on touch screen using as3. need know whether swipe left, right, top, or bottom.

first question: easier using simple mouse_down , mouse_up, , calculate distance(s) moved?

or easier using multitouch?

i see code multitouch showing how implement swipe detection , getting direction thus:

        if (e.offsety == 1) {      //user swiped towards bottom     square_mc.y += 100;      }     if (e.offsety == -1) {      //user swiped towards top     square_mc.y -= 100;     }             if (e.offsetx == 1) {      //user swiped towards right     square_mc.x += 100;      }     if (e.offsetx == -1) {      //user swiped towards left     square_mc.x -= 100;     }

but if need resolve 1 direction (that left or up, right or bottom, etc), how do (and if offsetx , offsety true offsets, why checking +1 , -1 only? or function called during swipe? i'm trying 1 complete swipe).

i'm thinking skipping multitouch might simpler, welcome feedback. thanks!

you can answer own question(s) doing 2 things...

1 re-read tutorial code came from.. section headed "coding gesture" http://www.republicofcode.com/tutorials/flash/as3swipegesture/

2 experiment , learn observing results. example...

but if need resolve 1 direction (that left or.... how do that?

well what's wrong line in code provided if (e.offsetx == -1) { square_mc.x -= 100; }. did test it? did square_mc not move left 100 pixels when swiped towards left direction? if worked have "resolved" 1 direction, guess. can add other if statements other directions needed.


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