Sparrow Forum

1. 

   ortnec
   Member

   Hi all,

   first of all, I have to say thank you to the creators of this wonderful framework!

   I am writing a game in which objects (SPSprites with SPImages in them) fall from the top of the screen (animated with SPTweens) and the user has to tap the right object while they fall (sort of the balloon example in reverse).

   I attach this listener to the "right" sprites:
   [sprite addEventListener:@selector(onRightTouch:) atObject:self forType:SP_EVENT_TYPE_TOUCH];

   and I have a different one for the "wrong" sprites:
   [sprite addEventListener:@selector(onWrongTouch:) atObject:self forType:SP_EVENT_TYPE_TOUCH];

   The thing I noticed is that, a lot of times, the touch events are missed, even if my finger is exactly in the right position...

   If I add a listener to the stage it gets all the touches, even the missed ones, so I was thinking that maybe I could make my own algorythm to detect what is under the touch in a specific moment...

   Does it happen to anybody else? Suggestions? Hints?

   Thanks in advance

   Posted 1 year ago #
2. 

   Kayhan
   Moderator

   I have also noticed this. It usually happens when my objects have been rotated a certain amount (PI/2) but is not always constant. Touch events sometimes work on points on the object like on its side. This seems to have stopped in one of my classes and I will be looking into it as it is unjust to not bubble when a player does everything right.
   Give me some time to share my findings, your not alone in this enigma.
   Its weirdish.

   Posted 1 year ago #
3. 

   ortnec
   Member

   A little update.
   Even my objects are rotated (randomly) but I can't seem to associate the problem with a specific rotation angle.
   I tried using only one eventListener on the stage and detecting which object is the [event target]... It's not solved by it seems to alleviate the problem.

   Posted 1 year ago #
4. 

   Daniel
   Primary Feather

   Hm, the touch coordinate transformations have always worked for me in the past! If someone can create a small test project which shows how to reproduce the problem, that would be great. Thanks!

   Posted 1 year ago #
5. 

   Kayhan
   Moderator

   I looked into it again and everything has straightened out. It is all working fine now and I can't really pin point what change did it as lots have been made.

   Posted 1 year ago #

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