cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   Osiris
   Member

   in ccTouchesEnded: How do you determine WHICH touch just ended? Is there something you have to set in ccTouchesBegan:?

   I have a game where people are moving and firing at the same time and when the fire button is let off, the movement stops tracking as well.

   Posted 2 years ago #
2. 

   Osiris
   Member

   Is there something basic that I'm missing?

   Posted 2 years ago #
3. 

   cjl
   Member

   Sorry I don't have a magic answer for you, I haven't spent enough time with the new TouchDispatcher to know if that can help handle multitouch, but I'm pretty sure it can.

   You could do it the hard way. See:
   http://www.iphonesdkarticles.com/2008/09/multi-touch-tutorial.html
   http://www.cocos2d-iphone.org/forum/topic/27#post-122

   Basically, when ccTouchesEnded is called, you can get access to all of the touches, and parse through them as needed. Touches have properties like 'phase' and 'locationInView' which will let you set up the logic you need to figure out which touch ended, and where.

   http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UITouch_Class/Reference/Reference.html

   I'm curious to see if there is a better or easier way of doing this.

   Posted 2 years ago #
4. 

   Osiris
   Member

   at least that points me in the left direction! Thanks.

   Posted 2 years ago #
5. 

   Osiris
   Member

   I have been looking at the examples and I have tried various scenerios.

   Currently I have:

   - (BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
   {
   
   	Sprite *leftButton = (Sprite *)[self getChildByTag:7];
   	Sprite *rightButton = (Sprite *)[self getChildByTag:8];
   	Sprite *fireButton = (Sprite *)[self getChildByTag:3];
   
   	CGRect leftRect = [self makeRect:leftButton];
   	CGRect rightRect = [self makeRect:rightButton];
   	CGRect fireRect = [self makeRect:fireButton];
   
   	UITouch *touch = [touches anyObject];
   	CGPoint loc = [touch locationInView:[touch view]];
   
   	if(CGRectContainsPoint(leftRect, loc)) {
   		thetaMod = 0;
   		[leftButton setOpacity:128];
   	}
   
   	if(CGRectContainsPoint(rightRect, loc)) {
   		thetaMod = 0;
   		[rightButton setOpacity:128];
   	}
   
   	if(CGRectContainsPoint(fireRect, loc)) {
   		[fire setOpacity:128];
   	}
   
   	return 1;
   
   }

   but it doesn't work. Setting thetaMod to 0 does stop the figher in the main timing loop.

   What I am missing is how to trap a touch in ccTouchesBegin that is remembered in ccTouchesEnded, so that I can register that a previous touch ended. I'm definitely at the edge of my experience level and understanding here.

   Posted 2 years ago #
6. 

   Osiris
   Member

   Never mind... I always continue to look when I'm waiting for a response...

   I remembered that I had forgotten to convert the points to the landscape mode screen. The new function:

   - (BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
   {
   
   	Sprite *leftButton = (Sprite *)[self getChildByTag:7];
   	Sprite *rightButton = (Sprite *)[self getChildByTag:8];
   	Sprite *fire = (Sprite *)[self getChildByTag:3];
   
   	CGRect leftRect = [self makeRect:leftButton];
   	CGRect rightRect = [self makeRect:rightButton];
   	CGRect fireRect = [self makeRect:fire];
   
   	UITouch *touch = [touches anyObject];
   	CGPoint loc = [touch locationInView:[touch view]];
   	CGPoint convertedPoint = [[Director sharedDirector] convertCoordinate:loc];
   
   	if(CGRectContainsPoint(leftRect, convertedPoint)) {
   		thetaMod = 0;
   		[leftButton setOpacity:128];
   	}
   
   	if(CGRectContainsPoint(rightRect, convertedPoint)) {
   		thetaMod = 0;
   		[rightButton setOpacity:128];
   	}
   
   	if(CGRectContainsPoint(fireRect, convertedPoint)) {
   		[fire setOpacity:128];
   	}
   
   	return 1;
   
   }

   Seems to work perfectly. I like to update these when I discover the answer so other people that might be struggling with something similar can see what I believe the correct answer is as well.

   thanks again cocos2d community.

   and please! If you see a way I can be doing this better or more efficient, please dont hesitate to speak up! I love learning!

   Posted 2 years ago #
7. 

   artem
   Member

   Try this link, helped me a lot

   http://juanmunozar.blogspot.com/2009/02/cocos2d-iphone-dynamically-touch.html

   Posted 2 years ago #

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