cocos2d for iPhone

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

1. 

   ryanam
   Member

   I setup a touch event for a sprite and it works only when I touch part of the sprite not the whole sprite.... it's as though the CGRect is some how offset but I'm not sure, here is my code below, I am using cocos2d 8.1:

   - (BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
   {
   UITouch *touch = [touches anyObject];
   CGPoint location = [touch locationInView: [touch view]];
   CGPoint convertedPoint = [[Director sharedDirector] convertCoordinate:location];

   CGRect myRect = CGRectMake(mySprite.position.x, mySprite.position.y, mySprite.contentSize.width, mySprite.contentSize.height);

   if (CGRectContainsPoint(myRect, convertedPoint)) {
   //Whatever action
   return kEventHandled;
   }

   }

   Posted 2 years ago #
2. 

   PhilM
   Member

   unless you've changed the sprites anchor point, its set at the center, NOT the bottom left.

   so you need to take this into account in your myRect line by subtracting half the sprites width/height from its x & y points.

   Posted 2 years ago #
3. 

   ryanam
   Member

   Awesome! that worked! Here's my updated code below:

   - (BOOL)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
   {
   UITouch *touch = [touches anyObject];
   CGPoint location = [touch locationInView: [touch view]];
   CGPoint convertedPoint = [[Director sharedDirector] convertCoordinate:location];

   int newX=mySprite.position.x-(mySprite.contentSize.width/2);
   int newY=mySprite.position.y-(mySprite.contentSize.height/2);
   CGRect myRect = CGRectMake(newX, newY, mySprite.contentSize.width, mySprite.contentSize.height);

   if (CGRectContainsPoint(myRect, convertedPoint)) {
   //Whatever action
   return kEventHandled;
   }

   }

   Posted 2 years ago #

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