CCSprite convertTouchToNodeSpaceAR / boundingBox issues

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CCSprite convertTouchToNodeSpaceAR / boundingBox issues

(4 posts) (3 voices)

Started 1 year ago by Robert Payne
Latest reply from TBBle

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Robert Payne
Member
I'm trying to setup touch hit testing on some characters I have in a very basic game but running into issues in which I think may be a bug in cocos2d or simply my error.

Hit Test Code:
```
- (BOOL)touchInsideCharacter:(UITouch *)pTouch {
	CGPoint touchPoint = [self.parent convertTouchToNodeSpaceAR:pTouch];
	return CGRectContainsPoint(self.boundingBox, touchPoint);
}
```
The character has an anchor point of something like 0.5, 0.176. I think what may be happening is the touch is calculated in local coordinates while the bounding box is in parent coordinates space?

Essentially the touch area seems to always be off on the Y axis but is fine on the X.

Any help appreciated.

-Robert
Posted 1 year ago #
araker
Moderator
I use the following the following code to check if a point lies within a boundingBox.
```
CGPoint p = [touch locationInView:[touch view]];
	 p = [[CCDirector sharedDirector] convertToGL:p];
 return CGRectContainsPoint([button boundingBox],p);
```
I don't know though if this is still correct when you have a scrolling world.
Posted 1 year ago #

araker
Moderator

I came across this problem today, so for future reference this code does work..

CGPoint p = [touch locationInView:[touch view]];
 p = [[CCDirector sharedDirector] convertToGL:p];
 p = [self.parent convertToNodeSpace:p];
 return CGRectContainsPoint([self boundingBox],p);

Posted 1 year ago #

TBBle
Moderator

By the by, there's a convenience function in CCNode to handle the first three lines for you. It's convertTouchToNodeSpace:

CGPoint p = [self.parent convertTouchToNodeSpace: touch]; return CGRectContainsPoint( self.boundingBox, p );

Posted 1 year ago #

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