Scale boundingBox according to self.scale

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Scale boundingBox according to self.scale

(5 posts) (3 voices)

Started 1 year ago by ClintWall
Latest reply from ClintWall

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ClintWall
Member

Hey everyone,

I am building a game with requires zooming in and out. I have accomplished that but when I zoom in the bounding boxes of my sprites do not change even though the sprite becomes bigger when I zoom in. Could somebody please tell me how to resize bounding boxes. My basic scaling code is:

[self setScale:self.scale - fabsf(oldDist - dist)/100];
then
[self setScale:self.scale - fabsf(oldDist - dist)/100];
for the other direction.

Thanks

Posted 1 year ago #

jd
Member

Here is an example of calculating bounding box on the fly taking the current position and scale into consideration.

CGPoint headLoc = [head convertToWorldSpace:CGPointZero];
CGRectMake(headLoc.x, headLoc.y, head.contentSize.width*self.scale, head.contentSize.height*self.scale);

Posted 1 year ago #

ClintWall
Member

Hey jd

Thanks for the quick response but I still cant seem to get it working. I put your code in the init method, above where I check to see if the CCSprite is touched, and right after I scale self. I am using:
NSLog(@"boundingBox.width = %f", player1.boundingBox.size.width); NSLog(@"boundingBox.height = %f", player1.boundingBox.size.height);
to check my bounding box and the number stays the same the entire time.

Thanks
Clinton

Posted 1 year ago #
Benihana
Member

His code does not change the bounding box, it returns a CGRect which is adjusted for zooming. You need to use the returned result from CGRectMake instead of boundingBox.

Posted 1 year ago #
ClintWall
Member

Hey Benihana,

I changed my code and it worked out. Thanks a lot bud.

Posted 1 year ago #

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