#pragma mark CCDirector Category for Point Handling


#import "cocos2d.h"


@interface CCDirector (Points)

- (CGSize) ptWinSize;

- (CGPoint) convertToPt:(CGPoint)point;
- (CGPoint) convertToPx:(CGPoint)point;

@end


@implementation CCDirector (Points)

- (CGSize) ptWinSize {
	CGSize s = [self winSize];
	CGPoint p = [self convertToPt:ccp(s.width, s.height)];
	return CGSizeMake(p.x, p.y);
}


- (CGPoint) convertToPt:(CGPoint)point {
	return ccpMult(point, 1.0/self.contentScaleFactor);
}

- (CGPoint) convertToPx:(CGPoint)point {
	return ccpMult(point, self.contentScaleFactor);
}

@end


#pragma mark CCNode Category for Point Handling


@interface CCNode (Points)

@property (assign) CGPoint ptPosition;
@property (assign) CGSize ptContentSize;

- (CGPoint) ptConvertToNodeSpace:(CGPoint)point;
- (CGPoint) ptConvertToWorldSpace:(CGPoint)point;

@end


@implementation CCNode (Points)

- (void) setPtPosition:(CGPoint)pos {
	self.position = [[CCDirector sharedDirector] convertToPx:pos];
}

- (CGPoint) ptPosition {
	return [[CCDirector sharedDirector] convertToPt:self.position];
}

- (void) setPtContentSize:(CGSize)size {
	CGPoint p = [[CCDirector sharedDirector] convertToPx:ccp(size.width, size.height)];
	self.contentSize = CGSizeMake(p.x, p.y);
}

- (CGSize) ptContentSize {
	CGPoint p = [[CCDirector sharedDirector] convertToPt:ccp(self.contentSize.width, self.contentSize.height)];
	return CGSizeMake(p.x, p.y);
}

- (CGPoint) ptConvertToNodeSpace:(CGPoint)point {
	point = [[CCDirector sharedDirector] convertToPx:point];
	point = [self convertToNodeSpace:point];
	point = [[CCDirector sharedDirector] convertToPt:point];
	return point;
}

- (CGPoint) ptConvertToWorldSpace:(CGPoint)point {
	point = [[CCDirector sharedDirector] convertToPx:point];
	point = [self convertToWorldSpace:point];
	point = [[CCDirector sharedDirector] convertToPt:point];
	return point;
}

@end

CCDirector / CCNode Category for Working with Points instead of Pixels

iphone

Objective C