Detecting hit areas on a cocos2d sprite

gistfile1.txt

@implementation MySprite

// The internal rect representing the current texture
- (CGRect)hitArea {
  CGPoint bl = CGPointMake(MIN(_quad.tl.vertices.x, _quad.bl.vertices.x), MIN(_quad.bl.vertices.y, _quad.br.vertices.y));
  CGPoint tr = CGPointMake(MAX(_quad.tr.vertices.x, _quad.br.vertices.x), MAX(_quad.tl.vertices.y, _quad.tr.vertices.y));
  return CGRectMake(bl.x, bl.y, tr.x - bl.x, tr.y - bl.y);
}

// Works just like .boundingBox (eg, represents the hitArea in parent coordinates)
- (CGRect)hitBox {
  return CGRectApplyAffineTransform(self.textureArea, [self nodeToParentTransform]);
}

@end