Irrational Exuberance

You are writing a comment about Touch Detection in Cocos2d iPhone, here is a quick summary:

A quick look at three different approaches for implementing touch detection using the Cocos2d iPhone library. There are a number of snippets here, and I imagine it would be rather confusing to approach without a basic understanding of ObjC and Cocos2d iPhone.

You are responding to this comment written by Tim on October 31st 2008, 17:59.

Great article!

I have an observation about using CGRectContainsPoint to try to detect a Sprite though...

I don't think the pseudo-code above will work for detecting your MySprite object. There is no 'rect' support either for Sprite or for NSObject - I think because the Sprites are able to be scaled and rotated so a trivial rectangle can not be easily resolved.

To detect if your point is within a Sprite's bounds you would need to multiply it through the transformation matrix to do it properly.

It may be a good addition to your MySprite class to add the 'rect' operation?

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