How can I capture the amount of surface area that the user is making contact with the iPhone screen?

Posted by BeachRunnerJoe on Stack Overflow See other posts from Stack Overflow or by BeachRunnerJoe
Published on 2010-06-12T21:13:12Z Indexed on 2010/06/13 0:12 UTC
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iphone

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ipad

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opengl-es

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core-graphics

Is there a way to capture the amount of screen that is making contact with the users? I assume there is since this finger painting app shows the ipad responding to only the pixels that the user makes contact with.

Thanks so much in advance for your help!

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