iPhone Drawing Issue

EnterpriseGlobe

Well-known member
Jan 12, 2009
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newbie here on IPhone SDK development issue.

I created a circle with CGContextAddEllipseInRect() and It is working fine.
I have some other view (ball) which I want to move inside the circle randomly (Random moving I did already).
What I want is , If Ball view touches the circle line it has to move back.

How can I know the whether the ball touches the circle line or not ?

Looking forward for your response guys.
 

Vita Alex

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Apr 13, 2009
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Check how close the ball's center is to the circle's center.

If it's less then their diameters combined - then yes, it touches :)

Edit: You meant inside. In this case the solution is different, but same approach. You should be able to figure it out :)
 

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