On Feb 6, 2010, at 10:54 AM, Development wrote: > I have an app I am working on and several of the touch zones or buttons > occur within a trapezoid. Because these trapezoids touch one another to > complete a picture I need for the zones to be precise. What I'm not sure how > to accomplish is allowing touch within the border of the trapezoid and not > outside in it's broader rect. Is there way to define a touchable zone that is > non-rectangular?
You can do the hit-testing yourself by getting the touch coords and seeing which trapezoid it's in. The easiest way to do this is to create an NSBezierPath in the shape of the trapezoid and call -containsPoint: on it; but IIRC, that class doesn't exist on iPhone. Fortunately the math for hit-testing convex polygons is pretty easy: check any computer graphics textbook for details. —Jens _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
