On Nov 27, 2009, at 12:46, Shane wrote: > I don't know how large my NSPointArray size needs to be so I'd like to > know how I would dynamically allocate NSPoints to populate an > NSPointArray? I think I can do it with NSMutableArray, but > NSBezierPath takes an NSPointArray (which is what my end result is for > the points) and it just seems cleaner and more efficient if I can stay > with that instead of converting between point arrays and mutable > arrays.
The most direct (and C-ish) way is to malloc memory for the NSPointArray and realloc it whenever you need to grow its size. The easiest way (and Objective-C-ish way) is to use a NSMutableData object with the NSPointArray as its data. Whenever you want to add points, just resize the NSMutableData object to 'sizeof (NSPoint)' * total number of points, and use '(NSPointArray) [data mutableBytes]' as a pointer to the start of the array. (If you use the latter approach, and you're using garbage collection, and you assign the '[data mutableBytes]' pointer to a stack variable or pass it as a method parameter, make sure you keep the NSMutableData object reference alive until you're done with the 'mutableBytes' pointer.) _______________________________________________ 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
