On Mon, Oct 29, 2012, at 06:22 AM, Roland King wrote: > I have a graphics context and a path and I want to clip everything inside > the path, ie not display it, and leave everything outside the path > displayed. The path is simple and doesn't cross itself, for sake of > example it may as well be a circle. If I start with a clip-free GC and > set that circle as a clipping path, I'll get the opposite, everything in > the circle will show, how do I do the other way around? Does it work if I > set a path at the bound rect of the GC plus my shape in the middle? That > would seem to have two crossings to get into the shape, one at the bounds > of the rect, one as you cross the shape, which should mean everything > inside the shape is 'outside' but does a path at the very extremities of > the GC, or even outside it, count as 'crossed'?
>From the CGContextClip documentation: > The function uses the nonzero winding number rule to calculate the > intersection of the current path with the current clipping path. So try specifying your control points in the opposite order. --Kyle Sluder _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
