On 14/09/2012, at 7:56 AM, Koen van der Drift <koenvanderdr...@gmail.com> wrote:
> > On Sep 13, 2012, at 1:01 PM, Andy Lee <ag...@mac.com> wrote: > >>> >>> Is that possible, since they all have different begin and end points? >> >> Yes. An NSBezierPath can contain multiple unconnected paths. > > This did the trick, I created all lines within the same NSBezierPath, and > when they overlap, the color remained the same. No need to set any blending > or composition modes. Saved me also a lot of creating NSBezierPath instances > and drawing them one at a time. Combining paths into a single NSBezierPath means those paths are treated as a single object for a drawing operation, and intersections are rendered accordingly. However, this behaviour doesn't come at no cost - the code has to find those intersections and deal with them by ensuring that the same pixels are not rendered twice. While usually faster than looping over separate paths, this intersection finding can potentially slows things down a lot. --Graham _______________________________________________ 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
