On Aug 19, 2013, at 7:36 PM, Rick Mann wrote: > On Aug 19, 2013, at 17:25 , Roland King <[email protected]> wrote: > >> >> On 20 Aug, 2013, at 8:03 AM, Rick Mann <[email protected]> wrote: >> >>> I'm drawing a couple of arcs and then calling ClosePath() to close up the >>> shape I drew. This works great. But then I repeat the process in a >>> different place, and stroke the whole thing. Unfortunately, Core Graphics >>> adds a line from the last point in the closed path to the first point of >>> the new arc I add. From my reading of the docs, this line shouldn't happen. >>> >>> "After closing the subpath, your application can begin a new subpath >>> without first calling CGContextMoveToPoint. In this case, a new subpath is >>> implicitly created with a starting and current point equal to the previous >>> subpath’s starting point." >>> >> >> From my reading that's exactly what should happen. You close the subpath >> then you implicitly start one because you didn't call CGContextMoveToPoint() >> when you add the next arc, that path starts from the original starting point >> of the old subpath (which is functionally exactly the same as the endpoint). >> So the new subpath starts with a line to the start of your new arc from the >> start of the previous path. If you don't want that, do the move. >> >> There's a difference between a context with no path at all and a context >> which already contains subpaths, closed or not. > > Oh, I think you're right. Pity. It makes working with arcs a real pain. I > have to compute the arc's starting point and move to it. Unless I'm missing > something?
You can begin a new path for each arc. If you ultimately want one path with multiple disjoint subpaths, I think you can create the arc subpaths as individual CGPath objects and add them to either the context path or to a master CGPath object. Regards, Ken _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
