I'm afraid it won't work. That's the principle of transparency: you can see what's below, tinted by the color of what's on top. What are you trying to do ? Maybe there's an other way around.
On 13 sept. 2012, at 14:59, Koen van der Drift wrote: > That would be too bad. But maybe I can use one of the > NSCompositingOperation constants, I just read about that. > > https://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSImage_Class/Reference/Reference.html#//apple_ref/c/tdef/NSCompositingOperation > > I'll try that later. > > - Koen. > > On Thu, Sep 13, 2012 at 8:51 AM, Jean Suisse <jean.li...@gmail.com> wrote: >> It is the expected behavior, since the stacking of two partially transparent >> objects leads to a less transparent set. >> So I don't know what you want is possible. >> Are your lines straight ? If so, maybe you could try to draw one of them in >> two segments, to avoid the intersection (beware of the anti-aliasing). >> >> - Jean >> >> On 13 sept. 2012, at 14:40, Koen van der Drift wrote: >> >>> When I draw two lines using NSBezierPaths, both of which have an alpha >>> value of let's say 0.5, the alpha value appears to be higher at the >>> intersection (the color becomes more opaque). Is there a way to >>> maintain the original alpha value for lines that intersect? >>> >>> - Koen. >> Jean Suisse Institut de Chimie Moléculaire de l’Université de Bourgogne (ICMUB) — UMR 6302 U.F.R. Sciences et Techniques, Bâtiment Mirande Aile B, bureau 411 9, avenue Alain Savary — B.P. 47870 21078 DIJON CEDEX _______________________________________________ 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
