On Tue, Jul 26, 2011 at 10:51 AM, David Duncan <david.dun...@apple.com> wrote: > Except for certain situations, Core Animation effectively treats each layer > as a rendering target – that is, all of that layer's sublayers are flattened > into that layer to produce the final image for that layer. What this means > is that only local sibling ordering matters at any given level of the layer > tree. Graphically that means if you have this: > > X > | \ > Y Z > | > W > > W can never render on top of Z, because W always renders "into" Y, and Z > always renders on top of Y.
Okay, I misinterpreted your comment in that other thread. > This is basically what you have with a CALayer already (zPosition should be > usable as a way to order layers, but sublayer order is generally better). If > you use a CATransformLayer, or a CAReplicatorLayer with preservesDepth=YES > then you are effectively asking Core Animation to act more like a textured > quad renderer. See the CATransformLayer documentation for details on the > restrictions that come with that. It sounds like an explicit render target would still be a handy thing to have, though, for cases where you'd want to render a bunch of quads into a billboard. --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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
