On Tue, Jul 26, 2011 at 10:51 AM, David Duncan 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 t
On Jul 26, 2011, at 7:50 AM, Kyle Sluder wrote:
> From the description given in the documentation, I would think that because
> CA is sorting the layers based on sibling order and zPosition that it would
> be possible to render a layer of zPosition=0 atop a nephew layer with
> zPosition=1000.
>
On Jul 26, 2011, at 7:13 AM, Graham Cox wrote:
> Anyway, what I've learned is that the z values need to be big, and probably
> not terribly precise.
David Duncan's post in this thread seems relevant:
http://www.cocoabuilder.com/archive/cocoa/193266-reordering-calayer-sublayers-without-raping-m
OK, turns out that the zPosition property of the layers is important here. I
was setting them to values like 100, and -100. That turns out to be way too
small - the perspective/rotation transform I was applying to the 'behind'
layers was swinging these layers into a zPosition that greatly exceed
