On 12 Mar '08, at 2:49 PM, Nathan Vander Wilt wrote:
I don't understand what this "base" coordinate system is (not the window's, otherwise the conversions would likely be offset by the view's position therein, right?). But whatever it is, it seems to be shared by the CALayer.
The Cocoa Drawing Guide, under "Pixel-Exact Drawing", says:"These convenience methods make it possible to convert values to and from the base (device) coordinate system. They take into account the current backing store configuration for the view, including whether it is backed by a layer."
In a layer-backed NSView, it seems that the 'device', aka backing store, is the view's CALayer; so these methods will convert to/from the layer's coordinates.
I'll go update GeekGameBoard now... —Jens
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