On Tue, Jun 16, 2009 at 9:21 AM, Graham Cox<graham....@bigpond.com> wrote: > Are you asking whether it's better (by some definition of "better") to > change the Z position of an image in CA, thus moving it further away or > nearer, or to just scale it in 2D? Ultimately, these two things are > equivalent, because your screen is a 2D surface and any 3-dimensional > effects are an illusion. The illusion of distance is achieved by scaling.
Visually they're equivalent but operationally they're quite different. If the effect you need is a 2D scale, you need not involve all the 3D machinations, which involve uploading the texture to VRAM, applying a 3D translation, and then applying a projection transform back. Not to mention you have better control over the resampling in Quartz. --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
