I implemented my own “Pixels to Units” while I wait for Apple legal to reply.
:)
Is it reasonable to assume square pixels?
Square Pixels, yes -- all the broadcast nerds will whine about it, but pixels should always be square, no questions asked. (Apps that legitimately deal with non-square pixels with QC, like Final Cut via FxFactory, will either scale the source/dest stuff themselves, or provide you with scaling inputs when available to have the composition manually scale stuff. Outside of those circumstances, which is pretty much always unless you know otherwise, they're square).
Square destinations, on the other hand (width = height), is seldom the case - make sure you use the renderer destination aspect ratio to get qc units right for that.
-- [ christopher wright ] [email protected] http://kineme.net/
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