[PD] [pix_crop] offY incoherence
colet.patrice at free.fr
Mon Jun 7 02:22:53 CEST 2010
I think about resolving this counter intuitive problem by using values between 0 and 1 for all
computings, and apply the pixels dimensions at the end
Patrice Colet - 06 32 66 03 57
----- "Mathieu Bouchard" <matju at artengine.ca> a écrit :
> On Sun, 6 Jun 2010, patko wrote:
> > hello, why [pix_crop] y is offsetting from the lower left, when
> [gemmouse] (or logic) is starting from the highest left?
> For the same reason that GridFlow usually uses (y x) and sometimes (x
> y) :
> it's because of conflicting standards.
> There's worse : if you've read books involving spherical coordinates,
> you'll see that there are perhaps at least five different conventions
> concurrent use... varying according to whether latitude is signed or
> unsigned ("colatitude") and the six possible orderings of three
> It's crazy.
> _ _ __ ___ _____ ________ _____________ _____________________ ...
> | Mathieu Bouchard, Montréal, Québec. téléphone: +1.514.383.3801
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