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today we discovered that a UIWindow can be smaller than the screen and that subviews of a UIWindow can be outside the bounds of the UIWindow and yet still be rendered, though of course they don't receive touch input
in other words, it's just a UIView like any other
we also discovered that the documentation for -[CALayer convertPoint:toLayer:] is⦠so unclear as to basically be wrong, but its actual behaviour is the one we hoped it might be, so that's nice :)
the touchHLE compositor co-ordinate spaces journey has taken a truly mortifyingly long time but it ends this week
ε°γγγ€
one of touchHLE's great original sins, entirely my fault, is that more or less everything in the code assumes that all layers and views are axis-aligned rectangles that can't be rotated, and that the only co-ordinate space transform that propagates hierarchically is translation
this was of course a temporary limitation to make it easier to implement correctly, but as everyone knows, there is nothing more permanent than a temporary solution, and it's been haunting us for two years now
it's also an embarrassment for me as a graphics programmer really
but while the fix for it is βjustβ a bunch of matrix multiplications (a thing I ought to find a piece of cake given my ostensible career history), they affect all sorts of different places in the code, and cascade, and you'd better make sure you do them in exactly the right order
so this is why I was very excited at finding a viable way for us to build simple iPhone OS 2 apps without using Xcode 3 on fucking Mac OS X Leopard in that insufferably slow VM, because the only way to fix all this and remain sane is to make gradually more complex visual tests
and that's what you're getting a taste of with the images in this thread: I'm gradually accumulating little test screens in touchHLE's imaginatively named βTestAppβ, each of which provides a visual test of some aspect of Core Animation's layer hierarchy and affine transforms
βIβ in this thread is Kanbaru Suruga, by the way. monkey girl and Super Monkey Ball enjoyerβ¦
just wrote my first Objective-C generics code. god I fucking love Objective-C this is a wonderful language
when the Sonic CD credits theme hits just as you finally come to the correct solution to the last remaining problem π
it's finally fucking over https://github.com/touchHLE/touchHLE/commit/58773d6b49cca1b0ad54ebd1dd31452757f1b989
I'm celebrating by watching Monogatari and, in half an hour, playing basketball, which should thoroughly take my mind off this