On 25/01/2013, at 11:41 AM, Matt Neuburg wrote:
> It sounds like you sometimes program the way I do - just bang on the black
> box until the right thing comes out the other end, then stop. :) m.
Well in this case, yes. I hate that - I much prefer to have a good
understanding rather than acce
On Jan 24, 2013, at 3:12 PM, Graham Cox wrote:
> stumbled upon the right result which correctly transforms down through a
> series of nested layers and back up again. Don't ask me how it works or I'll
> start to whimper
It sounds like you sometimes program the way I do - just bang on the blac
On 25/01/2013, at 12:42 AM, Matt Neuburg wrote:
> They are not equivalent because the first one starts with
> CGContextTranslateCTM but the second one starts with
> CGAffineTransformMakeTranslation. In other words, the first one begins by
> translating the current transform. The second one be
> Date: Thu, 24 Jan 2013 12:01:28 +1100
> From: Graham Cox
> To: "cocoa-dev@lists.apple.com Dev"
> Subject: Re: Coordinate conversions in CALayer
> Boiling down my problem to its bare essentials, why are these two bits of
> code not equivalent?
>
>
>
On 24 Jan 2013, at 08:19, Graham Cox wrote:
> I've made some progress, in that I managed to make the two code snippets work
> the same, by changing this line:
>
> tfm = CGAffineTransformConcat( tfm, layer.transform );
>
> to this:
>
> tfm = CGAffineTransformConcat( layer.transform
On 24/01/2013, at 12:42 PM, Quincey Morris
wrote:
> This sort of thing drives me nuts too. You have to simplify the problem.
>
> 1. In the scenario where bounds.origin is (0,0) and the anchor point is (0,0)
> -- which should be be a very ordinary scenario to set up, even if you have to
> abu
On Jan 23, 2013, at 17:01 , Graham Cox wrote:
> The above works correctly, but below, which I thought should do the same,
> does not, if the layer.transform property is not the identity matrix:
>
>
> CGPoint anch = layer.anchorPoint;
> CGRect br = layer.bounds;
> CGPoint pos
On 23/01/2013, at 5:41 PM, Graham Cox wrote:
> To create a transform that supposedly will transform from the superlayer TO
> the layer, and I then invert it to go back the other way. It works in the
> simple case, but a rotation transform upsets things. I've tried pretty much
> every combinat
On 22/01/2013, at 4:35 PM, Andy Lee wrote:
> On Jan 21, 2013, at 5:12 PM, Graham Cox wrote:
>> My question is, is there a way to directly convert coordinates between two
>> unrelated layers in a tree, or are these methods implemented by recursion up
>> to a common parent node and then back do
On Jan 21, 2013, at 5:12 PM, Graham Cox wrote:
> My question is, is there a way to directly convert coordinates between two
> unrelated layers in a tree, or are these methods implemented by recursion up
> to a common parent node and then back down to the target layer? If I had some
> hint of ho
Hi all,
Recently I built an (experimental) app around CALayer and friends which
implements a vector schematic editor.
I found that CALayer isn't, not too surprisingly, really a good base for vector
graphics - CAShapeLayer is nice enough but there's nothing for text and I
rapidly ran into probl
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