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Re: NSView boundsRotation


From: Dr. H. Nikolaus Schaller
Subject: Re: NSView boundsRotation
Date: Thu, 14 Jul 2011 21:45:05 +0200

Am 14.07.2011 um 20:38 schrieb Bluna Ratimonkey:

> On Fri, Jul 15, 2011 at 1:27 AM, Dr. H. Nikolaus Schaller
> <address@hidden> wrote:
>> 
>> Am 14.07.2011 um 19:08 schrieb Bluna Ratimonkey:
>> 
>>> +1 no ads intended. But actually I don't quite understand this. Like
>>> bounds should always be treated like a rectangle in global coordinate?
>> 
>> Yes, should be but apparently isn't. You can try to create a NSBezierPath
>> with rectangular corner points and try to simply apply the transforms one
>> would expect. You will get a *very* different result. First difference is 
>> that
>> you roughly get the bounding box of the rotated corner points.
>> 
>>> But they allowed skew in the transformation while enforcing RSX+T
>>> model? what's the formula of this? RMX+T ?
>> 
>> We don't know the formula used by AppKit.
>> 
>> What is RSX+T and RMX+T? Please explain abbreviations.
>> 
>> BR,
>> Nikolaus
> 
> Hi Nikolaus,
> sorry for the abbrs, thought they were obvious,
> R = rotation matrix 2x2f
> S = scale 2f
> T = translation 2f
> X = point 2f
> M is R.S

Tnx.

> Thanks and PS. did you forget to CC the list?

Yes. Because I prefer lists where "Reply" goes to the list, because a list is a 
list
and private communication is private...




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