Re: NSImage > trapezium...
Re: NSImage > trapezium...
- Subject: Re: NSImage > trapezium...
- From: Cathy Shive <email@hidden>
- Date: Sun, 23 Mar 2008 15:38:21 +0100
Luca, I am sorry for being snippy. I automatically assumed you were
referring to an NSImage when all you said was image. Many many
apologies!!
Glenn has you on the right track :)
Again, good luck and sorry *blush*
Cathy
On Mar 23, 2008, at 3:10 PM, glenn andreas wrote:
On Mar 23, 2008, at 8:54 AM, Cathy Shive wrote:
On Mar 23, 2008, at 2:14 PM, Luca wrote:
Hello. Do you know how can I transform a rectangular image in a
trapezium?
Seriously?
You aren't going to be able to distort your bitmap like this with
NSImage and there is no ready-made CIFilter to do this distortion
that I'm aware of. If I'm wrong about that, then that's the way
to go. But, I think you've gotta do your own pixel pushing for
this one.
Actually, the CIPerspectiveTransform will do this perfectly (you
even just give it the resulting four corner points)
You can't do that will an affine transform though (since
perspective is, by definition, non-affine), so you'll need to use
CoreImage.
Glenn Andreas email@hidden
<http://www.gandreas.com/> wicked fun!
quadrium | flame : flame fractals & strange attractors : build,
mutate, evolve, animate
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