Re: NSImage > trapezium...
Re: NSImage > trapezium...
- Subject: Re: NSImage > trapezium...
- From: glenn andreas <email@hidden>
- Date: Sun, 23 Mar 2008 09:10:14 -0500
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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