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Re: AffineTransform

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Re: AffineTransform

Subject: Re: AffineTransform
From: Gregory Weston <email@hidden>
Date: Sat, 12 Sep 2009 10:15:31 -0400

Development wrote:

I am using the following to rotate an image and Im having a problem.
After the transform when I attempt to move the image it collapses to 0
width and does other unpredictable and strange things. What am I
forgetting to do so that the image is movable?

	self.transform = CGAffineTransformMakeRotation(delta);
	[self setNeedsDisplay];

At a guess, what you're forgetting to do is flank the rotation with translations so you're rotating around the point you actually want to. And note that with 2 exceptions the second translation is not just the inverse of the first. _______________________________________________

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