On 10 Nov 2008, at 1:55 pm, Kyle Sluder wrote:
Please be aware that rotation around a point other than the origin is not a linear transformation. This may be why such functionality was omitted from NSAffineTransform.
It is linear. But maybe what you're referring to is that it's easy to screw up a combination of rotation, scaling and translation so that a shape - say a rect - gets inadvertently skewed and becomes a trapezoid. That's still a linear transformation, but quite often definitely not what you want.
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