Get Rotation from AffineTransform

[Matthew Precious]

So according to the Java Docs, the AffineTransform class can give you
its translation, scale, and shear, but not rotation. Is there any way to
figure this out?

Thanks,
Matt

[Dmitry Safonov]

You could keep the AffineTransform un-rotated, keep your own int theta
around somewhere, and copy the transform and apply rotate() right
before you need the rotated matrix.

[Mac]

On Mar 27, 2:12 am, Matthew Precious

Rotation is just a combination of scaling and shearing, you could
probably use the getMatrix method, and solve the system of equations
to get the rotation value. but as Dmitry said, your better off keeping
track of it yourself, if you need it.

Mac

[Matthew Precious]

I was trying to avoid doing that since it seems kind of crude, but I
guess that is the only way.

Thanks!

[it.sp...@gmail.com]

Op zaterdag 27 maart 2010 07:12:41 UTC+1 schreef Matthew Precious het volgende:

What works it the following:

Math.atan2(at.getShearY(), at.getScaleY());

'at' being the AffineTransform instance