[Insight-users] Bug? Angles orientation in Rigid2DTransform subclasses

[Julien Jomier]

Hi Tom,

This sounds like a bug. Can you log it in the BugTracker. 
www.itk.org/Bug and assign it to me?
I'll take a look as soon as I can,

Thanks for the report,

Julien

Tom Vercauteren wrote:
> Hello everybody,
> 
> Sorry for posting this once more but I guess my previous message
> didn't ring any bell because of the release of ITK 2.0.
> 
> It seems to me that the angles in Rigid2DTransform subclasses are
> given with clockwise orientation instead of the usual
> counter-clockwise one.
> The following lines can be found in itkEuler2DTransform.txx,
> itkCenteredRigid2DTransform.txx and itkSimilarity2DTransform.txx.
> /////////////
> const double ca = cos( angle );
> const double sa = sin( angle );
> 
> this->m_RotationMatrix[0][0]= ca;    this->m_RotationMatrix[0][1]=-sa;
> this->m_RotationMatrix[1][0]= sa;     this->m_RotationMatrix[1][1]= ca;
> ////////////////
> 
> In itkAffineTransform.txx (used in
> Examples/Filtering/ResampleImageFilter3.cxx) the function Rotate2D is
> using the usual orientation:
> //////////////////////
> trans[0][0] =  cos(angle);
> trans[0][1] =  sin(angle);
> trans[1][0] = -sin(angle);
> trans[1][1] =  cos(angle);
> /////////////////////
> 
> Am I missing something here or is it a real bug?
> 
> Best regards,
> 
> Tom Vercauteren
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> 
>