[Insight-users] itkEuler2DTransform: modification to m_Rotati onMatrix during Compose is lost

[Miller, James V (Research)]

Julien,

Does your decomposition of the angles from the matrix need to take
into account the m_ComputeZYX flag?

Jim

-----Original Message-----
From: Julien Jomier [mailto:jjomier at cs.unc.edu]
Sent: Thursday, April 01, 2004 10:48 AM
To: 'Charl P. Botha'; insight-users at itk.org
Subject: RE: [Insight-users] itkEuler2DTransform: modification to
m_RotationMatrix during Compose is lost


Hi Charl,

I just closed this bug. It is now fixed in the repository for both
itkEuler2DTransform and itkEuler3DTransform.

Thanks for the report,

Julien

> -----Original Message-----
> From: insight-users-admin at itk.org 
> [mailto:insight-users-admin at itk.org] On Behalf Of Charl P. Botha
> Sent: Tuesday, March 30, 2004 8:47 AM
> To: 'insight-users at itk.org'
> Subject: [Insight-users] itkEuler2DTransform: modification to 
> m_RotationMatrix during Compose is lost
> 
> 
> I've reported the following as Bug #726:
> 
> The Python example below shows how an Euler2DTransform simply 
> loses rotation during a transform concatenation.  This is due 
> to the fact that
> itk::Rigid2DTransform::Compose() concatenates the 
> m_RotationMatrix, but that there's no code to set the new 
> itk::Euler2DTransform::m_Angle from the m_RotationMatrix.  In 
> this way, the rotation is lost.
> 
> # create two Euler2D transforms and set to identity
> a = itk.itkEuler2DTransform_New()
> a.SetIdentity()
> 
> b = itk.itkEuler2DTransform_New()
> b.SetIdentity()
> 
> # set and confirm rotation to 0.2
> a.GetParameters().SetElement(0,0.2)
> a.SetRotation(0.2)
> a.GetParameters().GetElement(0)
> 0.20000000000000001
> 
> # concatenate b and a
> b.Compose(a.GetPointer(),0)
> 
> # resultant rotation is 0.0!
> b.GetParameters().GetElement(0)
> 0.0
> 
> -- 
> charl p. botha http://cpbotha.net/ http://visualisation.tudelft.nl/
> 
> 
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> 

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