[IGSTK-Users] Question about the tracker coordinate transformations

[Patrick Cheng]

Hi Shuiling,

If you do need to get the Tref and Traw. Here is the method you should
be using:

refTool->RequestGetTransformToParent();
tool->->RequestGetTransformToParent();

or you can use explicit method:

refTool->RequestComputeTransformTo( tracker );
tool->RequestComputeTransformTo( tracker );

You need to setup an observer to receive the transform.

Here is some sample code:

// Connect observer
typedef igstk::TransformObserver ObserverType;
ObserverType::Pointer transformObserver = ObserverType::New();
transformObserver->ObserveTransformEventsFrom( m_ActiveTool );
transformObserver->Clear();

// Request for transform
m_ActiveTool->RequestComputeTransformTo( m_WorldReference );
// Check the recipient
if ( transformObserver->GotTransform() )
{
  // Retreive the transform
  igstk::Transform transform = transformObserver->GetTransform() ;
}


Patrick



On 7/25/2010 8:26 PM, ling Shui wrote:
> Hi all,
> 
> Sorry to disturb you again! Maybe my last email didn't represent the 
> question clearly.
> On page 139 of IGSTK Book - formula (9.2) and (9.3) - I don't know how 
> to obtain the transform Tref and Traw with the class of IGSTK. Who can 
> help me? Thank you advance for any help.
> 
> Best Regards,
> 
> Shuiling
> 
> ------------------------------------------------------------------------
> Hotmail: Trusted email with Microsoft’s powerful SPAM protection. Sign 
> up now. <https://signup.live.com/signup.aspx?id=60969>
> 
> 
> 
> _______________________________________________
> Powered by www.kitware.com
> 
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
> 
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/cgi-bin/mailman/listinfo/igstk-users