[IGSTK-Users] Polaris tracker reference tool

[Philipp Matthies]

Hi Fabian,

I don't know if there is a direct function to query that transformation, but it is very easy to calculate since it is only one coordinate system transformation, e.g. a simple matrix multiplication.

To obtain ultrasoundTool in the coordinate system of referenceTool, simply multiply the inverse of referenceTool with ultrasoundTool, given that both transformations are represented by their 4x4 matrices.

Cheers,
Philipp

---
Dipl.-Phys. Univ. Philipp Matthies
Research Assistant
Computer Aided Medical Procedures (CAMP)
Technische Universität München, Germany
Tel.: +49 (89) 289-19401
http://campar.in.tum.de/Main/PhilippMatthies

> Am 02.12.2013 um 19:03 schrieb Fabian Torres <fabian.trobles at gmail.com>:
> 
> Hi. I would like to know If i can get the transform of a tracked tool with respect to another tool.
> 
> I have two tracked tools in my program attached to the same tracker
> 
> referenceTool and ultrasoundTool
> 
> I am using my reference tool as my scene origin
> 
> View1->RequestSetTransformAndParent(identityTransform, referenceTool);
> 
> But I want this reference tool to also be the origin for the coordinates of my other tool (ultrasoundTool)
> When I ask GetTransform() for the ultrasound probe tool I obtain its transform with respect to the tracker coordinate system, but I want to obtain the transform with respect to the reference tool coordinate system.
> 
> Is there a way ti do this. I have try using
> 
> ultrasoundProbe->RequestSetTransformAndParent(identityTransform,referenceTool);
> 
> but this does not work.
> 
> Thanks for your help
> 
> 
> 
> -- 
> Fabián Torres Robles
> Maestria en Ciencias en Ingeniería Electrónica
> Ingeniería en Sistemas Electrónicos
> tel. 58081280, 0445534661338
> e-mail fabian.trobles at gmail.com, dae.wong at gmail.com 
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