[IGSTK-Users] Polaris tracker reference tool

[Fabian Torres]

Hi Philipp.

Thanks for your quick response.

I guess that is an easy way to solve my problem, but I was hopping that
IGSTK has something implemented already.

I will implement that solution and use it until I find a direct solution.

Thanks


On Mon, Dec 2, 2013 at 12:31 PM, Philipp Matthies <
philipp.matthies at gmail.com> wrote:

> 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 <+49%20(89)%20289-19401>
> 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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-- 
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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