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Hello Jake...<BR>
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There is no relative motion between markers, they are fixed like a rigid body.<BR>
In the scene graph, the position of the spheres match the settings in the tool geometry file.<BR>
I use a static reference tool.<BR>
Can you explain me more about the RequestComputeTransformTo() method??? i can't find information helpfull.<BR>
I've only found that there is two methods with this name:<BR><FONT size=2>
</FONT><FONT color=#0000ff size=2><FONT color=#0000ff size=2>void</FONT></FONT><FONT size=2> RequestComputeTransformTo(</FONT><FONT color=#0000ff size=2><FONT color=#0000ff size=2>const</FONT></FONT><FONT size=2> CoordinateSystem* targetCoordSys); // in IGSTKCoordinateSystem.h<BR>
</FONT><FONT color=#0000ff size=2><FONT color=#0000ff size=2>void</FONT></FONT><FONT size=2> RequestComputeTransformTo(</FONT><FONT color=#0000ff size=2><FONT color=#0000ff size=2>const</FONT></FONT><FONT size=2> TTarget & target); // in IGSTKCoordinateSystemDelegator.h<BR></FONT>
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Wich is the difference with GetTransform() or where can i get more information about it???<BR>
In our project, the purpose of to get the positions of the three markers is to know the orientation and position of the plane generated by these three points.<BR>
This plane represents an image that moves fixed to the passive tool. hope this information can help to give you an idea :P<BR>
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Thanks, <BR>
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Eric<BR>
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Image Analysis And Visualization Laboratory<BR>Centro de Ciencias Aplicadas y Desarrollo Tecnologico CCADET<BR>
Universidad Nacional Autónoma de México<BR>Circuito Exterior S/N, Cd. Universitaria,<BR>AP 70-186, CP 04510 México, DF<BR>Tel: +(52)(55) 56 22 86 02, ext. 1130<BR><BR>
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<BR>> Date: Mon, 29 Jun 2009 10:28:57 -0700<BR>> Subject: Re: [IGSTK-Users] Tool positions or Tools Translations?<BR>> From: jdmcivor@interchange.ubc.ca<BR>> To: eric_lb@hotmail.com; igstk-users@public.kitware.com<BR>> <BR>> Hey Eric,<BR>> <BR>> Can you clarify something? Is there any relative motion between your<BR>> passive markers, or are they fixed to a rigid body?<BR>> <BR>> If they are fixed like a 'normal' wireless tool, you should be able to<BR>> setup your scene graph in IGSTK to match the settings in the .rom<BR>> file. I think you want to use the RequestComputeTransformTo() method<BR>> instead of the GetTransform() method. The argument should be whatever<BR>> your reference is (I think you were using a static reference tool).<BR>> The GetTransform() method only returns the transform to an objects<BR>> parent, which in this case would be your tool, and the transform you<BR>> defined.<BR>> <BR>> Although it is possible to get single (stray) marker position data<BR>> from Polaris, as others have mentioned, IGSTK doesn't really support<BR>> it. I believe the difficulty is because there is no way to keep track<BR>> of which marker is which.<BR>> <BR>> So, if you just want to recreate where the markers were as you moved a<BR>> wireless tool, you should be able to change your method as above. If<BR>> you want to look at the actual positions of the markers, it will be<BR>> more difficult.<BR>> <BR>> Hope that helps,<BR>> <BR>> Jake<BR>> <BR>> --<BR>> Jake McIvor<BR>> MASc Candidate, Biomedical Engineering<BR>> University of British Columbia<BR>> <BR> ><BR><BR><br /><hr />Tu vida, tus amigos y lo que te interesa <a href='http://www.actualizatuperfil.com.mx/' target='_new'>está en Perfil de Windows Live. Actualízalo.</a></body>
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