[IGSTK-Developers] Position the CylinerSpatialObject

[Luis Ibanez]

Hi Patrick,

This sounds like a good idea,

  but...

Shouldn't this be a method specific for the "NeedleSpatialObject" ?


after all,
the NeedleSpatialObject is the class that will
have a notion of "EntryPoint" and "TargetPoint".


Adding such methods to the Cylinder will be confusing,
because a cylinder is a generic geometrical shape,
and it is not designed to be inserted into a patient,
as needles are.



   Luis




-------------------
Patrick Cheng wrote:
> Hi all,
> 
> I am proposing adding a RequestSetTipPoints( PointType &pts ) to the 
> CylinderSpatialObject. The parameters passed by are two points indicates 
> the two ends of the CylinderSpatialObject.
> 
> Reason:
> 
> 1. In path planing, we need to place the CylinderSpatialObject by 
> setting entry point and target point. We don't have the Transform here. 
> Actually place the CylinderSpatialObject by fixing it's two ends is more 
> straight forward.
> 
> 2. When the CylinderSpatialObject is attached to the tracker tool, even 
> if we get the transform and orientation right (We haven't got to that 
> point yet), Then there should be another shift applied to the 
> CylinderSpatialObject to move it's tip to the probe tip. This is very 
> cumbersome, confusing, and erroneous. Why don't we take the transform 
> and the size of CylinderSpatialObject, and internally calculate the 
> points for the two ends (Which is easy to do), and place the 
> CylinderSpatialObject in the right position by pinpointing the two ends?
> 
> Thank you,
> 
> Patrick
> 
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