[IGSTK-Users] Code broken in CVS?

[Patrick Cheng]

Hi Anka,

That's excellent. We will give you an cvs account so you can check in 
your code.

Patrick

Anka Kochanowska wrote:
> Hi!
> I have made an example PolarisTrackingUsingQTWidget for which I have cut 
> and pasted code from your Polaris tests and OneViewAndTracking examples. 
> It is hardcoded to my serial port and rom file.
> If you like, I can  change it to get those parameters from user and then 
> deposit.
> Do you really think it is worth doing?
> 
> If yes, I'll do it next week.
> 
> Anka:-)
> 
> 
> Patrick Cheng wrote:
>> Hi Anka,
>>
>> That's great! Would you like to commit that back to the IGSTKSandbox?
>>
>> Thank you,
>>
>> Patrick
>>
>> Anka Kochanowska wrote:
>>> Thanks!
>>> Now tracing is lot easier. I copied the changes to trace Polaris 
>>> pointer.
>>>
>>> Anka:-)
>>>
>>>
>>> Patrick Cheng wrote:
>>>> Hi Anka,
>>>>
>>>> I made a few changes to the example application.
>>>> Please check out the cvs code and give it a try.
>>>>
>>>> Below is a brief description of the problem:
>>>>
>>>> Problem: Objects do not show up in the window. Camera unable to find 
>>>> its focus
>>>>
>>>> Cause: This is because of the single thread limit. Tracker hasn't 
>>>> got a chance to update TrackerTool until the
>>>> igstk::PulseGenerator::CheckTimeouts(); get called in the main loop.
>>>>
>>>> If we setup the scene graph connection as:
>>>> object --> tool -x-> tracker <-- View
>>>> View can not reach object thus unable to adjust it's focus when 
>>>> ResetCamera is called.
>>>>
>>>> Solution: Attach the object to the Tracker instead of TrackerTool at 
>>>> startup. Switch to TrackerTool after tracking started.
>>>>
>>>> Results: You should see the ellipsoid and cylinder in the window 
>>>> (constant) at startup.
>>>> After tracking start, you should see them following your mouse 
>>>> position.
>>>> When stop tracking, they will disappear.
>>>>
>>>> Thank you for your support for IGSTK!
>>>>
>>>> Patrick
>>>>
>>>>
>>>> Anka Kochanowska wrote:
>>>>> Hi!
>>>>> Thanks for the clarification.
>>>>> I did not think of it this way. Usually tracking application show 
>>>>> something on start, but you are right - there is no reference, so 
>>>>> nothing to show. There is a call to reset camera in the example, 
>>>>> and I sometimes zoom and zoom and zoom and see nothing, although I 
>>>>> know that my pointer must be visible.
>>>>>
>>>>> Thanks again
>>>>> Anka:-)
>>>>>
>>>>> Andinet Enquobahrie wrote:
>>>>>> Anka-
>>>>>>
>>>>>>> Since there are no changes in the example code, something in 
>>>>>>> IGSTK must have been changed to cause the problems.
>>>>>>>
>>>>>>> So for now, I shall try to work with the release 3.0 again, 
>>>>>>> hoping for a fix in CVS.
>>>>>>>
>>>>>> You are better off sticking working with cvs version. Because, 
>>>>>> there were several other bug fixes....
>>>>>>
>>>>>> I just took a quick look at it your report and here are my comments
>>>>>>
>>>>>> 1) When you start the example application,  you "should NOT see" 
>>>>>> the cylinder and ellipsoid with the tracking turned off.  When 
>>>>>> tracking
>>>>>> is turned off, it means there is no tracking information which 
>>>>>> implies the transforms of the spatial objects are "expired" or
>>>>>> are invalid time stamps. So, what you are currently observing in 
>>>>>> the cvs version is the correct behavior.
>>>>>>
>>>>>> The behavior in  release 3.0 was wrong.  The spatial objects show 
>>>>>> up upon start EVEN without tracking information.
>>>>>> 2) When you turn on tracking, although you will get valid 
>>>>>> transforms and renderings of the cylinder and ellipsoid spatial 
>>>>>> objects,
>>>>>> you will not see the renderings since the camera is way out of 
>>>>>> focus. If you zoom out repeatedly using the right mouse button,
>>>>>> you will see the spatial objects. We might need to add a camera 
>>>>>> reset call to bring the renderings to the the widgets field of view.
>>>>>>
>>>>>>
>>>>>> Hope that helps
>>>>>> -Andinet
>>>>>>
>>>>>>
>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> IGSTK-Users mailing list
>>>>>>> IGSTK-Users at public.kitware.com
>>>>>>> http://public.kitware.com/cgi-bin/mailman/listinfo/igstk-users
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>
> 
>