[vtkusers] vtkInteractorStyleTrackballCamera: panning gets heavy then goes into reverse

[Tim Hutton]

Hi Aashish,

Doesn't seem to be - changing the focal point and the other camera
parameters doesn't affect it.

The same issue is present with ParallelProjectionOn.

Our app is running with wxVTK and wxWidgets, so I'm wondering if there's an
issue there somewhere. I'll ask on the wxVTK list. Unless you've any other
ideas I'll try to recreate the problem in a VTK-only window and get back to
you.

Thanks,

Tim


On 15 November 2013 00:02, Aashish Chaudhary
<aashish.chaudhary at kitware.com>wrote:

> is this problem dependent on distance from the focal point?
>
> - Aashish
>
>
> On Thu, Nov 14, 2013 at 6:05 PM, Tim Hutton <tim.hutton at gmail.com> wrote:
>
>> I've an odd problem with panning in vtkInteractorStyleTrackballCamera.
>> Above a certain threshold of complexity, panning (holding down shift and
>> left-dragging) will stop working properly. With more items the scene can no
>> longer be dragged around far enough - it feels like it is has got heavy and
>> stays in the middle. With even more items the panning actually pulls in the
>> opposite direction. Attached an image of such a scene - it's pretty
>> reasonable and renders reasonably fast.
>>
>> I've tested it in VTK 5.10.1 and 6.0.0 and it happens in both.
>>
>> I've tested on Windows 7 and Windows 8 and Linux (Ubuntu 13.10) and
>> strangely it only happens on Windows (both 7 and 8).
>>
>> Has anyone seen this problem before?
>>
>> --
>> Tim Hutton - http://www.sq3.org.uk -
>> http://profiles.google.com/tim.hutton/
>>
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>
>
> --
> | Aashish Chaudhary
> | R&D Engineer
> | Kitware Inc.
> | www.kitware.com
>



-- 
Tim Hutton - http://www.sq3.org.uk - http://profiles.google.com/tim.hutton/
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