[vtkusers] Polydata sometimes just shown after moving mousewheel

[Marc Huber]

Sorry to start this again.
Reseting the camera solves the problem but then I am at the original 
point of the camera again.
What I wanted was to transform the camera and stay at this place to take 
screenshots.
When I repaint my RendererWindow not all content is redrawn. After I 
move the mousewheel it's correctly displayed.
The problem doesn't occur always. Just with some objects with specific 
transformations.
I have attached a screenshot what the problem is. The upper window is 
how it is created and the lower is after I moved the mouse wheel.
I tried to just perform a zoom event and it doesn't help.

Best regards
Marc

Am 4/16/2013 2:28 PM, schrieb Marc Huber:
> thx! Reset the camera again after its movement solved the problem.
>
> Am 4/16/2013 1:58 PM, schrieb David Doria:
>> On Tue, Apr 16, 2013 at 7:34 AM, Marc Huber <marchuber.hft at gmx.de> 
>> wrote:
>>> Hi,
>>>
>>> i have the problem, that if i load polydata to a renderer window 
>>> depending
>>> on the dataset sometimes the object is shown directly and sometimes 
>>> i have
>>> to move the mousewheel one time and then the object gets visible.
>>> For each object my camera is set depending on the center point of my
>>> polydata.
>>> I do a repaint but it doesn't help me.
>>>
>>> Has anyone an idea what the problem might be?
>>> Or can someone just tell me how i perform a simple event zooming in 
>>> or out
>>> one time?
>>>
>>> My Code:
>>>      double cent[3], bounds[6], lenX, lenY, lenZ, max;
>>>      stlActor->GetMapper()->GetCenter(cent);
>>>      stlActor->GetMapper()->GetBounds(bounds);
>>>      lenX=bounds[1]-bounds[0];
>>>      lenY=bounds[3]-bounds[2];
>>>      lenZ=bounds[5]-bounds[4];
>>>      max=lenX;
>>>      if (lenY > max) {max=lenY;}
>>>      if (lenZ > max) {max=lenZ;}
>>>
>>>      cam->SetFocalPoint(cent[0],cent[1],cent[2]);
>>>      cam->SetViewUp(0,0,1);
>>>      cam->SetPosition(-2*max,0,0);
>>>      if (direction==0)  //azimuth
>>>      {
>>>          cam->Azimuth(degree);
>>>      }
>>>      else if (direction==1) //elevation
>>>      {
>>>          cam->Elevation(degree);
>>>      }
>>>      renderer->SetActiveCamera(cam);
>>>      ui.qvtkWidget->repaint();
>>
>> Did you try renderer->ResetCamera()? Otherwise, please post compilable
>> code that demonstrates the problem. The code should be as simple as
>> possible (remove the Qt dependency, hard code data to view, etc.)
>>
>> David
>>
>
>


-- 
Best regards / Mit freundlichen Grüßen
Marc Huber

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