[vtkusers] how can I scale a vtkActor2D?

[Peter F Bradshaw]

Hi Liang Ma;

Are you calling this->pvtkRenderer->Render() anywhere?

On Mon, 24 Nov 2008, Liang Ma wrote:

> Hi all,
>
> I tried to scale a 2D actor but it doesn't work. I tried GetPosition2Coordinate() function but it doesn't work.  Also I tried to zoom the camera. It does not work either.
>
> Whould you give me some advices? Thanks.
>
> Regards
>
> Liang Ma
>
> Here is the code:
>
>   vtkActor2D   *pvtkActor;
>            ..........................
>  this->pvtkActor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedViewport();
>  this->pvtkActor->GetPositionCoordinate()->SetValue(0.5, 0.5);  //  works, could move the actor to the center
>  this->pvtkActor->GetPosition2Coordinate()->SetValue(0.9, 0.9); // does not work, no effect
>  this->pvtkActor->GetProperty()->SetColor(1, 0, 0);
>
> the code for zoom:
>
> ////////////////////////////////////////////////////////////////////////
>         this->pvtkCamera = this->pvtkRenderer->GetActiveCamera ();
>         this->pvtkCamera->Zoom(5);    //     zoom doesn't work
>         this->pvtkRenderer->SetActiveCamera (this->pvtkCamera) ;
> ///////////////////////////////////////////////////////////////////////////
>

Cheers

-- 
Peter F Bradshaw: http://www.exadios.com (public keys avaliable there).
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