[vtkusers] how can I scale a vtkActor2D?

[Paulo Henrique Junqueira Amorim]

Hi,

I have to add a vtkImageData in a vtkXYPlotActor?


Regards,
Paulo Amorim




2008/11/25 Paulo Henrique Junqueira Amorim <paulojamorim at gmail.com>

> Hi,
>
> I have to add a vtkImageData in a vtkXYPlotActor?
>
>
> Regards,
> Paulo Amorim
>
>
>
> 2008/11/25 Liang Ma <leo at esit.com>
>
> Dear Peter,
>>
>> Thank you so much for your reply. I did try  this->pvtkRenderer->Render()
>> after     this->pvtkRenderer->AddActor(this->pvtkActor); It does not work.
>>
>> my pvtkActor is a vtkActor2D:
>>
>>  vtkActor2D            *pvtkActor2D;
>>
>> In fact  this->pvtkActor->GetPositionCoordinate()->SetValue(0.5, 0.5);
>> will move the actor to the center. But
>> this->pvtkActor->GetPosition2Coordinate()->SetValue(0.9, 0.9);  will not
>> scale the actor.
>>
>> I searched in the archive of  vtkuser and could not fond the answer. I
>> read from the help that  vtkActor2D->GetPosition2Coordinate()->SetValue
>> sometims will not work "Some 2D actor subclasses ignore the position2
>> variable ". But I do not know why. Will a vtkXYPlotActor be better? I can
>> change the size of the font in the same program.Whould you please give me
>> some more advices? Thanks again.
>>
>> Best regards
>>
>> Liang Ma
>>
>>
>>
>> ----- Original Message ----- From: "Peter F Bradshaw" <pfb at exadios.com>
>> To: "VTK Users" <vtkusers at vtk.org>
>> Sent: Tuesday, November 25, 2008 11:15 AM
>> Subject: Re: [vtkusers] how can I scale a vtkActor2D?
>>
>>
>>
>>  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).
>>> Personal site: http://personal.exadios.com
>>> "I love truth, and the way the government still uses it occasionally to
>>> keep us guessing." - Sam Kekovich.
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>>
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>
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