[vtkusers] vtkWindowToImageFilter - black image

[Fredrik]

Hi Scott, thanks for the reply. Unfortunately it didn't help. I think I
remember some other thread with the "ShouldRerender" flag, but I think that
mentioned it should be windowToImageFilter.ShouldRerenderOff();
, not on. I tried both anyway, but no change

All the best,
Fredrik

2015-06-09 17:33 GMT+02:00 Scott Wittenburg <scott.wittenburg at kitware.com>:

> Hi Frederik,
>
>    I believe I have encountered this before.  What solved it for me was
> turning on the "ShouldRerender" flag in addition to what you have set.
> Something like:
>
> windowToImageFilter.ShouldRerenderOn();
>
> could possibly help.
>
> Cheers,
> Scott
>
>
>
> On Tue, Jun 9, 2015 at 9:02 AM, Fredrik <frejon at gmail.com> wrote:
>
>> Hello. There are several threads on this topic, and the few I see, the
>> proposed solutions are not enough or the thread is left unresolved. see
>> this:
>>
>> http://public.kitware.com/pipermail/vtkusers/2014-October/085358.html
>> http://public.kitware.com/pipermail/vtkusers/2014-October/085294.html
>>
>> I still am unable to generate anything else than a black image.
>> I'm on the latest VTK, under Mac OS X 10.10.  I also tried offscreen
>> rendering, but no luck.
>>
>> Hours of googling and testing solutions have proven unsuccessful, I'd
>> really appreciate if anyone could help me.
>>
>> here's a snippet of my code if you think it'll help
>>
>>         tempFile = "xyz.bmp";
>>         // write to temporary bmp file
>>         vtkBMPWriter writer = new vtkBMPWriter();
>>         vtkWindowToImageFilter windowToImageFilter = new
>> vtkWindowToImageFilter();
>>         windowToImageFilter.ReadFrontBufferOff();
>>         windowToImageFilter.SetMagnification(1);
>>         windowToImageFilter.SetInput(renderWindow);
>>         windowToImageFilter.SetInputBufferTypeToRGBA();
>>         windowToImageFilter.ReadFrontBufferOff();
>>
>>         windowToImageFilter.Update();
>>
>>         windowToImageFilter.ReadFrontBufferOff();
>>         writer.SetInputConnection(windowToImageFilter.GetOutputPort());
>>         writer.SetFileName(tempFile);
>>         writer.Write();
>>
>>
>>
>> Kind Regards, Fredrik
>>
>>
>>
>>
>>
>>
>>
>>
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