[vtkusers] Volume Rendering Gradient Opacity Value Range

[Aashish Chaudhary]

Hi Serseri,

In many ways it depends on your data and what you are trying to visualize.
Depending on the dataset, you would likely to know the range of data values
and general idea on where you are expecting to see bigger or smaller change
in gradients. Mostly, I have seen that a interactive editor is most useful
for the users. I am not aware of any existing code in VTK to give you a
better idea.

Thanks,


On Sun, Feb 14, 2016 at 9:35 AM, serseri <serhattural12 at gmail.com> wrote:

> Hi,
>
> How can I get the value range of gradient values to use on volume
> rendering?
> I try to find optimal values for my samples.
>
> An example usega of gradient opacity function:
>
> http://www.paraview.org/Wiki/VTK/Examples/Cxx/Visualization/RenderPassExistingContext
>
> vtkPiecewiseFunction * volumeGradientOpacity = vtkPiecewiseFunction::New();
> volumeGradientOpacity->AddPoint(0,   0.0);
> volumeGradientOpacity->AddPoint(90,  0.5);
> volumeGradientOpacity->AddPoint(100, 1.0);
> volumeProperty->SetGradientOpacity(volumeGradientOpacity);
>
> Thanks.
>
>
>
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-- 



*| Aashish Chaudhary | Technical Leader         | Kitware Inc.            *
*| http://www.kitware.com/company/team/chaudhary.html
<http://www.kitware.com/company/team/chaudhary.html>*
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