[vtkusers] vtk.js: display particular cells with alpha/transparency/opacity

[Sebastien Jourdain]

You should be able to have an array with 4 components (RGBA)

On Thu, Dec 13, 2018 at 9:01 AM Raimonds Vilums <raimonds at cenos-platform.com>
wrote:

> Hi,
>
> Is it possible to display cells with custom opacity for each cell?
>
> Till now, I managed
> 1) set opacity to the actor (e.g., actor.getProperty().setOpacity(0.5))
> 2) color cells with solid colors, e.g:
>
>
>    - vtk file contains CELL_DATA array of floats with 3 components for
>    every color
>    -
>
>    mapper.setColorModeToDirectScalars();
>
>    -
>
>    mapper.setScalarModeToUseCellFieldData();
>
>    -
>
>    mapper.setColorByArrayName('my_cell_data');
>
>
> But I could not find a way to set alpha/opacity/transparency for
> particular cells.
> Is it possible?
>
> Regards,
> Raimonds
>
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