[Ves] ves kiwi visualisation pipelines

[Pat Marion]

Hi Jamie,

Have you looked at vesKiwiImagePlaneDataRepresentation and
vesKiwiImageWidgetRepresentation?

For contouring, you can use the vtkContourFilter on a vtkImageData and get
a vtkPolyData result.  The vtkPolyData is rendered using
vesKiwiPolyDataRepresentation.  Tthe vesKiwiImagePlaneDataRepresentation is
a subclass of vesKiwiPolyDataRepresentation, it takes a 2d vtkImageData and
renders it as a textured quad.  For coloring, see line 120 in
vesKiwiImagePlaneDataRepresentation.  It uses a vesKiwiColorMapCollection
class, which is basically just a container of preferred color maps.  If no
preferred color map is set, then you see on line 122 it defaults to a
grayscale map.  The color map can be any subclass of vtkScalarsToColors, so
that includes a vtkColorTransferFunction is that's what you want to use.

In general, you can use any vtk data filters in ves/kiwi, but you can't use
vtk's rendering classes and widgets, because of the OpenGL ES 2.0
requirement.  Your processing pipeline should eventually generate
vtkPolyData to be rendered.

Pat




On Tue, Jun 3, 2014 at 5:51 PM, Wright James (NHS Greater Glasgow & Clyde) <
jamie.wright at nhs.net> wrote:

> Dear All,
>
> I am looking through the vesKiwi*.cpp source code in an attempt to figure
> out the various visualisation pipelines used on the inbuilt datasets on
> KiwiViewer. I cannot find where the visualisation pipelines take place on
> each of the inbuilt datasets.
>
> For Example, in VTK desktop for the headCT dataset I would use something
> like vtkImagePlaneWidget() to slice the data into the three orthogonal
> planes, a vtkColorTransferFunction() to set the color table to greyscale,
> and a vtkContourFilter() to extract the isosurface. But I don't seem to be
> able to find this pipeline in the kiwi source files.
>
> Any help on understanding how each of the datasets are processed would be
> appreciated
>
>
>
> Jamie Wright | Clinical Scientist | Nuclear Medicine | NHSGGC
>
>
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