[vtkusers] transparency of cubes in voxel data (structured points)

[Marc Niethammer]

Hi,

I would like to visualize voxel data, which is essentially binary (either
a voxel is set = 1, or not set = 0). However, the following code does not
make the black voxels transparent, so that I can see the faces of the
other voxels. Is there any way to prevent this from happening?

Thanks for any help.

-- Marc

%------

source vtkInt.tcl

vtkRenderer ren1
vtkRenderWindow renWin
    renWin AddRenderer ren1
vtkRenderWindowInteractor iren
    iren SetRenderWindow renWin

vtkScalars sc
sc SetNumberOfScalars 8
sc SetScalar 0 0
sc SetScalar 1 1
sc SetScalar 2 1
sc SetScalar 3 1
sc SetScalar 4 1
sc SetScalar 5 1
sc SetScalar 6 1
sc SetScalar 7 1

vtkLookupTable layers
   layers SetNumberOfColors   2
   layers Build
   layers SetTableValue 0 0.0 0.0 0.0 0.0
   layers SetTableValue 1 1.0 0.0 0.0 1.0

vtkStructuredPoints sPts

sPts SetDimensions 3 3 3
[sPts GetCellData] SetScalars sc

vtkDataSetMapper mapperD

mapperD SetInput sPts
mapperD SetLookupTable layers

vtkActor vol
vol SetMapper mapperD

ren1 AddActor vol

renWin Render
iren SetUserMethod {wm deiconify .vtkInteract}
iren Initialize

wm withdraw .

%-------