[vtkusers] Using scalar to colour tensor glyphs

[Faye LAWRENCE]

I have a structured points dataset with both scalar and tensor data (set to 
the points of the dataset).

The aim of my program is to place at each point a tensorglyph, coloured with 
the scalar data.

It is the colour which is the problem....

The scalar data is all in the RGB form with three components, I'm expecting 
the glyphs to be all black, except for six towards the centre which should be 
different shades of purple.

But they are red, blue and black, all through the dataset, the colour is not 
even towards the centre. There does seem to be some pattern as whatever I do 
to the scalar data, the black glyphs are always black, even when I set the 
SetColorGlphs to false. Please see code below....

I have used the same list of scalars before to produce an image again using 
structured points, so I don't understand why there is a difference. In fact 
the code is almost exactly the same except that previously there were no 
Tensors and the scalar data was set to the cells of the dataset.

I don't know whether it is relevant but I am using Java.

If anyone could shed some light on this I would be really grateful. It has 
been plaguing me for four day now and I have made no progress.

Thanks Faye.

CODE:

scalars and tensors are created previously...

spts.GetPointData().SetScalars(scalars); 	   spts.GetPointData().SetTensors(ten
sors);

vtkTensorGlyph ellip = new vtkTensorGlyph();
ellip.SetInput(spts);
ellip.SetSource(sphere.GetOutput());
ellip.SetScaleFactor(0.01);