[vtkusers] Coloring vector components as RGB

[Pelt, R.F.P. van]

Hi all,

 

I'm currently working with a vtkImageData, containing single component
scalar values

and a vector field. I've been playing around with vtkGlyph3D to get some
arrows plotted.

 

I would like to have the arrows colored where the x, y and z components
are mapped to R,G,B colors.

This seems a trivial thing to do, but unfortunately I cannot find how to
do this using VTK.

(By default VTK tends to be using LUTs and scalar mappings as far as I
can tell)

 

Can anyone please help me to get this fixed?

 

Furthermore I would like to have a vtkImagePlane slicing through the
volume, where the texture on

the plane should also map the vector components to RGB. I have similar
problem with this.

 

Any help is really appreciated.

 

Regards,

 

Roy

 

//----------------------------------------------------------------------
---------------------------

arrow2D = vtkGlyphSource2D::New();

arrow2D->SetGlyphTypeToArrow();

arrow2D->FilledOff();

glyph = arrow2D->GetOutput();                    

 

// Create the glyphFilter with a certain threshold set

vtkThresholdPoints *thresholdPoints = vtkThresholdPoints::New();

thresholdPoints->SetInput(data);

thresholdPoints->ThresholdByUpper(threshold);

 

vtkMaskPoints  *maskPoints = vtkMaskPoints::New();

maskPoints->SetInput(thresholdPoints->GetOutput());

maskPoints->SetOnRatio(10);

 

vtkGlyph3D     *glyphFilter = vtkGlyph3D::New();

glyphFilter->SetInput(maskPoints->GetOutput());

glyphFilter->SetSource(glyph);

glyphFilter->SetVectorModeToUseVector();

glyphFilter->SetScaleFactor(0.005);

glyphFilter->OrientOn();

 

// Create the glyphMapper

vtkPolyDataMapper *glyphMapper = vtkPolyDataMapper::New();  

glyphMapper->SetInput(glyphFilter->GetOutput());

 

// Configure the glyphActor

if(glyphActor == NULL) glyphActor = vtkActor::New();

glyphActor->SetMapper(glyphMapper);

//----------------------------------------------------------------------
---------------------------

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20081019/ac71c108/attachment.htm>