[vtkusers] Problem with streamline

[Mohammad Nazrul Islam]

Hi all.
I have position vector file and i want to use these to plot a streamline and using this code but not getting result.Please help me to find the problem in the following code:

 vector=vtk.vtkFloatArray()
 vector.SetNumberOfComponents(3)
 vector.SetNumberOfTuples(lines)
 
 slineGrid=vtk.vtkUnstructuredGrid()
 slineGrid.SetPoints(points)
 slineGrid.GetPointData().SetVectors(vector)

 delny = vtk.vtkDelaunay3D()
 delny.SetInput(slineGrid)
 delny.SetTolerance(0.1)
 delny.SetAlpha(0.5)
 delny.BoundingTriangulationOff()
 
 line=vtk.vtkLineSource()
 line.SetResolution(25)

 integ=vtk.vtkRungeKutta4()
 streamline=vtk.vtkStreamTracer()
 streamline.SetInputConnection(delny.GetOutputPort()) 
 streamline.SetSource(line.GetOutput())
 streamline.SetMaximumPropagation(500)
 streamline.SetMaximumPropagationUnitToTimeUnit()
 streamline.SetInitialIntegrationStep(0.5)
 streamline.SetInitialIntegrationStepUnitToCellLengthUnit()
 streamline.SetIntegrationDirectionToBoth()
 streamline.SetIntegrator(integ)


 and then mapper, actor and rendering stuff. Could anybody  help me?

Thanks and br,
Nazrul