[vtkusers] unstructured grid visualization problem

[nikhil butala]

Dear vtk-users,
 
                   I am a newbie with vtk and am trying to read 3D tetrahedral mesh from FEA softwares into VTK. 
I converted the FEA mesh into vtk format. I am first trying to read simple mesh of a cube. The input vtk file is as follows:

# vtk DataFile Version 2.0

Trial

ASCII 



DATASET UNSTRUCTURED_GRID 

POINTS 10 float 

-1 1 2 

-1 1 0 

-1 -1 2 

-1 -1 0 

1 -1 2 

1 -1 0 

1 1 2 

1 1 0 

0.400316 0.171597 0.759397 

-0.099509 -0.159484 1.126592 

CELLS 16 80

4 7 1 10 2 

4 9 8 2 6 

4 10 1 5 3 

4 10 7 5 1 

4 7 2 10 9 

4 10 9 5 7 

4 6 9 10 2 

4 8 6 9 5 

4 8 5 9 7 

4 8 7 9 2 

4 6 5 3 10 

4 6 2 10 4 

4 10 4 2 1 

4 4 1 10 3 

4 6 10 3 4 

4 6 5 10 9 

CELL_TYPES 16 

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

10

 
I am reading the vtk file using the following code:
 
package require vtk

vtkUnstructuredGridReader reader
    reader SetFileName "$DataSource/outputfile2.vtk"

vtkDataSetMapper mapper
    mapper SetInput [reader GetOutput]
   
vtkActor actor
   actor SetMapper mapper
    [actor GetProperty] SetColor .2 .2 .2
    [actor GetProperty] SetRepresentationToWireframe
vtkExtractUnstructuredGrid extractGrid
    extractGrid SetInput [reader GetOutput]
  
    
# graphics stuff
vtkRenderer ren1
vtkRenderWindow renWin
    renWin AddRenderer ren1
vtkRenderWindowInteractor iren
    iren SetRenderWindow renWin
# Add the actors to the renderer, set the background and size
#
ren1 AddActor actor
ren1 SetBackground 1 1 1
[ren1 GetActiveCamera] Azimuth 60
[ren1 GetActiveCamera] Roll -90
[ren1 GetActiveCamera] Dolly 2
ren1 ResetCameraClippingRange
renWin SetSize 500 375
iren Initialize
# prevent the tk window from showing up then start the event loop
wm withdraw .
 
The output visualization of the mesh is not as expected. I are not able to see the outer bounds of the cube. Can anyone help me and tell why this problem is arising???
 
thanking you,
regards,
Nikhil Butala

 

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