I am trying to use vtk to visualize some FE results i got from calculix. I managed to use ccx2paraview to convert to .frd file from calculix to .vtk and now I am trying to follow this example https://examples.vtk.org/site/Python/Visualization/Blow/ to warp the mesh.
My problem is that the example uses vtkWarpVector to warp the mesh as follows:
for i in range(0, 10):
# Create the reader and warp the data vith vectors.
reader.append(vtkDataSetReader())
reader[i].SetFileName(fileName)
reader[i].SetScalarsName(thickness[i])
reader[i].SetVectorsName(displacement[i])
reader[i].Update()
warp.append(vtkWarpVector())
warp[i].SetInputData(reader[i].GetUnstructuredGridOutput())
but when trying to replicate this, it does not work. This is because my results are stored as field data and not vector inside the vtk file.
How could I go around this issue? Is the any way to convert the field data into a magnitude vector? for reference, the displacement vector is stored in my vtk file as 3 component, d1, d2, d3 so the vector i want is simply the displacement magnitude.
If it helps, this is how the data is stored in the blow.vtk file (example):
POINT_DATA 687
VECTORS displacement0 float
0.0 0.0 0.0
0.0 0.0 0.0
0.0 0.0 0.0
0.0 0.0 0.0
…
and this is how its stored in my file:
POINT_DATA 298149
FIELD FieldData 9
U 3 298149 double
-3.31393 0.52466 2.40186 -3.32749 0.540424 2.41069 -0.00141714 0.002697 -0.000773049
-3.29755 0.519481 2.40722 -0.416161 0.163893 -0.521088 -5.22042 -0.0350792 1.82133
-3.33603 0.549571 2.41473 -0.00339442 -0.0140238 -0.00123908 -6.51677 2.50743 -0.236696
-0.162029 0.119017 0.511941 -3.32663 0.545721 2.41214 0.00592114 -0.00767478 -0.0235326
1.40766 0.424938 1.03948 -0.452885 0.56441 2.68806 -2.6386 0.852057 2.59316
-0.755192 -0.318027 1.89794 -3.14142 -1.06202 1.77692 -4.6938 0.203659 2.18789
thanks in advance