[Paraview] Bug? VTK_QUADRATIC_EDGE

[Benoît Pouliot]

Hi,

I have an issue with the non-linear cell type VTK_QUADRATIC_EDGE.
In an unstructured grid, I made two disjoints VTK_QUADRATIC_EDGE with a SCALARS POINT_DATA (scalar field)
of value 1.0 on one and 0.0 on the other.
My problem comes when the two VTK_QUADRATIC_EDGE overlay on one vertex. 
In this case, Paraview seems to transform the discountinuous field in a continuous one.

To test this issue, I suggest you run my two little tests below. (In Legacy style)
I'm wondering if this is a Bug or a normal behavior?

REMARK:
This issue doesn't appear with the linear cell type VTK_LINE!


Thank you for your answers.
Benoît Pouliot

-------------------------------------------------------------
# vtk DataFile Version 2.0
Test 1 : disjoints VTK_QUADRATIC_EDGE : one vertex in common
ASCII
DATASET UNSTRUCTURED_GRID
POINTS 6 float 
0   0   0
0.5 0   0
1   0   0
1   1   0
.5  0.5 0
0   0   0
CELLS 2 8
3 0 2 1
3 5 3 4
CELL_TYPES 2
21
21
POINT_DATA 6
SCALARS scalars float 1
LOOKUP_TABLE default
1.0
1.0
1.0
0.0
0.0
0.0
-------------------------------------------------------------
# vtk DataFile Version 2.0
Test 2 : disjoints VTK_QUADRATIC_EDGE : no vertex in common
ASCII
DATASET UNSTRUCTURED_GRID
POINTS 6 float 
0   0   0
0.5 0   0
1   0   0
1   1   0
.5  0.5 0
0.00000000001   0   0
CELLS 2 8
3 0 2 1
3 5 3 4
CELL_TYPES 2
21
21
POINT_DATA 6
SCALARS scalars float 1
LOOKUP_TABLE default
1.0
1.0
1.0
0.0
0.0
0.0
-------------------------------------------------------------