Hi, Benoît, This is a bug. We will fix it soon. I have opened a bug based on your report: http://vtk.org/Bug/view.php?id=13236
The basic problem is that vertices of high order elements with the same coordinates are always merged before rending ( by vtkUnstructuredGridGeometryFilter). This is not the right behaviour. thanks for catching it! Leo On Mon, Jun 4, 2012 at 1:40 PM, Benoît Pouliot <[email protected]> wrote: > 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 > > --------------------------------------------c----------------- > # 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 > ------------------------------------------------------------- > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview
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