[vtkusers] Multi block data set for rectilinear grid.

[kenichiro yoshimi]

Hi,

I think it is always necessary to extract surface geometry for
composite non-polydata sets by vtkCompositeDataGeometryFilter before
applying vtkCompositePolyDataMapper2.

  mbDataSet->SetNumberOfBlocks(1);
  mbDataSet->SetBlock(0, grid);
  VTK_CREATE(vtkCompositeDataGeometryFilter, surface);
  surface->SetInputData(mbDataSet);

  compMapper->SetInputConnection(surface->GetOutputPort());
  compMapper->SetCompositeDataDisplayAttributes(dataDispAttrib);

Regards,
2018年9月26日(水) 18:57 Zoltan Kovacs <Zoltan.Kovacs at esi-group.com>:
>
> Dear all,
>
>
>
> I have an issue with handling multiblock data of a rectilinear grid. I found an example program to plot the rectilinear grid. I modified this example
>
> by inserting some lines which create one block for the grid in a multiblock data set. If I run the example with the original poly data mapper then
>
> it shows the grid.
>
> However if  I comment out the line
>
> wireActor->SetMapper(gridMapper);
>
> and I use the line
>
> wireActor->SetMapper(compMapper);
>
> for the multiblock data mapper then no grid appears in the scene. Is it possible that the class vtkCompositePolyDataMapper2 cannot handle data sets and some  composite data set mapper is needed for it? I could not find any composite mapper for general data sets. Thanks for your help.
>
>
>
> Kind regards,
>
> Zoltan
>
>
>
>
>
> #include "vtkPolyData.h"
>
> #include "vtkPolyDataMapper.h"
>
> #include "vtkDataSetMapper.h"
>
> #include "vtkActor.h"
>
> #include "vtkRenderer.h"
>
> #include "vtkRenderWindow.h"
>
> #include "vtkRenderWindowInteractor.h"
>
> #include "vtkProperty.h"
>
> #include "vtkNamedColors.h"
>
> #include "vtkPointData.h"
>
> #include "vtkDataArray.h"
>
> #include "vtkFloatArray.h"
>
> #include "vtkRectilinearGrid.h"
>
> #include "vtkMultiBlockDataSet.h"
>
> #include "vtkCompositePolyDataMapper2.h"
>
> #include "vtkCompositeDataDisplayAttributes.h"
>
>
>
> #define VTK_CREATE(type,name)  \
>
> vtkSmartPointer<type> name = vtkSmartPointer<type>::New()
>
> #define VTK_INCOM(out,in) out->SetInputConnection(in->GetOutputPort())
>
>
>
> int main( int argc, char *argv[] )
>
> {
>
>   float x[] = {
>
>     -1.22396, -1.17188, -1.11979, -1.06771, -1.01562, -0.963542,
>
>     -0.911458, -0.859375, -0.807292, -0.755208, -0.703125, -0.651042,
>
>     -0.598958, -0.546875, -0.494792, -0.442708, -0.390625, -0.338542,
>
>     -0.286458, -0.234375, -0.182292, -0.130209, -0.078125, -0.026042,
>
>     0.0260415, 0.078125, 0.130208, 0.182291, 0.234375, 0.286458,
>
>     0.338542, 0.390625, 0.442708, 0.494792, 0.546875, 0.598958,
>
>     0.651042, 0.703125, 0.755208, 0.807292, 0.859375, 0.911458,
>
>     0.963542, 1.01562, 1.06771, 1.11979, 1.17188, -100};
>
>
>
>   float y[] = {
>
>     -1.25, -1.17188, -1.09375, -1.01562, -0.9375, -0.859375,
>
>     -0.78125, -0.703125, -0.625, -0.546875, -0.46875, -0.390625,
>
>     -0.3125, -0.234375, -0.15625, -0.078125, 0, 0.078125,
>
>     0.15625, 0.234375, 0.3125, 0.390625, 0.46875, 0.546875,
>
>     0.625, 0.703125, 0.78125, 0.859375, 0.9375, 1.01562,
>
>     1.09375, 1.17188, 1.25, -100 };
>
>
>
>   float z[] = {
>
>     0, 0.1, 0.2, 0.3, 0.4, 0.5,
>
>     0.6, 0.7, 0.75, 0.8, 0.9, 1,
>
>     1.1, 1.2, 1.3, 1.4, 1.5, 1.6,
>
>     1.7, 1.75, 1.8, 1.9, 2, 2.1,
>
>     2.2, 2.3, 2.4, 2.5, 2.6, 2.7,
>
>     2.75, 2.8, 2.9, 3, 3.1, 3.2,
>
>     3.3, 3.4, 3.5, 3.6, 3.7, 3.75,
>
>     3.8, 3.9, -100 };
>
>
>
>   VTK_CREATE(vtkRenderer, renderer);
>
>   VTK_CREATE(vtkRenderWindow, renderWindow);
>
>   VTK_CREATE(vtkRenderWindowInteractor, renderWindowInteractor);
>
>   VTK_CREATE(vtkDataSetMapper, gridMapper);
>
>   VTK_CREATE(vtkActor, wireActor);
>
>   VTK_CREATE(vtkFloatArray, xCoords);
>
>   VTK_CREATE(vtkFloatArray, yCoords);
>
>   VTK_CREATE(vtkFloatArray, zCoords);
>
>   VTK_CREATE(vtkRectilinearGrid, grid);
>
>   VTK_CREATE(vtkMultiBlockDataSet, mbDataSet);
>
>   VTK_CREATE(vtkCompositePolyDataMapper2, compMapper);
>
>   VTK_CREATE(vtkCompositeDataDisplayAttributes, dataDispAttrib);
>
>
>
>   int i = 0;
>
>   while(x[i] > -99)
>
>      xCoords->InsertNextValue(x[i++]);
>
>   int j = 0;
>
>   while(y[j] > -99)
>
>      yCoords->InsertNextValue(y[j++]);
>
>
>
>   int k = 0;
>
>   while(z[k] > -99)
>
>      zCoords->InsertNextValue(z[k++]);
>
>
>
>   grid->SetDimensions(i-1, j-1, k-1);
>
>   grid->SetXCoordinates(xCoords);
>
>   grid->SetYCoordinates(yCoords);
>
>   grid->SetZCoordinates(zCoords);
>
>   gridMapper->SetInputData(grid);
>
>
>
>   mbDataSet->SetNumberOfBlocks(1);
>
>   mbDataSet->SetBlock(0, grid);
>
>
>
>   compMapper->SetInputDataObject(mbDataSet);
>
>   compMapper->SetCompositeDataDisplayAttributes(dataDispAttrib);
>
>
>
>   wireActor->SetMapper(gridMapper);
>
>   //wireActor->SetMapper(compMapper);
>
>   wireActor->GetProperty()->SetRepresentationToWireframe();
>
>
>
>   renderWindow->AddRenderer(renderer);
>
>   renderWindowInteractor->SetRenderWindow(renderWindow);
>
>
>
>   renderer->AddActor(wireActor);
>
>   renderer->SetBackground(.3, .6, .3);
>
>
>
>   renderWindow->Render();
>
>   renderWindowInteractor->Start();
>
> }
>
>
>
>
>
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