VTK/Examples/Cxx/PolyData/ColorCells

#include <vtkSmartPointer.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
 
#include <vtkLookupTable.h>
#include <vtkFloatArray.h>
#include <vtkCellData.h>
#include <vtkPolyData.h>
#include <vtkPlaneSource.h>
 
int main(int , char *[])
{
  // Provide some geometry
  int resolution = 3;
  vtkSmartPointer<vtkPlaneSource> aPlane =
    vtkSmartPointer<vtkPlaneSource>::New();
  aPlane->SetXResolution(resolution);
  aPlane->SetYResolution(resolution);
 
  // Create cell data
  vtkSmartPointer<vtkFloatArray> cellData =
    vtkSmartPointer<vtkFloatArray>::New();
  for (int i = 0; i < resolution * resolution; i++)
    {
    cellData->InsertNextValue(i + 1);
    }
 
  // Create a lookup table to map cell data to colors
  vtkSmartPointer<vtkLookupTable> lut =
    vtkSmartPointer<vtkLookupTable>::New();
  int tableSize = std::max(resolution*resolution + 1, 10);
  lut->SetNumberOfTableValues(tableSize);
  lut->Build();
 
  // Fill in a few known colors, the rest will be generated if needed
  lut->SetTableValue(0     , 0     , 0     , 0, 1);  //Black
  lut->SetTableValue(1, 0.8900, 0.8100, 0.3400, 1); // Banana
  lut->SetTableValue(2, 1.0000, 0.3882, 0.2784, 1); // Tomato
  lut->SetTableValue(3, 0.9608, 0.8706, 0.7020, 1); // Wheat
  lut->SetTableValue(4, 0.9020, 0.9020, 0.9804, 1); // Lavender
  lut->SetTableValue(5, 1.0000, 0.4900, 0.2500, 1); // Flesh
  lut->SetTableValue(6, 0.5300, 0.1500, 0.3400, 1); // Raspberry
  lut->SetTableValue(7, 0.9804, 0.5020, 0.4471, 1); // Salmon
  lut->SetTableValue(8, 0.7400, 0.9900, 0.7900, 1); // Mint
  lut->SetTableValue(9, 0.2000, 0.6300, 0.7900, 1); // Peacock
 
  aPlane->Update(); // Force an update so we can set cell data
  aPlane->GetOutput()->GetCellData()->SetScalars(cellData);
 
  // Setup actor and mapper
  vtkSmartPointer<vtkPolyDataMapper> mapper =
    vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(aPlane->GetOutputPort());
  mapper->SetScalarRange(0, tableSize - 1);
  mapper->SetLookupTable(lut);
 
  vtkSmartPointer<vtkActor> actor =
    vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
 
  // Setup render window, renderer, and interactor
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
      vtkSmartPointer<vtkRenderWindowInteractor>::New();
  renderWindowInteractor->SetRenderWindow(renderWindow);
  renderer->AddActor(actor);
  renderer->SetBackground(.1,.2,.3);
  renderWindow->Render();
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}