VTK/Examples/Cxx/Utilities/ArrayRange

#include <vtkSmartPointer.h>
#include <vtkFloatArray.h>
#include <vtkIntArray.h>
 
int main(int, char *[])
{
  /////////// Floats ///////////
  {
  vtkSmartPointer<vtkFloatArray> distances =
    vtkSmartPointer<vtkFloatArray>::New();
  distances->SetNumberOfComponents(1);
  distances->SetName("Distances");
 
  distances->InsertNextValue(5);
  distances->InsertNextValue(15);
  distances->InsertNextValue(25);
 
  // Get min and max
  double range[2];
  distances->GetRange(range);
  std::cout << "range = " << range[0] << " " << range[1] << std::endl;
  }
 
  /////////////// Ints //////////////
  {
  vtkSmartPointer<vtkIntArray> ints =
    vtkSmartPointer<vtkIntArray>::New();
  ints->SetNumberOfComponents(1);
  ints->SetName("Ints");
 
  ints->InsertNextValue(5);
  ints->InsertNextValue(15);
  ints->InsertNextValue(25);
 
  // Get min and max
  int valuesRange[2];
  ints->GetValueRange(valuesRange); // Note this is not GetRange()!
  std::cout << "valuesRange = " << valuesRange[0] << " " << valuesRange[1] << std::endl;
  }
 
  /////////// Range with negative values ///////////
  {
  vtkSmartPointer<vtkIntArray> ints =
    vtkSmartPointer<vtkIntArray>::New();
  ints->SetNumberOfComponents(1);
  ints->SetName("Ints");
 
  ints->InsertNextValue(-50);
  ints->InsertNextValue(15);
  ints->InsertNextValue(25);
 
  // Get min and max
  int valuesRange[2];
  ints->GetValueRange(valuesRange); // Note this is not GetRange()!
  std::cout << "valuesRange = " << valuesRange[0] << " " << valuesRange[1] << std::endl;
  }
 
  /////////// Magnitude range ///////////
  {
  vtkSmartPointer<vtkIntArray> ints =
    vtkSmartPointer<vtkIntArray>::New();
  ints->SetNumberOfComponents(1);
  ints->SetName("Ints");
 
  ints->InsertNextValue(-50);
  ints->InsertNextValue(15);
  ints->InsertNextValue(25);
 
  // Get min and max
  int valuesRange[2];
  ints->GetValueRange(valuesRange, -1);
  std::cout << "valuesRange = " << valuesRange[0] << " " << valuesRange[1] << std::endl;
  }
  return EXIT_SUCCESS;
}