ArrayRange

VTKExamples/Cxx/Utilities/ArrayRange

Code

ArrayRange.cxx

#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;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(ArrayRange)

find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

add_executable(ArrayRange MACOSX_BUNDLE ArrayRange.cxx )

target_link_libraries(ArrayRange ${VTK_LIBRARIES})

Download and Build ArrayRange

Click here to download ArrayRange and its CMakeLists.txt file. Once the tarball ArrayRange.tar has been downloaded and extracted,

cd ArrayRange/build 

If VTK is installed:

cmake ..

If VTK is not installed but compiled on your system, you will need to specify the path to your VTK build:

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./ArrayRange

WINDOWS USERS

Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.