VTK/Examples/Cxx/Utilities/ArrayRange

From KitwarePublic
< VTK‎ | Examples‎ | Cxx
Jump to: navigation, search

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;
}

Please try the new VTKExamples website.

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)
 
if(VTK_LIBRARIES)
  target_link_libraries(ArrayRange ${VTK_LIBRARIES})
else()
  target_link_libraries(ArrayRange vtkHybrid vtkWidgets)
endif()

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