VTK/Examples/Cxx/Utilities/VectorArrayKnownLength

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This example creates a VTK style float array of vectors. This can be easily interchanged with vtkIntArray, vtkDoubleArray, etc.

VectorArrayKnownLength.cxx

#include <vtkSmartPointer.h>
#include <vtkFloatArray.h>

int main(int, char *[])
{
  vtkSmartPointer<vtkFloatArray> distances =
    vtkSmartPointer<vtkFloatArray>::New();
  distances->SetName("Distances");
  distances->SetNumberOfComponents(3);
  distances->SetNumberOfTuples(5);

  //set values
  for(vtkIdType i = 0; i < distances->GetNumberOfTuples(); i++)
    {
    float tuple[3];
    tuple[0] = (float)i + 0.1;
    tuple[1] = (float)i + 0.2;
    tuple[2] = (float)i + 0.3;
    distances->SetTuple(i, tuple);
    }

  //get values
  for(vtkIdType i = 0; i < distances->GetNumberOfTuples(); i++)
    {
    double d[3];
    distances->GetTuple(i, d);
    std::cout << d[0] << " " << d[1] << " " << d[2] << std::endl;
    }

  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(VectorArrayKnownLength)

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

add_executable(VectorArrayKnownLength MACOSX_BUNDLE VectorArrayKnownLength.cxx)

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

Download and Build VectorArrayKnownLength

Click here to download VectorArrayKnownLength. and its CMakeLists.txt file.

Once the tarball VectorArrayKnownLength.tar has been downloaded and extracted,

cd VectorArrayKnownLength/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:

./VectorArrayKnownLength

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.