# RandomSequence

VTKExamples/Cxx/SimpleOperations/RandomSequence

### Description

This is the "new" (December, 2009) VTK way to produce random numbers. It is actually a random sequence generator.

Other Languages

See (CSharp)

### Code

RandomSequence.cxx

    #include <vtkMinimalStandardRandomSequence.h>
    #include <vtkSmartPointer.h>

    int main(int, char *[])
    {
      //Create a random sequence generator.
      vtkSmartPointer<vtkMinimalStandardRandomSequence> sequence =
          vtkSmartPointer<vtkMinimalStandardRandomSequence>::New();

      // initialize the sequence
      sequence->SetSeed(1);

      //Get 3 random numbers.
      double x = sequence->GetValue();
      sequence->Next();
      double y = sequence->GetValue();
      sequence->Next();
      double z = sequence->GetValue();

      // You can also use seq->GetRangeValue(-1.0,1.0);
      //to set a range on the random values.

      //Output the resulting random numbersl
      std::cout << "x: " << x << " y: " << y << " z: " << z << std::endl;

      return EXIT_SUCCESS;
    }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(RandomSequence)

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

    add_executable(RandomSequence MACOSX_BUNDLE RandomSequence.cxx )

    target_link_libraries(RandomSequence ${VTK_LIBRARIES})

### Download and Build RandomSequence

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

    cd RandomSequence/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:

    ./RandomSequence

WINDOWS USERS

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