VTK/Examples/Cxx/SimpleOperations/GaussianRandomNumber

This example generates 3 random numbers from a Gaussian distribution with mean 0.0 and standard deviation 2.0.

GaussianRandomNumber.cxx

#include <vtkMath.h>
#include <time.h>

int main(int, char *[])
{
  //The number of random numbers we wish to produce
  unsigned int numRand = 3;
  
  //without this line, the random numbers will be the same every iteration
  vtkMath::RandomSeed(time(NULL));
      
  //Generate numRand random numbers from a Gaussian distribution with mean 0.0 and standard deviation 2.0
  for(unsigned int i = 0; i < numRand; i++)
    {
    double a = vtkMath::Gaussian(0.0,2.0);
    std::cout << a << std::endl;
    }
  
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(GaussianRandomNumber)

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

add_executable(GaussianRandomNumber MACOSX_BUNDLE GaussianRandomNumber.cxx)

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

Download and Build GaussianRandomNumber

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

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

cd GaussianRandomNumber/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:

./GaussianRandomNumber

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.