RandomSequence

Repository source: RandomSequence

Description¶

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

Other languages

See (Java), (CSharp)

Question

If you have a question about this example, please use the VTK Discourse Forum

Code¶

RandomSequence.cxx

#include <vtkMinimalStandardRandomSequence.h>
#include <vtkNew.h>

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

  // 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 3.12 FATAL_ERROR)

project(RandomSequence)

find_package(VTK COMPONENTS 
  CommonCore
)

if (NOT VTK_FOUND)
  message(FATAL_ERROR "RandomSequence: Unable to find the VTK build folder.")
endif()

# Prevent a "command line is too long" failure in Windows.
set(CMAKE_NINJA_FORCE_RESPONSE_FILE "ON" CACHE BOOL "Force Ninja to use response files.")
add_executable(RandomSequence MACOSX_BUNDLE RandomSequence.cxx )
  target_link_libraries(RandomSequence PRIVATE ${VTK_LIBRARIES}
)
# vtk_module_autoinit is needed
vtk_module_autoinit(
  TARGETS RandomSequence
  MODULES ${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.