C++ VTK实例之高斯随机数的生成

来源：jb51　　时间：2021/11/24 12:48:16　　对本文有异议

VTK实例高斯随机数的生成

这个例子演示了从一个平均数是0.0和标准偏差是2.2的高斯分布中随机生成3个随机数。先创建两个文件：GaussianRandomNumber.cpp和CMakeLists.txt。

代码如下：

GaussianRandomNumber.cxx

#include <vtkBoxMuellerRandomSequence.h>
#include <vtkNew.h>
 
int main(int, char*[])
{
  // The number of random numbers we wish to produce
  unsigned int numRand = 3;
 
  vtkNew<vtkBoxMuellerRandomSequence> randomSequence;
 
  // Generate numRand random numbers from a Gaussian distribution with mean 0.0
  // and standard deviation 2.2
  auto mean = 0.0;
  auto standardDeviation = 2.2;
  for (unsigned int i = 0; i < numRand; i++)
  {
    auto a = randomSequence->GetScaledValue(mean, standardDeviation);
    randomSequence->Next();
    std::cout << a << std::endl;
  }
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
 
project(GaussianRandomNumber)
 
find_package(VTK COMPONENTS 
  vtkCommonCore
  QUIET
)
 
if (NOT VTK_FOUND)
  message("Skipping GaussianRandomNumber: ${VTK_NOT_FOUND_MESSAGE}")
  return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
  # old system
  include(${VTK_USE_FILE})
  add_executable(GaussianRandomNumber MACOSX_BUNDLE GaussianRandomNumber.cxx )
  target_link_libraries(GaussianRandomNumber PRIVATE ${VTK_LIBRARIES})
else ()
  # include all components
  add_executable(GaussianRandomNumber MACOSX_BUNDLE GaussianRandomNumber.cxx )
  target_link_libraries(GaussianRandomNumber PRIVATE ${VTK_LIBRARIES})
  # vtk_module_autoinit is needed
  vtk_module_autoinit(
    TARGETS GaussianRandomNumber
    MODULES ${VTK_LIBRARIES}
    )
endif ()