C++VTK实例之高斯随机数的生成

2024-04-02 19:55

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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 ()

编译

将以上两个文件放在自定义文件夹里，再新建一个build目录，用于存放编译后生成的文件。打开CMake程序，编译设置界面如下：