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C++ VTK 生成高斯随机数

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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:

调试

在刚刚生成的build目录下,以管理员身份打开vs2019,再打开.sln文件,点击build生成解决方案,如下图:

并将GaussianRandomNumber设为启动项,

进行本地调试,生成三个随机数:

//注:确保将VTK bin目录添加到路径中,这将在运行时解析VTK 的dll文件。

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