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C++ VTK實(shí)例之高斯隨機(jī)數(shù)的生成

更新時(shí)間：2021年11月24日 11:01:29 作者：大眼睛兔兔

這篇文章主要介紹了VTK的一個(gè)實(shí)例之高斯隨機(jī)數(shù)的生成，本文演示了從一個(gè)平均數(shù)是0.0和標(biāo)準(zhǔn)偏差是2.2的高斯分布中隨機(jī)生成3個(gè)隨機(jī)數(shù)。感興趣的同學(xué)可以學(xué)習(xí)一下

VTK實(shí)例高斯隨機(jī)數(shù)的生成

這個(gè)例子演示了從一個(gè)平均數(shù)是0.0和標(biāo)準(zhǔn)偏差是2.2的高斯分布中隨機(jī)生成3個(gè)隨機(jī)數(shù)。先創(chuàng)建兩個(gè)文件：GaussianRandomNumber.cpp和CMakeLists.txt。

代碼如下：

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 ()

編譯

將以上兩個(gè)文件放在自定義文件夾里，再新建一個(gè)build目錄，用于存放編譯后生成的文件。打開(kāi)CMake程序，編譯設(shè)置界面如下：