VTK：读取obj文件，使用vtkMassProperties计算obj三维模型的体积和面积

#include <vtkOBJReader.h>#include <vtkTriangleFilter.h>#include <vtkSmartPointer.h>#include <vtkMassProperties.h>#include <iostream>using namespace std;int main(){vtkSmartPointer<vtkOBJReader> reader =vtkSmartPointer<vtkOBJReader>::New();reader->SetFileName("C:\\Users\\HuangWang\\Desktop\\兔子.obj");reader->Update();vtkSmartPointer< vtkTriangleFilter > triangleFilter= vtkSmartPointer< vtkTriangleFilter >::New();  triangleFilter->SetInput( reader->GetOutput());  triangleFilter->Update(); vtkSmartPointer<vtkMassProperties> polygonProperties = vtkSmartPointer< vtkMassProperties >::New();  polygonProperties->SetInput(triangleFilter->GetOutput());  polygonProperties->Update();  double vol = polygonProperties->GetVolume();  double area= polygonProperties->GetSurfaceArea();cout<<vol<<""<<area<<endl;return 0;}

经过后续的相关测试，发现了这个类对于比较复杂的obj模型和不封闭的obj模型的几何属性计算并不是特别的精确，所以谨慎使用。