如何从vtkVoxelContoursToSurfaceFilter获取面和顶点？

Question

我正在遵循VTK网站上的ContoursToSurface（https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/ContoursToSurface/）示例。我的问题只是在vtkVoxelContoursToSurfaceFilter作用于轮廓后如何获取面和顶点？

[可视化之前将滤波器的输出从ijk坐标转换为世界坐标后，不同元素（多边形，垂直，件，点，线和单元的数量）]

std::cout << "GetNumberOfPolys :" << std::to_string( transformFilter->GetOutput(0)->GetNumberOfPolys()) << std::endl;
std::cout << "GetNumberOfPieces :" << std::to_string( transformFilter->GetOutput(0)->GetNumberOfPieces()) << std::endl;
std::cout << "GetNumberOfLines :" << std::to_string( transformFilter->GetOutput(0)->GetNumberOfLines()) << std::endl;
std::cout << "GetNumberOfVerts :" << std::to_string( transformFilter->GetOutput(0)->GetNumberOfVerts()) << std::endl;
std::cout << "GetNumberOfPoints :" << std::to_string( transformFilter->GetOutput(0)->GetNumberOfPoints()) << std::endl;
std::cout << "GetNumberOfCells :" << std::to_string( transformFilter->GetOutput(0)->GetNumberOfCells()) << std::endl;
这将输出以下内容（我没想到吗？）>
GetNumberOfPolys :0
GetNumberOfPieces :1
GetNumberOfLines :0
GetNumberOfVerts :0
GetNumberOfPoints :0
GetNumberOfCells :0
我正在遵循VTK网站上的ContoursToSurface（https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/ContoursToSurface/）示例。我的问题只是简单地获取面和顶点...

Answer 1

pd = transformFilter->GetOutput();

// Extracting vertices:

vertices = pd->GetPoints();

// Extracting faces (cells):

cells = pd->GetCells();