//Code by cynthia chen, 2021.10.29
#include <iostream>
#include <time.h>
#include <string>
// 利用VTK读取ply网格文件
#include <vtkPolyDataMapper.h>
//#include <vtkActor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkPLYReader.h>
#include <vtkPolyData.h>
#include <vtkPolyDataReader.h>
#define vtkRenderingCore_AUTOINIT 2(vtkRenderingOpenGL2, vtkInteractionStyle)
void accessEachVertex(const vtkSmartPointer<vtkPolyData>& ply_data)
{
vtkSmartPointer<vtkPoints> vertices = ply_data->GetPoints(