VTK读取一个TXT文档中的三维点坐标显示三维点云

VTK读取一个TXT文档中的三维点坐标就可以显示三维点云，txt文档中的格式为

X坐标 Y坐标
Z坐标

如下所示：



附上代码如下：

#include <iostream>
#include <vector>
#include "vtkActor.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkProperty.h"
#include "vtkInteractorStyleTrackballCamera.h"
#include "vtkPoints.h"
#include "vtkPolyVertex.h"
#include "vtkUnstructuredGrid.h"
#include "vtkDataSetMapper.h"
#include "vtkPolyData.h"
#include "vtkCellArray.h"
#include "vtkInteractorStyleTrackball.h"
#include "vtkPolyDataMapper.h"
using namespace std;

void main(int argc, char* argv[])
{
vtkPoints *m_Points = vtkPoints::New();
vtkCellArray *vertices = vtkCellArray::New();	//_存放细胞顶点，用于渲染（显示点云所必须的）
vtkPolyData *polyData = vtkPolyData::New();
vtkPolyDataMapper *pointMapper = vtkPolyDataMapper::New();
vtkActor *pointActor = vtkActor::New();
vtkRenderer *ren1= vtkRenderer::New();
vtkRenderWindow *renWin = vtkRenderWindow::New();
vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
vtkInteractorStyleTrackball *istyle = vtkInteractorStyleTrackball::New();

//_读进点云数据信息
FILE*fp = NULL; fp=fopen("point.txt","r");	//2DpointDatas.txt
if(!fp)
{

printf("打开文件失败！！\n");
int m;
cin>>m;
exit(0);
}
double x=0,y=0,z=0;
int i = 0;
while (!feof(fp))
{
fscanf(fp,"%lf %lf %lf",&x,&y,&z);
m_Points->InsertPoint(i,x,y,z);		//_加入点信息
vertices->InsertNextCell(1);		//_加入细胞顶点信息----用于渲染点集
vertices->InsertCellPoint(i);
i ++;
}
fclose(fp);

//_创建待显示数据源

polyData->SetPoints(m_Points);		//_设置点集
polyData->SetVerts(vertices);		//_设置渲染顶点
pointMapper->SetInput( polyData );

pointActor->SetMapper( pointMapper );
pointActor->GetProperty()->SetColor(0.0,0.1,1.0);
pointActor->GetProperty()->SetAmbient(0.5);
pointActor->GetProperty()->SetPointSize(2);
//pointActor->GetProperty()->SetRepresentationToWireframe();
//pointActor->GetProperty()->SetRepresentationToSurface();

ren1->AddActor( pointActor );
ren1->SetBackground( 0, 0, 0);

renWin->AddRenderer( ren1 );
renWin->SetSize(800,800);

iren->SetInteractorStyle(istyle);
iren->SetRenderWindow(renWin);  //交互

renWin->Render();
iren->Start();

//删除各指针
m_Points->Delete();
vertices->Delete();
polyData->Delete();
pointMapper->Delete();
pointActor->Delete();
ren1->Delete();
renWin->Delete();
iren->Delete();
istyle->Delete();
}

智能指针版本

#include <iostream>
#include <vector>
#include <vtkActor.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkProperty.h>
#include <vtkInteractorStyleTrackball.h>
#include <vtkInteractorStyleTrackballCamera.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkCellArray.h>
#include <vtkPolyDataMapper.h>
#include <vtkSmartPointer.h>
using namespace std;

void main(int argc, char* argv[])
{
vtkSmartPointer<vtkPoints> m_Points = vtkSmartPointer<vtkPoints>::New();
vtkSmartPointer<vtkCellArray> vertices =vtkSmartPointer<vtkCellArray>::New(); //_存放细胞顶点，用于渲染（显示点云所必须的）
vtkSmartPointer<vtkPolyData> polyData = vtkSmartPointer<vtkPolyData>::New();
vtkSmartPointer<vtkPolyDataMapper> pointMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
vtkSmartPointer<vtkActor> pointActor = vtkSmartPointer<vtkActor>::New();
vtkSmartPointer<vtkRenderer> ren1=vtkSmartPointer< vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renWin = vtkSmartPointer<vtkRenderWindow>::New();
vtkSmartPointer<vtkRenderWindowInteractor> iren =vtkSmartPointer<vtkRenderWindowInteractor>::New();
vtkSmartPointer<vtkInteractorStyleTrackballCamera> istyle = vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();

//_读进点云数据信息
FILE*fp = NULL; fp=fopen("E:\\斯坦福兔子3000点.txt","r"); //2DpointDatas.txt
if(!fp)
{

printf("打开文件失败！！\n");
int m;
cin>>m;
exit(0);
}
double x=0,y=0,z=0;
int i = 0;
while (!feof(fp))
{
fscanf(fp,"%lf %lf %lf",&x,&y,&z);
m_Points->InsertPoint(i,x,y,z); //_加入点信息
vertices->InsertNextCell(1); //_加入细胞顶点信息----用于渲染点集
vertices->InsertCellPoint(i);
i ++;
}
fclose(fp);

//_创建待显示数据源

polyData->SetPoints(m_Points); //_设置点集
polyData->SetVerts(vertices); //_设置渲染顶点
pointMapper->SetInput( polyData );

pointActor->SetMapper( pointMapper );
pointActor->GetProperty()->SetColor(0.0,0.1,1.0);
pointActor->GetProperty()->SetAmbient(0.5);
pointActor->GetProperty()->SetPointSize(2);
//pointActor->GetProperty()->SetRepresentationToWireframe();
//pointActor->GetProperty()->SetRepresentationToSurface();

ren1->AddActor( pointActor );
ren1->SetBackground( 0, 0, 0);

renWin->AddRenderer( ren1 );
renWin->SetSize(800,800);

iren->SetInteractorStyle(istyle);
iren->SetRenderWindow(renWin); //交互

renWin->Render();
iren->Start();
}

附上结果图片