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：[cpp] view plain copy#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[cpp] view plain copy#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








转：https://blog.csdn.net/hw140701/article/details/56024298