vtk读取文件中点坐标

vtk基础编程(2)-读取数据文件中的坐标点

1. 案例说明

在实际计算中,常常需要大量的数据, 这个时候数据文件就必不可少, 例如

数据文件points.dat, 中存放了三个点的坐标,

        0.0 0.0 0.0
        1.0 0.0 0.0
        0.0 1.0 0.0
        1.0 1.0 0.0
读取坐标文件最简单的方法就是使用vtkSimplePointsReader, 比如下面的形式

         vtkSmartPointer<vtkSimplePointsReader> reader = vtkSmartPointer<vtkSimplePointsReader>::New();
         reader->SetFileName ( "points.dat" );
         reader->Update();

vtkSimplePointsReader的继承关系如下图所示:

 

 

 1 int main(int argc, char* argv[])

 2 {

 3   // Verify input arguments

 4   if ( argc != 2 )

 5     {

 6     std::cout << "Usage: " << argv[0]

 7               << " Filename(.xyz)" << std::endl;

 8     return EXIT_FAILURE;

 9     }

10 

11   // Read the file

12   vtkSmartPointer<vtkSimplePointsReader> reader =

13     vtkSmartPointer<vtkSimplePointsReader>::New();

14   reader->SetFileName ( argv[1] );

15   reader->Update();

16 

17   // Visualize

18   vtkSmartPointer<vtkPolyDataMapper> mapper =

19     vtkSmartPointer<vtkPolyDataMapper>::New();

20   mapper->SetInputConnection(reader->GetOutputPort());

21 

22   vtkSmartPointer<vtkActor> actor =

23     vtkSmartPointer<vtkActor>::New();

24   actor->SetMapper(mapper);

25   actor->GetProperty()->SetPointSize(4);

26 

27   vtkSmartPointer<vtkRenderer> renderer =

28     vtkSmartPointer<vtkRenderer>::New();

29   vtkSmartPointer<vtkRenderWindow> renderWindow =

30     vtkSmartPointer<vtkRenderWindow>::New();

31   renderWindow->AddRenderer(renderer);

32   vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =

33     vtkSmartPointer<vtkRenderWindowInteractor>::New();

34   renderWindowInteractor->SetRenderWindow(renderWindow);

35 

36   renderer->AddActor(actor);

37   renderer->SetBackground(.3, .6, .3); // Background color green

38 

39   renderWindow->Render();

40   renderWindowInteractor->Start();

41 

42   return EXIT_SUCCESS;

43 }

 

3.程序运行效果

原文地址: http://blog.csdn.net/chinamming/article/details/16860051

 程序源码下载地址:

 http://download.csdn.net/detail/chinamming/6587083