vtk基础编程(2)-读取数据文件中的坐标点

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

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:

        

2. 完整的程序实现

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

{

  // Verify input arguments

  if ( argc != 2 )

    {

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

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

    return EXIT_FAILURE;

    }



  // Read the file

  vtkSmartPointer<vtkSimplePointsReader> reader =

    vtkSmartPointer<vtkSimplePointsReader>::New();

  reader->SetFileName ( argv[1] );

  reader->Update();



  // Visualize

  vtkSmartPointer<vtkPolyDataMapper> mapper =

    vtkSmartPointer<vtkPolyDataMapper>::New();

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



  vtkSmartPointer<vtkActor> actor =

    vtkSmartPointer<vtkActor>::New();

  actor->SetMapper(mapper);

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



  vtkSmartPointer<vtkRenderer> renderer =

    vtkSmartPointer<vtkRenderer>::New();

  vtkSmartPointer<vtkRenderWindow> renderWindow =

    vtkSmartPointer<vtkRenderWindow>::New();

  renderWindow->AddRenderer(renderer);

  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =

    vtkSmartPointer<vtkRenderWindowInteractor>::New();

  renderWindowInteractor->SetRenderWindow(renderWindow);



  renderer->AddActor(actor);

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



  renderWindow->Render();

  renderWindowInteractor->Start();



  return EXIT_SUCCESS;

}

 

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