vtk读取文件中点坐标[转]

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:

 int main(int argc, char* argv[])
 {
   // Verify input arguments
   if ( argc !=  )
     {
     std::cout << "Usage: " << argv[]
               << " Filename(.xyz)" << std::endl;
     return EXIT_FAILURE;
     }
 
   // Read the file
   vtkSmartPointer<vtkSimplePointsReader> reader =
     vtkSmartPointer<vtkSimplePointsReader>::New();
   reader->SetFileName ( argv[] );
   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();
 
   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(., ., .); // 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