vtk基础编程(2)-读取数据文件中的坐标点

原文地址:
/article/7829806.html

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: /article/7829806.html

程序源码下载地址:

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