TubeFilter

VTKExamples/Java/PolyData/TubeFilter


Description

This example creates a tube around a line. This is helpful because when you zoom the camera, the thickness of a line remains constant, while the thickness of a tube varies.

Other Languages

See (Cxx), (Python)

Question

If you have a simple question about this example contact us at VTKExamplesProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

Code

TubeFilter.java

import vtk.vtkActor;
import vtk.vtkNativeLibrary;
import vtk.vtkLineSource;
import vtk.vtkTubeFilter;
import vtk.vtkPolyDataMapper;
import vtk.vtkRenderWindow;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkRenderer;
import vtk.vtkNamedColors;


public class TubeFilter  
{
  // -----------------------------------------------------------------
  // Load VTK library and print which library was not properly loaded
  static 
  {
    if (!vtkNativeLibrary.LoadAllNativeLibraries()) 
    {
      for (vtkNativeLibrary lib : vtkNativeLibrary.values()) 
      {
        if (!lib.IsLoaded()) 
        {
          System.out.println(lib.GetLibraryName() + " not loaded");
        }
      }
    }
    vtkNativeLibrary.DisableOutputWindow(null);
  }
  // -----------------------------------------------------------------


  public static void main(String s[]) 
  {
    /*
            * This example creates a tube around a line. 
            * This is helpful because when you zoom the camera, 
            * the thickness of a line remains constant, 
            * while the thickness of a tube varies.
            * */

    vtkNamedColors Color = new vtkNamedColors(); 
    //For Actor
    double ActorColor[] = new double[4];
    //Renderer Background Color
    double BgColor[] = new double[4];

    //Change Color Name to Use your own Color for Actor
    Color.GetColor("Red",ActorColor);
    //Change Color Name to Use your own Color for Renderer Background
    Color.GetColor("Gray",BgColor);

    // Create a line
    vtkLineSource LineSource = new vtkLineSource();
    LineSource.SetPoint1(1.0, 0.0, 0.0);
    LineSource.SetPoint2(.0, 1.0, 0.0);

    // Create a mapper and actor
    vtkPolyDataMapper LineMapper = new vtkPolyDataMapper();
    LineMapper.SetInputConnection(LineSource.GetOutputPort());


    vtkActor LineActor = new vtkActor();
    LineActor.SetMapper(LineMapper);
    LineActor.GetProperty().SetColor(ActorColor);
    LineActor.GetProperty().SetLineWidth(3);

    vtkTubeFilter TubeFilter = new vtkTubeFilter();
    TubeFilter.SetInputConnection(LineSource.GetOutputPort());
    TubeFilter.SetRadius(0.025);
    TubeFilter.SetNumberOfSides(50);
    TubeFilter.Update();


    vtkPolyDataMapper TubeMapper = new vtkPolyDataMapper();
    TubeMapper.SetInputConnection(TubeFilter.GetOutputPort());

    vtkActor TubeActor = new vtkActor();
    TubeActor.SetMapper(TubeMapper);
    //Make the tube have some transparency.
    TubeActor.GetProperty().SetOpacity(0.5);


    // Create the renderer, render window and interactor.
    vtkRenderer ren = new vtkRenderer();
    vtkRenderWindow renWin = new vtkRenderWindow();
    renWin.AddRenderer(ren);
    vtkRenderWindowInteractor iren = new vtkRenderWindowInteractor();
    iren.SetRenderWindow(renWin);

    // Visualise the arrow
    ren.AddActor(LineActor);
    ren.AddActor(TubeActor);
    ren.SetBackground(BgColor);
    ren.ResetCamera();

    renWin.SetSize(300,300);
    renWin.Render();

    iren.Initialize();
    iren.Start();
  }
}