RibbonFilter

VTKExamples/Java/PolyData/RibbonFilter


Description

Java Program which demonstrates how to draw a flat surface (a ribbon) along a line.

Other Languages

See (Cxx)

Code

RibbonFilter.java

import vtk.vtkActor;
import vtk.vtkNativeLibrary;
import vtk.vtkPoints;
import vtk.vtkPolyData;
import vtk.vtkPolyDataMapper;
import vtk.vtkRenderWindow;
import vtk.vtkRenderWindowInteractor;
import vtk.vtkRenderer;
import vtk.vtkMath;
import vtk.vtkCellArray;
import vtk.vtkRibbonFilter;
import vtk.vtkNamedColors;

public class RibbonFilter 
{

  // -----------------------------------------------------------------
  // 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[]) 
  {

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


    //Change Color Name to Use your own Color for Change Actor Color
    Color.GetColor("Sienna",LineActorColor);
    //Change Color Name to Use your own Color for Renderer Background
    Color.GetColor("SteelBlue",BgColor);

    // No. of vertices
    int nV = 256;      
    double vX, vY, vZ;
    // Spiral radius
    double rS = 2;  
    // No. of spiral cycles
    int nCyc = 3;    
    // Height
    double h = 10;              

    int i;

    // Create points and cells for a spiral
    vtkPoints Points = new vtkPoints();
    vtkMath findPI = new vtkMath(); 
    for(i = 0; i < nV; i++)
    {
      // Spiral coordinates
      vX = rS * Math.cos(2 * findPI.Pi()* nCyc * i / (nV - 1));
      vY = rS * Math.sin(2 * findPI.Pi() * nCyc * i / (nV - 1));
      vZ = h * i / nV;
      Points.InsertPoint(i, vX, vY, vZ);
    }

    vtkCellArray Lines = new vtkCellArray();
    Lines.InsertNextCell(nV);
    for (i = 0; i < nV; i++)
    {
      Lines.InsertCellPoint(i);
    }


    vtkPolyData PolyData = new vtkPolyData();
    PolyData.SetPoints(Points);
    PolyData.SetLines(Lines);

    // Create a mapper and actor
    vtkPolyDataMapper LineMapper = new vtkPolyDataMapper();
    LineMapper.SetInputData(PolyData);


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

    // Create a ribbon around the line
    vtkRibbonFilter RibbonFilter = new vtkRibbonFilter();
    RibbonFilter.SetInputData(PolyData);
    RibbonFilter.SetWidth(0.4);

    // Create a mapper and actor for Ribbon
    vtkPolyDataMapper RibbonMapper = new vtkPolyDataMapper();
    RibbonMapper.SetInputConnection(RibbonFilter.GetOutputPort());


    vtkActor RibbonActor = new vtkActor();
    RibbonActor.SetMapper(RibbonMapper);

    // 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(RibbonActor);
    ren.SetBackground(BgColor);
    ren.GetActiveCamera().Azimuth(40);
    ren.GetActiveCamera().Elevation(30);
    ren.ResetCamera();
    ren.ResetCameraClippingRange();

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

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

  }
}