TriangleStrip
VTKExamples/Java/GeometricObjects/TriangleStrip
Java Program to Display Triangle Strip.
The triangle strip is a composite two-dimensional cell consisting of one or more triangles. The points defining the triangle strip need not lie in a plane. The triangle strip is defined by an ordered list of n+2 points, where n is the number of triangles. The ordering of the points is such that each set of three points defines a triangle.
Author: Bharatesh Chakravarthi Affiliation: VE Lab, Chung Ang University, Seoul, South Korea.
Code¶
TriangleStrip.java
import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.SwingUtilities; import vtk.vtkActor; import vtk.vtkNativeLibrary; import vtk.vtkPanel; import vtk.vtkPoints; import vtk.vtkCellArray; import vtk.vtkPolyData; import vtk.vtkTriangleStrip; import vtk.vtkPolyDataMapper; import vtk.vtkNamedColors; public class TriangleStrip extends JPanel implements ActionListener { private static final long serialVersionUID = 1L; private vtkPanel renWin; private JButton exitButton; // ----------------------------------------------------------------- // 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 TriangleStrip() { super(new BorderLayout()); vtkNamedColors Color = new vtkNamedColors(); //For Actor Color double ActorColor[] = 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("Lime",ActorColor); //Change Color Name to Use your own Color for Renderer Background Color.GetColor("Aqua",BgColor); vtkPoints Points = new vtkPoints(); Points.InsertNextPoint(0.0,0.0,0.0); Points.InsertNextPoint(0.0,1.0,0.0); Points.InsertNextPoint(1.0,0.0,0.0); Points.InsertNextPoint(1.5,1.0,0.0); vtkTriangleStrip TriangleStrip = new vtkTriangleStrip(); TriangleStrip.GetPointIds().SetNumberOfIds(4); TriangleStrip.GetPointIds().SetId(0, 0); TriangleStrip.GetPointIds().SetId(1, 1); TriangleStrip.GetPointIds().SetId(2, 2); TriangleStrip.GetPointIds().SetId(3, 3); vtkCellArray CellArray = new vtkCellArray(); CellArray.InsertNextCell(TriangleStrip); vtkPolyData TrianglePolyData = new vtkPolyData(); TrianglePolyData.SetPoints(Points); TrianglePolyData.SetPolys(CellArray); //Create a Mapper and Actor vtkPolyDataMapper Mapper = new vtkPolyDataMapper(); Mapper.SetInputData(TrianglePolyData); vtkActor Actor = new vtkActor(); Actor.SetMapper(Mapper); Actor.GetProperty().EdgeVisibilityOn(); Actor.GetProperty().SetColor(ActorColor); Actor.GetProperty().SetLineWidth(2.5); renWin = new vtkPanel(); renWin.GetRenderer().AddActor(Actor); renWin.resetCamera(); renWin.GetRenderer().SetBackground(BgColor); renWin.resetCamera(); // Add Java UI components exitButton = new JButton("Exit"); exitButton.addActionListener(this); add(renWin, BorderLayout.CENTER); add(exitButton, BorderLayout.SOUTH); } /** An ActionListener that listens to the button. */ public void actionPerformed(ActionEvent e) { if (e.getSource().equals(exitButton)) { System.exit(0); } } public static void main(String s[]) { SwingUtilities.invokeLater(new Runnable() { public void run() { JFrame frame = new JFrame("Triangle Strip"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().setLayout(new BorderLayout()); frame.getContentPane().add(new TriangleStrip(), BorderLayout.CENTER); frame.setSize(400, 400); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } }