java left logo
java middle logo
java right logo
 

Home arrow Other API Tips arrow Java3D arrow Picking utilities on various GeometryArray subclasses and Morph object
 
 
Main Menu
Home
Java Tutorials
Book Reviews
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Sitemap
Java Network
Java Forums
Java Tips Blog




Most Visited Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews
Top Rated Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews


Statistics
Registered Users: 769
Java SE Tips: 614
Java ME Tips: 201
Java EE Tips: 184
Other API Tips: 779
Java Applications: 298
Java Libraries: 209
Java Games: 16
Book Reviews:
 
 
 
Picking utilities on various GeometryArray subclasses and Morph object E-mail
User Rating: / 2
PoorBest 

This Java tip shows how to use the Picking utilities on various GeometryArray subclasses and Morph object.


Image

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;

import javax.media.j3d.Alpha;
import javax.media.j3d.Appearance;
import javax.media.j3d.Behavior;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.CompressedGeometry;
import javax.media.j3d.CompressedGeometryHeader;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Geometry;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.Group;
import javax.media.j3d.IndexedLineArray;
import javax.media.j3d.IndexedLineStripArray;
import javax.media.j3d.IndexedPointArray;
import javax.media.j3d.IndexedQuadArray;
import javax.media.j3d.IndexedTriangleArray;
import javax.media.j3d.IndexedTriangleFanArray;
import javax.media.j3d.IndexedTriangleStripArray;
import javax.media.j3d.LineArray;
import javax.media.j3d.LineStripArray;
import javax.media.j3d.Material;
import javax.media.j3d.Morph;
import javax.media.j3d.PointArray;
import javax.media.j3d.PointAttributes;
import javax.media.j3d.QuadArray;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.TriangleArray;
import javax.media.j3d.TriangleFanArray;
import javax.media.j3d.TriangleStripArray;
import javax.media.j3d.View;
import javax.media.j3d.WakeupOnElapsedFrames;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.border.BevelBorder;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.picking.PickCanvas;
import com.sun.j3d.utils.picking.PickTool;
import com.sun.j3d.utils.picking.behaviors.PickRotateBehavior;
import com.sun.j3d.utils.picking.behaviors.PickTranslateBehavior;
import com.sun.j3d.utils.picking.behaviors.PickZoomBehavior;
import com.sun.j3d.utils.universe.SimpleUniverse;

/**
 * PickTest shows how to use the Picking utilities on various GeometryArray
 * subclasses and Morph object. Type of Geometry : CompressedGeometry (
 * GullCG.java ) IndexedQuadArray ( CubeIQA.java ) TriangleArray (
 * TetrahedronTA.java ) IndexedTriangleArray ( TetrahedronITA.java )
 * TriangleFanArray ( OctahedronTFA.java ) IndexedTriangleFanArray (
 * OctahedronITA.java ) TriangleStripArray ( IcosahedronTFA.java )
 * IndexedTriangleStripArray ( IcosahedronITA.java ) PointArray(
 * TetrahedronPA.java ) LineArray( TetrahedronLA.java ) IndexLineArray(
 * TetrahedronILA.java ) LineStripArray( TetrahedronLSA.java )
 * IndexLineStripArray( TetrahedronILSA.java )
 
 * Morph Object uses : QuadArray ( ColorCube.java, ColorPyramidDown.java, and
 * ColorPyramidUp.java ).
 */

public class PickTest extends Applet implements ActionListener {

  private View view = null;

  private QuadArray geomMorph[] new QuadArray[3];

  private Morph morph;

  private PickRotateBehavior behavior1;

  private PickZoomBehavior behavior2;

  private PickTranslateBehavior behavior3;

  private SimpleUniverse u = null;

  public BranchGroup createSceneGraph(Canvas3D canvas) {
    // Create the root of the branch graph
    BranchGroup objRoot = new BranchGroup();

    // Create a Transformgroup to scale all objects so they
    // appear in the scene.
    TransformGroup objScale = new TransformGroup();
    Transform3D t3d = new Transform3D();
    t3d.setScale(1.0);
    objScale.setTransform(t3d);
    objRoot.addChild(objScale);

    // Create a bunch of objects with a behavior and add them
    // into the scene graph.

    int row, col;
    int numRows = 4, numCols = 4;

    for (int i = 0; i < numRows; i++) {
      double ypos = (double) (i - numRows / 20.45 0.25;
      for (int j = 0; j < numCols; j++) {
        double xpos = (double) (j - numCols / 20.45 0.25;
        objScale
            .addChild(createObject(i * numCols + j, 0.1, xpos, ypos));
      }
    }

    BoundingSphere bounds = new BoundingSphere(new Point3d(0.00.00.0),
        100.0);

    // Add a light.
    Color3f lColor = new Color3f(1.0f1.0f1.0f);
    Vector3f lDir = new Vector3f(0.0f0.0f, -1.0f);

    DirectionalLight lgt = new DirectionalLight(lColor, lDir);
    lgt.setInfluencingBounds(bounds);
    objRoot.addChild(lgt);

    // Now create the Alpha object that controls the speed of the
    // morphing operation.
    Alpha morphAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE
        | Alpha.DECREASING_ENABLE, 004000100050040001000,
        500);

    // Finally, create the morphing behavior
    MorphingBehavior mBeh = new MorphingBehavior(morphAlpha, morph);
    mBeh.setSchedulingBounds(bounds);
    objRoot.addChild(mBeh);

    behavior1 = new PickRotateBehavior(objRoot, canvas, bounds);
    objRoot.addChild(behavior1);

    behavior2 = new PickZoomBehavior(objRoot, canvas, bounds);
    objRoot.addChild(behavior2);

    behavior3 = new PickTranslateBehavior(objRoot, canvas, bounds);
    objRoot.addChild(behavior3);

    // Let Java 3D perform optimizations on this scene graph.
    objRoot.compile();

    return objRoot;
  }

  private Group createObject(int index, double scale, double xpos, double ypos) {

    Shape3D shape = null;
    Geometry geom = null;

    // Create a transform group node to scale and position the object.
    Transform3D t = new Transform3D();
    t.set(scale, new Vector3d(xpos, ypos, 0.0));
    TransformGroup objTrans = new TransformGroup(t);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    objTrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);

    // Create a second transform group node and initialize it to the
    // identity. Enable the TRANSFORM_WRITE capability so that
    // our behavior code can modify it at runtime.
    TransformGroup spinTg = new TransformGroup();
    spinTg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    spinTg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
    spinTg.setCapability(TransformGroup.ENABLE_PICK_REPORTING);

    Appearance appearance = new Appearance();

    switch (index) {
    case 0:
      geom = new GullCG();
      break;
    case 1:
      geom = new TetrahedronTA();
      break;
    case 2:
      geom = new OctahedronTFA();
      break;
    case 3:
      geom = new IcosahedronTSA();
      break;
    case 4:
      geom = new CubeIQA();
      break;
    case 5:
      geom = new TetrahedronITA();
      break;
    case 6:
      geom = new OctahedronITFA();
      break;
    case 7:
      geom = new IcosahedronITSA();
      break;
    case 8:
      geomMorph[0new ColorPyramidUp();
      geomMorph[1new ColorCube();
      geomMorph[2new ColorPyramidDown();
      break;
    case 9:
      geom = new TetrahedronLA();
      break;
    case 10:
      geom = new TetrahedronILA();
      break;
    case 11:
      geom = new TetrahedronLSA();
      break;
    case 12:
      geom = new TetrahedronILSA();
      break;
    case 13:
      geom = new TetrahedronPA();
      break;
    case 14:
      geom = new TetrahedronIPA();
      break;
    // TODO: other geo types, Text3D?
    case 15:
      geom = new TetrahedronTA();
      break;
    }

    Material m = new Material();

    if (index == 8) {
      m.setLightingEnable(false);
      appearance.setMaterial(m);
      morph = new Morph((GeometryArray[]) geomMorph, appearance);
      morph.setCapability(Morph.ALLOW_WEIGHTS_READ);
      morph.setCapability(Morph.ALLOW_WEIGHTS_WRITE);
      PickTool.setCapabilities(morph, PickTool.INTERSECT_FULL);
      spinTg.addChild(morph);
    else {
      // Geometry picking require this to be set.
      if (index == 0)
        m.setLightingEnable(true);
      else
        m.setLightingEnable(false);
      appearance.setMaterial(m);

      if ((index == 13|| (index == 14)) {
        PointAttributes pa = new PointAttributes();
        pa.setPointSize(4.0f);
        appearance.setPointAttributes(pa);
      }

      shape = new Shape3D(geom, appearance);
      shape.setCapability(Shape3D.ALLOW_APPEARANCE_READ);
      shape.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE);
      shape.setCapability(Shape3D.ENABLE_PICK_REPORTING);
      PickTool.setCapabilities(shape, PickTool.INTERSECT_FULL);
      spinTg.addChild(shape);
    }

    // add it to the scene graph.
    objTrans.addChild(spinTg);

    return objTrans;
  }

  private void setPickMode(int mode) {
    behavior1.setMode(mode);
    behavior2.setMode(mode);
    behavior3.setMode(mode);
  }

  private void setPickTolerance(float tolerance) {
    behavior1.setTolerance(tolerance);
    behavior2.setTolerance(tolerance);
    behavior3.setTolerance(tolerance);
  }

  private void setViewMode(int mode) {
    view.setProjectionPolicy(mode);
  }

  // GUI stuff

  String pickModeString = new String("Pick Mode");

  String boundsString = new String("BOUNDS");

  String geometryString = new String("GEOMETRY");

  String geometryIntersectString = new String("GEOMETRY_INTERSECT_INFO");

  String toleranceString = new String("Pick Tolerance");

  String tolerance0String = new String("0");

  String tolerance2String = new String("2");

  String tolerance4String = new String("4");

  String tolerance8String = new String("8");

  String viewModeString = new String("View Mode");

  String perspectiveString = new String("Perspective");

  String parallelString = new String("Parallel");

  private void addRadioButton(JPanel panel, ButtonGroup bg, String ownerName,
      String buttonName, boolean selected) {
    JRadioButton item;
    item = new JRadioButton(buttonName);
    item.setName(ownerName);
    item.addActionListener(this);
    if (selected) {
      item.setSelected(true);
    }
    panel.add(item);
    bg.add(item);
  }

  private void setupGUI(JPanel panel) {
    ButtonGroup bg;

    panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
    panel.setBorder(new BevelBorder(BevelBorder.RAISED));

    panel.add(new JLabel(pickModeString));
    bg = new ButtonGroup();
    addRadioButton(panel, bg, pickModeString, boundsString, true);
    addRadioButton(panel, bg, pickModeString, geometryString, false);
    addRadioButton(panel, bg, pickModeString, geometryIntersectString,
        false);

    panel.add(new JLabel(toleranceString));
    bg = new ButtonGroup();
    addRadioButton(panel, bg, toleranceString, tolerance0String, false);
    addRadioButton(panel, bg, toleranceString, tolerance2String, true);
    addRadioButton(panel, bg, toleranceString, tolerance4String, false);
    addRadioButton(panel, bg, toleranceString, tolerance8String, false);

    panel.add(new JLabel(viewModeString));
    bg = new ButtonGroup();
    addRadioButton(panel, bg, viewModeString, perspectiveString, true);
    addRadioButton(panel, bg, viewModeString, parallelString, false);

  }

  public void actionPerformed(ActionEvent e) {
    String name = ((Componente.getSource()).getName();
    String value = e.getActionCommand();
    //System.out.println("action: name = " + name + " value = " + value);
    if (name == pickModeString) {
      if (value == boundsString) {
        setPickMode(PickCanvas.BOUNDS);
      else if (value == geometryString) {
        setPickMode(PickCanvas.GEOMETRY);
      else if (value == geometryIntersectString) {
        setPickMode(PickCanvas.GEOMETRY_INTERSECT_INFO);
      else {
        System.out.println("Unknown pick mode: " + value);
      }
    else if (name == toleranceString) {
      if (value == tolerance0String) {
        setPickTolerance(0.0f);
      else if (value == tolerance2String) {
        setPickTolerance(2.0f);
      else if (value == tolerance4String) {
        setPickTolerance(4.0f);
      else if (value == tolerance8String) {
        setPickTolerance(8.0f);
      else {
        System.out.println("Unknown tolerance: " + value);
      }
    else if (name == viewModeString) {
      if (value == perspectiveString) {
        setViewMode(View.PERSPECTIVE_PROJECTION);
      else if (value == parallelString) {
        setViewMode(View.PARALLEL_PROJECTION);
      }
    else {
      System.out.println("Unknown action name: " + name);
    }
  }

  public PickTest() {
  }

  public void init() {
    setLayout(new BorderLayout());
    Canvas3D c = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
    add("Center", c);

    JPanel guiPanel = new JPanel();
    setupGUI(guiPanel);
    add(guiPanel, BorderLayout.EAST);

    // Create a scene and attach it to the virtual universe
    BranchGroup scene = createSceneGraph(c);
    u = new SimpleUniverse(c);

    // This will move the ViewPlatform back a bit so the
    // objects in the scene can be viewed.
    u.getViewingPlatform().setNominalViewingTransform();
    view = u.getViewer().getView();

    u.addBranchGraph(scene);
  }

  public void destroy() {
    u.cleanup();
  }

  public static void main(String argv[]) {

    BranchGroup group;

    new MainFrame(new PickTest()750550);
  }
}

class TetrahedronILSA extends IndexedLineStripArray {

  private static final int[] lineLengths = 4};

  TetrahedronILSA() {
    super(4, GeometryArray.COORDINATES | GeometryArray.COLOR_3, 8,
        lineLengths);

    Point3f verts[] new Point3f[4];
    Color3f colors[] new Color3f[4];

    verts[0new Point3f(1.0f1.0f1.0f);
    verts[1new Point3f(1.0f, -1.0f, -1.0f);
    verts[2new Point3f(-1.0f, -1.0f1.0f);
    verts[3new Point3f(-1.0f1.0f, -1.0f);

    colors[0new Color3f(1.0f0.0f0.0f);
    colors[1new Color3f(0.0f1.0f0.0f);
    colors[2new Color3f(0.0f0.0f1.0f);
    colors[3new Color3f(1.0f1.0f0.0f);

    int pntsIndex[] new int[8];
    int clrsIndex[] new int[8];

    pntsIndex[00;
    clrsIndex[00;
    pntsIndex[11;
    clrsIndex[11;
    pntsIndex[23;
    clrsIndex[23;
    pntsIndex[32;
    clrsIndex[32;

    pntsIndex[41;
    clrsIndex[41;
    pntsIndex[52;
    clrsIndex[52;
    pntsIndex[60;
    clrsIndex[60;
    pntsIndex[73;
    clrsIndex[73;

    setCoordinates(0, verts);
    setCoordinateIndices(0, pntsIndex);
    setColors(0, colors);
    setColorIndices(0, clrsIndex);
  }
}

class TetrahedronILA extends IndexedLineArray {

  TetrahedronILA() {
    super(4, GeometryArray.COORDINATES | GeometryArray.COLOR_3, 12);

    Point3f verts[] new Point3f[4];
    Color3f colors[] new Color3f[4];

    verts[0new Point3f(1.0f1.0f1.0f);
    verts[1new Point3f(1.0f, -1.0f, -1.0f);
    verts[2new Point3f(-1.0f, -1.0f1.0f);
    verts[3new Point3f(-1.0f1.0f, -1.0f);

    colors[0new Color3f(1.0f0.0f0.0f);
    colors[1new Color3f(0.0f1.0f0.0f);
    colors[2new Color3f(0.0f0.0f1.0f);
    colors[3new Color3f(1.0f1.0f0.0f);

    int[] pntsIndex = new int[12];
    int[] clrsIndex = new int[12];

    pntsIndex[00;
    clrsIndex[00;
    pntsIndex[11;
    clrsIndex[11;

    pntsIndex[21;
    clrsIndex[21;
    pntsIndex[32;
    clrsIndex[32;

    pntsIndex[42;
    clrsIndex[42;
    pntsIndex[50;
    clrsIndex[50;

    pntsIndex[61;
    clrsIndex[61;
    pntsIndex[73;
    clrsIndex[73;

    pntsIndex[82;
    clrsIndex[82;
    pntsIndex[93;
    clrsIndex[93;

    pntsIndex[100;
    clrsIndex[100;
    pntsIndex[113;
    clrsIndex[113;

    setCoordinates(0, verts);
    setCoordinateIndices(0, pntsIndex);
    setColors(0, colors);
    setColorIndices(0, clrsIndex);
  }
}

class TetrahedronTA extends TriangleArray {

  TetrahedronTA() {
    super(12, GeometryArray.COORDINATES | GeometryArray.COLOR_3);

    Point3f verts[] new Point3f[4];
    Color3f colors[] new Color3f[4];

    verts[0new Point3f(1.0f1.0f1.0f);
    verts[1new Point3f(1.0f, -1.0f, -1.0f);
    verts[2new Point3f(-1.0f, -1.0f1.0f);
    verts[3new Point3f(-1.0f1.0f, -1.0f);

    colors[0new Color3f(1.0f0.0f0.0f);
    colors[1new Color3f(0.0f1.0f0.0f