Geometry By Reference NIO : 3D NIO « 3D « Java





Geometry By Reference NIO

Geometry By Reference NIO
/*
 * @(#)GeometryByReferenceNIOBuffer.java 1.7 02/10/21 13:42:07
 * 
 * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
 * 
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 * modification, are permitted provided that the following conditions are met:
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 * this list of conditions and the following disclaimer.
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 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * 
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 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
 * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
 * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
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 * OF SUCH DAMAGES.
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 * the design, construction, operation or maintenance of any nuclear facility.
 */

import java.awt.Container;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.ColoringAttributes;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Geometry;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.GeometryUpdater;
import javax.media.j3d.IndexedGeometryArray;
import javax.media.j3d.IndexedTriangleArray;
import javax.media.j3d.IndexedTriangleStripArray;
import javax.media.j3d.J3DBuffer;
import javax.media.j3d.Material;
import javax.media.j3d.RenderingAttributes;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.TransparencyAttributes;
import javax.media.j3d.TriangleArray;
import javax.media.j3d.TriangleStripArray;
import javax.swing.BoxLayout;
import javax.swing.JApplet;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;

import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.vp.OrbitBehavior;
import com.sun.j3d.utils.universe.SimpleUniverse;
import com.sun.j3d.utils.universe.ViewingPlatform;

public class GeometryByReferenceNIOBuffer extends JApplet implements
    ActionListener, GeometryUpdater {

  RenderingAttributes ra;

  ColoringAttributes ca;

  Material mat;

  Appearance app;

  JComboBox geomType;

  JComboBox vertexType;

  JComboBox colorType;

  JCheckBox transparency;

  JComboBox updates;

  Shape3D shape;

  TransparencyAttributes transp;

  int updateIndex = 0;

  int colorCount = 0, vertexCount = 0;

  int vertexIndex = 0, colorIndex = 0;

  GeometryArray tetraRegular, tetraStrip, tetraIndexed, tetraIndexedStrip;

  GeometryArray[] geoArrays = new GeometryArray[4];

  private static final float sqrt3 = (float) Math.sqrt(3.0);

  private static final float sqrt3_3 = sqrt3 / 3.0f;

  private static final float sqrt24_3 = (float) Math.sqrt(24.0) / 3.0f;

  private static final float ycenter = 0.5f * sqrt24_3;

  private static final float zcenter = -sqrt3_3;

  private static final Point3f p1 = new Point3f(-1.0f, -ycenter, -zcenter);

  private static final Point3f p2 = new Point3f(1.0f, -ycenter, -zcenter);

  private static final Point3f p3 = new Point3f(0.0f, -ycenter, -sqrt3
      - zcenter);

  private static final Point3f p4 = new Point3f(0.0f, sqrt24_3 - ycenter,
      0.0f);

  private static final float[] floatVerts = { p1.x, p1.y, p1.z, // front face
      p2.x, p2.y, p2.z, p4.x, p4.y, p4.z,

      p1.x, p1.y, p1.z,// left, back face
      p4.x, p4.y, p4.z, p3.x, p3.y, p3.z,

      p2.x, p2.y, p2.z,// right, back face
      p3.x, p3.y, p3.z, p4.x, p4.y, p4.z,

      p1.x, p1.y, p1.z,// bottom face
      p3.x, p3.y, p3.z, p2.x, p2.y, p2.z, };

  private static final Color3f c1 = new Color3f(0.6f, 0.0f, 0.0f);

  private static final Color3f c2 = new Color3f(0.0f, 0.6f, 0.0f);

  private static final Color3f c3 = new Color3f(0.0f, 0.6f, 0.6f);

  private static final Color3f c4 = new Color3f(0.6f, 0.6f, 0.0f);

  private static final float[] floatClrs = { c1.x, c1.y, c1.z, // front face
      c2.x, c2.y, c2.z, c4.x, c4.y, c4.z,

      c1.x, c1.y, c1.z,// left, back face
      c4.x, c4.y, c4.z, c3.x, c3.y, c3.z,

      c2.x, c2.y, c2.z,// right, back face
      c3.x, c3.y, c3.z, c4.x, c4.y, c4.z,

      c1.x, c1.y, c1.z,// bottom face
      c3.x, c3.y, c3.z, c2.x, c2.y, c2.z, };

  private static final float[] indexedFloatVerts = { p1.x, p1.y, p1.z, p2.x,
      p2.y, p2.z, p3.x, p3.y, p3.z, p4.x, p4.y, p4.z,

  };

  private static final float[] indexedFloatClrs = { c1.x, c1.y, c1.z, c2.x,
      c2.y, c2.z, c3.x, c3.y, c3.z, c4.x, c4.y, c4.z, };

  private static final int[] indices = { 0, 1, 3, 0, 3, 2, 1, 2, 3, 0, 2, 1 };

  private int[] stripVertexCounts = { 3, 3, 3, 3 };

  private SimpleUniverse u;

  private J3DBuffer floatBufferCoord;

  private J3DBuffer floatBufferColor;

  private J3DBuffer indexedFloatBufferCoord;

  private J3DBuffer indexedFloatBufferColor;

  void createJ3DBuffers() {
    int i;
    ByteOrder order = ByteOrder.nativeOrder();

    FloatBuffer coord = ByteBuffer.allocateDirect(36 * 4).order(order)
        .asFloatBuffer();
    coord.put(floatVerts, 0, 36);
    floatBufferCoord = new J3DBuffer(coord);

    FloatBuffer color = ByteBuffer.allocateDirect(36 * 4).order(order)
        .asFloatBuffer();
    color.put(floatClrs, 0, 36);
    floatBufferColor = new J3DBuffer(color);

    FloatBuffer indexedCoord = ByteBuffer.allocateDirect(12 * 4).order(
        order).asFloatBuffer();
    indexedCoord.put(indexedFloatVerts, 0, 12);
    indexedFloatBufferCoord = new J3DBuffer(indexedCoord);

    FloatBuffer indexedColor = ByteBuffer.allocateDirect(12 * 4).order(
        order).asFloatBuffer();
    indexedColor.put(indexedFloatClrs, 0, 12);
    indexedFloatBufferColor = new J3DBuffer(indexedColor);
  }

  BranchGroup createSceneGraph() {
    BranchGroup objRoot = new BranchGroup();

    // Set up attributes to render lines
    app = new Appearance();

    transp = new TransparencyAttributes();
    transp.setTransparency(0.5f);
    transp.setCapability(TransparencyAttributes.ALLOW_MODE_WRITE);
    transp.setTransparencyMode(TransparencyAttributes.NONE);
    app.setTransparencyAttributes(transp);

    //create the direct nio buffer
    createJ3DBuffers();

    tetraRegular = createGeometry(1);
    tetraStrip = createGeometry(2);
    tetraIndexed = createGeometry(3);
    tetraIndexedStrip = createGeometry(4);

    geoArrays[0] = tetraRegular;
    geoArrays[1] = tetraStrip;
    geoArrays[2] = tetraIndexed;
    geoArrays[3] = tetraIndexedStrip;

    shape = new Shape3D(tetraRegular, app);
    shape.setCapability(Shape3D.ALLOW_GEOMETRY_WRITE);
    shape.setCapability(Shape3D.ALLOW_GEOMETRY_READ);

    Transform3D t = new Transform3D();
    // move the object upwards
    t.set(new Vector3f(0.0f, 0.3f, 0.0f));

    // rotate the shape
    Transform3D temp = new Transform3D();
    temp.rotX(Math.PI / 4.0d);
    t.mul(temp);
    temp.rotY(Math.PI / 4.0d);
    t.mul(temp);

    // Shrink the object
    t.setScale(0.6);

    TransformGroup trans = new TransformGroup(t);
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
    trans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);

    objRoot.addChild(trans);
    trans.addChild(shape);

    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);

    // Set up the global lights
    Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
    Vector3f lDir1 = new Vector3f(-1.0f, -1.0f, -1.0f);
    Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);

    AmbientLight aLgt = new AmbientLight(alColor);
    aLgt.setInfluencingBounds(bounds);
    DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
    lgt1.setInfluencingBounds(bounds);
    objRoot.addChild(aLgt);
    objRoot.addChild(lgt1);

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

    return objRoot;
  }

  JPanel createGeometryByReferencePanel() {
    JPanel panel = new JPanel();
    panel.setBorder(new TitledBorder("Geometry Type"));

    String values[] = { "Array", "Strip", "Indexed", "IndexedStrip" };
    geomType = new JComboBox(values);
    geomType.setLightWeightPopupEnabled(false);
    geomType.addActionListener(this);
    geomType.setSelectedIndex(0);
    panel.add(new JLabel("Geometry Type"));
    panel.add(geomType);

    return panel;
  }

  JPanel createUpdatePanel() {

    JPanel panel = new JPanel();
    panel.setBorder(new TitledBorder("Other Attributes"));

    String updateComp[] = { "None", "Geometry", "Color" };

    transparency = new JCheckBox("EnableTransparency", false);
    transparency.addActionListener(this);
    panel.add(transparency);

    updates = new JComboBox(updateComp);
    updates.setLightWeightPopupEnabled(false);
    updates.addActionListener(this);
    updates.setSelectedIndex(0);
    panel.add(new JLabel("UpdateData"));
    panel.add(updates);

    return panel;
  }

  public GeometryByReferenceNIOBuffer() {
  }

  public void init() {
    Container contentPane = getContentPane();

    Canvas3D c = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
    contentPane.add("Center", c);

    BranchGroup scene = createSceneGraph();
    // SimpleUniverse is a Convenience Utility class
    u = new SimpleUniverse(c);

    // add mouse behaviors to the viewingPlatform
    ViewingPlatform viewingPlatform = u.getViewingPlatform();

    // This will move the ViewPlatform back a bit so the
    // objects in the scene can be viewed.
    viewingPlatform.setNominalViewingTransform();
    u.addBranchGraph(scene);

    // add Orbit behavior to the ViewingPlatform
    OrbitBehavior orbit = new OrbitBehavior(c, OrbitBehavior.REVERSE_ALL);
    BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
        100.0);
    orbit.setSchedulingBounds(bounds);
    viewingPlatform.setViewPlatformBehavior(orbit);

    // Create GUI
    JPanel p = new JPanel();
    BoxLayout boxlayout = new BoxLayout(p, BoxLayout.Y_AXIS);
    p.add(createGeometryByReferencePanel());
    p.add(createUpdatePanel());
    p.setLayout(boxlayout);

    contentPane.add("South", p);
  }

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

  public void actionPerformed(ActionEvent e) {
    Object target = e.getSource();
    GeometryArray geo;
    boolean setColor = false, setVertex = false;
    if (target == geomType) {
      geo = geoArrays[geomType.getSelectedIndex()];
      // Set everything to null, and set it later ..
      geo.setColorRefBuffer(null);
      geo.setCoordRefBuffer(null);
      shape.setGeometry(geoArrays[geomType.getSelectedIndex()]);

      setColor = true;
      setVertex = true;

    } else if (target == transparency) {
      if (transparency.isSelected()) {
        transp.setTransparencyMode(TransparencyAttributes.BLENDED);
      } else {
        transp.setTransparencyMode(TransparencyAttributes.NONE);
      }

    } else if (target == updates) {
      updateIndex = updates.getSelectedIndex();
      if (updateIndex == 1) {
        System.out.println("Doing coordinate update");
        ((GeometryArray) (shape.getGeometry())).updateData(this);
      } else if (updateIndex == 2) {
        System.out.println("Doing color update");
        ((GeometryArray) (shape.getGeometry())).updateData(this);
      }

    }

    if (setVertex) {
      geo = (GeometryArray) shape.getGeometry();
      if (geo instanceof IndexedGeometryArray)
        geo.setCoordRefBuffer(indexedFloatBufferCoord);
      else
        geo.setCoordRefBuffer(floatBufferCoord);

    }
    if (setColor) {
      geo = (GeometryArray) shape.getGeometry();
      if (geo instanceof IndexedGeometryArray)
        geo.setColorRefBuffer(indexedFloatBufferColor);
      else
        geo.setColorRefBuffer(floatBufferColor);
    }
  }

  public static void main(String[] args) {
    Frame frame = new MainFrame(new GeometryByReferenceNIOBuffer(), 800,
        800);
  }

  public GeometryArray createGeometry(int type) {
    GeometryArray tetra = null;
    if (type == 1) {
      tetra = new TriangleArray(12, TriangleArray.COORDINATES
          | TriangleArray.COLOR_3 | TriangleArray.BY_REFERENCE
          | TriangleArray.USE_NIO_BUFFER);

      tetra.setCoordRefBuffer(floatBufferCoord);
      tetra.setColorRefBuffer(floatBufferColor);

    } else if (type == 2) {
      tetra = new TriangleStripArray(12, TriangleStripArray.COORDINATES
          | TriangleStripArray.COLOR_3
          | TriangleStripArray.BY_REFERENCE
          | TriangleStripArray.USE_NIO_BUFFER, stripVertexCounts);
      tetra.setCoordRefBuffer(floatBufferCoord);
      tetra.setColorRefBuffer(floatBufferColor);

    } else if (type == 3) { // Indexed Geometry
      tetra = new IndexedTriangleArray(4,
          IndexedTriangleArray.COORDINATES
              | IndexedTriangleArray.COLOR_3
              | IndexedTriangleArray.BY_REFERENCE
              | IndexedTriangleArray.USE_NIO_BUFFER,
          //IndexedTriangleStripArray.USE_COORD_INDEX_ONLY,
          12);
      tetra.setCoordRefBuffer(indexedFloatBufferCoord);
      tetra.setColorRefBuffer(indexedFloatBufferColor);
      ((IndexedTriangleArray) tetra).setCoordinateIndices(0, indices);
      ((IndexedTriangleArray) tetra).setColorIndices(0, indices);
    } else if (type == 4) { // Indexed strip geometry
      tetra = new IndexedTriangleStripArray(4,
          IndexedTriangleStripArray.COORDINATES
              | IndexedTriangleStripArray.COLOR_3
              | IndexedTriangleStripArray.BY_REFERENCE
              | IndexedTriangleStripArray.USE_NIO_BUFFER
              | IndexedTriangleStripArray.USE_COORD_INDEX_ONLY,
          12, stripVertexCounts);
      tetra.setCoordRefBuffer(indexedFloatBufferCoord);
      tetra.setColorRefBuffer(indexedFloatBufferColor);
      ((IndexedTriangleStripArray) tetra)
          .setCoordinateIndices(0, indices);
      ((IndexedTriangleStripArray) tetra).setColorIndices(0, indices);
    }

    if (tetra != null)
      tetra.setCapability(GeometryArray.ALLOW_REF_DATA_WRITE);
    return tetra;
  }

  public void updateData(Geometry geometry) {
    int i;
    float val;
    float val1;
    if (updateIndex == 1) { // geometry
      // Translate the geometry by a small amount in x
      vertexCount++;
      if ((vertexCount & 1) == 1)
        val = 0.2f;
      else
        val = -0.2f;

      FloatBuffer indexedCoord = (FloatBuffer) indexedFloatBufferCoord
          .getBuffer();
      indexedCoord.rewind();
      FloatBuffer coord = (FloatBuffer) floatBufferCoord.getBuffer();
      coord.rewind();

      if (vertexIndex == 0) {
        // Do Indexed geometry
        for (i = 0; i < indexedCoord.limit(); i += 3) {
          val1 = indexedCoord.get(i);
          indexedCoord.put(i, val1 + val);
        }
        // Do non-indexed float geometry
        for (i = 0; i < coord.limit(); i += 3) {
          val1 = coord.get(i);
          coord.put(i, val1 + val);
        }
      }
    } else if (updateIndex == 2) { // colors
      colorCount++;
      if ((colorCount & 1) == 1)
        val = 0.4f;
      else
        val = -0.4f;

      FloatBuffer indexedColors = (FloatBuffer) indexedFloatBufferColor
          .getBuffer();
      indexedColors.rewind();
      FloatBuffer colors = (FloatBuffer) floatBufferColor.getBuffer();
      colors.rewind();

      if (colorIndex == 0) {
        // Do Indexed geometry
        for (i = 0; i < indexedColors.limit(); i += 3) {
          indexedColors.put(i, indexedColors.get(i) + val);
        }
        // Do non-indexed float geometry
        for (i = 0; i < colors.limit(); i += 3) {
          colors.put(i, colors.get(i) + val);
        }
      }

    }

  }
}


           
       










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