Mega Code Archive
Geometry By Reference NIO
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/*
* @(#)GeometryByReferenceNIOBuffer.java 1.7 02/10/21 13:42:07
*
* Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
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*/
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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