Renders a 3D shape using a 3D rendering engine that was written from scratch
/**********************************************************
Copyright (C) 2001 Daniel Selman
First distributed with the book "Java 3D Programming"
by Daniel Selman and published by Manning Publications.
http://manning.com/selman
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation, version 2.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
The license can be found on the WWW at:
http://www.fsf.org/copyleft/gpl.html
Or by writing to:
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Authors can be contacted at:
Daniel Selman: daniel@selman.org
If you make changes you think others would like, please
contact one of the authors or someone at the
www.j3d.org web site.
**************************************************************/
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferByte;
import java.awt.image.IndexColorModel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.util.LinkedList;
import java.util.List;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.LineArray;
import javax.media.j3d.PointArray;
import javax.media.j3d.QuadArray;
import javax.media.j3d.Shape3D;
import javax.media.j3d.TriangleArray;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.RepaintManager;
import javax.swing.WindowConstants;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector3f;
import com.sun.j3d.loaders.Scene;
import com.sun.j3d.loaders.objectfile.ObjectFile;
/**
* Renders a 3D shape using a 3D rendering engine that was written from scratch
* using AWT for graphics operations.
*/
public class MyJava3D extends JFrame {
private static int m_kWidth = 400;
private static int m_kHeight = 400;
private RenderingEngine renderingEngine = new AwtRenderingEngine();
private GeometryUpdater geometryUpdater = new RotatingGeometryUpdater();
private RenderingSurface renderingSurface;
public MyJava3D() {
// load the object file
Scene scene = null;
Shape3D shape = null;
// read in the geometry information from the data file
ObjectFile objFileloader = new ObjectFile(ObjectFile.RESIZE);
try {
scene = objFileloader.load("hand1.obj");
} catch (Exception e) {
scene = null;
System.err.println(e);
}
if (scene == null)
System.exit(1);
// retrieve the Shape3D object from the scene
BranchGroup branchGroup = scene.getSceneGroup();
shape = (Shape3D) branchGroup.getChild(0);
GeometryArray geometryArray = (GeometryArray) shape.getGeometry();
// add the geometry to the rendering engine...
renderingEngine.addGeometry(geometryArray);
// create a rendering surface and bind the rendering engine
renderingSurface = new RenderingSurface(renderingEngine,
geometryUpdater);
// start the rendering surface and add it to the content panel
renderingSurface.start();
getContentPane().add(renderingSurface);
// disable automatic close support for Swing frame.
setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
// adds the window listener
addWindowListener(new WindowAdapter() {
// handles the system exit window message
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {
MyJava3D myJava3D = new MyJava3D();
myJava3D.setTitle("MyJava3D");
myJava3D.setSize(300, 300);
myJava3D.setVisible(true);
}
}
/**
* Definition of the RenderingEngine interface. A RenderingEngine can rendering
* 3D geometry (described using a Java 3D GeometryArray) into a 2D Graphics
* context.
*/
interface RenderingEngine {
/**
* Adds a GeometryArray to the RenderingEngine. All GeometryArrays will be
* rendered.
*/
public void addGeometry(GeometryArray geometryArray);
/**
* Renders a single frame into the Graphics.
*/
public void render(Graphics graphics, GeometryUpdater updater);
/**
* Get the current Screen position used by the RenderEngine.
*/
public Vector3d getScreenPosition();
/**
* Get the current View Angle used by the RenderEngine. View angles are
* expressed in degrees.
*/
public Vector3d getViewAngle();
/**
* Set the current View Angle used by the RenderEngine.
*/
public void setViewAngle(Vector3d viewAngle);
/**
* Get the current View Angle used by the RenderEngine. View angles are
* expressed in degrees.
*/
public Vector3d getLightAngle();
/**
* Set the current View Angle used by the RenderEngine.
*/
public void setLightAngle(Vector3d angle);
/**
* Set the Screen size used by the RenderEngine.
*/
public void setScreenSize(int width, int height);
/**
* Set the scale used by the RenderEngine.
*/
public void setScale(double scale);
/**
* Get the scale used by the RenderEngine.
*/
public double getScale();
}
/**
* Surface (JPanel) that uses a RenderingEngine to render a 3D scene. A
* GeometryUpdater is used to update the scene and RenderEngine parameters.
*/
class RenderingSurface extends AnimatingSurface {
RenderingEngine engine = null;
GeometryUpdater updater = null;
public RenderingSurface(RenderingEngine engine, GeometryUpdater updater) {
this.engine = engine;
this.updater = updater;
setBackground(Color.gray);
}
public void render(int w, int h, Graphics2D g2) {
engine.setScreenSize(w, h);
engine.render(g2, updater);
}
public void step(int w, int h) {
}
public void reset(int newwidth, int newheight) {
}
}
/**
* Definition of the GeometryUpdater interface. GeometryUpdater instances can be
* used to modify the geometry of a model, change RenderingEngine parameters, or
* modify Graphics parameters during frame rendering.
*/
interface GeometryUpdater {
public boolean update(Graphics graphics, RenderingEngine engine,
GeometryArray geometry, int index, long frameNumber);
}
/**
* Implementation of the RenderingEngine interface using AWT.
*/
class AwtRenderingEngine implements RenderingEngine {
private List geometryList = null;
private int xScreenCenter = 320 / 2;
private int yScreenCenter = 240 / 2;
private Vector3d screenPosition = new Vector3d(0, 0, 20);
private Vector3d viewAngle = new Vector3d(180, 180, 180);
private Vector3d lightAngle = new Vector3d(0, 0, 0);
private double CT;
private double ST;
private double CP;
private double SP;
private static final double DEG_TO_RAD = 0.017453292;
private static final int NUM_POINTS = 4;
private int[] xCoordArray = new int[NUM_POINTS];
private int[] yCoordArray = new int[NUM_POINTS];
private Point3d[] pointArray = new Point3d[NUM_POINTS];
private Point3d[] projectedPointArray = new Point3d[NUM_POINTS];
private long frameNumber = 0;
private static final int POINT_WIDTH = 1;
private static final int POINT_HEIGHT = 1;
private double modelScale = 20;
private long startTime = 0;
private boolean drawBackface = true;
private boolean computeIntensity = true;
private boolean lightRelativeToView = true;
private Vector3d lightAngleOffset = new Vector3d(45, 45, 45);
private Vector3f[] normalsArray = new Vector3f[NUM_POINTS];
private Vector3f light = new Vector3f();
private Vector3f surf_norm = new Vector3f();
private Vector3f view = new Vector3f();
private Vector3f temp = new Vector3f();
private static final double lightAmbient = 0.30;
private static final double lightDiffuse = 0.50;
private static final double lightSpecular = 0.20;
private static final double lightGlossiness = 5.0;
private static final int lightMax = 255;
public AwtRenderingEngine() {
geometryList = new LinkedList();
for (int n = 0; n < NUM_POINTS; n++) {
pointArray[n] = new Point3d();
projectedPointArray[n] = new Point3d();
normalsArray[n] = new Vector3f();
}
setViewAngle(viewAngle);
setLightAngle(lightAngle);
}
public void setScale(double scale) {
modelScale = scale;
}
public double getScale() {
return modelScale;
}
public Vector3d getScreenPosition() {
return screenPosition;
}
public void setScreenSize(int width, int height) {
xScreenCenter = width / 2;
yScreenCenter = height / 2;
}
public void setScreenPosition(Vector3d screenPosition) {
this.screenPosition = screenPosition;
}
public Vector3d getViewAngle() {
return viewAngle;
}
public void setViewAngle(Vector3d angle) {
this.viewAngle = angle;
// System.out.println( "ViewAngle: " + viewAngle );
CT = Math.cos(DEG_TO_RAD * viewAngle.x);
ST = Math.sin(DEG_TO_RAD * viewAngle.x);
CP = Math.cos(DEG_TO_RAD * viewAngle.y);
SP = Math.sin(DEG_TO_RAD * viewAngle.y);
view.x = (float) (-CP * ST);
view.y = (float) (-CP * CT);
view.z = (float) SP;
if (lightRelativeToView != false) {
lightAngle.x = viewAngle.x + lightAngleOffset.x;
lightAngle.y = viewAngle.y + lightAngleOffset.y;
lightAngle.z = viewAngle.z + lightAngleOffset.z;
setLightAngle(lightAngle);
}
}
public Vector3d getLightAngle() {
return lightAngle;
}
public void setLightAngle(Vector3d angle) {
this.lightAngle = angle;
//System.out.println( "LightAngle: " + lightAngle );
CT = Math.cos(DEG_TO_RAD * viewAngle.x);
ST = Math.sin(DEG_TO_RAD * viewAngle.x);
CP = Math.cos(DEG_TO_RAD * viewAngle.y);
SP = Math.sin(DEG_TO_RAD * viewAngle.y);
light.x = (float) (Math.sin(DEG_TO_RAD * lightAngle.y) * Math
.cos(DEG_TO_RAD * lightAngle.x));
light.y = (float) (Math.sin(DEG_TO_RAD * lightAngle.y) * Math
.sin(DEG_TO_RAD * lightAngle.x));
light.z = (float) (Math.cos(DEG_TO_RAD * lightAngle.y));
}
public void addGeometry(GeometryArray geometryArray) {
System.out.println("Adding GeometryArray: " + geometryArray);
geometryList.add(geometryArray);
}
public void renderGeometry(Graphics graphics, GeometryUpdater updater) {
GeometryArray geomArray;
for (int n = 0; n < geometryList.size(); n++) {
geomArray = (GeometryArray) geometryList.get(n);
if (geomArray instanceof LineArray) {
renderLineArray(graphics, updater, geomArray);
} else if (geomArray instanceof PointArray) {
renderPointArray(graphics, updater, geomArray);
} else if (geomArray instanceof QuadArray) {
renderQuadArray(graphics, updater, geomArray);
} else if (geomArray instanceof TriangleArray) {
renderTriangleArray(graphics, updater, geomArray);
} else {
throw new UnsupportedOperationException(
"Unknown geometry type: " + geomArray);
}
}
}
public void renderLineArray(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray) {
for (int n = 0; n < geometryArray.getVertexCount(); n += 2)
drawLine(graphics, updater, geometryArray, n);
}
public void renderPointArray(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray) {
for (int n = 0; n < geometryArray.getVertexCount(); n++)
drawPoint(graphics, updater, geometryArray, n);
}
public void renderQuadArray(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray) {
for (int n = 0; n < geometryArray.getVertexCount(); n += 4)
drawQuad(graphics, updater, geometryArray, n);
}
public void renderTriangleArray(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray) {
for (int n = 0; n < geometryArray.getVertexCount(); n += 3)
drawTriangle(graphics, updater, geometryArray, n);
}
public void render(Graphics graphics, GeometryUpdater updater) {
if (frameNumber == 0)
startTime = System.currentTimeMillis();
renderGeometry(graphics, updater);
frameNumber++;
if (frameNumber % 500 == 0) {
System.out.println("FPS: "
+ ((double) 500 / (System.currentTimeMillis() - startTime))
* 1000.0);
startTime = System.currentTimeMillis();
}
}
public void projectPoint(Point3d input, Point3d output) {
double x = screenPosition.x + input.x * CT - input.y * ST;
double y = screenPosition.y + input.x * ST * SP + input.y * CT * SP
+ input.z * CP;
double temp = viewAngle.z
/ (screenPosition.z + input.x * ST * CP + input.y * CT * CP - input.z
* SP);
output.x = xScreenCenter + modelScale * temp * x;
output.y = yScreenCenter - modelScale * temp * y;
output.z = 0;
}
public void drawLine(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray, int index) {
for (int n = 0; n < 2; n++) {
updater.update(graphics, this, geometryArray, index + n,
frameNumber);
geometryArray.getCoordinate(index + n, pointArray[n]);
}
for (int n = 0; n < 2; n++)
projectPoint(pointArray[n], projectedPointArray[n]);
drawLine(graphics, geometryArray, index, projectedPointArray);
}
public void drawLine(Graphics graphics, GeometryArray geometryArray,
int index, Point3d[] pointArray) {
int intensity = computeIntensity(geometryArray, index, 2);
if (drawBackface || intensity >= 1) {
graphics.setColor(new Color(intensity, intensity, intensity));
graphics.drawLine((int) pointArray[0].x, (int) pointArray[0].y,
(int) pointArray[1].x, (int) pointArray[1].y);
}
}
public void drawQuad(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray, int index) {
for (int n = 0; n < 4; n++)
updater.update(graphics, this, geometryArray, index + n,
frameNumber);
geometryArray.getCoordinates(index, pointArray);
for (int n = 0; n < 4; n++)
projectPoint(pointArray[n], projectedPointArray[n]);
drawQuad(graphics, geometryArray, index, projectedPointArray);
}
public void drawQuad(Graphics graphics, GeometryArray geometryArray,
int index, Point3d[] pointArray) {
drawFacet(graphics, geometryArray, index, pointArray, 4);
}
private void averageVector(Vector3f returnVector, Vector3f[] vectorArray,
int numPoints) {
float x = 0;
float y = 0;
float z = 0;
for (int n = 0; n < numPoints; n++) {
x += vectorArray[n].x;
y += vectorArray[n].y;
z += vectorArray[n].z;
}
returnVector.x = x / numPoints;
returnVector.y = y / numPoints;
returnVector.z = z / numPoints;
}
private int computeIntensity(GeometryArray geometryArray, int index,
int numPoints) {
int intensity = 0;
if (computeIntensity != false) {
// if we have a normal vector compute the intensity under the
// lighting
if ((geometryArray.getVertexFormat() & GeometryArray.NORMALS) == GeometryArray.NORMALS) {
double cos_theta;
double cos_alpha;
double cos_beta;
for (int n = 0; n < numPoints; n++)
geometryArray.getNormal(index + n, normalsArray[n]);
// take the average normal vector
averageVector(surf_norm, normalsArray, numPoints);
temp.set(view);
temp.scale(1.0f, surf_norm);
cos_beta = temp.x + temp.y + temp.z;
if (cos_beta > 0.0) {
cos_theta = surf_norm.dot(light);
if (cos_theta <= 0.0) {
intensity = (int) (lightMax * lightAmbient);
} else {
temp.set(surf_norm);
temp.scale((float) cos_theta);
temp.normalize();
temp.sub(light);
temp.normalize();
cos_alpha = view.dot(temp);
intensity = (int) (lightMax * (lightAmbient
+ lightDiffuse * cos_theta + lightSpecular
* Math.pow(cos_alpha, lightGlossiness)));
}
}
}
}
return intensity;
}
public void drawFacet(Graphics graphics, GeometryArray geometryArray,
int index, Point3d[] pointArray, int numPoints) {
int intensity = computeIntensity(geometryArray, index, numPoints);
if (drawBackface || intensity >= 1) {
for (int n = 0; n < numPoints; n++) {
xCoordArray[n] = (int) pointArray[n].x;
yCoordArray[n] = (int) pointArray[n].y;
}
graphics.setColor(new Color(intensity, intensity, intensity));
graphics.drawPolygon(xCoordArray, yCoordArray, numPoints);
}
}
public void drawPoint(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray, int index) {
updater.update(graphics, this, geometryArray, index, frameNumber);
geometryArray.getCoordinate(index, pointArray[0]);
projectPoint(pointArray[0], projectedPointArray[0]);
drawPoint(graphics, projectedPointArray);
}
public void drawPoint(Graphics graphics, Point3d[] pointArray) {
graphics.drawRect((int) pointArray[0].x, (int) pointArray[0].y,
POINT_WIDTH, POINT_HEIGHT);
}
public void drawTriangle(Graphics graphics, GeometryUpdater updater,
GeometryArray geometryArray, int index) {
for (int n = 0; n < 3; n++) {
updater.update(graphics, this, geometryArray, (index + n),
frameNumber);
geometryArray.getCoordinate((index + n), pointArray[n]);
}
for (int n = 0; n < 3; n++)
projectPoint(pointArray[n], projectedPointArray[n]);
drawTriangle(graphics, geometryArray, index, projectedPointArray);
}
public void drawTriangle(Graphics graphics, GeometryArray geometryArray,
int index, Point3d[] pointArray) {
drawFacet(graphics, geometryArray, index, pointArray, 3);
}
}
/**
* This class implements a rendering surface that will repaint itself
* continiously using a low-priority thread.
* <p>
* This class is based on the Java 2D demo examples.
*/
abstract class AnimatingSurface extends Surface implements Runnable {
public Thread thread;
public abstract void step(int w, int h);
public abstract void reset(int newwidth, int newheight);
public void start() {
if (thread == null) {
thread = new Thread(this);
thread.setPriority(Thread.MIN_PRIORITY);
thread.start();
}
}
public synchronized void stop() {
if (thread != null) {
thread.interrupt();
}
thread = null;
notifyAll();
}
public void run() {
Thread me = Thread.currentThread();
while (thread == me && !isShowing() || getSize().width == 0) {
try {
thread.sleep(200);
} catch (InterruptedException e) {
}
}
while (thread == me) {
repaint();
}
thread = null;
}
}
/**
* The Surface class implements a 2D rendering surface using a Swing JPanel. The
* Surface can contain an AlphaComposite and a background Texture as well as
* foreground rendered output.
* <p>
* The Surface can have anti-aliasing enabled and be optimized for speed or
* quality.
* <p>
* This class is based on that found in the Java 2D examples.
*/
abstract class Surface extends JPanel implements Printable {
public Object AntiAlias = RenderingHints.VALUE_ANTIALIAS_OFF;
public Object Rendering = RenderingHints.VALUE_RENDER_SPEED;
public AlphaComposite composite;
public Paint texture;
public String perfStr; // PerformanceMonitor
public BufferedImage bimg;
public int imageType;
public String name;
public boolean clearSurface = true;
public AnimatingSurface animating;
protected long sleepAmount = 0;
private long orig, start, frame;
private Toolkit toolkit;
private int biw, bih;
private boolean clearOnce;
public Surface() {
toolkit = getToolkit();
setImageType(0);
if (this instanceof AnimatingSurface) {
animating = (AnimatingSurface) this;
}
}
public int getImageType() {
return imageType;
}
public void setImageType(int imgType) {
if (imgType == 0) {
if (this instanceof AnimatingSurface) {
imageType = 2;
} else {
imageType = 1;
}
} else {
imageType = imgType;
}
bimg = null;
}
public void setAntiAlias(boolean aa) {
AntiAlias = aa ? RenderingHints.VALUE_ANTIALIAS_ON
: RenderingHints.VALUE_ANTIALIAS_OFF;
}
public void setRendering(boolean rd) {
Rendering = rd ? RenderingHints.VALUE_RENDER_QUALITY
: RenderingHints.VALUE_RENDER_SPEED;
}
public void setTexture(Object obj) {
if (obj instanceof GradientPaint) {
texture = new GradientPaint(0, 0, Color.white, getSize().width * 2,
0, Color.green);
} else {
texture = (Paint) obj;
}
}
public void setComposite(boolean cp) {
composite = cp ? AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
0.5f) : null;
}
public void setSleepAmount(long amount) {
sleepAmount = amount;
}
public long getSleepAmount() {
return sleepAmount;
}
public BufferedImage createBufferedImage(int w, int h, int imgType) {
BufferedImage bi = null;
if (imgType == 0) {
bi = (BufferedImage) createImage(w, h);
} else if (imgType > 0 && imgType < 14) {
bi = new BufferedImage(w, h, imgType);
} else if (imgType == 14) {
bi = createBinaryImage(w, h, 2);
} else if (imgType == 15) {
bi = createBinaryImage(w, h, 4);
}
biw = w;
bih = h;
return bi;
}
// Lookup tables for BYTE_BINARY 1, 2 and 4 bits.
static byte[] lut1Arr = new byte[] { 0, (byte) 255 };
static byte[] lut2Arr = new byte[] { 0, (byte) 85, (byte) 170, (byte) 255 };
static byte[] lut4Arr = new byte[] { 0, (byte) 17, (byte) 34, (byte) 51,
(byte) 68, (byte) 85, (byte) 102, (byte) 119, (byte) 136,
(byte) 153, (byte) 170, (byte) 187, (byte) 204, (byte) 221,
(byte) 238, (byte) 255 };
private BufferedImage createBinaryImage(int w, int h, int pixelBits) {
int[] pixels = new int[w * h];
int bytesPerRow = w * pixelBits / 8;
if (w * pixelBits % 8 != 0) {
bytesPerRow++;
}
byte[] imageData = new byte[h * bytesPerRow];
IndexColorModel cm = null;
switch (pixelBits) {
case 1:
cm = new IndexColorModel(pixelBits, lut1Arr.length, lut1Arr,
lut1Arr, lut1Arr);
break;
case 2:
cm = new IndexColorModel(pixelBits, lut2Arr.length, lut2Arr,
lut2Arr, lut2Arr);
break;
case 4:
cm = new IndexColorModel(pixelBits, lut4Arr.length, lut4Arr,
lut4Arr, lut4Arr);
break;
default: {
new Exception("Invalid # of bit per pixel").printStackTrace();
}
}
DataBuffer db = new DataBufferByte(imageData, imageData.length);
WritableRaster r = Raster.createPackedRaster(db, w, h, pixelBits, null);
return new BufferedImage(cm, r, false, null);
}
public Graphics2D createGraphics2D(int width, int height, BufferedImage bi,
Graphics g) {
Graphics2D g2 = null;
if (bi != null) {
g2 = bi.createGraphics();
} else {
g2 = (Graphics2D) g;
}
g2.setBackground(getBackground());
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, AntiAlias);
g2.setRenderingHint(RenderingHints.KEY_RENDERING, Rendering);
if (clearSurface || clearOnce) {
g2.clearRect(0, 0, width, height);
clearOnce = false;
}
if (texture != null) {
// set composite to opaque for texture fills
g2.setComposite(AlphaComposite.SrcOver);
g2.setPaint(texture);
g2.fillRect(0, 0, width, height);
}
if (composite != null) {
g2.setComposite(composite);
}
return g2;
}
// ...demos that extend Surface must implement this routine...
public abstract void render(int w, int h, Graphics2D g2);
/**
* It's possible to turn off double-buffering for just the repaint calls
* invoked directly on the non double buffered component. This can be done
* by overriding paintImmediately() (which is called as a result of repaint)
* and getting the current RepaintManager and turning off double buffering
* in the RepaintManager before calling super.paintImmediately(g).
*/
public void paintImmediately(int x, int y, int w, int h) {
RepaintManager repaintManager = null;
boolean save = true;
if (!isDoubleBuffered()) {
repaintManager = RepaintManager.currentManager(this);
save = repaintManager.isDoubleBufferingEnabled();
repaintManager.setDoubleBufferingEnabled(false);
}
super.paintImmediately(x, y, w, h);
if (repaintManager != null) {
repaintManager.setDoubleBufferingEnabled(save);
}
}
public void paint(Graphics g) {
Dimension d = getSize();
if (imageType == 1) {
bimg = null;
startClock();
} else if (bimg == null || biw != d.width || bih != d.height) {
if (animating != null && (biw != d.width || bih != d.height)) {
animating.reset(d.width, d.height);
}
bimg = createBufferedImage(d.width, d.height, imageType - 2);
clearOnce = true;
startClock();
}
if (animating != null && animating.thread != null) {
animating.step(d.width, d.height);
}
Graphics2D g2 = createGraphics2D(d.width, d.height, bimg, g);
render(d.width, d.height, g2);
g2.dispose();
if (bimg != null) {
g.drawImage(bimg, 0, 0, null);
toolkit.sync();
}
}
public int print(Graphics g, PageFormat pf, int pi) throws PrinterException {
if (pi >= 1) {
return Printable.NO_SUCH_PAGE;
}
Graphics2D g2d = (Graphics2D) g;
g2d.translate(pf.getImageableX(), pf.getImageableY());
g2d.translate(pf.getImageableWidth() / 2, pf.getImageableHeight() / 2);
Dimension d = getSize();
double scale = Math.min(pf.getImageableWidth() / d.width, pf
.getImageableHeight()
/ d.height);
if (scale < 1.0) {
g2d.scale(scale, scale);
}
g2d.translate(-d.width / 2.0, -d.height / 2.0);
if (bimg == null) {
Graphics2D g2 = createGraphics2D(d.width, d.height, null, g2d);
render(d.width, d.height, g2);
g2.dispose();
} else {
g2d.drawImage(bimg, 0, 0, this);
}
return Printable.PAGE_EXISTS;
}
private void startClock() {
orig = System.currentTimeMillis();
start = orig;
}
}
/**
* Implementation of the GeometryUpdater interface. That rotates the scene by
* changing the viewer position and the scale factor for the model.
*/
class RotatingGeometryUpdater implements GeometryUpdater {
long lastFrame = -1;
public RotatingGeometryUpdater() {
}
public boolean update(Graphics graphics, RenderingEngine engine,
GeometryArray geometry, int index, long frameNumber) {
if (lastFrame != frameNumber) {
lastFrame = frameNumber;
Vector3d viewAngle = engine.getViewAngle();
viewAngle.x += 1;
//viewAngle.y += 2;
engine.setViewAngle(viewAngle);
//Vector3d lightAngle = engine.getLightAngle( );
//lightAngle.x += 5;
//lightAngle.y += 2;
//engine.setLightAngle( lightAngle );
//engine.setScale( (50 * Math.sin( Math.PI *
// (System.currentTimeMillis() % 5000) / 5000.0 )) + 1 );
}
return false;
}
}
// File: hand1.obj
/*
# Mon Jun 02 17:09:33 1997
#
#
g hand1
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# 281 vertices
# 0 texture vertices
# 0 normals
usemtl hand
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f 222 237 236
f 222 89 237
f 236 231 235
f 231 236 234
f 237 234 236
f 234 237 84
f 217 239 238
f 217 218 239
f 219 239 218
f 239 219 235
f 239 225 238
f 225 239 228
f 239 231 228
f 239 235 231
f 220 208 76
f 208 220 240
f 213 240 220
f 240 213 241
f 208 232 80
f 208 240 232
f 240 229 232
f 240 241 229
f 241 226 229
f 226 241 242
f 241 212 242
f 241 213 212
f 242 223 226
f 223 242 243
f 242 211 243
f 242 212 211
f 244 248 247
f 244 245 248
f 246 248 245
f 248 246 249
f 248 250 247
f 250 248 251
f 249 251 248
f 251 249 252
f 250 254 253
f 250 251 254
f 252 254 251
f 254 252 255
f 253 91 93
f 253 254 91
f 254 89 91
f 254 255 89
f 256 260 259
f 256 257 260
f 258 260 257
f 260 258 261
f 260 262 259
f 262 260 263
f 260 264 263
f 260 261 264
f 97 265 95
f 265 97 266
f 84 266 97
f 266 84 267
f 265 257 256
f 265 266 257
f 267 257 266
f 257 267 258
f 249 268 252
f 268 249 269
f 249 270 269
f 249 246 270
f 269 258 268
f 258 269 261
f 269 264 261
f 269 270 264
f 255 237 89
f 237 255 271
f 252 271 255
f 271 252 268
f 271 84 237
f 84 271 267
f 268 267 271
f 267 268 258
f 102 253 93
f 253 102 272
f 102 265 272
f 102 95 265
f 272 250 253
f 250 272 273
f 272 256 273
f 272 265 256
f 259 273 256
f 273 259 274
f 262 274 259
f 274 262 275
f 273 247 250
f 273 274 247
f 274 244 247
f 274 275 244
f 172 159 158
f 159 172 276
f 172 170 276
f 172 168 170
f 276 109 159
f 109 276 143
f 170 143 276
f 143 170 125
f 151 154 119
f 154 151 277
f 151 166 277
f 151 139 166
f 154 175 157
f 154 277 175
f 277 167 175
f 277 166 167
f 197 278 210
f 197 194 278
f 191 278 194
f 278 191 205
f 278 185 210
f 185 278 184
f 278 183 184
f 278 205 183
f 223 279 224
f 223 243 279
f 211 279 243
f 279 211 214
f 279 225 224
f 225 279 238
f 279 217 238
f 279 214 217
f 262 280 275
f 262 263 280
f 264 280 263
f 280 264 270
f 280 244 275
f 244 280 245
f 270 245 280
f 245 270 246
f 74 281 71
f 74 203 281
f 82 281 203
f 281 82 79
f 71 149 61
f 71 281 149
f 79 149 281
f 149 79 51
# 552 elements
*/
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