/*
* @(#)Balls.java 1.18 99/09/07
*
* Copyright (c) 1998, 1999 by Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* 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
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
package demos.Mix;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import javax.swing.*;
import AnimatingControlsSurface;
import CustomControls;
/**
* Animated color bouncing balls with custom controls.
*/
public class Balls extends AnimatingControlsSurface {
private static Color colors[] =
{ Color.red, Color.orange, Color.yellow, Color.green.darker(),
Color.blue, new Color(75, 00, 82), new Color(238,130,238) };
private long now, deltaT, lasttime;
private boolean active;
protected Ball balls[] = new Ball[colors.length];
protected boolean clearToggle;
protected JComboBox combo;
public Balls() {
setBackground(Color.white);
for (int i = 0; i < colors.length; i++) {
balls[i] = new Ball(colors[i], 30);
}
balls[0].isSelected = true;
balls[3].isSelected = true;
balls[4].isSelected = true;
balls[6].isSelected = true;
setControls(new Component[] { new DemoControls(this) });
}
public void reset(int w, int h) {
if (w > 400 && h > 100) {
combo.setSelectedIndex(5);
}
}
public void step(int w, int h) {
if (lasttime == 0) {
lasttime = System.currentTimeMillis();
}
now = System.currentTimeMillis();
deltaT = now - lasttime;
active = false;
for (int i = 0; i < balls.length; i++) {
if (balls[i] == null) {
return;
}
balls[i].step(deltaT, w, h);
if (balls[i].Vy > .02 || -balls[i].Vy > .02 ||
balls[i].y + balls[i].bsize < h) {
active = true;
}
}
if (!active) {
for (int i = 0; i < balls.length; i++) {
balls[i].Vx = (float)Math.random() / 4.0f - 0.125f;
balls[i].Vy = -(float)Math.random() / 4.0f - 0.2f;
}
clearToggle = true;
}
}
public void render(int w, int h, Graphics2D g2) {
for (int i = 0; i < balls.length; i++) {
Ball b = balls[i];
if (b == null || b.imgs[b.index] == null || !b.isSelected) {
continue;
}
g2.drawImage(b.imgs[b.index], (int) b.x, (int) b.y, this);
}
lasttime = now;
}
public static void main(String argv[]) {
createDemoFrame(new Balls());
}
static class Ball {
public int bsize;
public float x, y;
public float Vx = 0.1f;
public float Vy = 0.05f;
public int nImgs = 5;
public BufferedImage imgs[];
public int index = (int) (Math.random() * (nImgs-1));
private final float inelasticity = .96f;
private final float Ax = 0.0f;
private final float Ay = 0.0002f;
private final float Ar = 0.9f;
private final int UP = 0;
private final int DOWN = 1;
private int indexDirection = UP;
private boolean collision_x, collision_y;
private float jitter;
private Color color;
private boolean isSelected;
public Ball(Color color, int bsize) {
this.color = color;
makeImages(bsize);
}
public void makeImages(int bsize) {
this.bsize = bsize*2;
int R = bsize;
byte[] data = new byte[R * 2 * R * 2];
int maxr = 0;
for (int Y = 2 * R; --Y >= 0;) {
int x0 = (int) (Math.sqrt(R * R - (Y - R) * (Y - R)) + 0.5);
int p = Y * (R * 2) + R - x0;
for (int X = -x0; X < x0; X++) {
int x = X + 15;
int y = Y - R + 15;
int r = (int) (Math.sqrt(x * x + y * y) + 0.5);
if (r > maxr) {
maxr = r;
}
data[p++] = r <= 0 ? 1 : (byte) r;
}
}
imgs = new BufferedImage[nImgs];
int bg = 255;
byte red[] = new byte[256];
red[0] = (byte) bg;
byte green[] = new byte[256];
green[0] = (byte) bg;
byte blue[] = new byte[256];
blue[0] = (byte) bg;
for (int r = 0; r < imgs.length; r++) {
float b = 0.5f + (float) ((r+1f)/imgs.length/2f);
for (int i = maxr; i >= 1; --i) {
float d = (float) i / maxr;
red[i] = (byte) blend(blend(color.getRed(), 255, d), bg, b);
green[i] = (byte) blend(blend(color.getGreen(), 255, d), bg, b);
blue[i] = (byte) blend(blend(color.getBlue(), 255, d), bg, b);
}
IndexColorModel icm = new IndexColorModel(8, maxr + 1,
red, green, blue, 0);
DataBufferByte dbb = new DataBufferByte(data, data.length);
int bandOffsets[] = {0};
WritableRaster wr = Raster.createInterleavedRaster(dbb,
R*2,R*2,R*2,1, bandOffsets,null);
imgs[r] = new BufferedImage(icm, wr,icm.isAlphaPremultiplied(),null);
}
}
private final int blend(int fg, int bg, float fgfactor) {
return (int) (bg + (fg - bg) * fgfactor);
}
public void step(long deltaT, int w, int h) {
collision_x = false;
collision_y = false;
jitter = (float) Math.random() * .01f - .005f;
x += Vx * deltaT + (Ax / 2.0) * deltaT * deltaT;
y += Vy * deltaT + (Ay / 2.0) * deltaT * deltaT;
if (x <= 0.0f) {
x = 0.0f;
Vx = -Vx * inelasticity + jitter;
collision_x = true;
}
if (x + bsize >= w) {
x = w - bsize;
Vx = -Vx * inelasticity + jitter;
collision_x = true;
}
if (y <= 0) {
y = 0;
Vy = -Vy * inelasticity + jitter;
collision_y = true;
}
if (y + bsize >= h) {
y = h - bsize;
Vx *= inelasticity;
Vy = -Vy * inelasticity + jitter;
collision_y = true;
}
Vy = Vy + Ay * deltaT;
Vx = Vx + Ax * deltaT;
if (indexDirection == UP) {
index++;
}
if (indexDirection == DOWN) {
--index;
}
if (index+1 == nImgs) {
indexDirection = DOWN;
}
if (index == 0) {
indexDirection = UP;
}
}
} // End class Ball
class DemoControls extends CustomControls implements ActionListener {
Balls demo;
JToolBar toolbar;
public DemoControls(Balls demo) {
super(demo.name);
this.demo = demo;
setBackground(Color.gray);
add(toolbar = new JToolBar());
toolbar.setFloatable(false);
addTool("Clear", true);
addTool("R", demo.balls[0].isSelected);
addTool("O", demo.balls[1].isSelected);
addTool("Y", demo.balls[2].isSelected);
addTool("G", demo.balls[3].isSelected);
addTool("B", demo.balls[4].isSelected);
addTool("I", demo.balls[5].isSelected);
addTool("V", demo.balls[6].isSelected);
add(combo = new JComboBox());
combo.addItem("10");
combo.addItem("20");
combo.addItem("30");
combo.addItem("40");
combo.addItem("50");
combo.addItem("60");
combo.addItem("70");
combo.addItem("80");
combo.setSelectedIndex(2);
combo.addActionListener(this);
}
public void addTool(String str, boolean state) {
JButton b = (JButton) toolbar.add(new JButton(str));
b.setBackground(state ? Color.green : Color.lightGray);
b.setSelected(state);
b.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() instanceof JComboBox) {
int size = Integer.parseInt((String) combo.getSelectedItem());
for (int i = 0; i < demo.balls.length; i++) {
demo.balls[i].makeImages(size);
}
return;
}
JButton b = (JButton) e.getSource();
b.setSelected(!b.isSelected());
b.setBackground(b.isSelected() ? Color.green : Color.lightGray);
if (b.getText().equals("Clear")) {
demo.clearSurface = b.isSelected();
} else {
int index = toolbar.getComponentIndex(b)-1;
demo.balls[index].isSelected = b.isSelected();
}
}
public Dimension getPreferredSize() {
return new Dimension(200,37);
}
public void run() {
try { thread.sleep(999); } catch (Exception e) { return; }
Thread me = Thread.currentThread();
((JButton) toolbar.getComponentAtIndex(2)).doClick();
while (thread == me) {
try {
thread.sleep(222);
} catch (InterruptedException e) { return; }
if (demo.clearToggle) {
if (demo.clearSurface) {
combo.setSelectedIndex((int) (Math.random()*5));
}
((JButton) toolbar.getComponentAtIndex(0)).doClick();
demo.clearToggle = false;
}
}
thread = null;
}
} // End DemoControls
} // End Balls
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