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Java Source | 2002-09-06 | 11.5 KB | 347 lines |
- /*
- * Copyright (c) 2002 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * -Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * -Redistribution in binary form must reproduct the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of contributors
- * may 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 LIABLE FOR ANY DAMAGES OR LIABILITIES SUFFERED BY LICENSEE AS A RESULT
- * OF OR RELATING TO USE, MODIFICATION OR DISTRIBUTION OF 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.
- *
- * You acknowledge that Software is not designed, licensed or intended for
- * use in the design, construction, operation or maintenance of any nuclear
- * facility.
- */
-
- /*
- * @(#)Balls.java 1.22 02/06/13
- */
-
- package java2d.demos.Mix;
-
- import java.awt.*;
- import java.awt.image.*;
- import java.awt.event.*;
- import javax.swing.*;
- import java2d.AnimatingControlsSurface;
- import java2d.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
-