/* * %W% %E% * * Copyright (c) 1994-1995 Sun Microsystems, Inc. All Rights Reserved. * * Permission to use, copy, modify, and distribute this software * and its documentation for NON-COMMERCIAL or COMMERCIAL purposes and * without fee is hereby granted. * Please refer to the file http://java.sun.com/copy_trademarks.html * for further important copyright and trademark information and to * http://java.sun.com/licensing.html for further important licensing * information for the Java (tm) Technology. * * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. * * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES"). SUN * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR * HIGH RISK ACTIVITIES. */ import java.util.Hashtable; import java.applet.*; import java.io.*; import java.awt.*; import java.net.*; /** * @author Jonathan Payne * @version %I%, %G% */ class BounceImage { static float inelasticity = .96f; static float Ax = 0.0f; static float Ay = 0.0002f; static float Ar = 0.9f; public float x = 0; public float y = 0; public int width; public int height; public float Vx = 0.1f; public float Vy = 0.05f; public int index; public float Vr = 0.005f + (float)Math.random() * 0.001f; public float findex = 0f; BounceItem parent; static boolean imagesReadIn = false; public void play(int n) { if (parent.sounds[n] != null) { parent.sounds[n].play(); } } public BounceImage(BounceItem parent) { this.parent = parent; width = 65; height = 72; } public void move(float x1, float y1) { x = x1; y = y1; } public void paint(Graphics g) { int i = index; if (parent.bounceimages[i] == null) { i = 0; } g.drawImage(parent.bounceimages[i], (int)x, (int)y, null); } public void step(long deltaT) { boolean collision_x = false; boolean collision_y = false; float 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; play((int)(Math.random() * 3)); } Dimension d = parent.size(); if (x + width >= d.width) { x = d.width - width; Vx = -Vx * inelasticity + jitter; collision_x = true; play((int)(Math.random() * 3)); } if (y <= 0) { y = 0; Vy = -Vy * inelasticity + jitter; collision_y = true; play((int)(Math.random() * 3)); } if (y + height >= d.height) { y = d.height - height; Vx *= inelasticity; Vy = -Vy * inelasticity + jitter; collision_y = true; } move(x, y); Vy = Vy + Ay * deltaT; Vx = Vx + Ax * deltaT; findex += Vr * deltaT; if (collision_x || collision_y) { Vr *= Ar; } while (findex <= 0.0) { findex += parent.bounceimages.length; } index = ((int) findex) % parent.bounceimages.length; } } public class BounceItem extends Applet implements Runnable { boolean images_initialized = false; BounceImage images[]; boolean time_to_die; AudioClip music; AudioClip sounds[]; Image bounceimages[]; public BounceItem() { } void makeImages(int nimages) { bounceimages = new Image[8]; for (int i = 1 ; i <= 8 ; i++) { bounceimages[i-1] = getImage(getCodeBase(), "images/jon/T" + i + ".gif"); //System.out.println("d = " + bounceimages[i-1].getWidth() + "," + bounceimages[i-1].getHeight()); } images = new BounceImage[nimages]; for (int i = 0; i < nimages; i++) { BounceImage img = images[i] = new BounceImage(this); img.move(1 + img.width * .8f * (i % 3) + i / 3 * .3f * img.width, img.height * .3f + (i % 3) * .3f * img.height); } sounds = new AudioClip[4]; sounds[0] = getAudioClip(getCodeBase(), "audio/ooh.au"); sounds[1] = getAudioClip(getCodeBase(), "audio/ah.au"); sounds[2] = getAudioClip(getCodeBase(), "audio/dah.au"); sounds[3] = getAudioClip(getCodeBase(), "audio/gong.au"); music = getAudioClip(getCodeBase(), "audio/spacemusic.au"); } public void run() { long lasttime; try { if (images == null) { System.out.println("Making images ..."); makeImages(4); } if (music != null) { music.loop(); } lasttime = System.currentTimeMillis(); while (!time_to_die) { int i; long now = System.currentTimeMillis(); long deltaT = now - lasttime; boolean active = false; Dimension d = size(); for (i = 0; i < images.length; i++) { BounceImage img = images[i]; img.step(deltaT); if (img.Vy > .05 || -img.Vy > .05 || img.y + img.width < d.height - 10) { active = true; } } if (!active && images.length != 0) { for (i = 0; i < images.length; i++) { BounceImage img = images[i]; img.Vx = (float)Math.random() / 4.0f - 0.125f; img.Vy = -(float)Math.random() / 4.0f - 0.2f; img.Vr = 0.05f - (float)Math.random() * 0.1f; } if (sounds[3] != null) { sounds[3].play(); } } repaint(); lasttime = now; try { Thread.sleep(100); } catch (InterruptedException e) { return; } } } finally { if (music != null) { music.stop(); } } } public void init() { Dimension d = size(); if ((d.width <= 100) || (d.height <= 100)) { resize(500, 300); } } public void start() { time_to_die = false; (new Thread(this)).start(); } public void stop() { time_to_die = true; music.stop(); } public void paint(Graphics g) { Dimension d = size(); g.setColor(Color.gray); g.drawRect(0, 0, d.width - 1, d.height - 1); if (images != null) { for (int i = 0; i < images.length; i++) { if (images[i] != null) { images[i].paint(g); } } } } }
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