传说中的Java烟花程序

2024-07-05 22:33| 来源: 网络整理| 查看: 265

相信看到这些美丽的烟花图片，你会发现原来java也可以这么美

并且还是用awt做的，更是实属不易，但在此声明此程序并非出自本人之手

只是个人觉得这么美好的东西不应该被埋没于时间中，应该让更多人知道它的美

在此特将我收藏的烟花程序的代码贴出来与大家分享

同时也非常感谢这位牛人把这么好程序放到网上给人学习，让你我受益

主程序：

App.java

import java.applet.Applet; import java.awt.Frame; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class App extends Applet { public void init() { Canvas canvas = new Canvas(); canvas.setSize(getWidth(), getHeight()); add(canvas); canvas.gravity = Double.parseDouble(getParameter("gravity")) / 100; canvas.damp = Double.parseDouble(getParameter("damp")) / 100; canvas.skyrocketVelocity = Double .parseDouble(getParameter("skyrocketVelocity")) / -1; canvas.skyrocketWidth = Integer .parseInt(getParameter("skyrocketWidth")); canvas.skyrocketHeight = Integer .parseInt(getParameter("skyrocketHeight")); canvas.pieceNumber = Integer.parseInt(getParameter("pieceNumber")); canvas.pieceInitialVelocity = Double .parseDouble(getParameter("pieceInitialVelocity")); canvas.pieceDarkerFactor = Double .parseDouble(getParameter("pieceDarkerFactor")) / 100; canvas.pieceWidth = Integer.parseInt(getParameter("pieceWidth")); canvas.pieceHeight = Integer.parseInt(getParameter("pieceHeight")); canvas.traceDarkerFactor = Double .parseDouble(getParameter("traceDarkerFactor")) / 100; canvas.init(); } public static void main(String[] args) throws Exception { Frame frame = new Frame(); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); Canvas canvas = new Canvas(); canvas.setSize(400, 400); frame.add(canvas); frame.pack(); frame.setLocationRelativeTo(null); frame.show(); canvas.gravity = 1.0; canvas.damp = 0.75; canvas.skyrocketVelocity = -82; canvas.skyrocketWidth = 4; canvas.skyrocketHeight = 8; canvas.pieceNumber = 200; canvas.pieceInitialVelocity = 72; canvas.pieceDarkerFactor = 0.90; canvas.pieceWidth = 1; canvas.pieceHeight = 2; canvas.traceDarkerFactor = 0.70; canvas.frameDelay = 50; canvas.init(); } } 其它为辅助程序：

Canvas.java

import java.awt.Color; import java.awt.Graphics; import java.awt.Image; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.util.Random; import java.util.TreeSet; import javax.swing.Timer; class Canvas extends java.awt.Canvas { double gravity = 1.0; double damp = 0.75; double skyrocketVelocity = -82; int skyrocketWidth = 4; int skyrocketHeight = 8; int pieceNumber = 200; double pieceInitialVelocity = 72; double pieceDarkerFactor = 0.90; int pieceWidth = 1; int pieceHeight = 2; double traceDarkerFactor = 0.70; int frameDelay = 40; int border = 10; Random random = new Random(System.currentTimeMillis()); int currentTime; TreeSet things = new TreeSet(); Skyrocket currentSkyrocket; Image offscreenImage; Graphics offscreenGraphics; void init() { setBackground(Color.BLACK); offscreenImage = createImage(getWidth(), getHeight()); offscreenGraphics = offscreenImage.getGraphics(); addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { onMousePress(e); } public void mouseReleased(MouseEvent e) { onMouseRelease(e); } }); addKeyListener(new KeyAdapter() { public void keyPressed(KeyEvent e) { onKeyPress(e); } }); new Timer(frameDelay, new ActionListener() { public void actionPerformed(ActionEvent e) { repaint(); } }).start(); requestFocus(); } void onMousePress(MouseEvent e) { if (currentSkyrocket != null) currentSkyrocket.explode(); int r = random.nextInt(256); int g = random.nextInt(256); int b = random.nextInt(256); int max = r > g ? r : g; max = max > b ? max : b; double brighter = 255.0 / max; r = (int) (r * brighter); g = (int) (g * brighter); b = (int) (b * brighter); Color color = new Color(r, g, b); currentSkyrocket = new Skyrocket(this, color, e.getX()); things.add(currentSkyrocket); } void onMouseRelease(MouseEvent e) { if (currentSkyrocket != null) { currentSkyrocket.explode(); currentSkyrocket = null; } } void onKeyPress(KeyEvent e) { if (e.getKeyCode() == KeyEvent.VK_Q) { gravity += 0.01; } if (e.getKeyCode() == KeyEvent.VK_A) { gravity -= 0.01; if (gravity < 0) gravity = 0; } if (e.getKeyCode() == KeyEvent.VK_W) { damp += 0.01; if (damp > 1) damp = 1; } if (e.getKeyCode() == KeyEvent.VK_S) { damp -= 0.01; if (damp < 0) damp = 0; } if (e.getKeyCode() == KeyEvent.VK_E) { skyrocketVelocity -= 1; } if (e.getKeyCode() == KeyEvent.VK_D) { skyrocketVelocity += 1; if (skyrocketVelocity > 0) skyrocketVelocity = 0; } if (e.getKeyCode() == KeyEvent.VK_R) { skyrocketWidth += 1; } if (e.getKeyCode() == KeyEvent.VK_F) { skyrocketWidth -= 1; if (skyrocketWidth < 1) skyrocketWidth = 1; } if (e.getKeyCode() == KeyEvent.VK_T) { skyrocketHeight += 1; } if (e.getKeyCode() == KeyEvent.VK_G) { skyrocketHeight -= 1; if (skyrocketHeight < 1) skyrocketHeight = 1; } if (e.getKeyCode() == KeyEvent.VK_Y) { pieceNumber += 10; } if (e.getKeyCode() == KeyEvent.VK_H) { pieceNumber -= 10; if (pieceNumber < 0) pieceNumber = 0; } if (e.getKeyCode() == KeyEvent.VK_U) { pieceInitialVelocity += 1; } if (e.getKeyCode() == KeyEvent.VK_J) { pieceInitialVelocity -= 1; if (pieceInitialVelocity < 0) pieceInitialVelocity = 0; } if (e.getKeyCode() == KeyEvent.VK_I) { pieceDarkerFactor += 0.01; if (pieceDarkerFactor > 1) pieceDarkerFactor = 1; } if (e.getKeyCode() == KeyEvent.VK_K) { pieceDarkerFactor -= 0.01; if (pieceDarkerFactor < 0) pieceDarkerFactor = 0; } if (e.getKeyCode() == KeyEvent.VK_O) { pieceWidth += 1; } if (e.getKeyCode() == KeyEvent.VK_L) { pieceWidth -= 1; if (pieceWidth < 1) pieceWidth = 1; } if (e.getKeyCode() == KeyEvent.VK_P) { pieceHeight += 1; } if (e.getKeyCode() == KeyEvent.VK_SEMICOLON) { pieceHeight -= 1; if (pieceHeight < 1) pieceHeight = 1; } if (e.getKeyCode() == KeyEvent.VK_OPEN_BRACKET) { traceDarkerFactor += 0.01; if (traceDarkerFactor > 1) traceDarkerFactor = 1; } if (e.getKeyCode() == KeyEvent.VK_QUOTE) { traceDarkerFactor -= 0.01; if (traceDarkerFactor < 0) traceDarkerFactor = 0; } System.out.println("g" + (int) (gravity * 100) + " " + "d" + (int) (damp * 100) + " " + "sv" + (int) (-skyrocketVelocity * 1) + " " + "sw" + (int) (skyrocketWidth * 1) + " " + "sh" + (int) (skyrocketHeight * 1) + " " + "pn" + (int) (pieceNumber * 1) + " " + "pv" + (int) (pieceInitialVelocity * 1) + " " + "pf" + (int) (pieceDarkerFactor * 100) + " " + "pw" + (int) (pieceWidth * 1) + " " + "ph" + (int) (pieceHeight * 1) + " " + "tf" + (int) (traceDarkerFactor * 100)); } public void update(Graphics g) { paint(g); } long totalPaintTime; public void paint(Graphics g) { if (offscreenImage == null) return; long time1 = System.currentTimeMillis(); System.gc(); long time2 = System.currentTimeMillis(); offscreenGraphics.clearRect(0, 0, getWidth(), getHeight()); TreeSet things2 = new TreeSet(); while (!things.isEmpty()) { Thing thing = (Thing) things.first(); things.remove(thing); thing.paint(); if (thing.stateDead || thing.stateX < -border || thing.stateY > getWidth() + border || thing.stateY < -border || thing.stateY > getHeight() + border) { } else { things2.add(thing); } } things = things2; g.drawImage(offscreenImage, 0, 0, this); long time3 = System.currentTimeMillis(); totalPaintTime += time3 - time1; currentTime++; // System.out.println( // "("+(time2-time1)+") "+totalPaintTime+" / "+currentTime+" = "+totalPaintTime/currentTime // ); } } Piece.java

import java.awt.Color; import java.awt.Graphics2D; class Piece extends Thing { Color traceColor; double velocityX, velocityY; Piece(Canvas canvas, Color traceColor, double originX, double originY, double velocity, double angle) { super(canvas); // System.out.println( // "sn,1011;color,"+color.getRGB()+";x,"+originX+",y"+originY+";v,"+velocity+";a,"+angle+";" // ); color = Color.white; width = canvas.pieceWidth; height = canvas.pieceHeight; stateX = originX; stateY = originY; this.traceColor = traceColor; velocityX = velocity * Math.cos(angle); velocityY = velocity * Math.sin(angle); } void draw(Graphics2D g, int time) { Trace trace = new Trace(this); trace.color = traceColor; canvas.things.add(trace); velocityX *= canvas.damp; velocityY += canvas.gravity; velocityY *= canvas.damp; stateY += velocityY; stateX += velocityX; // System.out.println( // "sn,1012;x,"+stateX+",y,"+stateY+";vx,"+velocityX+";vy,"+velocityY+";" // ); g.fillRect((int) stateX, (int) stateY, width, height); color = new Color((int) (color.getRed() * canvas.pieceDarkerFactor), (int) (color.getGreen() * canvas.pieceDarkerFactor), (int) (color.getBlue() * canvas.pieceDarkerFactor)); if (color.getRed() + color.getGreen() + color.getBlue() < 10) stateDead = true; } } Skyrocket.java

import java.awt.Color; import java.awt.Graphics2D; class Skyrocket extends Thing { Skyrocket(Canvas canvas, Color color, int originX) { super(canvas); // System.out.println( "sn,1021;color,"+color.getRGB()+";x,"+originX+";" // ); this.color = color; width = canvas.skyrocketWidth; height = canvas.skyrocketHeight; velocity = canvas.skyrocketVelocity; stateX = originX; stateY = canvas.getHeight(); } void draw(Graphics2D g, int time) { // canvas.things.add( new Trace(this) ); velocity += canvas.gravity; velocity *= canvas.damp; stateY += velocity; g.fillOval((int) stateX, (int) stateY, width, height); } void explode() { for (int i = 0; i < canvas.pieceNumber; i++) { double angleXy = canvas.random.nextDouble() * 2 * Math.PI; double angleZ = canvas.random.nextDouble() * 2 * Math.PI; double pieceVelocity = canvas.pieceInitialVelocity * Math.cos(angleZ); Piece piece = new Piece(canvas, color, stateX, stateY, pieceVelocity, angleXy); canvas.things.add(piece); } stateDead = true; } } Thing.java

import java.awt.Color; import java.awt.Graphics2D; abstract class Thing implements Comparable { Canvas canvas; int birthTime; Color color; int width, height; double stateX, stateY, velocity; boolean stateDead; Thing(Canvas canvas) { this.canvas = canvas; birthTime = canvas.currentTime; } void paint() { Graphics2D g = (Graphics2D) canvas.offscreenGraphics; int time = canvas.currentTime - birthTime; g.setColor(color); draw(g, time); } abstract void draw(Graphics2D g, int time); public int compareTo(Object o) { Thing thing = (Thing) o; if (birthTime > thing.birthTime) return -1; if (birthTime < thing.birthTime) return 1; if (equals(thing)) return 0; return -1; } } Trace.java

import java.awt.Color; import java.awt.Graphics2D; class Trace extends Thing { double velocityX, velocityY; Trace(Thing thing) { super(thing.canvas); this.color = thing.color; this.width = thing.width; this.height = thing.height; stateX = thing.stateX; stateY = thing.stateY; } void draw(Graphics2D g, int time) { g.fillRect((int) stateX, (int) stateY, width, height); color = new Color((int) (color.getRed() * canvas.traceDarkerFactor), (int) (color.getGreen() * canvas.traceDarkerFactor), (int) (color.getBlue() * canvas.traceDarkerFactor)); if (color.getRed() + color.getGreen() + color.getBlue() < 10) stateDead = true; } }

程序还可以在html中查看

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