java烟花动态程序.zip

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 // ); } }