The Java Boutique: BreakOut - Interesting variation on the old breakout game.

// // Breakout game // // (C)2000 // Brian Postma // b.postma@hetnet.nl // import java.awt.*; import java.applet.Applet; public class Breakout extends Applet implements Runnable { Dimension d; Font largefont = new Font("Helvetica", Font.BOLD, 24); Font smallfont = new Font("Helvetica", Font.BOLD, 14); FontMetrics fmsmall, fmlarge; Graphics goff; Image ii; Thread thethread; boolean ingame=false; int player1score; int ballx,bally; int batpos; int batdpos=0; int balldx=0, balldy=0; int dxval; int ballsleft; int count; boolean showtitle=true; boolean[] showbrick; int bricksperline; final int borderwidth=5; final int batwidth=20; final int ballsize=5; final int batheight=5; final int scoreheight=20; final int screendelay=300; final int brickwidth=15; final int brickheight=8; final int brickspace=2; final int backcol=0x102040; final int numlines=4; final int startline=32; public String getAppletInfo() { return("Breakout - by Brian Postma"); } public void init() { Graphics g; d = size(); setBackground(new Color(backcol)); bricksperline=(d.width-2*borderwidth)/(brickwidth+brickspace); d.width=bricksperline*(brickwidth+brickspace)+(2*borderwidth); g=getGraphics(); g.setFont(smallfont); fmsmall = g.getFontMetrics(); g.setFont(largefont); fmlarge = g.getFontMetrics(); showbrick=new boolean[bricksperline*numlines]; GameInit(); } public void GameInit() { batpos=(d.width-batwidth)/2; ballx=(d.width-ballsize)/2; bally=(d.height-ballsize-scoreheight-2*borderwidth); player1score=0; ballsleft=3; dxval=2; if (Math.random()<0.5) balldx=dxval; else balldx=-dxval; balldy=-dxval; count=screendelay; batdpos=0; InitBricks(); } public void InitBricks() { int i; for (i=0; i0 && d.height>0) { ii = createImage(d.width, d.height); goff = ii.getGraphics(); } if (goff==null || ii==null) return; goff.setColor(new Color(backcol)); goff.fillRect(0, 0, d.width, d.height); if (ingame) PlayGame(); else ShowIntroScreen(); g.drawImage(ii, 0, 0, this); } public void PlayGame() { MoveBall(); CheckBat(); CheckBricks(); DrawPlayField(); DrawBricks(); ShowScore(); } public void ShowIntroScreen() { String s; MoveBall(); CheckBat(); CheckBricks(); BatDummyMove(); DrawPlayField(); DrawBricks(); ShowScore(); goff.setFont(largefont); goff.setColor(new Color(96,128,255)); if (showtitle) { s="Java Breakout"; goff.drawString(s,(d.width-fmlarge.stringWidth(s)) / 2, (d.height-scoreheight-borderwidth)/2 - 20); s="(c)2000 by Brian Postma"; goff.setFont(smallfont); goff.setColor(new Color(255,160,64)); goff.drawString(s,(d.width-fmsmall.stringWidth(s))/2,(d.height-scoreheight-borderwidth)/2 + 10); s="b.postma@hetnet.nl"; goff.drawString(s,(d.width-fmsmall.stringWidth(s))/2,(d.height-scoreheight-borderwidth)/2 + 30); } else { goff.setFont(smallfont); goff.setColor(new Color(96,128,255)); s="'S' to start game"; goff.drawString(s,(d.width-fmsmall.stringWidth(s))/2,(d.height-scoreheight-borderwidth)/2 - 10); goff.setColor(new Color(255,160,64)); s="Use cursor left and right to move"; goff.drawString(s,(d.width-fmsmall.stringWidth(s))/2,(d.height-scoreheight-borderwidth)/2 + 20); } count--; if (count<=0) { count=screendelay; showtitle=!showtitle; } } public void DrawBricks() { int i,j; boolean nobricks=true; int colordelta=255/(numlines-1); for (j=0; j=(d.height-ballsize-scoreheight)) { if (ingame) { ballsleft--; if (ballsleft<=0) ingame=false; } ballx=batpos+(batwidth-ballsize)/2; bally=startline+numlines*(brickheight+brickspace); balldy=dxval; balldx=0; } if (ballx>=(d.width-borderwidth-ballsize)) { balldx=-balldx; ballx=d.width-borderwidth-ballsize; } if (ballx<=borderwidth) { balldx=-balldx; ballx=borderwidth; } } public void BatDummyMove() { if (ballx<(batpos+2)) batpos-=3; else if (ballx>(batpos+batwidth-3)) batpos+=3; } public void CheckBat() { batpos+=batdpos; if (batpos(d.width-borderwidth-batwidth)) batpos=(d.width-borderwidth-batwidth); if (bally>=(d.height-scoreheight-2*borderwidth-ballsize) && bally<(d.height-scoreheight-2*borderwidth) && (ballx+ballsize)>=batpos && ballx<=(batpos+batwidth)) { bally=d.height-scoreheight-ballsize-borderwidth*2; balldy=-dxval; balldx=CheckBatBounce(balldx,ballx-batpos); } } public int CheckBatBounce(int dy, int delta) { int sign; int stepsize, i=-ballsize, j=0; stepsize=(ballsize+batwidth)/8; if (dy>0) sign=1; else sign=-1; while(ii) { i+=stepsize; j++; } switch(j) { case 0: case 1: return -4; case 2: return -3; case 7: return 3; case 3: case 6: return sign*2; case 4: case 5: return sign*1; default: return 4; } } public void CheckBricks() { int i,j,x,y; int xspeed=balldx; if (xspeed<0) xspeed=-xspeed; int ydir=balldy; if (bally<(startline-ballsize) || bally>(startline+numlines*(brickspace+brickheight))) return; for (j=0; j=(y-ballsize) && bally<(y+brickheight) && ballx>=(x-ballsize) && ballx<(x+brickwidth)) { showbrick[j*bricksperline+i]=false; if (ingame) player1score+=(numlines-j); // Where did we hit the brick if (ballx>=(x-ballsize) && ballx<=(x-ballsize+3)) { // leftside balldx=-xspeed; } else if (ballx<=(x+brickwidth-1) && ballx>=(x+brickwidth-4)) { // rightside balldx=xspeed; } balldy=-ydir; } } } } } public void run() { long starttime; Graphics g; Thread.currentThread().setPriority(Thread.MAX_PRIORITY); g=getGraphics(); while(true) { starttime=System.currentTimeMillis(); try { paint(g); starttime += 20; Thread.sleep(Math.max(0, starttime-System.currentTimeMillis())); } catch (InterruptedException e) { break; } } } public void start() { if (thethread == null) { thethread = new Thread(this); thethread.start(); } } public void stop() { if (thethread != null) { thethread.stop(); thethread = null; } } }