Game Development: launching a bullet and moving back

 

<Br/> Import Java. applet. *; <br/> Import Java. util. *; <br/> Import Java. AWT. *; <br/> Import Java. AWT. event. *; <br/> public class T6 extends applet implements runnable <br/>{< br/> thread tt; <br/> int appletwidth, appletheight; <br/> image offscreen, bullet, player, player2; <br/> graphics drawoffscreen; <br/> mediatracker MT; <br/> imagesprite2 GS1, fs1; <br/> bulletsprite2 zd1; <br/> Public void Init () {<br/> Mt = New mediatracker (this); <br/> resize (800,600); <br/> appletwidth = getsize (). width; <br/> appletheight = getsize (). height; <br/> bullet = getimage (getdocumentbase (), "ZD. GIF "); <br/> player = getimage (getdocumentbase ()," a2.gif "); <br/> player2 = getimage (getdocumentbase ()," a1.gif "); <br/> Mt. addimage (player, 0); <br/> Mt. addimage (player2, 0); <br/> Mt. addimage (bullet, 0); <br/> try {<br/> Mt. waitforall (); <br/>} Catch (exception e) {}< br/> GS1 = new imagesprite2 (player2, this, 0); <br/> fs1 = new imagesprite2 (player, this, 1 ); <br/> zd1 = new bulletsprite2 (bullet, this, appletwidth, appletheight); <br/> gs1.setsize (player2.getwidth (this), player2.getheight (this )); <br/> fs1.setsize (player. getwidth (this), player. getheight (this); <br/> zd1.setsize (bullet. getwidth (this), Bullet. getwidth (this); <br/> gs1.setlocation (10, 10 ); <Br/> fs1.setlocation (); <br/> offscreen = createimage (appletwidth, appletheight); <br/> drawoffscreen = offscreen. getgraphics (); <br/>}< br/> Public void start () {<br/> TT = new thread (this); <br/> TT. start (); <br/>}< br/> Public void stop () {TT = NULL ;}< br/> Public void run () <br/>{< br/> int I2 = 0; <br/> while (TT! = NULL) <br/>{< br/> repaint (); <br/> try {<br/> thread. sleep (33); <br/>}catch (exception e) {}< br/> gs1.updatestate (); <br/> fs1.updatestate (); <br/> zd1.updatestate (); <br/> If (I2 ++> 10) <br/>{< br/> start1 (); <br/> I2 = 0; <br/>}< br/> If (zd1.hit2 (fs1.getx (), fs1.gety (), fs1.getwidth (), fs1.getheight ())) <br/>{< br/> zd1.setbullet (false); <br/>}< br/> If (fs1.hit2 (zd1.getx (), zd1.gety (), zd1.getwidth (), zd1.getheight () <br/>{< br/> fs1.setlocation (fs1.getx () + 2, fs1.gety ()); <br/>}< br/> Public void paint (Graphics g) <br/>{< br/> drawoffscreen. clearrect (0,0, appletwidth, appletheight); <br/> gs1.paintsprite (drawoffscreen); <br/> fs1.paintsprite (drawoffscreen); <br/> zd1.paintsprite (drawoffscreen ); <br/> G. drawimage (OFFSCREEN, 0, 0, this); <br/>}< br/> Public void Update (Graphics g) {paint (g );} <br/> Public void start1 () <br/> {<br/> If (zd1.canvisible () = false & <br/> zd1.canmove () = false) <br/>{< br/> zd1.setlocation (gs1.getx () + gs1.getwidth (), gs1.gety () + (gs1.getheight ()/2 )); <br/> zd1.setvisible (true); <br/> zd1.setmove (true); <br/>}< br/> 

 

Import Java. applet. *; <br/> Import Java. util. *; <br/> Import Java. AWT. *; <br/> Import Java. AWT. event. *; <br/> abstract class supersprite <br/>{< br/> int X, Y, width, height; <br/> Boolean visible, active; <br/> Abstract Public void paintsprite (Graphics g); <br/> Abstract Public void updatestate (); <br/> Public int getx () {return X ;} <br/> Public int Gety () {return y ;}< br/> Public void setlocation (int x, int y) <br/>{< br/> This. X = x; <br/> This. y = y; <br/>}< br/> Public int getwidth () <br/>{< br/> return width; <br/>}< br/> Public int getheight () <br/>{< br/> return height; <br/>}< br/> Public void setsize (INT width, int height) <br/>{< br/> This. width = width; <br/> This. height = height; <br/>}< br/> Public Boolean canvisible () <br/>{< br/> return visible; <br/>}< br/> Public void setvisible (Boolean v) <br/>{< br/> visible = V; <br/>}< br/> Public Boolean canmove () <br/>{< br/> return active; <br/>}< br/> Public void setmove (Boolean m) <br/>{< br/> active = m; <br/>}< br/>} 

 

Import Java. applet. *; <br/> Import Java. util. *; <br/> Import Java. AWT. *; <br/> Import Java. AWT. event. *; </P> <p> class imagesprite2 extends supersprite <br/>{< br/> int VX, Vy; <br/> image spriteimage; <br/> applet game; <br/> Boolean showpig; <br/> Public imagesprite2 (image spriteimage, Applet game, int VX) <br/>{< br/> This. spriteimage = spriteimage; <br/> This. game = game; <br/> This. VX = VX; <br/> showpig = false; <br/> setlocation (0, 0); <br/> setvisible (true); <br/> setmove (true ); <br/>}< br/> Public void updatestate () <br/>{< br/> If (active) <br/>{< br/> X + = VX; <br/> // y + = Vy; <br/>}< br/> // system. out. println (x); <br/> // system. out. println (y); <br/> // If (x> 640 | Y> 480) | (x <0 | Y <0 )) <br/> If (x> 800 | Y> 600) | (x <0 | Y <0 )) <br/>{< br/> // showpig = false; <br/> vx =-VX; <br/> // Vy =-Vy; <br/>}else {<br/> // showpig = true; <br/> showpig = true; <br/>}< br/> Public void paintsprite (Graphics g) <br/>{< br/> If (visible) <br/> {<br/> G. drawimage (spriteimage, X, Y, game); <br/>}< br/> Public Boolean hit (int x, // coordinate of the current X of the other Party <br/> int y, // coordinate of the current y of the other Party <br/> int p_width, // length of your own image <br/> int p_height, // height of your own image <br/> int h_width, // length of the Target Image <br/> int h_height // height of the Target Image <br/>) <br/>{< br/> If (<br/> (this. X + p_width> = x) & <br/> // (this. X + 40> = x) & <br/> (this. Y + p_height> = y) & <br/> // (this. Y + 40> = y) & <br/> (x + h_width> = This. x) & <br/> // (x + 40> = This. x) & <br/> (Y + h_height> = This. y) & <br/> // (Y + 40> = This. y) & <br/> // showpig <br/>) <br/>{< br/> // showpig = false; <br/> showpig = false; <br/> // setvisible (false); <br/> // setmove (false); <br/> return true; <br/>}else <br/> return false; <br/>}< br/> Public Boolean hit2 (INT Dix, <br/> int DIY, <br/> int di_width, <br/> int di_height) <br/>{< br/> If (<br/> (this. X + this. width> = Dix) & <br/> (this. Y + this. height> = DIY) & <br/> (Dix + di_width> = This. x) & <br/> (DIY + di_height> = This. y) & <br/> showpig <br/>) {<br/>/* system. out. println (Dix); <br/> system. out. println (DIY); <br/> system. out. println (di_width); <br/> system. out. println (di_height); <br/> system. out. println (showpig); <br/> system. out. println (); <br/> system. out. println (this. x); <br/> system. out. println (this. y); <br/> system. out. println (this. width); <br/> system. out. println (this. height); */<br/> showpig = false; <br/> return true; <br/>} else <br/> return false; <br/>}< br/> 

 

<Br/> Import Java. applet. *; <br/> Import Java. util. *; <br/> Import Java. AWT. *; <br/> Import Java. AWT. event. *; </P> <p> class bulletsprite2 extends imagesprite2 <br/>{< br/> int appletwidth, appletheight; <br/> Boolean bullet = true; <br/> Public bulletsprite2 (image bullet, Applet game, int appletwidth, int appletheight) <br/>{< br/> super (bullet, game, 0 ); <br/> This. appletwidth = appletwidth; <br/> This. appletheight = appletheight; <br/> setvisible (false); <br/> setmove (false); <br/> // system. out. println (showpig); <br/> showpig = true; <br/>}< br/> Public void updatestate () <br/>{< br/> If (active) <br/>{< br/> If (x> appletwidth) <br/>{< br/> setvisible (false); <br/> setmove (false ); <br/> showpig = false; <br/>} else if (bullet = false) {<br/> setvisible (false); <br/> setmove (false ); <br/> // system. out. println ("Bullet =" + bullet); <br/> bullet = true; <br/> // system. out. println ("Bullet =" + bullet); <br/> showpig = false; <br/>}else {<br/> showpig = true; <br/> X = x + 10; <br/>}< br/> Public void paintsprite (Graphics g) <br/>{< br/> If (visible) <br/>{< br/> G. drawimage (spriteimage, X, Y, game); <br/>}< br/> Public Boolean getbullet () <br/>{< br/> return bullet; <br/>}< br/> Public void setbullet (Boolean v) <br/>{< br/> This. bullet = V; <br/>}< br/>}