OK, so for my final programming assignment I have to make a game that can be played over a network. I basically only need it to work on my computer and my partner's computer. I have written most of the code for alien movements, shooting, dying etc but I am completely stuck on the networking bit. I have looked up tutorials and stuff, but I can't seem to figure out how to apply it to my game. Would anyone be able to give me an idea of what I should be doing?

Here's my code, if you have any questions about it ask away (I have attached a pic of what the game basically looks like so you have some visual, (the game screen ends at the white line on the right)

Thanks!

import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;

import java.lang.Math;
import java.applet.*;
import java.util.*;


public class Invaders extends Applet implements Runnable{

//MISC. IMAGES
Image p1, p2, p1shot, p2shot, shield1, shield2, divider, nil, abloon;

//XY POSITIONS (NOT SHOTS)
int p1_x = 184, p2_x = (431+184);

int ay[] = new int[4];
int ax[] = new int[5];

//SHOTS
int p1shot_x, p1shot_y;
boolean p1fired = false;

Image ashot[][] = new Image[5][4];
int ashot_y[][] = new int[5][4];
int ashot_x[][] = new int[5][4];
boolean afired[][] = new boolean[5][4];
int randshot[][] = new int[5][4];

//HEIGHTS/WIDTHS
int awidth = 46, aheight = 36;
int bwidth = 46, bheight = 36;
int mwidth = 13, mheight = 19;
int swidth = 123;
int pwidth = 51, pheight = 25;

//ALIENS
Image[][] a = new Image[5][4];
boolean[][] adestroy = new boolean[5][4];
boolean aright = true;

//ALIEN COUNT
int[] clmn = new int[5];
int acount = 20, aspeed = 0;

//DYING VARIABLES
int p1dieX = 20;
int p2dieX = 20;
boolean p1die=false, p2die=false;

//SHIELD
Image[] shield1X = new Image[12];
Image[] shield2X = new Image[12];
boolean sdestroy1 = false, sdestroy2=false;
int SX1 = 0, SX2 = 0;

//BLOON
int bx = -bwidth, randb, bcount;

int[] randbshot = new int[6];
Image[] missile = new Image[6];
int[] mx = new int[6];
int[] my = new int[6];
Image qmark;
Image[] qmarkX = new Image[2];
boolean bdestroy = true, bright = false;
boolean[] bfired = {false, false, false, false, false, false};



//BUFFERING/KEYS
int keys[];
private Image dbImage;
private Graphics dbg;

//TESTING
Font font = new Font("monospaced", Font.BOLD, 25);
int number1 = 0, number2 = 0;

public void init()
{


for(int x=0;x<5;x++)
for(int y=0;y<4;y++)
{
ax[x] = (25 + 63*x);
ay[y] = (73*y+50);
adestroy[x][y] = false;
afired[x][y] = false;
clmn[x] = 4;
}


setBackground(Color.black);
keys = new int[256];
Arrays.fill(keys,0); // 0 = key is up
enableEvents(AWTEvent.KEY_EVENT_MASK);

p1 = getImage(getDocumentBase(), "p1.PNG");
p2 = getImage(getDocumentBase(), "p2.PNG");
p1shot = getImage(getDocumentBase(), "p1shot.PNG");
p2shot = getImage(getDocumentBase(), "p2shot.PNG");
for(int i=0;i<5;i++) a[i][0] = getImage(getDocumentBase(), "a1.PNG");
for(int i=0;i<5;i++) a[i][1] = getImage(getDocumentBase(), "a2.PNG");
for(int i=0;i<5;i++) a[i][2] = getImage(getDocumentBase(), "a3.PNG");
for(int i=0;i<5;i++) a[i][3] = getImage(getDocumentBase(), "a4.PNG");
for(int i=0;i<5;i++) abloon = getImage(getDocumentBase(), "a5.PNG");
for(int i=0;i<5;i++) ashot[i][0] = getImage(getDocumentBase(), "ashot1.PNG");
for(int i=0;i<5;i++) ashot[i][1] = getImage(getDocumentBase(), "ashot2.PNG");
for(int i=0;i<5;i++) ashot[i][2] = getImage(getDocumentBase(), "ashot3.PNG");
for(int i=0;i<5;i++) ashot[i][3] = getImage(getDocumentBase(), "ashot4.PNG");
for(int i=0;i<6;i++) missile[i] = getImage(getDocumentBase(), "missile.PNG");

//Shield decreases in size when hit
shield1X[0] = getImage(getDocumentBase(), "shield1a.PNG");
shield1X[1] = getImage(getDocumentBase(), "shield1b.PNG");
shield1X[2] = getImage(getDocumentBase(), "shield1c.PNG");
shield1X[3] = getImage(getDocumentBase(), "shield1d.PNG");
shield1X[4] = getImage(getDocumentBase(), "shield1e.PNG");
shield1X[5] = getImage(getDocumentBase(), "shield1f.PNG");
shield1X[6] = getImage(getDocumentBase(), "shield1g.PNG");
shield1X[7] = getImage(getDocumentBase(), "shield1h.PNG");
shield1X[8] = getImage(getDocumentBase(), "shield1i.PNG");
shield1X[9] = getImage(getDocumentBase(), "shield1j.PNG");
shield1X[10] = getImage(getDocumentBase(), "shield1k.PNG");
shield1X[11] = getImage(getDocumentBase(), "shield1l.PNG");

shield2X[0] = getImage(getDocumentBase(), "shield2a.PNG");
shield2X[1] = getImage(getDocumentBase(), "shield2b.PNG");
shield2X[2] = getImage(getDocumentBase(), "shield2c.PNG");
shield2X[3] = getImage(getDocumentBase(), "shield2d.PNG");
shield2X[4] = getImage(getDocumentBase(), "shield2e.PNG");
shield2X[5] = getImage(getDocumentBase(), "shield2f.PNG");
shield2X[6] = getImage(getDocumentBase(), "shield2g.PNG");
shield2X[7] = getImage(getDocumentBase(), "shield2h.PNG");
shield2X[8] = getImage(getDocumentBase(), "shield2i.PNG");
shield2X[9] = getImage(getDocumentBase(), "shield2j.PNG");
shield2X[10] = getImage(getDocumentBase(), "shield2k.PNG");
shield2X[11] = getImage(getDocumentBase(), "shield2l.PNG");

qmarkX[0] = getImage(getDocumentBase(), "qmark1.PNG");
qmarkX[1] = getImage(getDocumentBase(), "qmark2.PNG");

divider = getImage(getDocumentBase(), "divider.PNG");
nil = getImage(getDocumentBase(), "nil.PNG");

setForeground(Color.white);
}

public void processKeyEvent(KeyEvent e)
{
// the 0xff below binds the key code to below 256
int key = (e.getKeyCode()&0xff);
if (e.getID() == KeyEvent.KEY_PRESSED) {
keys[key] = 1; // 1 = key is down
}
else if (e.getID() == KeyEvent.KEY_RELEASED) {
keys[key] = 0; // 0 = key is up
}
repaint();
}

public void start()
{
// define a new thread
Thread th = new Thread (this);
// start this thread
th.start ();
}

public void stop() {}
public void destroy() {}

public void run ()
{
Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
while(true)
{
try
{
// Stop thread for x milliseconds
Thread.sleep (;
}
catch (InterruptedException ex) {}

if (p1die) p1 = getImage(getDocumentBase(), "p1die.PNG");
else p1 = getImage(getDocumentBase(), "p1.PNG");

if (!p1die)
{
if (keys[37] == 1) //left
{
if (p1_x>0) p1_x--;
}

if (keys[39] == 1) //left
{
if (p1_x < (430-pwidth)) p1_x++;
}

if ((keys[32] == 1) && (!p1fired)) //space
{
p1fired = true;
p1shot_x = p1_x + 25;
p1shot_y = 588;
}
}

//p1's shot
if (p1fired)
{
p1shot_y-=5;
if (p1shot_y<0) p1fired = false;
}


//left/right boolean
for(int i=0;i<5;i++)
{
if (aright) ax[i]++;
else ax[i] --;
}

//dying counter
if (p1dieX >0) p1dieX--;
else if (p1dieX == 0)
{
if (SX1 < 3) SX1 = 0;
else SX1-=3;

sdestroy1 = false;
p1_x = 184;
p1die = false;
p1dieX = -1;
}

//aliens collide with right wall
if (
((clmn[4]>0) && (ax[4]>=(430-awidth))) ||
((clmn[4]==0) && (clmn[3]>0) && (ax[3]>=(430-awidth))) ||
((clmn[4]==0) && (clmn[3]==0) && (clmn[2]>0) && (ax[2]>=(430-awidth))) ||
((clmn[4]==0) && (clmn[3]==0) && (clmn[2]==0) && (clmn[1]>0) && (ax[1]>=(430-awidth))) ||
((clmn[4]==0) && (clmn[3]==0) && (clmn[2]==0) && (clmn[1]==0) && (clmn[0]>0) && (ax[0]>=(430-awidth)))
)
{
aright = false;
for(int y=0;y<4;y++) ay[y]+=15;
}

//aliens collide with left wall
if (
((clmn[0]>0) && (ax[0]<0)) ||
((clmn[0]==0) && (clmn[1]>0) && (ax[1]<0)) ||
((clmn[0]==0) && (clmn[1]==0) && (clmn[2]>0) && (ax[2]<0)) ||
((clmn[0]==0) && (clmn[1]==0) && (clmn[2]==0) && (clmn[3]>0) && (ax[3]<0)) ||
((clmn[0]==0) && (clmn[1]==0) && (clmn[2]==0) && (clmn[3]==0) && (clmn[4]>0) && (ax[4]<0))
)
{
aright = true;
for(int y=0;y<4;y++) ay[y]+=15;
}

//aliens are shot
for (int x=0;x<5;x++)
for (int y=0;y<4;y++)
{ //referring to shot
if (
(
((p1shot_x<=ax[x]) && (p1shot_x>=ax[x]+awidth)) || //left x intersects
((p1shot_x+4<=ax[x]+awidth) && (p1shot_x+4>=ax[x])) //right x intersects
)
&&
(
((p1shot_y >= ay[y]) && (p1shot_y <= ay[y] + aheight)) || //top intersects
((p1shot_y + 11 >= ay[y]) && (p1shot_y <= ay[y] + aheight)) //bottom intersects
)
&&
(!adestroy[x][y]) //the alien isn't already destroyed
&&
(p1fired)
)
{
p1fired = false;
adestroy[x][y] = true;
clmn[x]--;
acount--;
}


//aliens shoot
//random shot intervals
if (acount > 15) randshot[x][y] = (int)(Math.random() * 700);
else if (acount > 10) randshot[x][y] = (int)(Math.random() * 500);
else if (acount > 5) randshot[x][y] = (int)(Math.random() * 300);
else randshot[x][y] = (int)(Math.random() * 100);

if ((randshot[x][y] == 1) && (!afired[x][y]) && (!adestroy[x][y]))
{
afired[x][y] = true;
ashot_y[x][y] = ay[y] + aheight;
ashot_x[x][y] = ax[x] + awidth/2;
}

if (afired[x][y])
{
ashot_y[x][y]+=4;
}

if (ashot_y[x][y] > 623) afired[x][y] = false;



//player is hit by ashot
if (
(
((ashot_x[x][y]<=p1_x) && (ashot_x[x][y]>=p1_x+pwidth)) || //left x intersects
((ashot_x[x][y]+4<=p1_x+pwidth) && (ashot_x[x][y]+4>=p1_x)) //right x intersects
)
&&
(ashot_y[x][y] + 11 >= 58
&&
(afired[x][y])
&&
(!p1die)
)
{
afired[x][y] = false;

p1die = true;
p1dieX = 100;
}

//player is hit by missile
for (int i=0;i<6;i++)
{
if
(
(
((mx[i]<=p1_x) && (mx[i]>=p1_x+pwidth)) || //left x intersects
((mx[i]+mwidth<=p1_x+pwidth) && (mx[i]+mwidth>=p1_x)) //right x intersects
)
&&
(my[i] + mheight >= 58
&&
(bfired[i])
&&
(!p1die)
)
{
p1die = true;
p1dieX = 100;
bfired[i] = false;
}

//missile hits shield
if (
(
((mx[i]<=146) && (mx[i]>=146+swidth)) || //left x intersects
((mx[i]+mwidth<=146+swidth) && (mx[i]+mwidth>=146)) //right x intersects
)
&&
(my[i] + mheight >= 537 + 2*SX1)
&&
(bfired[i])
&&
(!sdestroy1)
)
{
if (SX1 < 10) SX1+=2;
else sdestroy1 = true;
bfired[i] = false;
}
}

//alien shot hits shield
if (
(
((ashot_x[x][y]<=146) && (ashot_x[x][y]>=146+swidth)) || //left x intersects
((ashot_x[x][y]+4<=146+swidth) && (ashot_x[x][y]+4>=146)) //right x intersects
)
&&
(ashot_y[x][y] + 11 >= 537 + 2*SX1)
&&
(afired[x][y])
&&
(!sdestroy1)
)
{
if (SX1 < 11) SX1++;
else sdestroy1 = true;
afired[x][y] = false;
}

//player hits shield
if (
(
((p1shot_x<=146) && (p1shot_x>=146+swidth)) || //left x intersects
((p1shot_x+4<=146+swidth) && (p1shot_x+4>=146)) //right x intersects
)
&&
(p1shot_y <= 537 + 24) && (p1shot_y > 537)
&&
(p1fired)
&&
(!sdestroy1)
)
{
if (SX1 < 11) SX1++;
else sdestroy1 = true;
p1fired=false;
}

shield1 = shield1X[SX1];
}

//BLOON
if (!bdestroy)
{
//left/right boolean
if (bright) bx+=2;
else bx-=2;

//bounce off of wall
if ((bx+bwidth>=863) && (bcount>0) && (bright))
{
bcount--;
bright = false;
}
if ((bx<=0) && (bcount>0) && (!bright))
{
bcount--;
bright = true;
}

//destroy if out of bounds
if ((bx+bwidth<-3) || (bx>865)) bdestroy = true;

//shooting
for (int i = bcount*-2+4;i<bcount*-2+6;i++)
if ((Math.abs(randbshot[i]-bx)<2) && (!bfired[i]))
{
bfired[i] = true;
mx[i] = bx+18;
my[i] = 43;
}

for (int i=0;i<6;i++) if (bfired[i]) my[i] +=5;

}
else
{
for (int i=0;i<6;i++) bfired[i] = false;
randb = (int)(Math.random() * 22);
// if the number is one, bloon alien will enter
if (randb == 1)
{
bdestroy = false;
if (bright)
{
bx = 863;
bright = false;
}
else
{
bx = -bwidth;
bright = true;
}
bcount = 2;
randb = 0;
for (int i=0;i<6;i++) randbshot[i] = (int)(Math.random() * (863-bwidth));
}
}

repaint();
Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
}
}

public void update (Graphics g)
{

// initialize buffer
if (dbImage == null)
{
dbImage = createImage (this.getSize().width, this.getSize().height);
dbg = dbImage.getGraphics ();
}

// clear screen in background
dbg.setColor (getBackground ());
dbg.fillRect (0, 0, this.getSize().width, this.getSize().height);

// draw elements in background
dbg.setColor (getForeground());
paint (dbg);

// draw image on the screen
g.drawImage (dbImage, 0, 0, this);
}

public void paint(Graphics g)
{
g.setFont(font);

for (int y=0;y<4;y++)
for (int x=0;x<5;x++)
{
if (!adestroy[x][y]) g.drawImage(a[x][y],(ax[x]), (ay[y]),this);
if (afired[x][y]) g.drawImage(ashot[x][y],ashot_x[x][y],ashot_y[x][y],this);
}

g.drawImage (p1, p1_x, 588, this);
g.drawImage (p2, p2_x, 588, this);

// g.drawString("", 500, 30);

g.drawImage (divider, 430, 0, this);

if(!sdestroy1)g.drawImage(shield1, 146,537,this);
if(!bdestroy)g.drawImage(abloon,bx,11,this);
if (p1fired) g.drawImage (p1shot,p1shot_x,p1shot_y,this);
for (int i=0;i<6;i++) if (bfired[i]) g.drawImage(missile[i], mx[i],my[i], this);


}
}

Filename	game.bmp	Download
Description
Filesize	1729 Kbytes
Downloaded:	52 time(s)

This message was edited 2 times. Last update was at 06/10/2008 08:33:41