Apologies for the recent interruption in service; I accidentally allowed the domain to expire.

Zap! Source

(Last Update 10:15 on Monday, 26 November 2001)

// Zap! applet
// Neil Rashbrook
// Last modified July 15 1998
import java.awt.*;
public final class zap extends java.applet.Applet implements Runnable {
final private static int WIDTH = 25, HEIGHT = 15;
//final private static Color EMPTY = null, ROBOT = Color.cyan, RUBBLE = Color.green, PLAYER = Color.yellow, DEAD = Color.red;
final private static int EMPTY = 0, RUBBLE = -1, PLAYER = -2, DEAD = -3;
private int field[][], robotx[], roboty[];
private int level, x, y, robots, zaps, safe, maxzaps, maxsafe, score;
private int key = -1;
private Thread t;
private String player;
private final int random(int limit) {
return (int)(Math.random() * limit) + 1;
}
private void newgame() {
level = 0;
zaps = 1;
safe = 1;
maxzaps = 2;
maxsafe = 2;
robots = 0;
score = 0;
}
private void newlevel() {
level++;
if (safe == maxsafe) safe++;
if (zaps == maxzaps) {
zaps++;
safe++;
}
maxzaps = zaps;
maxsafe = safe;
field = new int[WIDTH + 2][HEIGHT + 2];
x = random(WIDTH);
y = random(HEIGHT);
for (int i = x - 1; i <= x + 1; i++)
for (int j = y - 1; j <= y + 1; j++)
field[i][j] = RUBBLE;
robots = level * 6;
robotx = new int[robots + 1];
roboty = new int[robots + 1];
for (int i = 1; i < robotx.length; i++) {
int x, y;
do {
x = random(WIDTH);
y = random(HEIGHT);
} while (field[x][y] != EMPTY);
field[x][y] = i;
robotx[i] = x;
roboty[i] = y;
}
for (int i = x - 1; i <= x + 1; i++)
for (int j = y - 1; j <= y + 1; j++)
field[i][j] = EMPTY;
field[x][y] = PLAYER;
for (int i = 0; i < WIDTH + 2; i++) {
field[i][0] = RUBBLE;
field[i][HEIGHT + 1] = RUBBLE;
}
for (int j = 0; j < HEIGHT + 2; j++) {
field[0][j] = RUBBLE;
field[WIDTH + 1][j] = RUBBLE;
}
repaint();
}
public void destroy() {
t.interrupt();
}
public void init() {
player = getParameter("player");
if (player == null) player = "Anonymous";
else player = java.net.URLEncoder.encode(player);
t = new Thread(this, "Zap");
t.setDaemon(true);
t.start();
newgame();
newlevel();
//try {
//requestFocus();
//} finally {
//return;
//}
}
public boolean isFocusTraversable() {
return true;
}
public synchronized boolean keyDown(Event evt, int key) {
this.key = key;
notifyAll();
return false;
}
public void move() {
int x = this.x, y = this.y, key = this.key;
this.key = -1;
if ((robots == 0 || field[x][y] == DEAD) && key != 10 && key != 13) return;
switch (key) {
case '1': case 1001: y++; x--; break;
case '2': case 1005: y++; break;
case '3': case 1003: y++; x++; break;
case '4': case 1006: x--; break;
case '5': case ' ': case 0: break;
case '6': case 1007: x++; break;
case '7': case 1000: y--; x--; break;
case '8': case 1004: y--; break;
case '9': case 1002: y--; x++; break;
case 'w': case 'W': this.key = key; break;
case 10: case 13:
if (field[x][y] == DEAD) newgame();
if (robots == 0) newlevel();
return;
case 't': case 'T': case 20:
if (safe > 0) do {
x = random(WIDTH);
y = random(HEIGHT);
} while (field[x][y] != EMPTY
|| field[x - 1][y - 1] > 0 || field[x - 1][y] > 0
|| field[x - 1][y + 1] > 0 || field[x][y - 1] > 0
|| field[x][y + 1] > 0 || field[x + 1][y - 1] > 0
|| field[x + 1][y] > 0 || field[x + 1][y + 1] > 0);
else do {
x = random(WIDTH);
y = random(HEIGHT);
} while (field[x][y] != EMPTY);
if (safe > 0) safe--;
break;
case 'z': case 'Z': case 26:
if (zaps > 0) {
zaps--;
for (int i = x - 1; i <= x + 1; i++)
for (int j = y - 1; j <= y + 1; j++) {
if (field[i][j] > 0) {
robotx[field[i][j]] = -1;
field[i][j] = RUBBLE;
robots--;
score += level;
}
}
break;
}
default: return;
}
if (field[x][y] == RUBBLE) return;
field[this.x][this.y] = EMPTY;
this.x = x;
this.y = y;
if (field[x][y] > 0) field[x][y] = DEAD;
else {
field[x][y] = PLAYER;
for (int i = 1; i < robotx.length; i++)
if (robotx[i] >= 0) field[robotx[i]][roboty[i]] = EMPTY;
for (int i = 1; i < robotx.length; i++) {
if (robotx[i] >= 0) {
if (robotx[i] > x) robotx[i]--;
else if (robotx[i] < x) robotx[i]++;
if (roboty[i] > y) roboty[i]--;
else if (roboty[i] < y) roboty[i]++;
switch (field[robotx[i]][roboty[i]]) {
case PLAYER:
field[robotx[i]][roboty[i]] = DEAD;
case DEAD:
break;
case EMPTY:
field[robotx[i]][roboty[i]] = i;
break;
case RUBBLE:
robotx[i] = -1;
robots--;
score += level * (this.key == -1 ? 2 : 3);
break;
default:
robotx[field[robotx[i]][roboty[i]]] = -1;
field[robotx[i]][roboty[i]] = RUBBLE;
robotx[i] = -1;
robots -= 2;
score += level * (this.key == -1 ? 4 : 6);
break;
}
}
}
}
repaint();
return;
}
public synchronized void paint(Graphics g) {
g.setColor(getBackground());
g.draw3DRect(15, 15, WIDTH * 16 + 1, HEIGHT * 16 + 1, false);
g.draw3DRect(14, 14, WIDTH * 16 + 3, HEIGHT * 16 + 3, false);
for (int i = 1; i <= WIDTH; i++)
for (int j = 1; j <= HEIGHT; j++) {
if (field[i][j] != EMPTY) {
g.translate(i * 16, j * 16);
switch (field[i][j]) {
case EMPTY: continue;
case RUBBLE: g.setColor(Color.green); break;
case PLAYER: g.setColor(Color.yellow); break;
case DEAD: g.setColor(Color.red); break;
default: g.setColor(Color.cyan); break;
}
g.fillOval(0, 0, 15, 15);
g.setColor(Color.black);
g.drawOval(0, 0, 15, 15);
switch (field[i][j]) {
case RUBBLE: case DEAD:
g.fillRect(5, 5, 2, 2);
g.fillRect(9, 5, 2, 2);
g.drawLine(5, 12, 7, 10);
g.drawLine(8, 10, 10, 12);
break;
case PLAYER:
if (robots == 0) {
g.fillRect(4, 5, 4, 2);
g.fillRect(5, 4, 2, 4);
g.fillRect(8, 5, 4, 2);
g.fillRect(9, 4, 2, 4);
g.drawLine(4, 4, 0, 8);
g.drawLine(11, 4, 15, 8);
g.drawLine(5, 10, 7, 12);
g.drawLine(8, 12, 10, 10);
} else {
g.fillRect(5, 5, 2, 2);
g.fillRect(9, 5, 2, 2);
g.drawLine(5, 10, 7, 12);
g.drawLine(8, 12, 10, 10);
}
break;
default:
g.fillRect(5, 5, 2, 2);
g.fillRect(9, 5, 2, 2);
g.drawLine(5, 11, 10, 11);
break;
}
g.translate(i * -16, j * -16);
}
}
g.drawString("Level:" + level + " Score:" + score + " Meanies:" + robots + " Zaps:" + zaps + " Teleports: " + safe, 16, (HEIGHT + 2) * 16 - 2);
notifyAll();
}
public synchronized void run() {
try {
for (;;) {
wait();
if (key != -1) move();
}
} finally {
return;
}
}
}

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