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GameSpaceInvaders.java
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GameSpaceInvaders.java
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/**
* Java. Game Space Invaders
*
* @author Sergey Iryupin
* @version 0.3.9 dated September 17, 2016
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import javax.sound.sampled.*;
import java.io.*;
class GameSpaceInvaders extends JFrame {
final String TITLE_OF_PROGRAM = "Space Invaders";
final int POINT_SCALE = 2;
final int FIELD_WIDTH = 224*POINT_SCALE;
final int FIELD_HEIGHT = 256*POINT_SCALE;
final int START_LOCATION = 150;
final int FIELD_DX = 7; // determined experimentally
final int FIELD_DY = 26;
final int STEP_X = 5; // wave step left-right
final int STEP_Y = 15; // wave step down
final int GROUND_Y = FIELD_HEIGHT - 20;
final int LEFT = 37; // key codes
final int RIGHT = 39;
final int DOWN = 40;
final int FIRE = 32;
final int SHOW_DELAY = 20; // delay for animation
final int[][][][] PATTERN_OF_ALIENS = {
{{{0,0,0,0,1,1,1,1,0,0,0,0}, {0,1,1,1,1,1,1,1,1,1,1,0}, {1,1,1,1,1,1,1,1,1,1,1,1}, // alien 1/1
{1,1,1,0,0,1,1,0,0,1,1,1}, {1,1,1,1,1,1,1,1,1,1,1,1}, {0,0,1,1,1,0,0,1,1,1,0,0},
{0,1,1,0,0,1,1,0,0,1,1,0}, {0,0,1,1,0,0,0,0,1,1,0,0}, {12}},
{{0,0,0,0,1,1,1,1,0,0,0,0}, {0,1,1,1,1,1,1,1,1,1,1,0}, {1,1,1,1,1,1,1,1,1,1,1,1}, // alien 1/2
{1,1,1,0,0,1,1,0,0,1,1,1}, {1,1,1,1,1,1,1,1,1,1,1,1}, {0,0,0,1,1,0,0,1,1,0,0,0},
{0,0,1,1,0,1,1,0,1,1,0,0}, {1,1,0,0,0,0,0,0,0,0,1,1}}},
{{{0,0,1,0,0,0,0,0,1,0,0,0}, {0,0,0,1,0,0,0,1,0,0,0,0}, {0,0,1,1,1,1,1,1,1,0,0,0}, // alien 2/1
{0,1,1,0,1,1,1,0,1,1,0,0}, {1,1,1,1,1,1,1,1,1,1,1,0}, {1,0,1,1,1,1,1,1,1,0,1,0},
{1,0,1,0,0,0,0,0,1,0,1,0}, {0,0,0,1,1,0,1,1,0,0,0,0}, {11}},
{{0,0,1,0,0,0,0,0,1,0,0,0}, {1,0,0,1,0,0,0,1,0,0,1,0}, {1,0,1,1,1,1,1,1,1,0,1,0}, // alien 2/2
{1,1,1,0,1,1,1,0,1,1,1,0}, {1,1,1,1,1,1,1,1,1,1,1,0}, {0,1,1,1,1,1,1,1,1,1,0,0},
{0,0,1,0,0,0,0,0,1,0,0,0}, {0,1,0,0,0,0,0,0,0,1,0,0}}},
{{{0,0,0,1,1,0,0,0,0,0,0,0}, {0,0,1,1,1,1,0,0,0,0,0,0}, {0,1,1,1,1,1,1,0,0,0,0,0}, // alien 3/1
{1,1,0,1,1,0,1,1,0,0,0,0}, {1,1,1,1,1,1,1,1,0,0,0,0}, {0,0,1,0,0,1,0,0,0,0,0,0},
{0,1,0,1,1,0,1,0,0,0,0,0}, {1,0,1,0,0,1,0,1,0,0,0,0}, {8}},
{{0,0,0,1,1,0,0,0,0,0,0,0}, {0,0,1,1,1,1,0,0,0,0,0,0}, {0,1,1,1,1,1,1,0,0,0,0,0}, // alien 3/2
{1,1,0,1,1,0,1,1,0,0,0,0}, {1,1,1,1,1,1,1,1,0,0,0,0}, {0,1,0,1,1,0,1,0,0,0,0,0},
{1,0,0,0,0,0,0,1,0,0,0,0}, {0,1,0,0,0,0,1,0,0,0,0,0}}}
};
final int MAX_ALIEN_RAYS = 2;
Canvas canvas = new Canvas();
Cannon cannon = new Cannon();
BangCannon bang = new BangCannon();
Ray ray = new Ray();
Wave wave = new Wave();
FlashAlien flash = new FlashAlien();
AlienRays rays = new AlienRays();
Random random = new Random();
int countScore, countLives = 3;
boolean gameOver;
public static void main(String[] args) {
new GameSpaceInvaders().go();
}
GameSpaceInvaders() {
setTitle(TITLE_OF_PROGRAM);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setBounds(START_LOCATION, START_LOCATION, FIELD_WIDTH + FIELD_DX, FIELD_HEIGHT + FIELD_DY);
setResizable(false);
canvas.setBackground(Color.black);
add(BorderLayout.CENTER, canvas);
addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if ((e.getKeyCode() == LEFT) || (e.getKeyCode() == RIGHT))
cannon.setDirection(e.getKeyCode());
if (e.getKeyCode() == FIRE)
cannon.shot();
}
public void keyReleased(KeyEvent e) {
if ((e.getKeyCode() == LEFT) || (e.getKeyCode() == RIGHT))
cannon.setDirection(0);
}
});
setVisible(true);
}
void go() { // main loop of game
while (true) {
try {
Thread.sleep(SHOW_DELAY);
} catch (Exception e) { e.printStackTrace(); }
canvas.repaint();
cannon.move();
flash.show();
bang.show();
ray.fly();
rays.fly();
wave.nextStep();
if (wave.isDestroyed()) { // if the wave completely destroyed
wave = new Wave();
countLives++;
}
}
}
class Cannon { // laser cannon
final int WIDTH = 26;
final int HEIGHT = 16;
final int DX = 5;
int x, y, direction;
public Cannon() {
x = 10;
y = FIELD_HEIGHT - HEIGHT - 30;
}
void move() {
if (direction == LEFT && x > 10) x -= DX;
if (direction == RIGHT && x < FIELD_WIDTH - WIDTH - 12) x += DX;
}
void setDirection(int direction) { this.direction = direction; }
void shot() {
playSound(new File("sounds/shoot.wav"));
ray.start(x, y);
}
int getX() { return x; }
int getY() { return y; }
int getWidth() { return WIDTH; }
void paint(Graphics g) {
if (!bang.isBang()) {
g.fillRect(x, y + HEIGHT/2, WIDTH, HEIGHT/2);
g.fillRect(x + 2, y + HEIGHT/2 - 2, WIDTH - 4, HEIGHT/2);
g.fillRect(x + 10, y + 2, WIDTH - 20, HEIGHT/2);
g.fillRect(x + 12, y, 2, 2);
}
}
}
class Ray { // from laser cannon
final int WIDTH = 2;
final int HEIGHT = 8;
final int DY = 12;
int x, y;
boolean exists;
void start(int x, int y) {
if (!exists) {
exists = true;
this.x = x + (cannon.getWidth() - WIDTH) / 2;
this.y = y - HEIGHT;
}
}
void fly() {
if (exists) {
y -= DY;
exists = (y + DY) > 0;
}
}
void disable() { exists = false; }
boolean isEnable() { return exists; }
int getX() { return x; }
int getY() { return y; }
void paint(Graphics g) {
if (exists) g.fillRect(x, y, WIDTH, HEIGHT);
}
}
class AlienRay { // from one alien
final int width = 6;
final int height = 10;
final int dy = 6; // define speed of ray
int x, y;
AlienRay(int x, int y) {
this.x = x;
this.y = y;
}
void fly() { y += dy; }
boolean hitGround() { return y + height > GROUND_Y; }
boolean hitCannon() {
if (y + height > cannon.getY())
if (x >= cannon.getX() && x <= cannon.getX() + cannon.getWidth())
return true;
return false;
}
void paint(Graphics g) {
g.setColor(Color.white);
g.fillRect(x + 2, y, 2, height);
g.fillRect(x, y + height - 4, width, 2);
}
}
class AlienRays { // a few rays from alien
ArrayList<AlienRay> rays = new ArrayList<AlienRay>();
void add(int x, int y) {
rays.add(new AlienRay(x, y));
}
void fly() {
for (AlienRay ray : rays) ray.fly();
for (AlienRay ray : rays) // check hit ground
if (ray.hitGround()) {
rays.remove(ray);
break;
}
for (AlienRay ray : rays) // check hit cannon
if (ray.hitCannon()) {
playSound(new File("sounds/explosion.wav"));
bang.enable();
countLives--;
cannon = new Cannon();
gameOver = countLives == 0;
rays.remove(ray);
break;
}
}
int getSize() { return rays.size(); }
void paint(Graphics g) {
for (AlienRay ray : rays) ray.paint(g);
}
}
class Alien { // for attacking wave
int x, y, type, view = 0;
int width, height = 8;
Alien(int x, int y, int type) {
this.x = x;
this.y = y;
this.type = type;
width = PATTERN_OF_ALIENS[type][view][8][0];
}
int getType() { return type; }
boolean isHitRay() {
if (ray.isEnable())
if ((ray.getX() >= x) && (ray.getX() <= x + width*POINT_SCALE))
if (ray.getY() < y + height*POINT_SCALE) {
ray.disable();
return true;
}
return false;
}
void nextStep(int direction) {
view = 1 - view; // change view each step
if (direction == RIGHT) x += STEP_X;
else if (direction == LEFT) x -= STEP_X;
else if (direction == DOWN) y += STEP_Y;
}
void bang() { flash.enable(x, y - 2); }
void shot() { rays.add(x + width/2, y + height); }
void paint(Graphics g) {
g.setColor(Color.white);
for (int col = 0; col < width; col++)
for (int row = 0; row < height; row++)
if (PATTERN_OF_ALIENS[type][view][row][col] == 1)
g.fillRect(col*POINT_SCALE + x, row*POINT_SCALE + y, POINT_SCALE, POINT_SCALE);
}
}
class Wave { // attacking wave of aliens
final int[][] PATTERN = {
{2,2,2,2,2,2,2,2,2,2,2}, {1,1,1,1,1,1,1,1,1,1,1}, {1,1,1,1,1,1,1,1,1,1,1}, {0,0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0}};
volatile ArrayList<Alien> wave = new ArrayList<Alien>();
int numFrames = 30; // define the speed of the wave
int countFrames = 0;
int direction = RIGHT;
boolean stepDown = false;
int startX = 50;
int startY = 60;
Wave() {
for (int y = 0; y < PATTERN.length; y++)
for (int x = 0; x < PATTERN[y].length; x++)
wave.add(new Alien(startX + x*POINT_SCALE*16 + PATTERN[y][x]*POINT_SCALE, startY + y*POINT_SCALE*16, PATTERN[y][x]));
}
void nextStep() {
if (countFrames == numFrames) {
if ((startX == 10) || (startX == 17*STEP_X + 10)) { // time to change direction
if (!stepDown) {
direction = DOWN;
} else {
direction = (startX == 10)? RIGHT : LEFT;
stepDown = false;
}
}
for (Alien alien : wave) { // wave moves and shots
alien.nextStep(direction);
if (random.nextInt(10) == 9)
if (rays.getSize() < MAX_ALIEN_RAYS)
alien.shot();
}
if (direction == DOWN) {
startY += STEP_Y;
stepDown = true;
} else {
startX += (direction == RIGHT)? STEP_X : -STEP_X;
}
countFrames = 0;
} else { countFrames++; }
for (Alien alien : wave) // check hit alien
if (alien.isHitRay()) {
countScore += (alien.getType() + 1) * 10;
playSound(new File("sounds/invaderkilled.wav"));
alien.bang();
wave.remove(alien);
numFrames = 10 + (int)(20f/55f * wave.size()); // increase wave's speed
if (countFrames > numFrames) countFrames = numFrames; // correct countFrames
System.out.println(numFrames + ":" + countFrames);
break;
}
}
boolean isDestroyed() { return wave.size() == 0; }
void paint(Graphics g) {
for (Alien alien : wave) alien.paint(g);
}
}
class FlashAlien { // flash when the alien explodes
final int[][] BANG = {
{0,0,0,0,0,1,0,0,0,0,0,0}, {0,1,0,0,0,1,0,0,1,0,0,0}, {0,0,1,0,0,0,0,0,1,0,0,1}, {0,0,0,1,0,0,0,1,0,0,1,0}, {1,1,0,0,0,0,0,0,0,0,0,0},
{0,0,0,0,0,0,0,0,0,0,1,1}, {0,1,0,0,1,0,0,0,1,0,0,0}, {1,0,0,1,0,0,0,0,0,1,0,0}, {0,0,0,1,0,0,1,0,0,0,1,0}, {0,0,0,0,0,0,1,0,0,0,0,0}
};
int x, y, counter;
void enable(int x, int y) {
this.x = x;
this.y = y;
counter = 5; // the show time in the animation cycles
}
void show() { if (counter > 0) counter--; }
void paint(Graphics g) {
if (counter > 0)
for (int i = 0; i < BANG.length; i++)
for (int j = 0; j < BANG[i].length; j++)
if (BANG[i][j] == 1) g.fillRect(j*POINT_SCALE + x, i*POINT_SCALE + y, POINT_SCALE, POINT_SCALE);
}
}
class BangCannon { // fire when hit the cannon
final int[][][] FIRE = {
{{0,0,0,0,1,0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {0,0,1,0,0,0,0,1,0,0,1,0,0,0,0}, {0,0,0,0,1,0,1,0,0,1,0,1,0,0,0}, {0,0,1,0,0,0,0,0,0,0,0,0,1,0,0},
{0,0,0,0,0,1,0,1,1,0,0,0,0,0,0}, {1,0,0,1,1,1,1,1,1,1,1,0,0,0,0}, {0,0,1,1,1,1,1,1,1,1,1,1,0,0,0}, {1,1,1,1,1,1,1,1,1,1,1,1,1,0,0}},
{{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {1,0,0,0,0,0,1,0,0,0,0,0,1,0,0}, {0,0,0,1,0,0,0,0,0,0,0,0,0,0,0}, {0,1,0,0,0,0,1,0,0,0,0,0,1,0,0}, {0,0,0,0,0,1,0,0,0,0,1,0,0,0,1},
{1,0,0,0,1,1,0,0,1,0,0,0,0,0,0}, {0,0,0,1,1,1,1,1,1,1,0,0,1,0,0}, {0,0,1,1,1,1,1,1,1,1,1,0,0,0,0}, {1,1,1,1,1,1,1,1,1,1,1,1,1,0,0}},
};
int x, y, countCycles, timeOfCycle, view;
final int TIME_OF_CYCLE = 3;
void enable() {
this.x = cannon.getX() - 1;
this.y = cannon.getY() - 1;
countCycles = 5;
timeOfCycle = TIME_OF_CYCLE;
view = 0;
}
void show() {
if (timeOfCycle == 0) {
timeOfCycle = TIME_OF_CYCLE;
view = 1 - view;
if (countCycles > 0 && !gameOver) countCycles--;
} else
timeOfCycle--;
}
boolean isBang() { return countCycles != 0; }
void paint(Graphics g) {
if (countCycles > 0)
for (int i = 0; i < FIRE[view].length; i++)
for (int j = 0; j < FIRE[view][i].length; j++)
if (FIRE[view][i][j] == 1) g.fillRect(j*POINT_SCALE + x, i*POINT_SCALE + y, POINT_SCALE, POINT_SCALE);
}
}
void paintTextAndLine(Graphics g) { // paint score, lives and green line
final int[][] SCORE = {
{1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1},
{1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0},
{1,1,1,1,1,1,0,1,0,0,0,0,0,0,1,0,0,0,0,1,0,1,0,0,0,0,0,0,1,1,1,1,1,1},
{0,0,0,0,0,1,0,1,0,0,0,0,0,0,1,0,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0},
{1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,0,0,0,0,0,0,1,1,1,1,1,1}
};
final int[][] LIVES = {
{1,0,0,0,0,0,0,1,0,1,0,0,0,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1},
{1,0,0,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0},
{1,0,0,0,0,0,0,1,0,0,1,0,1,0,0,1,1,1,1,1,1,0,1,1,1,1,1,1},
{1,0,0,0,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
{1,1,1,1,1,1,0,1,0,0,0,1,0,0,0,1,1,1,1,1,1,0,1,1,1,1,1,1}
};
final int[][] GAME_OVER = {
{1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,0,0,0,0,0,1,1,1,1,1,1,0,1,0,0,0,1,0,1,1,1,1,1,1,0,1,1,1,1,1,1},
{1,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0},
{1,0,0,0,0,1,0,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,1,1,1,1,1,1,0,0,0,0,0,1,0,0,0,0,1,0,0,1,0,1,0,0,1,1,1,1,1,1,0,1,0,0,0,0,0},
{1,0,0,0,0,1,0,1,0,0,0,0,1,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,1,0,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0},
{1,1,1,1,1,1,0,1,1,1,1,1,1,0,1,0,0,1,0,0,1,0,1,1,1,1,1,1,0,0,0,0,0,1,1,1,1,1,1,0,0,0,1,0,0,0,1,1,1,1,1,1,0,1,0,0,0,0,0},
{0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
{1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},
};
g.setColor(Color.white);
for (int y = 0; y < SCORE.length; y++) {
for (int x = 0; x < SCORE[y].length; x++)
if (SCORE[y][x] == 1) g.fillRect(x*POINT_SCALE + 30, y*POINT_SCALE + 20, POINT_SCALE, POINT_SCALE);
for (int i = 0; i < LIVES[y].length; i++)
if (LIVES[y][i] == 1) g.fillRect(i*POINT_SCALE + 320, y*POINT_SCALE + 20, POINT_SCALE, POINT_SCALE);
}
if (gameOver)
for (int y = 0; y < GAME_OVER.length; y++)
for (int x = 0; x < GAME_OVER[y].length; x++)
if (GAME_OVER[y][x] == 1) g.fillRect(x*POINT_SCALE + 170, y*POINT_SCALE + 250, POINT_SCALE, POINT_SCALE);
g.setColor(Color.green);
g.fillRect(10, GROUND_Y, FIELD_WIDTH - 20, 2);
}
void paintNumber(Graphics g, int number, int x, int y) { // paint numbers (countScore, countLives)
final int[][][] NUMBERS = {
{{1,1,1,1,1,1}, {1,0,0,0,0,1}, {1,0,0,0,0,1}, {1,0,0,0,0,1}, {1,1,1,1,1,1}}, // 0
{{0,0,0,0,0,1}, {0,0,0,0,0,1}, {0,0,0,0,0,1}, {0,0,0,0,0,1}, {0,0,0,0,0,1}}, // 1
{{1,1,1,1,1,1}, {0,0,0,0,0,1}, {1,1,1,1,1,1}, {1,0,0,0,0,0}, {1,1,1,1,1,1}}, // 2
{{1,1,1,1,1,1}, {0,0,0,0,0,1}, {1,1,1,1,1,1}, {0,0,0,0,0,1}, {1,1,1,1,1,1}}, // 3
{{1,0,0,0,0,1}, {1,0,0,0,0,1}, {1,1,1,1,1,1}, {0,0,0,0,0,1}, {0,0,0,0,0,1}}, // 4
{{1,1,1,1,1,1}, {1,0,0,0,0,0}, {1,1,1,1,1,1}, {0,0,0,0,0,1}, {1,1,1,1,1,1}}, // 5
{{1,1,1,1,1,1}, {1,0,0,0,0,0}, {1,1,1,1,1,1}, {1,0,0,0,0,1}, {1,1,1,1,1,1}}, // 6
{{1,1,1,1,1,1}, {0,0,0,0,0,1}, {0,0,0,0,0,1}, {0,0,0,0,0,1}, {0,0,0,0,0,1}}, // 7
{{1,1,1,1,1,1}, {1,0,0,0,0,1}, {1,1,1,1,1,1}, {1,0,0,0,0,1}, {1,1,1,1,1,1}}, // 8
{{1,1,1,1,1,1}, {1,0,0,0,0,1}, {1,1,1,1,1,1}, {0,0,0,0,0,1}, {1,1,1,1,1,1}} // 9
};
String numStr = Integer.toString(number);
g.setColor(Color.green);
for (int p = 0; p < numStr.length(); p++) {
int n = (int) numStr.charAt(p) - 48;
for (int i = 0; i < 5; i++)
for (int j = 0; j < 6; j++)
if (NUMBERS[n][i][j] == 1) g.fillRect(x + j*POINT_SCALE + p*14, y + i*POINT_SCALE, POINT_SCALE, POINT_SCALE);
}
}
void playSound(File f) { // playing a sound
try {
AudioInputStream stream = AudioSystem.getAudioInputStream(f);
Clip clip = AudioSystem.getClip();
clip.open(stream);
clip.setFramePosition(0);
clip.start();
} catch (Exception e) { e.printStackTrace(); }
}
class Canvas extends JPanel { // my canvas for painting
@Override
public void paint(Graphics g) {
super.paint(g);
paintTextAndLine(g);
paintNumber(g, countScore, 110, 20);
paintNumber(g, countLives, 390, 20);
bang.paint(g);
if (!gameOver) {
cannon.paint(g);
ray.paint(g);
wave.paint(g);
flash.paint(g);
rays.paint(g);
}
}
}
}