int GAME_START = 0, GAME_RUN = 1, LEVEL_UP = 2, GAME_OVER = 3;
int state = GAME_START, level, score, levelUpTimer;
ArrayList<Enemy> enemies = new ArrayList<Enemy>();
ArrayList<EnemyBullet> ebullets = new ArrayList<EnemyBullet>();
ArrayList<ShipBullet> mybullets = new ArrayList<ShipBullet>();
ArrayList<Shield> shields = new ArrayList<Shield>();
Ship ship = new Ship();
float minX = 1e9, maxX = -1e9; //min positions of the enemies
class ShipBullet extends Bullet {
ShipBullet() {
x = ship.x;
y = ship.y;
d = 2;
}
void move() {
y -= 5;
}
void display() {
ellipse(x, y, d, d);
}
}
class Ship {
float maxHealth = 100, health = 0;
float x, y;
Ship() {
y = height - 40;
health= maxHealth;
}
boolean collide(Bullet b) {
if(dist(x,y,b.x,b.y) < (20 + b.d)/2) {
health -= 10;
return true;
}
return false;
}
void fire() {
if (frameCount % 10 == 0) mybullets.add(new ShipBullet());
}
void move() {
x = mouseX;
y = height - 40;
}
void display() {
float w = 40;
pushMatrix();
translate(x, y);
triangle(0, -10, 20, 10, -20, 10);
popMatrix();
pushMatrix();
translate(x + - 20, y + 10);
rectMode(CORNER);
float percentHealth =(health/maxHealth);
fill(255- percentHealth*255,percentHealth*255,0);
rect(0,0,w*percentHealth,2);
popMatrix();
}
}
class Bullet {
float x, y, d;
boolean offScreen() {
return x < 0 || y < 0 || x > width || y > width;
}
}
class ShieldSection {
float x, y, d = 3;
ShieldSection(float sx, float sy, int r, int c, int rows, int cols) {
float h = 3, w = 3;
y = sy + (r - (rows/2))*h;
x = sx + (c - (cols/2))*w;
}
boolean collide(Bullet b) {
return dist(b.x, b.y, x, y) < (d + b.d)/2;
}
void display() {
ellipse(x, y, d, d);
}
}
class Shield {
float x, y;
float sideMargin = 100;
ArrayList<ShieldSection> sections = new ArrayList<ShieldSection>();
Shield(int index, int total) {
float between = (width - sideMargin * 2)/(total-1);
x = index * between + sideMargin;
y = height - 70;
int rows = 8, cols = 12;
for (int r = 0; r < rows; r++) {
for (int c = 0; c < cols; c++) {
sections.add(new ShieldSection(x, y, r, c, rows, cols));
}
}
}
boolean collide(Bullet b) {
for (int i = 0; i < sections.size (); i++) {
ShieldSection section = sections.get(i);
if (section.collide(b)) {
sections.remove(i);
return true;
}
}
return false;
}
void display() {
for (int i = 0; i < sections.size (); i++) {
ShieldSection section = sections.get(i);
section.display();
}
}
}
class EnemyBullet extends Bullet {
EnemyBullet(Enemy e) {
x = e.x;
y = e.y;
d = 3;
}
void move() {
y += 5;
}
void display() {
noStroke();
ellipse(x, y, d, d);
}
}
class Enemy {
float x, y, d = 20;
int frameStart;
Enemy(int r, int c) {
y = r * 35 + 60;
x = c * 60 + 60;
minX = min(minX, x);
maxX = max(maxX, x);
frameStart = frameCount;
}
boolean collide(Bullet b) {
return dist(x, y, b.x, b.y) < (d+b.d)/2;
}
void fire() {
if (random(0, 1) < 0.001 + 0.002 * level) {
ebullets.add(new EnemyBullet(this));
}
}
void move() {
float speed = level * 0.5;
float leftMargin = minX;
float rightMarginBegin = width - maxX;
float range = rightMarginBegin - leftMargin;
int framesLeftRight = round(range / speed);
int delayFrames = 60 / level;
int f = frameCount - frameStart;
int firstJump = framesLeftRight+delayFrames;
int secondMove = firstJump + delayFrames;
int secondJump = secondMove + framesLeftRight + delayFrames;
int sum = secondJump + delayFrames;
int[][] ranges = {
{
0, framesLeftRight
}
,
{
firstJump, firstJump
}
,
{
secondMove, secondMove+framesLeftRight
}
,
{
secondJump, secondJump
}
};
if (f % sum >= ranges[0][0] && f % sum <= ranges[0][1]) x+=speed;
if (f % sum >= ranges[1][0] && f % sum <= ranges[1][1]) y+=30;
if (f % sum >= ranges[2][0] && f % sum <= ranges[2][1]) x-=speed;
if (f % sum >= ranges[3][0] && f % sum <= ranges[3][1]) y+=30;
}
void display() {
if (frameCount % 40 < 20) {
ellipse(x, y, d, d);
} else {
rectMode(CENTER);
rect(x, y, d, d);
}
}
}
void setup() {
size(600, 600);
}
void draw() {
if (state == GAME_START) {
background(0);
fill(255);
textAlign(CENTER);
text("Click to begin and fire", width/2, height/2);
if (mousePressed) {
startGame(1);
}
} else if (state == GAME_RUN) {
runGame();
if(enemies.size() == 0) {
state = LEVEL_UP;
levelUpTimer = frameCount + 30;
}
} else if (state == LEVEL_UP) {
background(0);
fill(255);
textAlign(CENTER);
text("New level: "+(level+1), width/2, height/2);
if(frameCount - levelUpTimer > 0) {
startGame(level+1);
}
} else if (state == GAME_OVER) {
background(0);
fill(255);
textAlign(CENTER);
text("Game over! Your score: "+score, width/2, height/2);
text("Press a key to restart", width/2, height/4*3);
if (keyPressed) {
startGame(1);
}
}
}
void startGame(int lev) {
state = GAME_RUN;
level = lev;
enemies.clear();
shields.clear();
mybullets.clear();
ebullets.clear();
ship = new Ship();
for (int r = 0; r < 6; r++) {
for (int c = 0; c < 6; c++) {
enemies.add(new Enemy(r, c));
}
}
for (int i = 0; i < 4; i++) {
shields.add(new Shield(i, 4));
}
if(level == 1) score = 0;
}
void runGame() {
background(0);
stroke(50);
line(0,height - 100,width,height-100);
for (int i = 0; i < enemies.size (); i++) {
Enemy enemy = enemies.get(i);
enemy.display();
enemy.move();
enemy.fire();
}
for (int i = 0; i < shields.size (); i++) {
Shield shield = shields.get(i);
shield.display();
}
for (int i = 0; i < ebullets.size (); i++) {
EnemyBullet ebullet = ebullets.get(i);
ebullet.display();
ebullet.move();
if (ebullet.offScreen()) {
ebullets.remove(i--);
continue;
}
if(ship.collide(ebullet)) {
ebullets.remove(i--);
continue;
}
for (int j = 0; j < shields.size (); j++) {
Shield shield = shields.get(j);
if (shield.collide(ebullet)) {
ebullets.remove(i--);
break;
}
}
}
if (mousePressed) {
ship.fire();
}
for (int i = 0; i < mybullets.size (); i++) {
ShipBullet b = mybullets.get(i);
b.move();
b.display();
if (b.offScreen()) {
mybullets.remove(i--);
continue;
}
for (int j = 0; j < shields.size (); j++) {
Shield shield = shields.get(j);
if (shield.collide(b)) {
mybullets.remove(i--);
break;
}
}
}
for (int i = 0; i < enemies.size (); i++) {
Enemy enemy = enemies.get(i);
if(enemy.y + enemy.d >= height-100) {
state = GAME_OVER;
}
for (int j = 0; j < mybullets.size (); j++) {
ShipBullet b = mybullets.get(j);
if (enemy.collide(b)) {
mybullets.remove(j);
enemies.remove(i--);
score += 10;
break;
}
}
}
ship.move();
ship.display();
fill(255);
text("Level: "+level, width-50, 20);
text("Score: "+score, 40, 20);
}
void keyPressed() {
if(key == 'z') enemies.clear(); //z to cheat
}
