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let scene = 0;let player = { x: 200, y: 200, r: 20, angle: 0, dead: false, fillColor: "red", show: function () { noStroke(); push(); translate(this.x, this.y); rotate(PI / 2); rotate(this.angle); fill(this.fillColor); triangle(0, -this.r / 2, -this.r / 2, this.r / 2, this.r / 2, this.r / 2); pop(); }, moveTo: function (x, y, speed) { this.angle = atan2(y - this.y, x - this.x); // move player if (dist(this.x, this.y, x, y) > 5) { this.x += speed * cos(this.angle); this.y += speed * sin(this.angle); } }, checkHit: function () { for (let obstacle of obstacles) { if ( dist(this.x, this.y, obstacle.x, obstacle.y) < obstacle.r + player.r / 2 ) { return true; } } return false; }, shoot: function () { let bullet = { x: this.x, y: this.y, speed: 4, fillColor: color(255), angle: this.angle, show: function () { stroke(this.fillColor); strokeWeight(3); line( this.x, this.y, 2 * this.speed * cos(this.angle) + this.x, 2 * this.speed * sin(this.angle) + this.y ); strokeWeight(1); stroke(0); }, update: function () { this.x += this.speed * cos(this.angle); this.y += this.speed * sin(this.angle); this.checkHit(); if (this.x < 0 || this.x > width || this.y < 0 || this.y > height) { bullets.splice(bullet, 1); } }, checkHit: function () { for (let i = obstacles.length - 1; i > -1; i--) { if ( obstacles[i].pointInside( 2 * this.speed * cos(this.angle) + this.x, 2 * this.speed * sin(this.angle) + this.y ) ) { makeParticles(15, this.x, this.y, 15, 30); obstacles[i].health -= 20; bullets.splice(this, 1); } } }, }; bullets.push(bullet); }, bomb: function () { let bomb = { x: this.x, y: this.y, r: 15, lifespan: 30, age: 0, speed: 4, fillColor: color(0), angle: this.angle, show: function () { fill(this.fillColor); circle(this.x, this.y, this.r); strokeWeight(1); stroke(0); }, update: function () { this.x += this.speed * cos(this.angle); this.y += this.speed * sin(this.angle); this.checkHit(); if (this.x < 0 || this.x > width || this.y < 0 || this.y > height) { bombs.splice(bomb, 1); } this.age++; }, checkHit: function () { for (let i = obstacles.length - 1; i > -1; i--) { if ( dist(this.x, this.y, obstacles[i].x, obstacles[i].y) < obstacles[i].r + this.r ) { this.explode(); obstacles[i].health -= 50; } } if (this.age >= this.lifespan) { this.explode(); } }, explode: function () { makeParticles(25, this.x, this.y, 30, 40); for (let i = obstacles.length - 1; i > -1; i--) { if ( dist(obstacles[i].x, obstacles[i].y, this.x, this.y) < 2 * (obstacles[i].r + this.r) ) { obstacles[i].health -= 30; } } bombs.splice(this, 1); }, }; bombs.push(bomb); }, checkEdges: function () { if (this.x < this.r / 2) { this.x = this.r / 2; } else if (this.x > width - this.r / 2) { this.x = width - this.r / 2; } if (this.y < this.r / 2) { this.y = this.r / 2; } else if (this.y > height - this.r / 2) { this.y = height - this.r / 2; } },};let obstacles = [];let bullets = [];let bombs = [];function setup() { createCanvas(400, 400); for (let i = 0; i < 20; i++) { createObstacle(random(width), random(height / 6), random(10, 20)); }}function draw() { background(51); if (scene == 0) { startScreen(); } else if (scene == 1) { playGame(); } else if (scene == 2) { loseScreen(); } else if (scene == 3) { winScreen(); }}function startScreen() { background(0); textAlign(CENTER); fill(255); textSize(30); text("ASTEROIDS", width / 2, height / 2); if ( mouseX > width / 4 && mouseX < (3 * width) / 4 && mouseY > (3 * height) / 5 && mouseY < (4 * height) / 5 ) { fill(60, 215, 60); } else { fill(100, 255, 100); } rect(width / 4, (3 * height) / 5, width / 2, height / 5, width / 30); fill(0); textAlign(CENTER, CENTER); text("Play", width / 2, (3 * height) / 5 + height / 10); if ( mouseX > width / 4 && mouseX < (3 * width) / 2 && mouseY > (3 * height) / 5 && mouseY < (4 * height) / 5 && mouseIsPressed ) { scene = 1; }}function playGame() { if (player.dead) { scene = 2; } for (let i = obstacles.length - 1; i > -1; i--) { if (obstacles[i].dead) { obstacles.splice(i, 1); if (obstacles.length <= 0) { scene = 3; } } } updateAndDrawParticles(); if (obstacles.length > 0) { for (let i = obstacles.length - 1; i > -1; i--) { obstacles[i].show(); obstacles[i].update(); if (obstacles[i]) { obstacles[i].checkEdges(); } } } if (bullets.length > 0) { for (let i = bullets.length - 1; i > -1; i--) { bullets[i].show(); bullets[i].update(); } } if (bombs.length > 0) { for (let i = bombs.length - 1; i > -1; i--) { bombs[i].show(); bombs[i].update(); } } player.checkEdges(); player.show(); player.moveTo(mouseX, mouseY, 2); if (player.checkHit()) { player.fillColor = color(255, 255, 100); player.dead = true; } else { player.fillColor = color(255, 0, 0); } if (shooting) { shotCounter++; if (shotCounter % 10 == 0) { player.shoot(); } }}function loseScreen() { fill(150, 0, 0); textAlign(CENTER); textSize(30); background(255, 0, 0); text("Game Over.", 200, 200);}function winScreen() { fill(0, 150, 0); textAlign(CENTER); textSize(30); background(0, 255, 0); text("You Win!", 200, 200);}function keyPressed() { if (key == " ") { player.shoot(); shooting = true; } else if (key == "w") { player.bomb(); }}function keyReleased() { if (key == " ") { shooting = false; }}let shooting = false;let shotCounter = 0;function mousePressed() { player.shoot(); shooting = true;}function mouseReleased() { shooting = false;}function createObstacle(x, y, r) { let obstacle = { x: x, y: y, r: r, fillColor: similarColorTo(255, 219, 145, 20), velX: random(-3, 3), velY: random(-3, 3), health: (r / 20) * 100, dead: false, show: function () { noStroke(); fill(this.fillColor); circle(this.x, this.y, this.r * 2); }, update: function () { // this.velX += random(-0.3, 0.3); // this.velY += random(-0.3, 0.3); this.velX = constrain(this.velX, -3, 3); this.velY = constrain(this.velY, -3, 3); this.x += this.velX; this.y += this.velY; if (this.health <= 0) { this.dead = true; } }, checkEdges: function () { if (this.x < this.r) { this.x = this.r; this.velX *= -1; } else if (this.x > width - this.r) { this.x = width - this.r; this.velX *= -1; } if (this.y < this.r) { this.y = this.r; this.velY *= -1; } else if (this.y > height - this.r) { this.y = height - this.r; this.velY *= -1; } }, pointInside(x, y) { return dist(x, y, this.x, this.y) < this.r; }, }; obstacles.push(obstacle);}function similarColorTo(r0, g0, b0, jitter) { r = r0 + random(-jitter, jitter); g = g0 + random(-jitter, jitter); b = b0 + random(-jitter, jitter); return color(r, g, b);}