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import * as constants from '/static/games/rms/constants.js';
export class Gates {
constructor() {
this.x = 200;
this.y = 40;
this.v_x = 0;
this.v_y = 0;
this.a_x = 0;
this.a_y = 0;
this.target_x = 200;
this.target_y = 40;
this.health = 1;
}
radius() {
return 30;
}
choose_position() {
const [x, y] = random_position();
this.target_x = x;
this.target_y = y;
}
act(count) {
const max_accel = (1 - this.health) * 0.75 + 0.25;
const max_velocity = (1 - this.health) * 5 + 5;
let dx = this.target_x - this.x;
let dy = this.target_y - this.y;
/* If we've arrived (close and stopped) */
if (Math.sqrt(dx * dx + dy * dy) < max_velocity / max_accel && Math.sqrt(this.v_x * this.v_x + this.v_y * this.v_y) < 0.01) {
/* Then pick a new target */
this.choose_position();
}
dx = this.target_x - this.x;
dy = this.target_y - this.y;
/* if we're close */
if (Math.sqrt(dx * dx + dy * dy) < max_velocity / max_accel) {
/* Then slow down */
const [x, y] = shorten(-this.v_x, -this.v_y, max_accel);
this.a_x = x;
this.a_y = y;
} else {
/* Otherwise, speed up */
const [x, y] = shorten(dx, dy, max_accel);
this.a_x = x;
this.a_y = y;
}
/* If we're going too fast */
if (Math.sqrt(this.v_x * this.v_x + this.v_y * this.v_y) > max_velocity) {
/* Then don't go faster */
if (Math.sign(this.v_x) == Math.sign(this.a_x)) {
this.a_x = 0;
}
if (Math.sign(this.v_y) == Math.sign(this.a_y)) {
this.a_y = 0;
}
}
this.v_x += this.a_x;
this.x += this.v_x;
this.v_y += this.a_y;
this.y += this.v_y;
if (count % 20 === 0) {
let num_bullets;
if (this.health >= 0.8) {
num_bullets = 5;
} else if (this.health >= 0.7) {
num_bullets = 6;
} else if (this.health >= 0.5) {
num_bullets = 7;
} else if (this.health >= 0.4) {
num_bullets = 8;
} else if (this.health >= 0.3) {
num_bullets = 9;
} else if (this.health >= 0.2) {
num_bullets = 10;
} else {
num_bullets = 11;
}
const result = [];
for (let i = 0; i < num_bullets; i++) {
result.push(random_bullet(this));
}
return result;
} else {
return [];
}
}
injure(damage) {
this.health -= damage;
}
center() {
return [16, 23];
}
}
export class GatesBullet {
constructor(x, d_x, y, d_y) {
this.x = x;
this.y = y;
this.d_x = d_x;
this.d_y = d_y;
}
radius() {
return 10;
}
center() {
return [20, 20];
}
}
function random_position() {
return [
Math.random() * (constants.x_dim - 200) + 100,
Math.random() * 100,
];
}
function random_bullet(enemy) {
const multiplier = 2 + 3 * (1 - enemy.health);
const theta = Math.random() * 2 * Math.PI / 3 + Math.PI / 6;
const dx = Math.cos(theta) * multiplier;
const dy = Math.sin(theta) * multiplier;
return new GatesBullet(enemy.x, dx, enemy.y, dy);
}
function shorten(x, y, maxlen) {
const len = Math.sqrt(x * x + y * y);
if (len > maxlen) {
return [x / len / 2, y / len / 2];
} else {
return [x, y];
}
}
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