93 lines
2.5 KiB
JavaScript
93 lines
2.5 KiB
JavaScript
import { BaseEnemy } from './BaseEnemy.js';
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const PREFERRED_DIST = 300;
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const SHOOT_INTERVAL = 2000; // ms
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const PROJECTILE_SPEED = 200;
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const PROJECTILE_DAMAGE = 10;
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const PROJECTILE_COLOR = 0xff00ff;
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export class ShooterEnemy extends BaseEnemy {
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constructor(scene, x, y, player) {
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super(scene, x, y, player, {
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frameOffset: 6,
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radius: 16,
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hp: 60,
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speed: 50,
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xp: 30,
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contactDamage: 8,
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});
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this._shootTimer = SHOOT_INTERVAL * Math.random(); // stagger first shot
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this.projectiles = scene.add.group();
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this._deathPulseColor = 0x9900ff;
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}
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_die() {
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this._gridDeathPulse();
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super._die();
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}
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update(delta) {
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super.update(delta);
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this._strafe();
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this._handleShoot(delta);
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this._updateProjectiles();
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}
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_strafe() {
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const dist = Phaser.Math.Distance.Between(this.x, this.y, this.player.x, this.player.y);
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const angle = Phaser.Math.Angle.Between(this.x, this.y, this.player.x, this.player.y);
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let vx = 0, vy = 0;
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if (dist > PREFERRED_DIST + 30) {
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// Move closer
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vx = Math.cos(angle) * this.speed;
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vy = Math.sin(angle) * this.speed;
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} else if (dist < PREFERRED_DIST - 30) {
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// Move away
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vx = -Math.cos(angle) * this.speed;
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vy = -Math.sin(angle) * this.speed;
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} else {
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// Strafe perpendicular
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const perp = angle + Math.PI / 2;
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vx = Math.cos(perp) * this.speed;
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vy = Math.sin(perp) * this.speed;
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}
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this.sprite.body.setVelocity(vx, vy);
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}
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_handleShoot(delta) {
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this._shootTimer -= delta;
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if (this._shootTimer <= 0) {
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this._shootTimer = SHOOT_INTERVAL;
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this._fireProjectile();
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}
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}
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_fireProjectile() {
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const angle = Phaser.Math.Angle.Between(this.x, this.y, this.player.x, this.player.y);
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const proj = this.scene.add.circle(this.x, this.y, 6, PROJECTILE_COLOR);
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this.scene.physics.add.existing(proj);
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proj.body.setVelocity(
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Math.cos(angle) * PROJECTILE_SPEED,
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Math.sin(angle) * PROJECTILE_SPEED
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);
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proj.damage = PROJECTILE_DAMAGE;
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this.projectiles.add(proj);
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// Register with scene for collision
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this.scene.events.emit('enemy-projectile-spawned', proj);
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}
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_updateProjectiles() {
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const W = this.scene.scale.width;
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const H = this.scene.scale.height;
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this.projectiles.getChildren().forEach(p => {
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if (p.x < -30 || p.x > W + 30 || p.y < -30 || p.y > H + 30) p.destroy();
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});
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}
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destroy() {
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this.projectiles.clear(true, true);
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super.destroy();
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}
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}
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