pinball/assets/_Game/Scripts/GamePlay/Enemy.ts

import {
    _decorator,
    CCFloat,
    CCInteger,
    Component,
    geometry,
    math,
    Node,
    Vec3,
    tween,
    Collider2D,
    Sprite,
    Contact2DType,
    AudioClip,
    Tween,
} from 'cc';
import { EventManger } from '../Manager/EventManger';
import GameEvent from '../Events/GameEvent';
import ScoreType from '../Enum/ScoreType';
import GameState from '../Enum/GameState';
import { SoundManager } from '../Manager/SoundManager';
const { ccclass, property } = _decorator;

@ccclass('Enemy')
export class Enemy extends Component {
    @property({ type: Collider2D, visible: true })
    private _collider: Collider2D;
    @property({ type: Sprite, visible: true })
    private _sprite: Sprite;
    @property({ type: Node, visible: true })
    private _patrolPoint1: Node;
    @property({ type: Node, visible: true })
    private _patrolPoint2: Node;
    @property({ type: CCFloat, visible: true })
    private _speed = 100;
    @property({ type: CCInteger, visible: true })
    private _requireGoal = 1;
    @property({ visible: true })
    private _curveY = false;
    @property({ type: geometry.AnimationCurve, visible: true })
    private _patrolCurve: geometry.AnimationCurve = new geometry.AnimationCurve();
    @property({ type: CCFloat, visible: true })
    private _multiplierCurve = 100;

    @property({ type: AudioClip, visible: true })
    private _hitSound: AudioClip;

    private x: number;
    private y: number;
    private _distance: number;
    private _processDistance = 0;
    private _direction = 1;
    private _isActive = false;
    private _currentGoal = 0;

    protected onLoad(): void {
        EventManger.instance.on(GameEvent.Score, this.onScore, this);
        EventManger.instance.on(GameEvent.GameStateChange, this.onGameStateChange, this);

        this._collider.on(Contact2DType.BEGIN_CONTACT, this.onBeginContact, this);
    }

    protected start(): void {
        this.init();
    }

    protected async init() {
        this._collider.node.setWorldPosition(this._patrolPoint1.worldPosition);
        const pos = this._patrolPoint1.getWorldPosition();
        this.x = pos.x;
        this.y = pos.y;
        this._distance = Math.abs(this._patrolPoint2.worldPosition.x - this.x);
        this._direction = this._patrolPoint1.worldPosition.x < this._patrolPoint2.worldPosition.x ? 1 : -1;
        this._processDistance = 0;
        this._currentGoal = 0;
        this._isActive = false;
        this._collider.node.active = false;
    }

    protected update(dt: number): void {
        if (!this._isActive) return;
        if (this._curveY) {
            this._processDistance += this._speed * dt;
            this._processDistance = math.clamp(this._processDistance, 0, this._distance);

            const process = math.clamp01(this._processDistance / this._distance);
            this.x += this._speed * dt * this._direction;
            this.y = this._patrolPoint1.worldPosition.y + this._patrolCurve.evaluate(process) * this._multiplierCurve;
        } else {
            const dir = new Vec3();
            Vec3.subtract(dir, this._patrolPoint2.worldPosition, this._patrolPoint1.worldPosition);
            dir.multiplyScalar(this._direction).normalize();

            this._processDistance += dir.x * this._speed * dt * this._direction;
            this._processDistance = math.clamp(this._processDistance, 0, this._distance);

            this.x += dir.x * this._speed * dt;
            this.y += dir.y * this._speed * dt;
            this.y = math.clamp(this.y, this._patrolPoint1.worldPosition.y, this._patrolPoint2.worldPosition.y);
        }
        this.x = math.clamp(this.x, this._patrolPoint1.worldPosition.x, this._patrolPoint2.worldPosition.x);
        this._collider.node.setWorldPosition(new Vec3(this.x, this.y));
        if (this._processDistance == this._distance) {
            this._direction *= -1;
            this._processDistance = 0;
        }
    }

    private onBeginContact(self: Collider2D, other: Collider2D) {
        SoundManager.instance.playSfx(this._hitSound);
        Tween.stopAllByTarget(this._sprite.node.scale);
        tween(this._sprite.node.scale)
            .set(Vec3.ONE)
            .to(0.1, new Vec3(1.2, 1.2), { easing: 'backInOut' })
            .to(0.5, Vec3.ONE, { easing: 'backOut' })
            .start();
    }

    private onScore(score: number, points: number, type: ScoreType) {
        if (type == ScoreType.Goal) {
            this._currentGoal++;
            if (this._currentGoal == this._requireGoal) {
                this._sprite.node.setScale(Vec3.ZERO);
                this._collider.node.active = true;
                tween(this._sprite.node.scale)
                    .delay(1)
                    .to(0.5, Vec3.ONE, {
                        easing: 'backOut',
                        onComplete: () => {
                            this._isActive = true;
                        },
                    })
                    .start();
            }
        }
    }

    private onGameStateChange(state: GameState) {
        switch (state) {
            case GameState.Init:
                break;
            case GameState.Ready:
                break;
            case GameState.Playing:
                this.init();
                break;
            case GameState.GameOver:
                break;
            case GameState.Relive:
                break;
            case GameState.End:
                break;
        }
    }
}