80 lines
2.5 KiB
TypeScript
80 lines
2.5 KiB
TypeScript
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import { EntitySystem, Entity, Matcher, Time } from '@esengine/ecs-framework';
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import { Transform, Velocity } from '../components';
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/**
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* 随机移动系统
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* 让实体随机改变移动方向
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*/
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export class RandomMovementSystem extends EntitySystem {
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/** 每个实体的下次方向改变时间 */
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private nextDirectionChangeTime: Map<number, number> = new Map();
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constructor() {
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// 处理具有Transform和Velocity组件的实体
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super(Matcher.empty().all(Transform, Velocity));
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}
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/**
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* 处理所有实体
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*/
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protected process(entities: Entity[]): void {
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const currentTime = Time.totalTime;
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for (const entity of entities) {
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this.processEntity(entity, currentTime);
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}
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}
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/**
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* 处理单个实体
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*/
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private processEntity(entity: Entity, currentTime: number): void {
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const velocity = entity.getComponent(Velocity);
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if (!velocity) return;
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// 检查是否需要改变方向
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const nextChangeTime = this.nextDirectionChangeTime.get(entity.id) || 0;
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if (currentTime >= nextChangeTime) {
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// 随机生成新的移动方向
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const angle = Math.random() * Math.PI * 2; // 0-360度
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const speed = 50 + Math.random() * 100; // 50-150的随机速度
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const newVelocityX = Math.cos(angle) * speed;
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const newVelocityY = Math.sin(angle) * speed;
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velocity.setVelocity(newVelocityX, newVelocityY);
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// 设置下次改变方向的时间（1-3秒后）
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const nextInterval = 1 + Math.random() * 2;
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this.nextDirectionChangeTime.set(entity.id, currentTime + nextInterval);
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}
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}
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/**
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* 当实体被添加到系统时
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*/
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protected onAdded(entity: Entity): void {
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// 为新实体设置初始方向改变时间
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const initialDelay = Math.random() * 2; // 0-2秒的初始延迟
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this.nextDirectionChangeTime.set(entity.id, Time.totalTime + initialDelay);
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}
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/**
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* 当实体从系统中移除时
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*/
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protected onRemoved(entity: Entity): void {
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// 清理实体的时间记录
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this.nextDirectionChangeTime.delete(entity.id);
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}
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/**
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* 系统初始化时调用
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*/
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public initialize(): void {
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super.initialize();
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console.log('🎲 随机移动系统已启动');
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}
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}
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