99 lines
3.4 KiB
TypeScript
99 lines
3.4 KiB
TypeScript
import { EntitySystem, Entity, Matcher, Time } from '@esengine/ecs-framework';
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import { PositionComponent } from '../components/PositionComponent';
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import { VelocityComponent } from '../components/VelocityComponent';
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/**
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* 移动系统 - 处理实体的移动逻辑
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*
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* EntitySystem示例：
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* 1. 使用Matcher指定需要的组件（Position + Velocity）
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* 2. 每帧更新所有移动实体的位置
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* 3. 展示组件间的协作
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*/
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export class MovementSystem extends EntitySystem {
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constructor() {
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// 只处理同时拥有PositionComponent和VelocityComponent的实体
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super(Matcher.empty().all(PositionComponent, VelocityComponent));
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}
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/**
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* 每帧执行：更新所有移动实体的位置
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*/
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protected process(entities: Entity[]): void {
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for (const entity of entities) {
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const position = entity.getComponent(PositionComponent);
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const velocity = entity.getComponent(VelocityComponent);
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// 基本移动：位置 = 当前位置 + 速度 * 时间
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position.move(
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velocity.velocity.x * Time.deltaTime,
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velocity.velocity.y * Time.deltaTime,
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velocity.velocity.z * Time.deltaTime
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);
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// 应用阻尼（摩擦力）
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velocity.applyDamping(Time.deltaTime);
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// 可选：添加边界检查
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this.checkBoundaries(position, velocity);
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}
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}
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/**
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* 边界检查（可选功能）
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* 这个方法演示了如何在系统中实现额外的游戏逻辑
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*/
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private checkBoundaries(position: PositionComponent, velocity: VelocityComponent) {
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const bounds = {
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left: -400,
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right: 400,
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top: 300,
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bottom: -300
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};
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// 检查X轴边界
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if (position.position.x < bounds.left) {
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position.position.x = bounds.left;
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velocity.velocity.x = Math.abs(velocity.velocity.x); // 反弹
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} else if (position.position.x > bounds.right) {
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position.position.x = bounds.right;
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velocity.velocity.x = -Math.abs(velocity.velocity.x); // 反弹
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}
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// 检查Y轴边界
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if (position.position.y < bounds.bottom) {
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position.position.y = bounds.bottom;
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velocity.velocity.y = Math.abs(velocity.velocity.y); // 反弹
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} else if (position.position.y > bounds.top) {
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position.position.y = bounds.top;
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velocity.velocity.y = -Math.abs(velocity.velocity.y); // 反弹
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}
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}
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/**
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* 系统初始化时调用
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* 可以在这里设置系统级别的配置
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*/
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public initialize(): void {
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super.initialize();
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console.log("MovementSystem 已初始化 - 开始处理实体移动");
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}
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/**
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* 获取系统统计信息（用于调试）
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*/
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public getStats(): { processedEntities: number; totalMovement: number } {
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let totalMovement = 0;
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const entities = this.entities;
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for (const entity of entities) {
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const position = entity.getComponent(PositionComponent);
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totalMovement += position.getMovementDistance();
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}
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return {
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processedEntities: entities.length,
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totalMovement: totalMovement
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};
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}
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}
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