team2_nc/assets/Scripts/UI/Factory/FactorySystem.ts

import { _decorator, Component, Node, SystemEventType, find, EventTouch, UITransform, Vec2 } from 'cc';
import { GeometryUtils } from '../../core/utils/GeometryUtils';
import { MapIcon } from '../../Main/MapIcon';
import { TouchHelper } from '../../Main/TouchHelper';
const { ccclass, property } = _decorator;

@ccclass('FactorySystem')
export class FactorySystem extends Component {
    @property({ type: [MapIcon], tooltip: "工厂合计" }) factorys: Array<MapIcon> = [];

    private isMoved = false;
    private canvas: Node;
    start() {
        this.canvas = find("Canvas");
        this.canvas.on(SystemEventType.TOUCH_MOVE, this.onTouchMove, this);
        this.canvas.on(SystemEventType.TOUCH_CANCEL, this.onTouchCancel, this);
        this.canvas.on(SystemEventType.TOUCH_END, this.onTouchEnd, this);
    }

    private onTouchEnd(e: EventTouch): void {
        let isInPoly = false;
        for (let i = 0; i < this.factorys.length; i++) {
            const factorys = this.factorys[i];
            const touchHelper = factorys.getComponent(TouchHelper);
            if (!this.isMoved && touchHelper.points.length >= 3) {
                this.isMoved = false;
                let touchPoint = e.getUILocation();
                let localPoint = factorys.node.getComponent(UITransform).convertToNodeSpaceAR(GeometryUtils.V2ToV3(touchPoint));
                isInPoly = GeometryUtils.pointInPoly(localPoint, touchHelper.points);
                if (isInPoly) {//农场被点击
                    factorys.inPolygon.call(factorys);
                    return;
                }
            }
        }
        this.isMoved = false;
    }

    public clean(): void {
        for (let i = 0; i < this.factorys.length; i++) {
            this.factorys[i].clean();
        }
    }

    private onTouchMove(e: EventTouch) {
        if (e.getAllTouches().length > 1) { this.isMoved = true; return }
        this.isMoved = Vec2.distance(e.getStartLocation(), e.getLocation()) > 20;
    }
    private onTouchCancel(e: EventTouch) {
        this.isMoved = false;
    }
}