MiaoDaren/assets/scripts/TouchPinch.js

var t = require;
var e = module;
var i = exports;
Object.defineProperty(i, "__esModule", {value: !0}),
    (i.default = class {
        constructor() {
            (this.pinchFirst = null),
                (this.pinchSecond = null),
                (this.startPinchDist = 0),
                (this.lastPinchDist = 0),
                (this.pinchDist = 0),
                (this.pinchCenter = cc.v2());
        }
        reset() {
            (this.pinchFirst = null), (this.pinchSecond = null), (this.startPinchDist = 0);
        }
        onTouchStart(t) {
            this.pinchFirst && this.pinchFirst.id === t.id
                ? ((this.pinchFirst = t), (this.pinchSecond = null), (this.startPinchDist = 0))
                : this.pinchSecond && this.pinchSecond.id === t.id
                ? ((this.pinchFirst = null), (this.pinchSecond = t), (this.startPinchDist = 0))
                : this.pinchFirst
                ? this.pinchSecond || ((this.pinchSecond = t), (this.startPinchDist = 0))
                : ((this.pinchFirst = t), (this.startPinchDist = 0));
        }
        onTouchEnd(t) {
            this.pinchFirst && this.pinchFirst.id === t.id && (this.pinchFirst = null),
                this.pinchSecond && this.pinchSecond.id === t.id && (this.pinchSecond = null);
        }
        onPinch(t) {
            if (this.pinchFirst && this.pinchSecond) {
                if (this.startPinchDist)
                    return (
                        (this.lastPinchDist = this.pinchDist),
                        (this.pinchCenter.x = (this.pinchFirst.screenPos.x + this.pinchSecond.screenPos.x) / 2),
                        (this.pinchCenter.y = (this.pinchFirst.screenPos.y + this.pinchSecond.screenPos.y) / 2),
                        (this.pinchDist = cc.Vec2.distance(this.pinchFirst.screenPos, this.pinchSecond.screenPos)),
                        t && t(this.pinchCenter, this.lastPinchDist, this.pinchDist),
                        !0
                    );
                (this.startPinchDist = cc.Vec2.distance(
                    this.pinchFirst.startScreenPos,
                    this.pinchSecond.startScreenPos
                )),
                    (this.pinchDist = this.startPinchDist);
            }
            return !1;
        }
    });