55 lines
1.7 KiB
TypeScript
55 lines
1.7 KiB
TypeScript
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const { ccclass } = cc._decorator;
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@ccclass
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export default class Shake extends cc.ActionInterval {
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private _init: boolean = false;
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private _initial_x: number = 0;
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private _initial_y: number = 0;
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private _strength_x: number = 0;
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private _strength_y: number = 0;
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/**
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* 建立抖動動畫
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* @param {number} duration 動畫持續時長
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* @param {number} strength_x 抖動幅度： x方向
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* @param {number} strength_y 抖動幅度： y方向
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* @returns {Shake}
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*/
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public static create(duration: number, strength_x: number, strength_y: number): Shake {
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let act: Shake = new Shake();
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act.initWithDuration(duration, strength_x, strength_y);
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return act;
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}
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public initWithDuration(duration: number, strength_x: number, strength_y: number): boolean {
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cc.ActionInterval.prototype['initWithDuration'].apply(this, arguments);
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this._strength_x = strength_x;
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this._strength_y = strength_y;
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return true;
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}
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public fgRangeRand(min: number, max: number): number {
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let rnd: number = Math.random();
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return rnd * (max - min) + min;
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}
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public update(time: number): void {
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let randx = this.fgRangeRand(-this._strength_x, this._strength_x);
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let randy = this.fgRangeRand(-this._strength_y, this._strength_y);
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this.getTarget()?.setPosition(randx + this._initial_x, randy + this._initial_y);
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}
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public startWithTarget(target: cc.Node): void {
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cc.ActionInterval.prototype['startWithTarget'].apply(this, arguments);
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if (!this._init) {
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this._init = true;
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this._initial_x = target.x;
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this._initial_y = target.y;
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}
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}
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public stop(): void {
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this.getTarget()?.setPosition(new cc.Vec2(this._initial_x, this._initial_y));
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cc.ActionInterval.prototype['stop'].apply(this);
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}
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}
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