# Cocos Creator 摄像机抖动算法

**Published by:** [DorokGo](https://paragraph.com/@dorokgo/)
**Published on:** 2021-12-05
**URL:** https://paragraph.com/@dorokgo/cocos-creator

## Content

将下面脚本放到项目中去 然后调用 var action = cc.shake(0.4,15,15); this.node.runAction(action); 以下为代码： /** * 自定义抖动动作 */ var Shake = cc.ActionInterval.extend({ //节点初始位置 nodeInitialPos:null, //X轴抖动幅度 nodeShakeStrengthX:0, //Y轴抖动幅度 nodeShakeStrengthY:0, //抖动时间 duration:0, ctor:function(duration,shakeStrengthX,shakeStrengthY){ cc.ActionInterval.prototype.ctor.call(this); this.duration = duration; this.initWithDuration(duration,shakeStrengthX,shakeStrengthY); }, //获取两个数间的随机值 getRandomStrength:function(min,max){ return Math.random()*(max-min+1)+min; }, update:function(dt){ var randX=this.getRandomStrength(-this.nodeShakeStrengthX,this.nodeShakeStrengthX)*dt; var randY=this.getRandomStrength(-this.nodeShakeStrengthY,this.nodeShakeStrengthY)*dt; // cc.log("randX:"+randX+",randY="+randY); this.target.setPosition(cc.pAdd(this.nodeInitialPos,cc.p(randX,randY))); }, initWithDuration:function(duration,shakeStrengthX,shakeStrengthY){ if (cc.ActionInterval.prototype.initWithDuration.call(this, duration)) { this.nodeShakeStrengthX=shakeStrengthX; this.nodeShakeStrengthY=shakeStrengthY=='undefined'?shakeStrengthX:shakeStrengthY; return true; } return false; }, startWithTarget:function(target){ cc.ActionInterval.prototype.startWithTarget.call(this, target); this.nodeInitialPos=target.getPosition(); }, stop:function(){ this.target.setPosition(this.nodeInitialPos); } }); /** * 自定义抖动动作 * @param {float}duration 抖动时间 * @param {number}shakeStrengthX X轴抖动幅度 * @param {number}shakeStrengthY Y轴抖动幅度 * @returns {Shake} */ cc.shake = function(duration,shakeStrengthX,shakeStrengthY){ return new Shake(duration,shakeStrengthX,shakeStrengthY); };

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