如题，我想要根据玩家和音源的距离来动态设置音量
可是设置不起作用。
代码：
`
properties: {
audio: cc.AudioSource
},
onLoad: function () {
let manager = cc.director.getCollisionManager();
manager.enabled = true;
//console.log(this.audio);
},
onCollisionStay: function(other,self){
if(other.node.group == 'player'){
let vector = this.node.convertToNodeSpaceAR(other.node.parent.convertToWorldSpaceAR(other.node.position));
let otherDistance = vector.mag();
let selfDistance = self.radius;
let rate = cc.clamp01(otherDistance / selfDistance);
let revertRate = 1 - rate;
this.audio.volume = revertRate / 2;
}
},
onCollisionExit: function(other,self){
if(other.node.group == 'player'){
this.audio.volume = 0;
}
},
`