timeRemap_by_layer.js

// レイヤーの長さでタイムリマップを制御

var range = 3; //はじめと終わり、本来の秒数
var effectSpeed = 2; //何倍の早さで動かすか

var currentTime;
if(time>outPoint-(range/effectSpeed)){
    //終わり
    currentTime = (range*2)-(outPoint-time) * effectSpeed;
}else if(time<inPoint+(range/effectSpeed)){
    //始まり
    currentTime = (time - inPoint) * effectSpeed;
}else{
    //中間
    currentTime = range;
}

//出力
currentTime;