JD——轨迹

log.js

function string10to64(d) {
    var c = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-~".split("")
        , b = c.length
        , e = +d
        , a = [];
    do {
        mod = e % b;
        e = (e - mod) / b;
        a.unshift(c[mod])
    } while (e);
    return a.join("")
}

function prefixInteger(a, b) {
        return (Array(b).join(0) + a).slice(-b)
    }

function pretreatment(d, c, b) {
    var e = string10to64(Math.abs(d));
    var a = "";
    if (!b) {
        a += (d > 0 ? "1" : "0")
    }
    a += prefixInteger(e, c);
    return a
}


function getCoordinate(c) {
    var b = new Array();
    for (var e = 0; e < c.length; e++) {
        if (e == 0) {
            b.push(pretreatment(c[e][0] < 262143 ? c[e][0] : 262143, 3, true));
            b.push(pretreatment(c[e][1] < 16777215 ? c[e][1] : 16777215, 4, true));
            b.push(pretreatment(c[e][2] < 4398046511103 ? c[e][2] : 4398046511103, 7, true))
        } else {
            var a = c[e][0] - c[e - 1][0];
            var f = c[e][1] - c[e - 1][1];
            var d = c[e][2] - c[e - 1][2];
            b.push(pretreatment(a < 4095 ? a : 4095, 2, false));
            b.push(pretreatment(f < 4095 ? f : 4095, 2, false));
            b.push(pretreatment(d < 16777215 ? d : 16777215, 4, true))
        }
    }
    return b.join("")
}

function slide(array) {
    g = array
    return getCoordinate(g)

}