var origins = _this.form.onlatitude + ',' + _this.form.onlongitude
var destinations = _this.form.overlatitude + ',' + _this.form.overlongitude
wx.request({
    dataType: "jsonp",
    jsonp: "callback",
    type: "get",
    url: `https://router.hereapi.com/v8/routes?transportMode=car&origin=${origins}&destination=${destinations}&return=polyline,summary&apikey=XXXXXXX`,
    success: (res) => {
        var points = [];
        var data = JSON.parse(res.data).routes
        console.log(decode.decode(data[0].sections[0].polyline))
        var steps = decode.decode(data[0].sections[0].polyline).polyline
        for (var i = 0; i < steps.length; i++) {
            points.push({
                latitude: steps[i][0],
                longitude: steps[i][1]
            })
            console.log(points)
        }
        _this.polyline = [{
            points: points,
            color: "#ff0000",
            width: 8,
            dottedLine: false
        }]
}