太阳球体

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            function updateTime() {

                // 获取当前时间
                var date = new Date();
                var year = date.getFullYear();
                var month = date.getMonth();
                var week = date.getDay();
                var day = date.getDate();
                var hour = date.getHours();
                var mim = date.getMinutes();
                var second = date.getSeconds();
                // 获取儒略日
                var jd = getJulianDay(year, month + 1, day);
                // 经纬度
                var latitude = position.coords.latitude;
                var longitude = position.coords.longitude;
                // 时区
                var tz = 8;
                // 今天已过了多少分钟
                var tl = getLocalTime(hour, mim, second);
                // 使用时间、时区修正的分钟数
                var t = jd + tl / 1440.0 - tz / 24.0;
                // 世纪数calcSolNoon(t, longitude, tz,0)
                t = calcTimeJulianCent(t);
                this.year = date.getFullYear();
                this.month = date.getMonth() + 1;
                this.date = date.getDate();
                this.day = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六")[date.getDay()];
                this.hour = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
                this.minute = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
                this.second = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
                var currentTime = this.year + "." + this.month + "." + this.date + "," + this.day + "," + this.hour + ":" + this.minute + ":" + this.second;
                var fwj = calcazimuth(t, tl, latitude, longitude, tz, 0);




                $("#sj").html(currentTime);
                $("#dj").html('经度: ' + longitude);
                $("#bw").html('纬度: ' + latitude);
                $("#sc").html('时差:' + calcEquationOfTime(t)); // 时差
                $("#cj").html('赤经:' + calcSunRtAscension(t)); // 赤经
                $("#cw").html('赤纬:' + calcSunDeclination(t)); //赤纬
                $("#fwj").html('方位角:' + fwj); // 方位角
                var gdj = calcelevation(t, tl, latitude, longitude, tz);

                $("#gdj").html('高度角:' + gdj); // 高度角
                var sunr = 500;

                var x = roundWithTwoDecimals(-sunr * Math.sin(fwj * 3.14 / 180));
                var y = roundWithTwoDecimals(sunr * Math.sin(gdj * 3.14 / 180));
                var z = roundWithTwoDecimals(sunr * Math.cos(fwj * 3.14 / 180));


                var w = roundWithTwoDecimals(sunr * Math.cos(gdj * 3.14 / 180));


                /*
                                //θ=高度角，φ=方位角
                                
                                 var sunx = (sunr * Math.sin(gdj) * Math.cos(fwj));
                var suny = (sunr * Math.sin(gdj) * Math.sin(fwj));
                var sunz = (sunr * Math.cos(gdj));
                                
                */
                $("#ty").html('太阳位置：' + x + " " + y + " " + z + " " + w);

                $('#sun_tf').attr("translation", x + " " + y + " " + z);
                //  $("#richu").html('日出:56'); //赤纬
                //$("#an").html(3 + Math.sin((2 * Math.PI / 360) * 6 * (second)) * 3);

                //var Y = b - Math.cos(hudu) * r //  注意此处是“-”号，因为我们要得到的Y是相对于（0,0）而言的。



            }