87 lines
3.5 KiB
JavaScript
87 lines
3.5 KiB
JavaScript
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export default {
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cartesianToLnglat:(cartesian)=>{
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// //笛卡尔空间坐标转WGS84弧度.
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// const ellipsoid84 = Cesium.Ellipsoid.wgs84;
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// const cartographicPosition = ellipsoid84.cartesianToCartographic(cartesian);
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const cartographicPosition = Cesium.Cartographic.fromCartesian(cartesian);
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return [
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Cesium.Math.toDegrees(cartographicPosition.longitude),
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Cesium.Math.toDegrees(cartographicPosition.latitude),
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]
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},
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getCenterByPositions:(cartesianArr)=>{
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let points = [];
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cartesianArr.forEach(cartesianCoor=>{
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let cartesian = new Cesium.Cartesian3(cartesianCoor.x, cartesianCoor.y, cartesianCoor.z)
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points.push(cUtil.cartesianToLnglat(cartesian))
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})
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var features = turf.points(points);
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let center = turf.center(features);
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return center.geometry.coordinates;
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},
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/**
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* 全局唯一标识符（GUID，Globally Unique Identifier）也称作 UUID(Universally Unique IDentifier) 。
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* 可以指定长度
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* @param len
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* @param radix
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* @returns {string}
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*/
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uuid:function(len, radix) {
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var chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
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var uuid = [], i;
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radix = radix || chars.length;
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if (len) {
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// Compact form
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for (i = 0; i < len; i++) uuid[i] = chars[0 | Math.random()*radix];
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} else {
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// rfc4122, version 4 form
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var r;
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// rfc4122 requires these characters
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uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
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uuid[14] = '4';
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// Fill in random data. At i==19 set the high bits of clock sequence as
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// per rfc4122, sec. 4.1.5
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for (i = 0; i < 36; i++) {
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if (!uuid[i]) {
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r = 0 | Math.random() * 16;
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uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
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}
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}
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}
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return uuid.join('');
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},
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focus:(data,angle=-45,h=200)=>{
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const length = (Math.PI * Cesium.Ellipsoid.WGS84.minimumRadius) / 180;
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let dist = h/Math.tan( Math.abs(angle) * Math.PI/180)/length;
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viewer.camera.flyTo({
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destination : Cesium.Cartesian3.fromDegrees(data.lng, data.lat-dist, 200.0),
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orientation: {
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heading: 0.0,
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pitch: Cesium.Math.toRadians(angle),
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roll: 0.0,
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},
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});
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},
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}
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// 对Date的扩展，将 Date 转化为指定格式的String
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// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符，
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// 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字)
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// 例子：
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// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423
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// (new Date()).Format("yyyy-M-d h:m:s.S") ==> 2006-7-2 8:9:4.18
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Date.prototype.Format = function (fmt) { //author: meizz
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var o = {
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"M+": this.getMonth() + 1, //月份
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"d+": this.getDate(), //日
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"h+": this.getHours(), //小时
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"m+": this.getMinutes(), //分
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"s+": this.getSeconds(), //秒
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"q+": Math.floor((this.getMonth() + 3) / 3), //季度
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"S": this.getMilliseconds() //毫秒
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};
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if (/(y+)/.test(fmt)) fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
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for (var k in o)
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if (new RegExp("(" + k + ")").test(fmt)) fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
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return fmt;
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}
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