(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ?
module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = typeof globalThis !== 'undefined' ? globalThis :
global || self, global.mapboxgl1.XYZLayer = factory());
}(window, (function () {
'use strict';
/*
* @namespace Util
*
* Various utility functions, used by Leaflet internally.
*/
Object.freeze = function (obj) {
return obj;
};
// @function create(proto: Object, properties?: Object): Object
// Compatibility polyfill for [Object.create](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/create)
var create$3 = Object.create || function () {
function F() {}
return function (proto) {
F.prototype = proto;
return new F();
};
}();
// @function setOptions(obj: Object, options: Object): Object
// Merges the given properties to the `options` of the `obj` object, returning the resulting options. See `Class options`. Has an `L.setOptions` shortcut.
function setOptions(obj, options) {
if (!obj.hasOwnProperty('options')) {
obj.options = obj.options ? create$3(obj.options) : {};
}
for (var i in options) {
obj.options[i] = options[i] || obj.options[i];
}
return obj.options;
}
var templateRe = /\{ *([\w_-]+) *\}/g;
// @function template(str: String, data: Object): String
// Simple templating facility, accepts a template string of the form `'Hello {a}, {b}'`
// and a data object like `{a: 'foo', b: 'bar'}`, returns evaluated string
// `('Hello foo, bar')`. You can also specify functions instead of strings for
// data values — they will be evaluated passing `data` as an argument.
function template(str, data) {
return str.replace(templateRe, function (str, key) {
var value = data[key];
if (value === undefined) {
throw new Error('No value provided for variable ' + str);
} else if (typeof value === 'function') {
value = value(data);
}
return value;
});
}
// @function isArray(obj): Boolean
// Compatibility polyfill for [Array.isArray](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray)
var isArray = Array.isArray || function (obj) {
return Object.prototype.toString.call(obj) === '[object Array]';
};
//坐标转换
var pi = 3.1415926535897932384626;
var a = 6378245.0;
var ee = 0.00669342162296594323;
var x_pi = pi * 3000.0 / 180.0;
/**百度转84*/
function bd09_To_gps84(lng, lat) {
if (isArray(lng)) {
var _lng = lng[0];
lat = lng[1];
lng = _lng;
}
if (lng instanceof Object) {
var _lng = lng.lng;
lat = lng.lat;
lng = _lng;
}
var gcj02 = bd09_To_gcj02(lng, lat);
var map84 = gcj02_To_gps84(gcj02.lng, gcj02.lat);
return map84;
}
/**84转百度*/
function gps84_To_bd09(lng, lat) {
if (isArray(lng)) {
var _lng = lng[0];
lat = lng[1];
lng = _lng;
}
if (lng instanceof Object) {
var _lng = lng.lng;
lat = lng.lat;
lng = _lng;
}
var gcj02 = gps84_To_gcj02(lng, lat);
var bd09 = gcj02_To_bd09(gcj02.lng, gcj02.lat);
return bd09;
}
/**84转火星*/
function gps84_To_gcj02(lng, lat) {
if (isArray(lng)) {
var _lng = lng[0];
lat = lng[1];
lng = _lng;
}
if (lng instanceof Object) {
var _lng = lng.lng;
lat = lng.lat;
lng = _lng;
}
var dLat = transformLat(lng - 105.0, lat - 35.0);
var dLng = transformLng(lng - 105.0, lat - 35.0);
var radLat = lat / 180.0 * pi;
var magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
var sqrtMagic = Math.sqrt(magic);
dLat = dLat * 180.0 / (a * (1 - ee) / (magic * sqrtMagic) * pi);
dLng = dLng * 180.0 / (a / sqrtMagic * Math.cos(radLat) * pi);
var mgLat = lat + dLat;
var mgLng = lng + dLng;
var newCoord = {
lng: mgLng,
lat: mgLat
};
return newCoord;
}
/**火星转84*/
function gcj02_To_gps84(lng, lat) {
if (isArray(lng)) {
var _lng = lng[0];
lat = lng[1];
lng = _lng;
}
if (lng instanceof Object) {
var _lng = lng.lng;
lat = lng.lat;
lng = _lng;
}
var coord = transform(lng, lat);
var lontitude = lng * 2 - coord.lng;
var latitude = lat * 2 - coord.lat;
var newCoord = {
lng: lontitude,
lat: latitude
};
return newCoord;
}
/**火星转百度*/
function gcj02_To_bd09(x, y) {
var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
var bd_lng = z * Math.cos(theta) + 0.0065;
var bd_lat = z * Math.sin(theta) + 0.006;
var newCoord = {
lng: bd_lng,
lat: bd_lat
};
return newCoord;
}
/**百度转火星*/
function bd09_To_gcj02(bd_lng, bd_lat) {
var x = bd_lng - 0.0065;
var y = bd_lat - 0.006;
var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
var gg_lng = z * Math.cos(theta);
var gg_lat = z * Math.sin(theta);
var newCoord = {
lng: gg_lng,
lat: gg_lat
};
return newCoord;
}
function transform(lng, lat) {
var dLat = transformLat(lng - 105.0, lat - 35.0);
var dLng = transformLng(lng - 105.0, lat - 35.0);
var radLat = lat / 180.0 * pi;
var magic = Math.sin(radLat);
magic = 1 - ee * magic * magic;
var sqrtMagic = Math.sqrt(magic);
dLat = dLat * 180.0 / (a * (1 - ee) / (magic * sqrtMagic) * pi);
dLng = dLng * 180.0 / (a / sqrtMagic * Math.cos(radLat) * pi);
var mgLat = lat + dLat;
var mgLng = lng + dLng;
var newCoord = {
lng: mgLng,
lat: mgLat
};
return newCoord;
}
function transformLat(x, y) {
var ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
return ret;
}
function transformLng(x, y) {
var ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;
return ret;
}
//经纬度转xyz协议瓦片编号
function lonLatToTileNumbers(lon_deg, lat_deg, zoom) {
// 地球半径
/* const r = 6378137;
// 地球周长
const C = 2 * Math.PI * 6378137;
// 瓦片像素
const titleSize = 256;
// 获取某一层级下的分辨率(X,Y方向适)
const getResolution = (n) => {
const tileNums = Math.pow(2, n)
const tileTotalPx = tileNums * titleSize
return C / tileTotalPx
}
// 4326转3857
const lngLatMercator = (lng, lat) => {
//注意先转为为弧度制，弧度=角度*Math.PI/180，弧长=弧度*半径
let x = lng * (Math.PI / 180) * r;
let rad = lat * (Math.PI / 180)
let sin = Math.sin(rad)
let y = r / 2 * Math.log((1 + sin) / (1 - sin))
return [x, y]
}
// 根据像素坐标及缩放层级计算瓦片行列号
const getTileRowAndCol = (x, y, z) => {
//因为3857与4326坐标原点位于经纬度为零的地方，而瓦片坐标原点位于左上角，所以需要将3857坐标原点转到左上角
x += C / 2;
y = C / 2 - y;
let resolutionX = getResolution(z)//获取某一层级z下的分辨率
let row = Math.floor(x / resolutionX / tileSize)
let col = Math.floor(y / resolutionY / tileSize)
return [row, col]
}
return getTileRowAndCol(...lngLatMercator(lon_deg,lat_deg),zoom);*/
/* console.log(lon_deg,lat_deg,zoom);
function lon2tile(lon,zoom) {
return (Math.floor((lon+180)/360*Math.pow(2,zoom)));
}
function lat2tile(lat,zoom) {
return (Math.floor((1-Math.log(Math.tan(lat*Math.PI/180) + 1/Math.cos(lat*Math.PI/180))/Math.PI)/2 *Math.pow(2,zoom)));
}
return [lon2tile(lon_deg,zoom),lat2tile(lat_deg,zoom)];*/
var lat_rad = pi / 180 * lat_deg; //math.radians(lat_deg) 角度转弧度
var n = Math.pow(2, zoom);
var xtile = parseInt((lon_deg + 180.0) / 360.0 * n);
var ytile = parseInt((1.0 - Math.asinh(Math.tan(lat_rad)) / pi) / 2.0 * n);
return [xtile, ytile];
}
//xyz协议瓦片编号转经纬度
function tileNumbersToLonLat(xtile, ytile, zoom) {
/* function tile2long(x,z) {
return (x/Math.pow(2,z)*360-180);
}
function tile2lat(y,z) {
var n=Math.PI-2*Math.PI*y/Math.pow(2,z);
return (180/Math.PI*Math.atan(0.5*(Math.exp(n)-Math.exp(-n))));
}
return [tile2long(xtile, zoom),tile2lat(ytile,zoom)];*/
let n = Math.pow(2, zoom);
let lon_deg = xtile / n * 360.0 - 180.0;
let lat_rad = Math.atan(Math.sinh(pi * (1 - 2 * ytile / n)));
let lat_deg = lat_rad * 180.0 / pi;
return [lon_deg, lat_deg];
}
/*
* Created by CntChen 2016.05.04
* 从百度JavaScritp API v2.0 抽取代码,并作少量命名修改
* http://lbsyun.baidu.com/index.php?title=jspopular
* http://api.map.baidu.com/getscript?v=2.0&ak=E4805d16520de693a3fe707cdc962045&t=20160503160001
*/
// ----- Baidu API start
// util function
function Extend(a, b) {
for (var c in b) b.hasOwnProperty(c) && (a[c] = b[c]);
return a;
}
function S(a, b) {
for (var c in b) a[c] = b[c];
}
function Xa(a) {
return "string" == typeof a;
}
var j = void 0,
p = null;
// Point
function H(a, b) {
isNaN(a) && (a = Ib(a), a = isNaN(a) ? 0 : a);
Xa(a) && (a = parseFloat(a));
isNaN(b) && (b = Ib(b), b = isNaN(b) ? 0 : b);
Xa(b) && (b = parseFloat(b));
this.lng = a;
this.lat = b;
}
H.TL = function (a) {
return a && 180 >= a.lng && -180 <= a.lng && 74 >= a.lat && -74 <= a.lat;
};
H.prototype.lb = function (a) {
return a && this.lat == a.lat && this.lng == a.lng;
};
// Pixel
function Q(a, b) {
this.x = a || 0;
this.y = b || 0;
this.x = this.x;
this.y = this.y;
}
Q.prototype.lb = function (a) {
return a && a.x == this.x && a.y == this.y;
};
// MercatorProjection
function fc() {}
fc.prototype.nh = function () {
aa("lngLatToPoint\u65b9\u6cd5\u672a\u5b9e\u73b0");
};
fc.prototype.wi = function () {
aa("pointToLngLat\u65b9\u6cd5\u672a\u5b9e\u73b0");
};
function R() {}
R.prototype = new fc();
Extend(R, {
$O: 6370996.81,
lG: [1.289059486E7, 8362377.87, 5591021, 3481989.83, 1678043.12, 0],
Au: [75, 60, 45, 30, 15, 0],
fP: [[1.410526172116255E-8, 8.98305509648872E-6, -1.9939833816331, 200.9824383106796, -187.2403703815547, 91.6087516669843, -23.38765649603339, 2.57121317296198, -0.03801003308653, 1.73379812E7], [-7.435856389565537E-9, 8.983055097726239E-6, -0.78625201886289, 96.32687599759846, -1.85204757529826, -59.36935905485877, 47.40033549296737, -16.50741931063887, 2.28786674699375, 1.026014486E7], [-3.030883460898826E-8, 8.98305509983578E-6, 0.30071316287616, 59.74293618442277, 7.357984074871, -25.38371002664745, 13.45380521110908, -3.29883767235584, 0.32710905363475, 6856817.37], [-1.981981304930552E-8, 8.983055099779535E-6, 0.03278182852591, 40.31678527705744, 0.65659298677277, -4.44255534477492, 0.85341911805263, 0.12923347998204, -0.04625736007561, 4482777.06], [3.09191371068437E-9, 8.983055096812155E-6, 6.995724062E-5, 23.10934304144901, -2.3663490511E-4, -0.6321817810242, -0.00663494467273, 0.03430082397953, -0.00466043876332, 2555164.4], [2.890871144776878E-9, 8.983055095805407E-6, -3.068298E-8, 7.47137025468032, -3.53937994E-6, -0.02145144861037, -1.234426596E-5, 1.0322952773E-4, -3.23890364E-6, 826088.5]],
iG: [[-0.0015702102444, 111320.7020616939, 1704480524535203, -10338987376042340, 26112667856603880, -35149669176653700, 26595700718403920, -10725012454188240, 1800819912950474, 82.5], [8.277824516172526E-4, 111320.7020463578, 6.477955746671607E8, -4.082003173641316E9, 1.077490566351142E10, -1.517187553151559E10, 1.205306533862167E10, -5.124939663577472E9, 9.133119359512032E8, 67.5], [0.00337398766765, 111320.7020202162, 4481351.045890365, -2.339375119931662E7, 7.968221547186455E7, -1.159649932797253E8, 9.723671115602145E7, -4.366194633752821E7, 8477230.501135234, 52.5], [0.00220636496208, 111320.7020209128, 51751.86112841131, 3796837.749470245, 992013.7397791013, -1221952.21711287, 1340652.697009075, -620943.6990984312, 144416.9293806241, 37.5], [-3.441963504368392E-4, 111320.7020576856, 278.2353980772752, 2485758.690035394, 6070.750963243378, 54821.18345352118, 9540.606633304236, -2710.55326746645, 1405.483844121726, 22.5], [-3.218135878613132E-4, 111320.7020701615, 0.00369383431289, 823725.6402795718, 0.46104986909093, 2351.343141331292, 1.58060784298199, 8.77738589078284, 0.37238884252424, 7.45]],
Z1: function (a, b) {
if (!a || !b) return 0;
var c,
d,
a = this.Fb(a);
if (!a) return 0;
c = this.Tk(a.lng);
d = this.Tk(a.lat);
b = this.Fb(b);
return !b ? 0 : this.Pe(c, this.Tk(b.lng), d, this.Tk(b.lat));
},
Vo: function (a, b) {
if (!a || !b) return 0;
a.lng = this.JD(a.lng, -180, 180);
a.lat = this.ND(a.lat, -74, 74);
b.lng = this.JD(b.lng, -180, 180);
b.lat = this.ND(b.lat, -74, 74);
return this.Pe(this.Tk(a.lng), this.Tk(b.lng), this.Tk(a.lat), this.Tk(b.lat));
},
Fb: function (a) {
if (a === p || a === j) return new H(0, 0);
var b, c;
b = new H(Math.abs(a.lng), Math.abs(a.lat));
for (var d = 0; d < this.lG.length; d++) if (b.lat >= this.lG[d]) {
c = this.fP[d];
break;
}
a = this.gK(a, c);
return a = new H(a.lng.toFixed(6), a.lat.toFixed(6));
},
Eb: function (a) {
if (a === p || a === j || 180 < a.lng || -180 > a.lng || 90 < a.lat || -90 > a.lat) return new H(0, 0);
var b, c;
a.lng = this.JD(a.lng, -180, 180);
a.lat = this.ND(a.lat, -74, 74);
b = new H(a.lng, a.lat);
for (var d = 0; d < this.Au.length; d++) if (b.lat >= this.Au[d]) {
c = this.iG[d];
break;
}
// 对疑似bug的修改 start
// by CntChen 2016.05.08
// @2016-09-19 已经得到官方确认为bug：https://cntchen.github.io/2016/05/09/%E7%99%BE%E5%BA%A6JavaScirpt%20%20API%E4%B8%AD%E7%BB%8F%E7%BA%AC%E5%BA%A6%E5%9D%90%E6%A0%87%E8%BD%AC%E7%93%A6%E7%89%87%E5%9D%90%E6%A0%87bug/
if (!c) for (d = 0; d < this.Au.length; d++) if (b.lat <= -this.Au[d]) {
c = this.iG[d];
break;
}
// 对疑似bug的修改 end
// Baidu JavaScript 中原本代码, 2016.05.08依然如此
// if (!c)
// for (d = this.Au.length - 1; 0 <= d; d--)
// if (b.lat <= -this.Au[d]) {
// c = this.iG[d];
// break
// }
// Baidu JavaScript 中原本代码 end
a = this.gK(a, c);
return a = new H(a.lng.toFixed(2), a.lat.toFixed(2));
},
gK: function (a, b) {
if (a && b) {
var c = b[0] + b[1] * Math.abs(a.lng),
d = Math.abs(a.lat) / b[9],
d = b[2] + b[3] * d + b[4] * d * d + b[5] * d * d * d + b[6] * d * d * d * d + b[7] * d * d * d * d * d + b[8] * d * d * d * d * d * d,
c = c * (0 > a.lng ? -1 : 1),
d = d * (0 > a.lat ? -1 : 1);
return new H(c, d);
}
},
Pe: function (a, b, c, d) {
return this.$O * Math.acos(Math.sin(c) * Math.sin(d) + Math.cos(c) * Math.cos(d) * Math.cos(b - a));
},
Tk: function (a) {
return Math.PI * a / 180;
},
Z3: function (a) {
return 180 * a / Math.PI;
},
ND: function (a, b, c) {
b != p && (a = Math.max(a, b));
c != p && (a = Math.min(a, c));
return a;
},
JD: function (a, b, c) {
for (; a > c;) a -= c - b;
for (; a < b;) a += c - b;
return a;
}
});
Extend(R.prototype, {
Jm: function (a) {
return R.Eb(a);
},
nh: function (a) {
a = R.Eb(a);
return new Q(a.lng, a.lat);
},
qh: function (a) {
return R.Fb(a);
},
wi: function (a) {
a = new H(a.x, a.y);
return R.Fb(a);
},
fc: function (a, b, c, d, e) {
if (a) return a = this.Jm(a, e), b = this.Lc(b), new Q(Math.round((a.lng - c.lng) / b + d.width / 2), Math.round((c.lat - a.lat) / b + d.height / 2));
},
zb: function (a, b, c, d, e) {
if (a) return b = this.Lc(b), this.qh(new H(c.lng + b * (a.x - d.width / 2), c.lat - b * (a.y - d.height / 2)), e);
},
Lc: function (a) {
return Math.pow(2, 18 - a);
}
});
var Je = R.prototype;
S(Je, {
lngLatToPoint: Je.nh,
pointToLngLat: Je.wi
});
// ----- Baidu API end
let BMap = {
Point: H,
Pixel: Q,
MercatorProjection: R
};
/*
* Created by CntChen 2016.05.04
* 坐标相关参考文章：
* http://www.cnblogs.com/jz1108/archive/2011/07/02/2095376.html
* http://www.cnblogs.com/janehlp/archive/2012/08/27/2658106.html
* 适用地图：百度
*/
class TransformClassBaidu {
constructor(levelRange_max, LevelRange_min) {
this.levelMax = levelRange_max;
this.levelMin = LevelRange_min;
this.projection = new BMap.MercatorProjection();
}
_getRetain(level) {
return Math.pow(2, level - 18);
}
/*
* 分辨率，表示水平方向上一个像素点代表的真实距离(m)
* 百度地图18级时的平面坐标就是地图距离原点的距离(m)
* 使用{lng:180, lat:0}时候的pointX是否等于地球赤道长一半来验证
*/
getResolution(latitude, level) {
return Math.pow(2, 18 - level) * Math.cos(latitude);
}
/*
* 从经纬度到百度平面坐标
*/
lnglatToPoint(longitude, latitude) {
let lnglat = new BMap.Point(longitude, latitude);
let point = this.projection.lngLatToPoint(lnglat);
// 提取对象的字段并返回
return {
pointX: point.x,
pointY: point.y
};
}
/*
* 从百度平面坐标到经纬度
*/
pointToLnglat(pointX, pointY) {
let point = new BMap.Pixel(pointX, pointY);
let lnglat = this.projection.pointToLngLat(point);
// 不直接返回lnglat对象，因为该对象在百SDK中还有其他属性和方法
// 提取对象的字段后，与其他地图平台统一Lnglat的格式
return {
lng: lnglat.lng,
lat: lnglat.lat
};
}
_lngToTileX(longitude, level) {
let point = this.lnglatToPoint(longitude, 0);
let tileX = Math.floor(point.pointX * this._getRetain(level) / 256);
return tileX;
}
_latToTileY(latitude, level) {
let point = this.lnglatToPoint(0, latitude);
let tileY = Math.floor(point.pointY * this._getRetain(level) / 256);
return tileY;
}
/*
* 从经纬度获取某一级别瓦片编号
*/
lnglatToTile(longitude, latitude, level) {
let tileX = this._lngToTileX(longitude, level);
let tileY = this._latToTileY(latitude, level);
return [tileX, tileY];
}
_lngToPixelX(longitude, level) {
let tileX = this._lngToTileX(longitude, level);
let point = this.lnglatToPoint(longitude, 0);
let pixelX = Math.floor(point.pointX * this._getRetain(level) - tileX * 256);
return pixelX;
}
_latToPixelY(latitude, level) {
let tileY = this._latToTileY(latitude, level);
let point = this.lnglatToPoint(0, latitude);
let pixelY = Math.floor(point.pointY * this._getRetain(level) - tileY * 256);
return pixelY;
}
/*
* 从经纬度到瓦片的像素坐标
*/
lnglatToPixel(longitude, latitude, level) {
let pixelX = this._lngToPixelX(longitude, level);
let pixelY = this._latToPixelY(latitude, level);
return {
pixelX,
pixelY
};
}
_pixelXToLng(pixelX, tileX, level) {
let pointX = (tileX * 256 + pixelX) / this._getRetain(level);
let lnglat = this.pointToLnglat(pointX, 0);
return lnglat.lng;
}
_pixelYToLat(pixelY, tileY, level) {
let pointY = (tileY * 256 + pixelY) / this._getRetain(level);
let lnglat = this.pointToLnglat(0, pointY);
return lnglat.lat;
}
/*
* 从某一瓦片的某一像素点到经纬度
*/
pixelToLnglat(pixelX, pixelY, tileX, tileY, level) {
let pointX = (tileX * 256 + pixelX) / this._getRetain(level);
let pointY = (tileY * 256 + pixelY) / this._getRetain(level);
let lnglat = this.pointToLnglat(pointX, pointY);
return [lnglat.lng, lnglat.lat];
}
}
function _classCallCheck(instance, Constructor) {
if (!(instance instanceof Constructor)) {
throw new TypeError("Cannot call a class as a function");
}
}
function _defineProperties(target, props) {
for (var i = 0; i < props.length; i++) {
var descriptor = props[i];
descriptor.enumerable = descriptor.enumerable || false;
descriptor.configurable = true;
if ("value" in descriptor) descriptor.writable = true;
Object.defineProperty(target, descriptor.key, descriptor);
}
}
function _createClass(Constructor, protoProps, staticProps) {
if (protoProps) _defineProperties(Constructor.prototype, protoProps);
if (staticProps) _defineProperties(Constructor, staticProps);
return Constructor;
}
function getDefaultExportFromCjs (x) {
return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
}
var _typeof$1 = {exports: {}};
(function (module) {
function _typeof(obj) {
"@babel/helpers - typeof";
if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
module.exports = _typeof = function _typeof(obj) {
return typeof obj;
};
module.exports["default"] = module.exports, module.exports.__esModule = true;
} else {
module.exports = _typeof = function _typeof(obj) {
return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
};
module.exports["default"] = module.exports, module.exports.__esModule = true;
}
return _typeof(obj);
}
module.exports = _typeof;
module.exports["default"] = module.exports, module.exports.__esModule = true;
}(_typeof$1));
var _typeof = /*@__PURE__*/getDefaultExportFromCjs(_typeof$1.exports);
function _assertThisInitialized(self) {
if (self === void 0) {
throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
}
return self;
}
function _possibleConstructorReturn(self, call) {
if (call && (_typeof(call) === "object" || typeof call === "function")) {
return call;
}
return _assertThisInitialized(self);
}
function _getPrototypeOf(o) {
_getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
return o.__proto__ || Object.getPrototypeOf(o);
};
return _getPrototypeOf(o);
}
function _setPrototypeOf(o, p) {
_setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
o.__proto__ = p;
return o;
};
return _setPrototypeOf(o, p);
}
function _inherits(subClass, superClass) {
if (typeof superClass !== "function" && superClass !== null) {
throw new TypeError("Super expression must either be null or a function");
}
subClass.prototype = Object.create(superClass && superClass.prototype, {
constructor: {
value: subClass,
writable: true,
configurable: true
}
});
if (superClass) _setPrototypeOf(subClass, superClass);
}
function _arrayWithHoles(arr) {
if (Array.isArray(arr)) return arr;
}
function _iterableToArrayLimit(arr, i) {
var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"];
if (_i == null) return;
var _arr = [];
var _n = true;
var _d = false;
var _s, _e;
try {
for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
_arr.push(_s.value);
if (i && _arr.length === i) break;
}
} catch (err) {
_d = true;
_e = err;
} finally {
try {
if (!_n && _i["return"] != null) _i["return"]();
} finally {
if (_d) throw _e;
}
}
return _arr;
}
function _arrayLikeToArray(arr, len) {
if (len == null || len > arr.length) len = arr.length;
for (var i = 0, arr2 = new Array(len); i < len; i++) {
arr2[i] = arr[i];
}
return arr2;
}
function _unsupportedIterableToArray(o, minLen) {
if (!o) return;
if (typeof o === "string") return _arrayLikeToArray(o, minLen);
var n = Object.prototype.toString.call(o).slice(8, -1);
if (n === "Object" && o.constructor) n = o.constructor.name;
if (n === "Map" || n === "Set") return Array.from(o);
if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
}
function _nonIterableRest() {
throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
function _slicedToArray(arr, i) {
return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
}
/**
* Common utilities
* @module glMatrix
*/
// Configuration Constants
var EPSILON = 0.000001;
var ARRAY_TYPE = typeof Float32Array !== 'undefined' ? Float32Array : Array;
if (!Math.hypot) Math.hypot = function () {
var y = 0,
i = arguments.length;
while (i--) {
y += arguments[i] * arguments[i];
}
return Math.sqrt(y);
};
/**
* 4 Dimensional Vector
* @module vec4
*/
/**
* Creates a new, empty vec4
*
* @returns {vec4} a new 4D vector
*/
function create$2() {
var out = new ARRAY_TYPE(4);
if (ARRAY_TYPE != Float32Array) {
out[0] = 0;
out[1] = 0;
out[2] = 0;
out[3] = 0;
}
return out;
}
/**
* Scales a vec4 by a scalar number
*
* @param {vec4} out the receiving vector
* @param {ReadonlyVec4} a the vector to scale
* @param {Number} b amount to scale the vector by
* @returns {vec4} out
*/
function scale$1(out, a, b) {
out[0] = a[0] * b;
out[1] = a[1] * b;
out[2] = a[2] * b;
out[3] = a[3] * b;
return out;
}
/**
* Transforms the vec4 with a mat4.
*
* @param {vec4} out the receiving vector
* @param {ReadonlyVec4} a the vector to transform
* @param {ReadonlyMat4} m matrix to transform with
* @returns {vec4} out
*/
function transformMat4(out, a, m) {
var x = a[0],
y = a[1],
z = a[2],
w = a[3];
out[0] = m[0] * x + m[4] * y + m[8] * z + m[12] * w;
out[1] = m[1] * x + m[5] * y + m[9] * z + m[13] * w;
out[2] = m[2] * x + m[6] * y + m[10] * z + m[14] * w;
out[3] = m[3] * x + m[7] * y + m[11] * z + m[15] * w;
return out;
}
/**
* Perform some operation over an array of vec4s.
*
* @param {Array} a the array of vectors to iterate over
* @param {Number} stride Number of elements between the start of each vec4. If 0 assumes tightly packed
* @param {Number} offset Number of elements to skip at the beginning of the array
* @param {Number} count Number of vec4s to iterate over. If 0 iterates over entire array
* @param {Function} fn Function to call for each vector in the array
* @param {Object} [arg] additional argument to pass to fn
* @returns {Array} a
* @function
*/
(function () {
var vec = create$2();
return function (a, stride, offset, count, fn, arg) {
var i, l;
if (!stride) {
stride = 4;
}
if (!offset) {
offset = 0;
}
if (count) {
l = Math.min(count * stride + offset, a.length);
} else {
l = a.length;
}
for (i = offset; i < l; i += stride) {
vec[0] = a[i];
vec[1] = a[i + 1];
vec[2] = a[i + 2];
vec[3] = a[i + 3];
fn(vec, vec, arg);
a[i] = vec[0];
a[i + 1] = vec[1];
a[i + 2] = vec[2];
a[i + 3] = vec[3];
}
return a;
};
})();
function createMat4() {
return [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];
}
function transformVector(matrix, vector) {
var result = transformMat4([], vector, matrix);
scale$1(result, result, 1 / result[3]);
return result;
}
/**
* Inverts a mat4
*
* @param {mat4} out the receiving matrix
* @param {ReadonlyMat4} a the source matrix
* @returns {mat4} out
*/
function invert(out, a) {
var a00 = a[0],
a01 = a[1],
a02 = a[2],
a03 = a[3];
var a10 = a[4],
a11 = a[5],
a12 = a[6],
a13 = a[7];
var a20 = a[8],
a21 = a[9],
a22 = a[10],
a23 = a[11];
var a30 = a[12],
a31 = a[13],
a32 = a[14],
a33 = a[15];
var b00 = a00 * a11 - a01 * a10;
var b01 = a00 * a12 - a02 * a10;
var b02 = a00 * a13 - a03 * a10;
var b03 = a01 * a12 - a02 * a11;
var b04 = a01 * a13 - a03 * a11;
var b05 = a02 * a13 - a03 * a12;
var b06 = a20 * a31 - a21 * a30;
var b07 = a20 * a32 - a22 * a30;
var b08 = a20 * a33 - a23 * a30;
var b09 = a21 * a32 - a22 * a31;
var b10 = a21 * a33 - a23 * a31;
var b11 = a22 * a33 - a23 * a32; // Calculate the determinant
var det = b00 * b11 - b01 * b10 + b02 * b09 + b03 * b08 - b04 * b07 + b05 * b06;
if (!det) {
return null;
}
det = 1.0 / det;
out[0] = (a11 * b11 - a12 * b10 + a13 * b09) * det;
out[1] = (a02 * b10 - a01 * b11 - a03 * b09) * det;
out[2] = (a31 * b05 - a32 * b04 + a33 * b03) * det;
out[3] = (a22 * b04 - a21 * b05 - a23 * b03) * det;
out[4] = (a12 * b08 - a10 * b11 - a13 * b07) * det;
out[5] = (a00 * b11 - a02 * b08 + a03 * b07) * det;
out[6] = (a32 * b02 - a30 * b05 - a33 * b01) * det;
out[7] = (a20 * b05 - a22 * b02 + a23 * b01) * det;
out[8] = (a10 * b10 - a11 * b08 + a13 * b06) * det;
out[9] = (a01 * b08 - a00 * b10 - a03 * b06) * det;
out[10] = (a30 * b04 - a31 * b02 + a33 * b00) * det;
out[11] = (a21 * b02 - a20 * b04 - a23 * b00) * det;
out[12] = (a11 * b07 - a10 * b09 - a12 * b06) * det;
out[13] = (a00 * b09 - a01 * b07 + a02 * b06) * det;
out[14] = (a31 * b01 - a30 * b03 - a32 * b00) * det;
out[15] = (a20 * b03 - a21 * b01 + a22 * b00) * det;
return out;
}
/**
* Multiplies two mat4s
*
* @param {mat4} out the receiving matrix
* @param {ReadonlyMat4} a the first operand
* @param {ReadonlyMat4} b the second operand
* @returns {mat4} out
*/
function multiply(out, a, b) {
var a00 = a[0],
a01 = a[1],
a02 = a[2],
a03 = a[3];
var a10 = a[4],
a11 = a[5],
a12 = a[6],
a13 = a[7];
var a20 = a[8],
a21 = a[9],
a22 = a[10],
a23 = a[11];
var a30 = a[12],
a31 = a[13],
a32 = a[14],
a33 = a[15]; // Cache only the current line of the second matrix
var b0 = b[0],
b1 = b[1],
b2 = b[2],
b3 = b[3];
out[0] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
out[1] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
out[2] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
out[3] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
b0 = b[4];
b1 = b[5];
b2 = b[6];
b3 = b[7];
out[4] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
out[5] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
out[6] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
out[7] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
b0 = b[8];
b1 = b[9];
b2 = b[10];
b3 = b[11];
out[8] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
out[9] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
out[10] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
out[11] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
b0 = b[12];
b1 = b[13];
b2 = b[14];
b3 = b[15];
out[12] = b0 * a00 + b1 * a10 + b2 * a20 + b3 * a30;
out[13] = b0 * a01 + b1 * a11 + b2 * a21 + b3 * a31;
out[14] = b0 * a02 + b1 * a12 + b2 * a22 + b3 * a32;
out[15] = b0 * a03 + b1 * a13 + b2 * a23 + b3 * a33;
return out;
}
/**
* Translate a mat4 by the given vector
*
* @param {mat4} out the receiving matrix
* @param {ReadonlyMat4} a the matrix to translate
* @param {ReadonlyVec3} v vector to translate by
* @returns {mat4} out
*/
function translate(out, a, v) {
var x = v[0],
y = v[1],
z = v[2];
var a00, a01, a02, a03;
var a10, a11, a12, a13;
var a20, a21, a22, a23;
if (a === out) {
out[12] = a[0] * x + a[4] * y + a[8] * z + a[12];
out[13] = a[1] * x + a[5] * y + a[9] * z + a[13];
out[14] = a[2] * x + a[6] * y + a[10] * z + a[14];
out[15] = a[3] * x + a[7] * y + a[11] * z + a[15];
} else {
a00 = a[0];
a01 = a[1];
a02 = a[2];
a03 = a[3];
a10 = a[4];
a11 = a[5];
a12 = a[6];
a13 = a[7];
a20 = a[8];
a21 = a[9];
a22 = a[10];
a23 = a[11];
out[0] = a00;
out[1] = a01;
out[2] = a02;
out[3] = a03;
out[4] = a10;
out[5] = a11;
out[6] = a12;
out[7] = a13;
out[8] = a20;
out[9] = a21;
out[10] = a22;
out[11] = a23;
out[12] = a00 * x + a10 * y + a20 * z + a[12];
out[13] = a01 * x + a11 * y + a21 * z + a[13];
out[14] = a02 * x + a12 * y + a22 * z + a[14];
out[15] = a03 * x + a13 * y + a23 * z + a[15];
}
return out;
}
/**
* Scales the mat4 by the dimensions in the given vec3 not using vectorization
*
* @param {mat4} out the receiving matrix
* @param {ReadonlyMat4} a the matrix to scale
* @param {ReadonlyVec3} v the vec3 to scale the matrix by
* @returns {mat4} out
**/
function scale(out, a, v) {
var x = v[0],
y = v[1],
z = v[2];
out[0] = a[0] * x;
out[1] = a[1] * x;
out[2] = a[2] * x;
out[3] = a[3] * x;
out[4] = a[4] * y;
out[5] = a[5] * y;
out[6] = a[6] * y;
out[7] = a[7] * y;
out[8] = a[8] * z;
out[9] = a[9] * z;
out[10] = a[10] * z;
out[11] = a[11] * z;
out[12] = a[12];
out[13] = a[13];
out[14] = a[14];
out[15] = a[15];
return out;
}
/**
* Rotates a matrix by the given angle around the X axis
*
* @param {mat4} out the receiving matrix
* @param {ReadonlyMat4} a the matrix to rotate
* @param {Number} rad the angle to rotate the matrix by
* @returns {mat4} out
*/
function rotateX(out, a, rad) {
var s = Math.sin(rad);
var c = Math.cos(rad);
var a10 = a[4];
var a11 = a[5];
var a12 = a[6];
var a13 = a[7];
var a20 = a[8];
var a21 = a[9];
var a22 = a[10];
var a23 = a[11];
if (a !== out) {
// If the source and destination differ, copy the unchanged rows
out[0] = a[0];
out[1] = a[1];
out[2] = a[2];
out[3] = a[3];
out[12] = a[12];
out[13] = a[13];
out[14] = a[14];
out[15] = a[15];
} // Perform axis-specific matrix multiplication
out[4] = a10 * c + a20 * s;
out[5] = a11 * c + a21 * s;
out[6] = a12 * c + a22 * s;
out[7] = a13 * c + a23 * s;
out[8] = a20 * c - a10 * s;
out[9] = a21 * c - a11 * s;
out[10] = a22 * c - a12 * s;
out[11] = a23 * c - a13 * s;
return out;
}
/**
* Rotates a matrix by the given angle around the Z axis
*
* @param {mat4} out the receiving matrix
* @param {ReadonlyMat4} a the matrix to rotate
* @param {Number} rad the angle to rotate the matrix by
* @returns {mat4} out
*/
function rotateZ(out, a, rad) {
var s = Math.sin(rad);
var c = Math.cos(rad);
var a00 = a[0];
var a01 = a[1];
var a02 = a[2];
var a03 = a[3];
var a10 = a[4];
var a11 = a[5];
var a12 = a[6];
var a13 = a[7];
if (a !== out) {
// If the source and destination differ, copy the unchanged last row
out[8] = a[8];
out[9] = a[9];
out[10] = a[10];
out[11] = a[11];
out[12] = a[12];
out[13] = a[13];
out[14] = a[14];
out[15] = a[15];
} // Perform axis-specific matrix multiplication
out[0] = a00 * c + a10 * s;
out[1] = a01 * c + a11 * s;
out[2] = a02 * c + a12 * s;
out[3] = a03 * c + a13 * s;
out[4] = a10 * c - a00 * s;
out[5] = a11 * c - a01 * s;
out[6] = a12 * c - a02 * s;
out[7] = a13 * c - a03 * s;
return out;
}
/**
* Generates a perspective projection matrix with the given bounds.
* Passing null/undefined/no value for far will generate infinite projection matrix.
*
* @param {mat4} out mat4 frustum matrix will be written into
* @param {number} fovy Vertical field of view in radians
* @param {number} aspect Aspect ratio. typically viewport width/height
* @param {number} near Near bound of the frustum
* @param {number} far Far bound of the frustum, can be null or Infinity
* @returns {mat4} out
*/
function perspective(out, fovy, aspect, near, far) {
var f = 1.0 / Math.tan(fovy / 2),
nf;
out[0] = f / aspect;
out[1] = 0;
out[2] = 0;
out[3] = 0;
out[4] = 0;
out[5] = f;
out[6] = 0;
out[7] = 0;
out[8] = 0;
out[9] = 0;
out[11] = -1;
out[12] = 0;
out[13] = 0;
out[15] = 0;
if (far != null && far !== Infinity) {
nf = 1 / (near - far);
out[10] = (far + near) * nf;
out[14] = 2 * far * near * nf;
} else {
out[10] = -1;
out[14] = -2 * near;
}
return out;
}
/**
* Returns whether or not the matrices have approximately the same elements in the same position.
*
* @param {ReadonlyMat4} a The first matrix.
* @param {ReadonlyMat4} b The second matrix.
* @returns {Boolean} True if the matrices are equal, false otherwise.
*/
function equals(a, b) {
var a0 = a[0],
a1 = a[1],
a2 = a[2],
a3 = a[3];
var a4 = a[4],
a5 = a[5],
a6 = a[6],
a7 = a[7];
var a8 = a[8],
a9 = a[9],
a10 = a[10],
a11 = a[11];
var a12 = a[12],
a13 = a[13],
a14 = a[14],
a15 = a[15];
var b0 = b[0],
b1 = b[1],
b2 = b[2],
b3 = b[3];
var b4 = b[4],
b5 = b[5],
b6 = b[6],
b7 = b[7];
var b8 = b[8],
b9 = b[9],
b10 = b[10],
b11 = b[11];
var b12 = b[12],
b13 = b[13],
b14 = b[14],
b15 = b[15];
return Math.abs(a0 - b0) <= EPSILON * Math.max(1.0, Math.abs(a0), Math.abs(b0)) && Math.abs(a1 - b1) <= EPSILON * Math.max(1.0, Math.abs(a1), Math.abs(b1)) && Math.abs(a2 - b2) <= EPSILON * Math.max(1.0, Math.abs(a2), Math.abs(b2)) && Math.abs(a3 - b3) <= EPSILON * Math.max(1.0, Math.abs(a3), Math.abs(b3)) && Math.abs(a4 - b4) <= EPSILON * Math.max(1.0, Math.abs(a4), Math.abs(b4)) && Math.abs(a5 - b5) <= EPSILON * Math.max(1.0, Math.abs(a5), Math.abs(b5)) && Math.abs(a6 - b6) <= EPSILON * Math.max(1.0, Math.abs(a6), Math.abs(b6)) && Math.abs(a7 - b7) <= EPSILON * Math.max(1.0, Math.abs(a7), Math.abs(b7)) && Math.abs(a8 - b8) <= EPSILON * Math.max(1.0, Math.abs(a8), Math.abs(b8)) && Math.abs(a9 - b9) <= EPSILON * Math.max(1.0, Math.abs(a9), Math.abs(b9)) && Math.abs(a10 - b10) <= EPSILON * Math.max(1.0, Math.abs(a10), Math.abs(b10)) && Math.abs(a11 - b11) <= EPSILON * Math.max(1.0, Math.abs(a11), Math.abs(b11)) && Math.abs(a12 - b12) <= EPSILON * Math.max(1.0, Math.abs(a12), Math.abs(b12)) && Math.abs(a13 - b13) <= EPSILON * Math.max(1.0, Math.abs(a13), Math.abs(b13)) && Math.abs(a14 - b14) <= EPSILON * Math.max(1.0, Math.abs(a14), Math.abs(b14)) && Math.abs(a15 - b15) <= EPSILON * Math.max(1.0, Math.abs(a15), Math.abs(b15));
}
/**
* 2 Dimensional Vector
* @module vec2
*/
/**
* Creates a new, empty vec2
*
* @returns {vec2} a new 2D vector
*/
function create$1() {
var out = new ARRAY_TYPE(2);
if (ARRAY_TYPE != Float32Array) {
out[0] = 0;
out[1] = 0;
}
return out;
}
/**
* Adds two vec2's
*
* @param {vec2} out the receiving vector
* @param {ReadonlyVec2} a the first operand
* @param {ReadonlyVec2} b the second operand
* @returns {vec2} out
*/
function add(out, a, b) {
out[0] = a[0] + b[0];
out[1] = a[1] + b[1];
return out;
}
/**
* Negates the components of a vec2
*
* @param {vec2} out the receiving vector
* @param {ReadonlyVec2} a vector to negate
* @returns {vec2} out
*/
function negate$1(out, a) {
out[0] = -a[0];
out[1] = -a[1];
return out;
}
/**
* Performs a linear interpolation between two vec2's
*
* @param {vec2} out the receiving vector
* @param {ReadonlyVec2} a the first operand
* @param {ReadonlyVec2} b the second operand
* @param {Number} t interpolation amount, in the range [0-1], between the two inputs
* @returns {vec2} out
*/
function lerp(out, a, b, t) {
var ax = a[0],
ay = a[1];
out[0] = ax + t * (b[0] - ax);
out[1] = ay + t * (b[1] - ay);
return out;
}
/**
* Perform some operation over an array of vec2s.
*
* @param {Array} a the array of vectors to iterate over
* @param {Number} stride Number of elements between the start of each vec2. If 0 assumes tightly packed
* @param {Number} offset Number of elements to skip at the beginning of the array
* @param {Number} count Number of vec2s to iterate over. If 0 iterates over entire array
* @param {Function} fn Function to call for each vector in the array
* @param {Object} [arg] additional argument to pass to fn
* @returns {Array} a
* @function
*/
(function () {
var vec = create$1();
return function (a, stride, offset, count, fn, arg) {
var i, l;
if (!stride) {
stride = 2;
}
if (!offset) {
offset = 0;
}
if (count) {
l = Math.min(count * stride + offset, a.length);
} else {
l = a.length;
}
for (i = offset; i < l; i += stride) {
vec[0] = a[i];
vec[1] = a[i + 1];
fn(vec, vec, arg);
a[i] = vec[0];
a[i + 1] = vec[1];
}
return a;
};
})();
/**
* 3 Dimensional Vector
* @module vec3
*/
/**
* Creates a new, empty vec3
*
* @returns {vec3} a new 3D vector
*/
function create() {
var out = new ARRAY_TYPE(3);
if (ARRAY_TYPE != Float32Array) {
out[0] = 0;
out[1] = 0;
out[2] = 0;
}
return out;
}
/**
* Negates the components of a vec3
*
* @param {vec3} out the receiving vector
* @param {ReadonlyVec3} a vector to negate
* @returns {vec3} out
*/
function negate(out, a) {
out[0] = -a[0];
out[1] = -a[1];
out[2] = -a[2];
return out;
}
/**
* Perform some operation over an array of vec3s.
*
* @param {Array} a the array of vectors to iterate over
* @param {Number} stride Number of elements between the start of each vec3. If 0 assumes tightly packed
* @param {Number} offset Number of elements to skip at the beginning of the array
* @param {Number} count Number of vec3s to iterate over. If 0 iterates over entire array
* @param {Function} fn Function to call for each vector in the array
* @param {Object} [arg] additional argument to pass to fn
* @returns {Array} a
* @function
*/
(function () {
var vec = create();
return function (a, stride, offset, count, fn, arg) {
var i, l;
if (!stride) {
stride = 3;
}
if (!offset) {
offset = 0;
}
if (count) {
l = Math.min(count * stride + offset, a.length);
} else {
l = a.length;
}
for (i = offset; i < l; i += stride) {
vec[0] = a[i];
vec[1] = a[i + 1];
vec[2] = a[i + 2];
fn(vec, vec, arg);
a[i] = vec[0];
a[i + 1] = vec[1];
a[i + 2] = vec[2];
}
return a;
};
})();
function assert(condition, message) {
if (!condition) {
throw new Error(message || 'viewport-mercator-project: assertion failed.');
}
}
var PI$1 = Math.PI;
var PI_4 = PI$1 / 4;
var DEGREES_TO_RADIANS$1 = PI$1 / 180;
var RADIANS_TO_DEGREES = 180 / PI$1;
var TILE_SIZE$1 = 512;
var EARTH_CIRCUMFERENCE$1 = 40.03e6;
var DEFAULT_ALTITUDE = 1.5;
function zoomToScale$1(zoom) {
return Math.pow(2, zoom);
}
function lngLatToWorld(_ref, scale) {
var _ref2 = _slicedToArray(_ref, 2),
lng = _ref2[0],
lat = _ref2[1];
assert(Number.isFinite(lng) && Number.isFinite(scale));
assert(Number.isFinite(lat) && lat >= -90 && lat <= 90, 'invalid latitude');
scale *= TILE_SIZE$1;
var lambda2 = lng * DEGREES_TO_RADIANS$1;
var phi2 = lat * DEGREES_TO_RADIANS$1;
var x = scale * (lambda2 + PI$1) / (2 * PI$1);
var y = scale * (PI$1 - Math.log(Math.tan(PI_4 + phi2 * 0.5))) / (2 * PI$1);
return [x, y];
}
function worldToLngLat(_ref3, scale) {
var _ref4 = _slicedToArray(_ref3, 2),
x = _ref4[0],
y = _ref4[1];
scale *= TILE_SIZE$1;
var lambda2 = x / scale * (2 * PI$1) - PI$1;
var phi2 = 2 * (Math.atan(Math.exp(PI$1 - y / scale * (2 * PI$1))) - PI_4);
return [lambda2 * RADIANS_TO_DEGREES, phi2 * RADIANS_TO_DEGREES];
}
function getDistanceScales$1(_ref6) {
var latitude = _ref6.latitude,
longitude = _ref6.longitude,
zoom = _ref6.zoom,
scale = _ref6.scale,
_ref6$highPrecision = _ref6.highPrecision,
highPrecision = _ref6$highPrecision === void 0 ? false : _ref6$highPrecision;
scale = scale !== undefined ? scale : zoomToScale$1(zoom);
assert(Number.isFinite(latitude) && Number.isFinite(longitude) && Number.isFinite(scale));
var result = {};
var worldSize = TILE_SIZE$1 * scale;
var latCosine = Math.cos(latitude * DEGREES_TO_RADIANS$1);
var pixelsPerDegreeX = worldSize / 360;
var pixelsPerDegreeY = pixelsPerDegreeX / latCosine;
var altPixelsPerMeter = worldSize / EARTH_CIRCUMFERENCE$1 / latCosine;
result.pixelsPerMeter = [altPixelsPerMeter, -altPixelsPerMeter, altPixelsPerMeter];
result.metersPerPixel = [1 / altPixelsPerMeter, -1 / altPixelsPerMeter, 1 / altPixelsPerMeter];
result.pixelsPerDegree = [pixelsPerDegreeX, -pixelsPerDegreeY, altPixelsPerMeter];
result.degreesPerPixel = [1 / pixelsPerDegreeX, -1 / pixelsPerDegreeY, 1 / altPixelsPerMeter];
if (highPrecision) {
var latCosine2 = DEGREES_TO_RADIANS$1 * Math.tan(latitude * DEGREES_TO_RADIANS$1) / latCosine;
var pixelsPerDegreeY2 = pixelsPerDegreeX * latCosine2 / 2;
var altPixelsPerDegree2 = worldSize / EARTH_CIRCUMFERENCE$1 * latCosine2;
var altPixelsPerMeter2 = altPixelsPerDegree2 / pixelsPerDegreeY * altPixelsPerMeter;
result.pixelsPerDegree2 = [0, -pixelsPerDegreeY2, altPixelsPerDegree2];
result.pixelsPerMeter2 = [altPixelsPerMeter2, 0, altPixelsPerMeter2];
}
return result;
}
function getViewMatrix(_ref7) {
var height = _ref7.height,
pitch = _ref7.pitch,
bearing = _ref7.bearing,
altitude = _ref7.altitude,
_ref7$center = _ref7.center,
center = _ref7$center === void 0 ? null : _ref7$center,
_ref7$flipY = _ref7.flipY,
flipY = _ref7$flipY === void 0 ? false : _ref7$flipY;
var vm = createMat4();
translate(vm, vm, [0, 0, -altitude]);
scale(vm, vm, [1, 1, 1 / height]);
rotateX(vm, vm, -pitch * DEGREES_TO_RADIANS$1);
rotateZ(vm, vm, bearing * DEGREES_TO_RADIANS$1);
if (flipY) {
scale(vm, vm, [1, -1, 1]);
}
if (center) {
translate(vm, vm, negate([], center));
}
return vm;
}
function getProjectionParameters(_ref8) {
var width = _ref8.width,
height = _ref8.height,
_ref8$altitude = _ref8.altitude,
altitude = _ref8$altitude === void 0 ? DEFAULT_ALTITUDE : _ref8$altitude,
_ref8$pitch = _ref8.pitch,
pitch = _ref8$pitch === void 0 ? 0 : _ref8$pitch,
_ref8$nearZMultiplier = _ref8.nearZMultiplier,
nearZMultiplier = _ref8$nearZMultiplier === void 0 ? 1 : _ref8$nearZMultiplier,
_ref8$farZMultiplier = _ref8.farZMultiplier,
farZMultiplier = _ref8$farZMultiplier === void 0 ? 1 : _ref8$farZMultiplier;
var pitchRadians = pitch * DEGREES_TO_RADIANS$1;
var halfFov = Math.atan(0.5 / altitude);
var topHalfSurfaceDistance = Math.sin(halfFov) * altitude / Math.sin(Math.PI / 2 - pitchRadians - halfFov);
var farZ = Math.cos(Math.PI / 2 - pitchRadians) * topHalfSurfaceDistance + altitude;
return {
fov: 2 * Math.atan(height / 2 / altitude),
aspect: width / height,
focalDistance: altitude,
near: nearZMultiplier,
far: farZ * farZMultiplier
};
}
function getProjectionMatrix(_ref9) {
var width = _ref9.width,
height = _ref9.height,
pitch = _ref9.pitch,
altitude = _ref9.altitude,
nearZMultiplier = _ref9.nearZMultiplier,
farZMultiplier = _ref9.farZMultiplier;
var _getProjectionParamet = getProjectionParameters({
width: width,
height: height,
altitude: altitude,
pitch: pitch,
nearZMultiplier: nearZMultiplier,
farZMultiplier: farZMultiplier
}),
fov = _getProjectionParamet.fov,
aspect = _getProjectionParamet.aspect,
near = _getProjectionParamet.near,
far = _getProjectionParamet.far;
var projectionMatrix = perspective([], fov, aspect, near, far);
return projectionMatrix;
}
function worldToPixels(xyz, pixelProjectionMatrix) {
var _xyz2 = _slicedToArray(xyz, 3),
x = _xyz2[0],
y = _xyz2[1],
_xyz2$ = _xyz2[2],
z = _xyz2$ === void 0 ? 0 : _xyz2$;
assert(Number.isFinite(x) && Number.isFinite(y) && Number.isFinite(z));
return transformVector(pixelProjectionMatrix, [x, y, z, 1]);
}
function pixelsToWorld(xyz, pixelUnprojectionMatrix) {
var targetZ = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
var _xyz3 = _slicedToArray(xyz, 3),
x = _xyz3[0],
y = _xyz3[1],
z = _xyz3[2];
assert(Number.isFinite(x) && Number.isFinite(y), 'invalid pixel coordinate');
if (Number.isFinite(z)) {
var coord = transformVector(pixelUnprojectionMatrix, [x, y, z, 1]);
return coord;
}
var coord0 = transformVector(pixelUnprojectionMatrix, [x, y, 0, 1]);
var coord1 = transformVector(pixelUnprojectionMatrix, [x, y, 1, 1]);
var z0 = coord0[2];
var z1 = coord1[2];
var t = z0 === z1 ? 0 : ((targetZ || 0) - z0) / (z1 - z0);
return lerp([], coord0, coord1, t);
}
var IDENTITY = createMat4();
var Viewport = function () {
function Viewport() {
var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
width = _ref.width,
height = _ref.height,
_ref$viewMatrix = _ref.viewMatrix,
viewMatrix = _ref$viewMatrix === void 0 ? IDENTITY : _ref$viewMatrix,
_ref$projectionMatrix = _ref.projectionMatrix,
projectionMatrix = _ref$projectionMatrix === void 0 ? IDENTITY : _ref$projectionMatrix;
_classCallCheck(this, Viewport);
this.width = width || 1;
this.height = height || 1;
this.scale = 1;
this.pixelsPerMeter = 1;
this.viewMatrix = viewMatrix;
this.projectionMatrix = projectionMatrix;
var vpm = createMat4();
multiply(vpm, vpm, this.projectionMatrix);
multiply(vpm, vpm, this.viewMatrix);
this.viewProjectionMatrix = vpm;
var m = createMat4();
scale(m, m, [this.width / 2, -this.height / 2, 1]);
translate(m, m, [1, -1, 0]);
multiply(m, m, this.viewProjectionMatrix);
var mInverse = invert(createMat4(), m);
if (!mInverse) {
throw new Error('Pixel project matrix not invertible');
}
this.pixelProjectionMatrix = m;
this.pixelUnprojectionMatrix = mInverse;
this.equals = this.equals.bind(this);
this.project = this.project.bind(this);
this.unproject = this.unproject.bind(this);
this.projectPosition = this.projectPosition.bind(this);
this.unprojectPosition = this.unprojectPosition.bind(this);
this.projectFlat = this.projectFlat.bind(this);
this.unprojectFlat = this.unprojectFlat.bind(this);
}
_createClass(Viewport, [{
key: "equals",
value: function equals$1(viewport) {
if (!(viewport instanceof Viewport)) {
return false;
}
return viewport.width === this.width && viewport.height === this.height && equals(viewport.projectionMatrix, this.projectionMatrix) && equals(viewport.viewMatrix, this.viewMatrix);
}
}, {
key: "project",
value: function project(xyz) {
var _ref2 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
_ref2$topLeft = _ref2.topLeft,
topLeft = _ref2$topLeft === void 0 ? true : _ref2$topLeft;
var worldPosition = this.projectPosition(xyz);
var coord = worldToPixels(worldPosition, this.pixelProjectionMatrix);
var _coord = _slicedToArray(coord, 2),
x = _coord[0],
y = _coord[1];
var y2 = topLeft ? y : this.height - y;
return xyz.length === 2 ? [x, y2] : [x, y2, coord[2]];
}
}, {
key: "unproject",
value: function unproject(xyz) {
var _ref3 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
_ref3$topLeft = _ref3.topLeft,
topLeft = _ref3$topLeft === void 0 ? true : _ref3$topLeft,
targetZ = _ref3.targetZ;
var _xyz = _slicedToArray(xyz, 3),
x = _xyz[0],
y = _xyz[1],
z = _xyz[2];
var y2 = topLeft ? y : this.height - y;
var targetZWorld = targetZ && targetZ * this.pixelsPerMeter;
var coord = pixelsToWorld([x, y2, z], this.pixelUnprojectionMatrix, targetZWorld);
var _this$unprojectPositi = this.unprojectPosition(coord),
_this$unprojectPositi2 = _slicedToArray(_this$unprojectPositi, 3),
X = _this$unprojectPositi2[0],
Y = _this$unprojectPositi2[1],
Z = _this$unprojectPositi2[2];
if (Number.isFinite(z)) {
return [X, Y, Z];
}
return Number.isFinite(targetZ) ? [X, Y, targetZ] : [X, Y];
}
}, {
key: "projectPosition",
value: function projectPosition(xyz) {
var _this$projectFlat = this.projectFlat(xyz),
_this$projectFlat2 = _slicedToArray(_this$projectFlat, 2),
X = _this$projectFlat2[0],
Y = _this$projectFlat2[1];
var Z = (xyz[2] || 0) * this.pixelsPerMeter;
return [X, Y, Z];
}
}, {
key: "unprojectPosition",
value: function unprojectPosition(xyz) {
var _this$unprojectFlat = this.unprojectFlat(xyz),
_this$unprojectFlat2 = _slicedToArray(_this$unprojectFlat, 2),
X = _this$unprojectFlat2[0],
Y = _this$unprojectFlat2[1];
var Z = (xyz[2] || 0) / this.pixelsPerMeter;
return [X, Y, Z];
}
}, {
key: "projectFlat",
value: function projectFlat(xyz) {
arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.scale;
return xyz;
}
}, {
key: "unprojectFlat",
value: function unprojectFlat(xyz) {
arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.scale;
return xyz;
}
}]);
return Viewport;
}();
function fitBounds(_ref) {
var width = _ref.width,
height = _ref.height,
bounds = _ref.bounds,
_ref$minExtent = _ref.minExtent,
minExtent = _ref$minExtent === void 0 ? 0 : _ref$minExtent,
_ref$maxZoom = _ref.maxZoom,
maxZoom = _ref$maxZoom === void 0 ? 24 : _ref$maxZoom,
_ref$padding = _ref.padding,
padding = _ref$padding === void 0 ? 0 : _ref$padding,
_ref$offset = _ref.offset,
offset = _ref$offset === void 0 ? [0, 0] : _ref$offset;
var _bounds = _slicedToArray(bounds, 2),
_bounds$ = _slicedToArray(_bounds[0], 2),
west = _bounds$[0],
south = _bounds$[1],
_bounds$2 = _slicedToArray(_bounds[1], 2),
east = _bounds$2[0],
north = _bounds$2[1];
if (Number.isFinite(padding)) {
var p = padding;
padding = {
top: p,
bottom: p,
left: p,
right: p
};
} else {
assert(Number.isFinite(padding.top) && Number.isFinite(padding.bottom) && Number.isFinite(padding.left) && Number.isFinite(padding.right));
}
var viewport = new WebMercatorViewport({
width: width,
height: height,
longitude: 0,
latitude: 0,
zoom: 0
});
var nw = viewport.project([west, north]);
var se = viewport.project([east, south]);
var size = [Math.max(Math.abs(se[0] - nw[0]), minExtent), Math.max(Math.abs(se[1] - nw[1]), minExtent)];
var targetSize = [width - padding.left - padding.right - Math.abs(offset[0]) * 2, height - padding.top - padding.bottom - Math.abs(offset[1]) * 2];
assert(targetSize[0] > 0 && targetSize[1] > 0);
var scaleX = targetSize[0] / size[0];
var scaleY = targetSize[1] / size[1];
var offsetX = (padding.right - padding.left) / 2 / scaleX;
var offsetY = (padding.bottom - padding.top) / 2 / scaleY;
var center = [(se[0] + nw[0]) / 2 + offsetX, (se[1] + nw[1]) / 2 + offsetY];
var centerLngLat = viewport.unproject(center);
var zoom = viewport.zoom + Math.log2(Math.abs(Math.min(scaleX, scaleY)));
return {
longitude: centerLngLat[0],
latitude: centerLngLat[1],
zoom: Math.min(zoom, maxZoom)
};
}
var WebMercatorViewport = function (_Viewport) {
_inherits(WebMercatorViewport, _Viewport);
function WebMercatorViewport() {
var _this;
var _ref = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {},
width = _ref.width,
height = _ref.height,
_ref$latitude = _ref.latitude,
latitude = _ref$latitude === void 0 ? 0 : _ref$latitude,
_ref$longitude = _ref.longitude,
longitude = _ref$longitude === void 0 ? 0 : _ref$longitude,
_ref$zoom = _ref.zoom,
zoom = _ref$zoom === void 0 ? 0 : _ref$zoom,
_ref$pitch = _ref.pitch,
pitch = _ref$pitch === void 0 ? 0 : _ref$pitch,
_ref$bearing = _ref.bearing,
bearing = _ref$bearing === void 0 ? 0 : _ref$bearing,
_ref$altitude = _ref.altitude,
altitude = _ref$altitude === void 0 ? 1.5 : _ref$altitude,
nearZMultiplier = _ref.nearZMultiplier,
farZMultiplier = _ref.farZMultiplier;
_classCallCheck(this, WebMercatorViewport);
width = width || 1;
height = height || 1;
var scale = zoomToScale$1(zoom);
altitude = Math.max(0.75, altitude);
var center = lngLatToWorld([longitude, latitude], scale);
center[2] = 0;
var projectionMatrix = getProjectionMatrix({
width: width,
height: height,
pitch: pitch,
bearing: bearing,
altitude: altitude,
nearZMultiplier: nearZMultiplier || 1 / height,
farZMultiplier: farZMultiplier || 1.01
});
var viewMatrix = getViewMatrix({
height: height,
center: center,
pitch: pitch,
bearing: bearing,
altitude: altitude,
flipY: true
});
_this = _possibleConstructorReturn(this, _getPrototypeOf(WebMercatorViewport).call(this, {
width: width,
height: height,
viewMatrix: viewMatrix,
projectionMatrix: projectionMatrix
}));
_this.latitude = latitude;
_this.longitude = longitude;
_this.zoom = zoom;
_this.pitch = pitch;
_this.bearing = bearing;
_this.altitude = altitude;
_this.scale = scale;
_this.center = center;
_this.pixelsPerMeter = getDistanceScales$1(_assertThisInitialized(_assertThisInitialized(_this))).pixelsPerMeter[2];
Object.freeze(_assertThisInitialized(_assertThisInitialized(_this)));
return _this;
}
_createClass(WebMercatorViewport, [{
key: "projectFlat",
value: function projectFlat(lngLat) {
var scale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.scale;
return lngLatToWorld(lngLat, scale);
}
}, {
key: "unprojectFlat",
value: function unprojectFlat(xy) {
var scale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : this.scale;
return worldToLngLat(xy, scale);
}
}, {
key: "getMapCenterByLngLatPosition",
value: function getMapCenterByLngLatPosition(_ref2) {
var lngLat = _ref2.lngLat,
pos = _ref2.pos;
var fromLocation = pixelsToWorld(pos, this.pixelUnprojectionMatrix);
var toLocation = lngLatToWorld(lngLat, this.scale);
var translate = add([], toLocation, negate$1([], fromLocation));
var newCenter = add([], this.center, translate);
return worldToLngLat(newCenter, this.scale);
}
}, {
key: "getLocationAtPoint",
value: function getLocationAtPoint(_ref3) {
var lngLat = _ref3.lngLat,
pos = _ref3.pos;
return this.getMapCenterByLngLatPosition({
lngLat: lngLat,
pos: pos
});
}
}, {
key: "fitBounds",
value: function fitBounds$1(bounds) {
var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
var width = this.width,
height = this.height;
var _fitBounds2 = fitBounds(Object.assign({
width: width,
height: height,
bounds: bounds
}, options)),
longitude = _fitBounds2.longitude,
latitude = _fitBounds2.latitude,
zoom = _fitBounds2.zoom;
return new WebMercatorViewport({
width: width,
height: height,
longitude: longitude,
latitude: latitude,
zoom: zoom
});
}
}]);
return WebMercatorViewport;
}(Viewport);
/**
* borrow from
* https://github.com/uber-common/viewport-mercator-project/blob/master/src/web-mercator-utils.js
*/
const PI = Math.PI;
const DEGREES_TO_RADIANS = PI / 180;
// const RADIANS_TO_DEGREES = 180 / PI;
const TILE_SIZE = 512;
// Average circumference (40075 km equatorial, 40007 km meridional)
const EARTH_CIRCUMFERENCE = 40.03e6;
// Mapbox default altitude
// const DEFAULT_ALTITUDE = 1.5;
function zoomToScale(zoom) {
return Math.pow(2, zoom);
}
/**
* Calculate distance scales in meters around current lat/lon, both for
* degrees and pixels.
* In mercator projection mode, the distance scales vary significantly
* with latitude.
*/
function getDistanceScales(options) {
let {
latitude = 0, zoom = 1, scale, highPrecision = false
} = options;
// Calculate scale from zoom if not provided
scale = scale !== undefined ? scale : zoomToScale(zoom);
const result = {};
const worldSize = TILE_SIZE * scale;
const latCosine = Math.cos(latitude * DEGREES_TO_RADIANS);
/**
* Number of pixels occupied by one degree longitude around current lat/lon:
pixelsPerDegreeX = d(lngLatToWorld([lng, lat])[0])/d(lng)
= scale * TILE_SIZE * DEGREES_TO_RADIANS / (2 * PI)
pixelsPerDegreeY = d(lngLatToWorld([lng, lat])[1])/d(lat)
= -scale * TILE_SIZE * DEGREES_TO_RADIANS / cos(lat * DEGREES_TO_RADIANS) / (2 * PI)
*/
const pixelsPerDegreeX = worldSize / 360;
const pixelsPerDegreeY = pixelsPerDegreeX / latCosine;
/**
* Number of pixels occupied by one meter around current lat/lon:
*/
const altPixelsPerMeter = worldSize / EARTH_CIRCUMFERENCE / latCosine;
/**
* LngLat: longitude -> east and latitude -> north (bottom left)
* UTM meter offset: x -> east and y -> north (bottom left)
* World space: x -> east and y -> south (top left)
*
* Y needs to be flipped when converting delta degree/meter to delta pixels
*/
result.pixelsPerMeter = [altPixelsPerMeter, -altPixelsPerMeter, altPixelsPerMeter];
result.metersPerPixel = [1 / altPixelsPerMeter, -1 / altPixelsPerMeter, 1 / altPixelsPerMeter];
result.pixelsPerDegree = [pixelsPerDegreeX, -pixelsPerDegreeY, altPixelsPerMeter];
result.degreesPerPixel = [1 / pixelsPerDegreeX, -1 / pixelsPerDegreeY, 1 / altPixelsPerMeter];
/**
* Taylor series 2nd order for 1/latCosine
f'(a) * (x - a)
= d(1/cos(lat * DEGREES_TO_RADIANS))/d(lat) * dLat
= DEGREES_TO_RADIANS * tan(lat * DEGREES_TO_RADIANS) / cos(lat * DEGREES_TO_RADIANS) * dLat
*/
if (highPrecision) {
const latCosine2 = DEGREES_TO_RADIANS * Math.tan(latitude * DEGREES_TO_RADIANS) / latCosine;
const pixelsPerDegreeY2 = pixelsPerDegreeX * latCosine2 / 2;
const altPixelsPerDegree2 = worldSize / EARTH_CIRCUMFERENCE * latCosine2;
const altPixelsPerMeter2 = altPixelsPerDegree2 / pixelsPerDegreeY * altPixelsPerMeter;
result.pixelsPerDegree2 = [0, -pixelsPerDegreeY2, altPixelsPerDegree2];
result.pixelsPerMeter2 = [altPixelsPerMeter2, 0, altPixelsPerMeter2];
}
// Main results, used for converting meters to latlng deltas and scaling offsets
return result;
}
return class {
constructor(options) {
this.id = options.id;
this.type = "custom";
this.renderingMode = '2d';
this.url = options.url;
if(!!!(options.tileType)){
let tiles = options.subdomains.map(i => options.url.replaceAll('{s}',i));
!(tiles.length) && (tiles = [options.url]);
this.layerParams = {
source:{"type": "raster", tiles, "tileSize": 256},
layer:{"type": "raster", "source": options.id, "minzoom": options.minZoom || 0, "maxzoom": options.maxZoom || 18}
}
}
this.options = {
//服务器编号
subdomains: null,
minZoom: 3,
maxZoom: 18,
tileType: 'xyz' //bd09,xyz
};
setOptions(this, options); //合并属性
//着色器程序
this.program;
//存放当前显示的瓦片
this.showTiles = [];
//存放所有加载过的瓦片
this.tileCache = {};
//存放瓦片号对应的经纬度
this.gridCache = {};
//记录渲染时的变换矩阵。
//如果瓦片因为网速慢，在渲染完成后才加载过来，可以使用这个矩阵主动更新渲染
this.matrix;
this.map;
//记录当前图层是否在显示
this.isLayerShow;
this.transformBaidu = new TransformClassBaidu();
}
onAdd(map, gl) {
this.map = map;
// 着色器程序参考：https://github.com/xiaoiver/custom-mapbox-layer/blob/master/src/shaders/project.glsl
var vertexSource = "" + "uniform mat4 u_matrix;" + "attribute vec2 a_pos;" + "attribute vec2 a_TextCoord;" + "varying vec2 v_TextCoord;" + "const float TILE_SIZE = 512.0;" + "const float PI = 3.1415926536;" + "const float WORLD_SCALE = TILE_SIZE / (PI * 2.0);" + "uniform float u_project_scale;" + "uniform bool u_is_offset;" + "uniform vec3 u_pixels_per_degree;" + "uniform vec3 u_pixels_per_degree2;" + "uniform vec3 u_pixels_per_meter;" + "uniform vec2 u_viewport_center;" + "uniform vec4 u_viewport_center_projection;" + "uniform vec2 u_viewport_size;" + "float project_scale(float meters) {" + " return meters * u_pixels_per_meter.z;" + "}" + "vec3 project_scale(vec3 position) {" + " return position * u_pixels_per_meter;" + "}" + "vec2 project_mercator(vec2 lnglat) {" + " float x = lnglat.x;" + " return vec2(" + " radians(x) + PI, PI - log(tan(PI * 0.25 + radians(lnglat.y) * 0.5))" + " );" + "}" + "vec4 project_offset(vec4 offset) {" + " float dy = offset.y;" + " dy = clamp(dy, -1., 1.);" + " vec3 pixels_per_unit = u_pixels_per_degree + u_pixels_per_degree2 * dy;" + " return vec4(offset.xyz * pixels_per_unit, offset.w);" + "}" + "vec4 project_position(vec4 position) {" + " if (u_is_offset) {" + " float X = position.x - u_viewport_center.x;" + " float Y = position.y - u_viewport_center.y;" + " return project_offset(vec4(X, Y, position.z, position.w));" + " }" + " else {" + " return vec4(" + " project_mercator(position.xy) * WORLD_SCALE * u_project_scale, project_scale(position.z), position.w" + " );" + " }" + "}" + "vec4 project_to_clipping_space(vec3 position) {" + " vec4 project_pos = project_position(vec4(position, 1.0));" + " return u_matrix * project_pos + u_viewport_center_projection;" + "}" + "void main() {" + " vec4 project_pos = project_position(vec4(a_pos, 0.0, 1.0));" + " gl_Position = u_matrix * project_pos + u_viewport_center_projection;" + " v_TextCoord = a_TextCoord;" + "}";
var fragmentSource = "" + "precision mediump float;" + "uniform sampler2D u_Sampler; " + "varying vec2 v_TextCoord; " + "void main() {" + " gl_FragColor = texture2D(u_Sampler, v_TextCoord);" +
// " gl_FragColor = vec4(1.0, 0.0, 0.0, 0.5);" +
"}";
//初始化顶点着色器
var vertexShader = gl.createShader(gl.VERTEX_SHADER);
gl.shaderSource(vertexShader, vertexSource);
gl.compileShader(vertexShader);
//初始化片元着色器
var fragmentShader = gl.createShader(gl.FRAGMENT_SHADER);
gl.shaderSource(fragmentShader, fragmentSource);
gl.compileShader(fragmentShader);
//初始化着色器程序
this.program = gl.createProgram();
gl.attachShader(this.program, vertexShader);
gl.attachShader(this.program, fragmentShader);
gl.linkProgram(this.program);
//获取顶点位置变量
this.a_Pos = gl.getAttribLocation(this.program, "a_pos");
this.a_TextCoord = gl.getAttribLocation(this.program, 'a_TextCoord');
this.isLayerShow = true;
map.on('move', () => {
if (this.isLayerShow) this.update(gl, map);
});
this.update(gl, map);
}
update(gl, map) {
var center = map.getCenter();
var zoom;
var bounds = map.getBounds();
var minTile, maxTile;
if (this.options.tileType === 'xyz') {
zoom = parseInt(map.getZoom() + 1.4); //解决瓦片上文字偏大的问题
//把当前显示范围做偏移，后面加载瓦片时会再偏移回来
//如果不这样做的话，大比例尺时，瓦片偏移后，屏幕边缘会有空白区域
var northWest = gcj02_To_gps84(bounds.getNorthWest());
var southEast = gcj02_To_gps84(bounds.getSouthEast());
//算出当前范围的瓦片编号
minTile = lonLatToTileNumbers(northWest.lng, northWest.lat, zoom);
maxTile = lonLatToTileNumbers(southEast.lng, southEast.lat, zoom);
} else if (this.options.tileType === 'bd09') {
zoom = parseInt(map.getZoom() + 1.8); //解决瓦片上文字偏大的问题
var southWest = gps84_To_bd09(bounds.getSouthWest());
var northEast = gps84_To_bd09(bounds.getNorthEast());
minTile = this.transformBaidu.lnglatToTile(southWest.lng, southWest.lat, zoom);
maxTile = this.transformBaidu.lnglatToTile(northEast.lng, northEast.lat, zoom);
}
var currentTiles = [];
for (var x = minTile[0]; x <= maxTile[0]; x++) {
for (var y = minTile[1]; y <= maxTile[1]; y++) {
var xyz = {
x: x,
y: y,
z: zoom
};
currentTiles.push(xyz);
//把瓦片号对应的经纬度缓存起来，
//存起来是因为贴纹理时需要瓦片4个角的经纬度，这样可以避免重复计算
//行和列向外多计算一个瓦片数，这样保证瓦片4个角都有经纬度可以取到
this.addGridCache(xyz, 0, 0);
if (x === maxTile[0]) this.addGridCache(xyz, 1, 0);
if (y === maxTile[1]) this.addGridCache(xyz, 0, 1);
if (x === maxTile[0] && y === maxTile[1]) this.addGridCache(xyz, 1, 1);
}
}
//瓦片设置为从中间向周边的排序
if (this.options.tileType === 'xyz') var centerTile = lonLatToTileNumbers(center.lng, center.lat, zoom); //计算中心点所在的瓦片号
else if (this.options.tileType === 'bd09') centerTile = this.transformBaidu.lnglatToTile(center.lng, center.lat, zoom);
currentTiles.sort((a, b) => {
return this.tileDistance(a, centerTile) - this.tileDistance(b, centerTile);
});
//加载瓦片
this.showTiles = [];
for (var xyz of currentTiles) {
//走缓存或新加载
if (this.tileCache[this.createTileKey(xyz)]) {
this.showTiles.push(this.tileCache[this.createTileKey(xyz)]);
} else {
var tile = this.createTile(gl, xyz);
this.showTiles.push(tile);
this.tileCache[this.createTileKey(xyz)] = tile;
}
}
}
//缓存瓦片号对应的经纬度
addGridCache(xyz, xPlus, yPlus) {
var key = this.createTileKey(xyz.x + xPlus, xyz.y + yPlus, xyz.z);
if (!this.gridCache[key]) {
if (this.options.tileType === 'xyz') this.gridCache[key] = gps84_To_gcj02(tileNumbersToLonLat(xyz.x + xPlus, xyz.y + yPlus, xyz.z));else if (this.options.tileType === 'bd09') this.gridCache[key] = bd09_To_gps84(this.transformBaidu.pixelToLnglat(0, 0, xyz.x + xPlus, xyz.y + yPlus, xyz.z));
}
}
//计算两个瓦片编号的距离
tileDistance(tile1, tile2) {
//计算直角三角形斜边长度，c（斜边）=√（a²+b²）。（a，b为两直角边）
return Math.sqrt(Math.pow(tile1.x - tile2[0], 2) + Math.pow(tile1.y - tile2[1], 2));
}
//创建瓦片id
createTileKey(xyz, y, z) {
if (xyz instanceof Object) {
return xyz.z + '/' + xyz.x + '/' + xyz.y;
} else {
var x = xyz;
return z + '/' + x + '/' + y;
}
}
//创建瓦片
createTile(gl, xyz) {
//替换请求地址中的变量
var _url = template(this.url, {
s: this.options.subdomains[Math.abs(xyz.x + xyz.y) % this.options.subdomains.length],
x: xyz.x,
y: xyz.y,
z: xyz.z
});
var tile = {
xyz: xyz
};
//瓦片编号转经纬度，并进行偏移
var leftTop, rightTop, leftBottom, rightBottom;
if (this.options.tileType === 'xyz') {
leftTop = this.gridCache[this.createTileKey(xyz)];
rightTop = this.gridCache[this.createTileKey(xyz.x + 1, xyz.y, xyz.z)];
leftBottom = this.gridCache[this.createTileKey(xyz.x, xyz.y + 1, xyz.z)];
rightBottom = this.gridCache[this.createTileKey(xyz.x + 1, xyz.y + 1, xyz.z)];
} else if (this.options.tileType === 'bd09') {
leftTop = this.gridCache[this.createTileKey(xyz.x, xyz.y + 1, xyz.z)];
rightTop = this.gridCache[this.createTileKey(xyz.x + 1, xyz.y + 1, xyz.z)];
leftBottom = this.gridCache[this.createTileKey(xyz)];
rightBottom = this.gridCache[this.createTileKey(xyz.x + 1, xyz.y, xyz.z)];
}
//顶点坐标+纹理坐标
var attrData = new Float32Array([leftTop.lng, leftTop.lat, 0.0, 1.0, leftBottom.lng, leftBottom.lat, 0.0, 0.0, rightTop.lng, rightTop.lat, 1.0, 1.0, rightBottom.lng, rightBottom.lat, 1.0, 0.0]);
// var attrData = new Float32Array([
// 116.38967958133532, 39.90811009556515, 0.0, 1.0,
// 116.38967958133532, 39.90294980726742, 0.0, 0.0,
// 116.39486013141436, 39.90811009556515, 1.0, 1.0,
// 116.39486013141436, 39.90294980726742, 1.0, 0.0
// ])
var FSIZE = attrData.BYTES_PER_ELEMENT;
//创建缓冲区并传入数据
var buffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
gl.bufferData(gl.ARRAY_BUFFER, attrData, gl.STATIC_DRAW);
tile.buffer = buffer;
//从缓冲区中获取顶点数据的参数
tile.PosParam = {
size: 2,
stride: FSIZE * 4,
offset: 0
//从缓冲区中获取纹理数据的参数
};tile.TextCoordParam = {
size: 2,
stride: FSIZE * 4,
offset: FSIZE * 2
//加载瓦片
};var img = new Image();
img.onload = () => {
// 创建纹理对象
tile.texture = gl.createTexture();
//向target绑定纹理对象
gl.bindTexture(gl.TEXTURE_2D, tile.texture);
//对纹理进行Y轴反转
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 1);
//配置纹理图像
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img);
tile.isLoad = true;
this.map.triggerRepaint(); //主动让地图重绘
};
img.crossOrigin = true;
img.src = _url;
return tile;
}
//渲染
render(gl, matrix) {
if (this.map.getZoom() < this.options.minZoom || this.map.getZoom() > this.options.maxZoom) return;
//记录变换矩阵，用于瓦片加载后主动绘制
this.matrix = matrix;
//应用着色程序
//必须写到这里，不能写到onAdd中，不然gl中的着色程序可能不是上面写的，会导致下面的变量获取不到
gl.useProgram(this.program);
for (var tile of this.showTiles) {
if (!tile.isLoad) continue;
//向target绑定纹理对象
gl.bindTexture(gl.TEXTURE_2D, tile.texture);
//开启0号纹理单元
gl.activeTexture(gl.TEXTURE0);
//配置纹理参数
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.MIRRORED_REPEAT);
// 获取纹理的存储位置
var u_Sampler = gl.getUniformLocation(this.program, 'u_Sampler');
//将0号纹理传递给着色器
gl.uniform1i(u_Sampler, 0);
gl.bindBuffer(gl.ARRAY_BUFFER, tile.buffer);
//设置从缓冲区获取顶点数据的规则
gl.vertexAttribPointer(this.a_Pos, tile.PosParam.size, gl.FLOAT, false, tile.PosParam.stride, tile.PosParam.offset);
gl.vertexAttribPointer(this.a_TextCoord, tile.TextCoordParam.size, gl.FLOAT, false, tile.TextCoordParam.stride, tile.TextCoordParam.offset);
//激活顶点数据缓冲区
gl.enableVertexAttribArray(this.a_Pos);
gl.enableVertexAttribArray(this.a_TextCoord);
// 设置位置的顶点参数
this.setVertex(gl);
//开启阿尔法混合，实现注记半透明效果
gl.enable(gl.BLEND);
gl.blendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA);
//绘制图形
gl.drawArrays(gl.TRIANGLE_STRIP, 0, 4);
}
}
// 设置位置的顶点参数
//参考：https://github.com/xiaoiver/custom-mapbox-layer/blob/master/src/layers/PointCloudLayer2.ts
setVertex(gl) {
const currentZoomLevel = this.map.getZoom();
const bearing = this.map.getBearing();
const pitch = this.map.getPitch();
const center = this.map.getCenter();
const viewport = new WebMercatorViewport({
// width: gl.drawingBufferWidth*1.11,
// height: gl.drawingBufferHeight*1.11,
width: gl.drawingBufferWidth,
height: gl.drawingBufferHeight,
longitude: center.lng,
latitude: center.lat,
zoom: currentZoomLevel,
pitch,
bearing
});
// @ts-ignore
const { viewProjectionMatrix, projectionMatrix, viewMatrix, viewMatrixUncentered } = viewport;
let drawParams = {
// @ts-ignore
'u_matrix': viewProjectionMatrix,
'u_point_size': this.pointSize,
'u_is_offset': false,
'u_pixels_per_degree': [0, 0, 0],
'u_pixels_per_degree2': [0, 0, 0],
'u_viewport_center': [0, 0],
'u_pixels_per_meter': [0, 0, 0],
'u_project_scale': zoomToScale(currentZoomLevel),
'u_viewport_center_projection': [0, 0, 0, 0]
};
if (currentZoomLevel > 12) {
const { pixelsPerDegree, pixelsPerDegree2 } = getDistanceScales({
longitude: center.lng,
latitude: center.lat,
zoom: currentZoomLevel,
highPrecision: true
});
const positionPixels = viewport.projectFlat([Math.fround(center.lng), Math.fround(center.lat)], Math.pow(2, currentZoomLevel));
const projectionCenter = transformMat4([], [positionPixels[0], positionPixels[1], 0.0, 1.0], viewProjectionMatrix);
// Always apply uncentered projection matrix if available (shader adds center)
let viewMatrix2 = viewMatrixUncentered || viewMatrix;
// Zero out 4th coordinate ("after" model matrix) - avoids further translations
// viewMatrix = new Matrix4(viewMatrixUncentered || viewMatrix)
// .multiplyRight(VECTOR_TO_POINT_MATRIX);
let viewProjectionMatrix2 = multiply([], projectionMatrix, viewMatrix2);
const VECTOR_TO_POINT_MATRIX = [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0];
viewProjectionMatrix2 = multiply([], viewProjectionMatrix2, VECTOR_TO_POINT_MATRIX);
drawParams['u_matrix'] = viewProjectionMatrix2;
drawParams['u_is_offset'] = true;
drawParams['u_viewport_center'] = [Math.fround(center.lng), Math.fround(center.lat)];
// @ts-ignore
drawParams['u_viewport_center_projection'] = projectionCenter;
drawParams['u_pixels_per_degree'] = pixelsPerDegree && pixelsPerDegree.map(p => Math.fround(p));
drawParams['u_pixels_per_degree2'] = pixelsPerDegree2 && pixelsPerDegree2.map(p => Math.fround(p));
}
gl.uniformMatrix4fv(gl.getUniformLocation(this.program, "u_matrix"), false, drawParams['u_matrix']);
gl.uniform1f(gl.getUniformLocation(this.program, "u_project_scale"), drawParams['u_project_scale']);
gl.uniform1i(gl.getUniformLocation(this.program, "u_is_offset"), drawParams['u_is_offset'] ? 1 : 0);
gl.uniform3fv(gl.getUniformLocation(this.program, "u_pixels_per_degree"), drawParams['u_pixels_per_degree']);
gl.uniform3fv(gl.getUniformLocation(this.program, "u_pixels_per_degree2"), drawParams['u_pixels_per_degree2']);
gl.uniform3fv(gl.getUniformLocation(this.program, "u_pixels_per_meter"), drawParams['u_pixels_per_meter']);
gl.uniform2fv(gl.getUniformLocation(this.program, "u_viewport_center"), drawParams['u_viewport_center']);
gl.uniform4fv(gl.getUniformLocation(this.program, "u_viewport_center_projection"), drawParams['u_viewport_center_projection']);
}
//当map移除当前图层时调用
onRemove(map, gl) {
this.isLayerShow = false;
}
addTo(map){
this.map = map;
if(!this.layerParams) return map.addLayer(this);
this.map.addSource(this.id,this.layerParams.source);
this.map.addLayer({id:this.id,...this.layerParams.layer});
}
remove(map, gl) {
if(!this.map) return console.warn(`Please trigger "addTo" This method is called after the "map" instance is passed in;`);
let layer = this.map.getLayer(this.id);
if(!layer) return console.warn(`The current layer has not been added to the map;`);
this.map.removeLayer(this.id);
}
hide(){
this.visible = false;
this.isLayerShow = false;
this.map.setLayoutProperty(this.id, 'visibility', 'none');
}
show(){
this.visible = true;
this.isLayerShow = true;
this.map.setLayoutProperty(this.id, 'visibility', 'visible');
}
}
})));
