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This commit is contained in:
530
static/lib/Highcharts-10.2.1/es-modules/Maps/Projection.js
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530
static/lib/Highcharts-10.2.1/es-modules/Maps/Projection.js
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/* *
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*
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* (c) 2021 Torstein Honsi
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*
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* License: www.highcharts.com/license
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*
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* !!!!!!! SOURCE GETS TRANSPILED BY TYPESCRIPT. EDIT TS FILE ONLY. !!!!!!!
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*
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* */
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'use strict';
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var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
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if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
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if (ar || !(i in from)) {
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if (!ar) ar = Array.prototype.slice.call(from, 0, i);
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ar[i] = from[i];
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}
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}
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return to.concat(ar || Array.prototype.slice.call(from));
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};
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import PC from '../Core/Geometry/PolygonClip.js';
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var clipLineString = PC.clipLineString, clipPolygon = PC.clipPolygon;
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import registry from './Projections/ProjectionRegistry.js';
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import U from '../Core/Utilities.js';
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var clamp = U.clamp, erase = U.erase;
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var deg2rad = Math.PI * 2 / 360;
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// Safe padding on either side of the antimeridian to avoid points being
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// projected to the wrong side of the plane
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var floatCorrection = 0.000001;
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// Keep longitude within -180 and 180. This is faster than using the modulo
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// operator, and preserves the distinction between -180 and 180.
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var wrapLon = function (lon) {
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// Replacing the if's with while would increase the range, but make it prone
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// to crashes on bad data
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if (lon < -180) {
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lon += 360;
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}
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if (lon > 180) {
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lon -= 360;
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}
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return lon;
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};
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var Projection = /** @class */ (function () {
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function Projection(options) {
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if (options === void 0) { options = {}; }
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// Whether the chart has points, lines or polygons given as coordinates
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// with positive up, as opposed to paths in the SVG plane with positive
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// down.
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this.hasCoordinates = false;
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// Whether the chart has true projection as opposed to pre-projected geojson
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// as in the legacy map collection.
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this.hasGeoProjection = false;
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this.maxLatitude = 90;
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this.options = options;
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var name = options.name, projectedBounds = options.projectedBounds, rotation = options.rotation;
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this.rotator = rotation ? this.getRotator(rotation) : void 0;
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var ProjectionDefinition = name ? Projection.registry[name] : void 0;
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if (ProjectionDefinition) {
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this.def = new ProjectionDefinition(options);
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}
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var _a = this, def = _a.def, rotator = _a.rotator;
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if (def) {
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this.maxLatitude = def.maxLatitude || 90;
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this.hasGeoProjection = true;
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}
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if (rotator && def) {
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this.forward = function (lonLat) {
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return def.forward(rotator.forward(lonLat));
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};
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this.inverse = function (xy) {
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return rotator.inverse(def.inverse(xy));
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};
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}
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else if (def) {
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this.forward = function (lonLat) { return def.forward(lonLat); };
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this.inverse = function (xy) { return def.inverse(xy); };
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}
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else if (rotator) {
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this.forward = rotator.forward;
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this.inverse = rotator.inverse;
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}
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// Projected bounds/clipping
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this.bounds = projectedBounds === 'world' ?
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def && def.bounds :
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projectedBounds;
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}
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// Add a projection definition to the registry, accessible by its `name`.
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Projection.add = function (name, definition) {
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Projection.registry[name] = definition;
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};
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// Calculate the great circle between two given coordinates
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Projection.greatCircle = function (point1, point2, inclusive) {
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var atan2 = Math.atan2, cos = Math.cos, sin = Math.sin, sqrt = Math.sqrt;
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var lat1 = point1[1] * deg2rad;
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var lon1 = point1[0] * deg2rad;
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var lat2 = point2[1] * deg2rad;
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var lon2 = point2[0] * deg2rad;
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var deltaLat = lat2 - lat1;
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var deltaLng = lon2 - lon1;
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var calcA = sin(deltaLat / 2) * sin(deltaLat / 2) +
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cos(lat1) * cos(lat2) * sin(deltaLng / 2) * sin(deltaLng / 2);
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var calcB = 2 * atan2(sqrt(calcA), sqrt(1 - calcA));
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var distance = calcB * 6371e3; // in meters
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var jumps = Math.round(distance / 500000); // 500 km each jump
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var lineString = [];
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if (inclusive) {
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lineString.push(point1);
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}
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if (jumps > 1) {
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var step = 1 / jumps;
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for (var fraction = step; fraction < 0.999; // Account for float errors
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fraction += step) {
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var A = sin((1 - fraction) * calcB) / sin(calcB);
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var B = sin(fraction * calcB) / sin(calcB);
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var x = A * cos(lat1) * cos(lon1) + B * cos(lat2) * cos(lon2);
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var y = A * cos(lat1) * sin(lon1) + B * cos(lat2) * sin(lon2);
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var z = A * sin(lat1) + B * sin(lat2);
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var lat3 = atan2(z, sqrt(x * x + y * y));
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var lon3 = atan2(y, x);
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lineString.push([lon3 / deg2rad, lat3 / deg2rad]);
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}
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}
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if (inclusive) {
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lineString.push(point2);
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}
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return lineString;
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};
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Projection.insertGreatCircles = function (poly) {
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var i = poly.length - 1;
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while (i--) {
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// Distance in degrees, either in lon or lat. Avoid heavy
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// calculation of true distance.
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var roughDistance = Math.max(Math.abs(poly[i][0] - poly[i + 1][0]), Math.abs(poly[i][1] - poly[i + 1][1]));
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if (roughDistance > 10) {
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var greatCircle = Projection.greatCircle(poly[i], poly[i + 1]);
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if (greatCircle.length) {
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poly.splice.apply(poly, __spreadArray([i + 1, 0], greatCircle, false));
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}
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}
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}
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};
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Projection.toString = function (options) {
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var _a = options || {}, name = _a.name, rotation = _a.rotation;
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return [name, rotation && rotation.join(',')].join(';');
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};
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Projection.prototype.lineIntersectsBounds = function (line) {
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var _a = this.bounds || {}, x1 = _a.x1, x2 = _a.x2, y1 = _a.y1, y2 = _a.y2;
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var getIntersect = function (line, dim, val) {
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var p1 = line[0], p2 = line[1], otherDim = dim ? 0 : 1;
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// Check if points are on either side of the line
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if (typeof val === 'number' && p1[dim] >= val !== p2[dim] >= val) {
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var fraction = ((val - p1[dim]) / (p2[dim] - p1[dim])), crossingVal = p1[otherDim] +
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fraction * (p2[otherDim] - p1[otherDim]);
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return dim ? [crossingVal, val] : [val, crossingVal];
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}
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};
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var intersection, ret = line[0];
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if ((intersection = getIntersect(line, 0, x1))) {
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ret = intersection;
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// Assuming line[1] was originally outside, replace it with the
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// intersection point so that the horizontal intersection will
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// be correct.
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line[1] = intersection;
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}
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else if ((intersection = getIntersect(line, 0, x2))) {
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ret = intersection;
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line[1] = intersection;
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}
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if ((intersection = getIntersect(line, 1, y1))) {
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ret = intersection;
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}
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else if ((intersection = getIntersect(line, 1, y2))) {
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ret = intersection;
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}
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return ret;
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};
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/*
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* Take the rotation options and return the appropriate projection functions
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*/
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Projection.prototype.getRotator = function (rotation) {
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var deltaLambda = rotation[0] * deg2rad, deltaPhi = (rotation[1] || 0) * deg2rad, deltaGamma = (rotation[2] || 0) * deg2rad;
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var cosDeltaPhi = Math.cos(deltaPhi), sinDeltaPhi = Math.sin(deltaPhi), cosDeltaGamma = Math.cos(deltaGamma), sinDeltaGamma = Math.sin(deltaGamma);
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if (deltaLambda === 0 && deltaPhi === 0 && deltaGamma === 0) {
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// Don't waste processing time
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return;
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}
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return {
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forward: function (lonLat) {
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// Lambda (lon) rotation
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var lon = lonLat[0] * deg2rad + deltaLambda;
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// Phi (lat) and gamma rotation
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var lat = lonLat[1] * deg2rad, cosLat = Math.cos(lat), x = Math.cos(lon) * cosLat, y = Math.sin(lon) * cosLat, sinLat = Math.sin(lat), k = sinLat * cosDeltaPhi + x * sinDeltaPhi;
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return [
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Math.atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - sinLat * sinDeltaPhi) / deg2rad,
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Math.asin(k * cosDeltaGamma + y * sinDeltaGamma) / deg2rad
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];
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},
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inverse: function (rLonLat) {
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// Lambda (lon) unrotation
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var lon = rLonLat[0] * deg2rad;
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// Phi (lat) and gamma unrotation
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var lat = rLonLat[1] * deg2rad, cosLat = Math.cos(lat), x = Math.cos(lon) * cosLat, y = Math.sin(lon) * cosLat, sinLat = Math.sin(lat), k = sinLat * cosDeltaGamma - y * sinDeltaGamma;
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return [
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(Math.atan2(y * cosDeltaGamma + sinLat * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi) - deltaLambda) / deg2rad,
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Math.asin(k * cosDeltaPhi - x * sinDeltaPhi) / deg2rad
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];
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}
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};
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};
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// Project a lonlat coordinate position to xy. Dynamically overridden when
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// projection is set.
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Projection.prototype.forward = function (lonLat) {
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return lonLat;
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};
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// Unproject an xy chart coordinate position to lonlat. Dynamically
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// overridden when projection is set.
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Projection.prototype.inverse = function (xy) {
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return xy;
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};
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Projection.prototype.cutOnAntimeridian = function (poly, isPolygon) {
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var antimeridian = 180;
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var intersections = [];
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var polygons = [poly];
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poly.forEach(function (lonLat, i) {
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var previousLonLat = poly[i - 1];
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if (!i) {
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if (!isPolygon) {
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return;
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}
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// Else, wrap to beginning
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previousLonLat = poly[poly.length - 1];
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}
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var lon1 = previousLonLat[0], lon2 = lonLat[0];
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if (
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// Both points, after rotating for antimeridian, are on the far
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// side of the Earth
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(lon1 < -90 || lon1 > 90) &&
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(lon2 < -90 || lon2 > 90) &&
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// ... and on either side of the plane
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(lon1 > 0) !== (lon2 > 0)) {
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// Interpolate to the intersection latitude
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var fraction = clamp((antimeridian - (lon1 + 360) % 360) /
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((lon2 + 360) % 360 - (lon1 + 360) % 360), 0, 1), lat = (previousLonLat[1] +
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fraction * (lonLat[1] - previousLonLat[1]));
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intersections.push({
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i: i,
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lat: lat,
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direction: lon1 < 0 ? 1 : -1,
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previousLonLat: previousLonLat,
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lonLat: lonLat
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});
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}
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});
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var polarIntersection;
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if (intersections.length) {
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if (isPolygon) {
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// Simplified use of the even-odd rule, if there is an odd
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// amount of intersections between the polygon and the
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// antimeridian, the pole is inside the polygon. Applies
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// primarily to Antarctica.
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if (intersections.length % 2 === 1) {
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polarIntersection = intersections.slice().sort(function (a, b) { return Math.abs(b.lat) - Math.abs(a.lat); })[0];
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erase(intersections, polarIntersection);
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}
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// Pull out slices of the polygon that is on the opposite side
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// of the antimeridian compared to the starting point
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var i = intersections.length - 2;
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while (i >= 0) {
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var index = intersections[i].i;
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var lonPlus = wrapLon(antimeridian +
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intersections[i].direction * floatCorrection);
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var lonMinus = wrapLon(antimeridian -
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intersections[i].direction * floatCorrection);
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var slice = poly.splice.apply(poly, __spreadArray([index,
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intersections[i + 1].i - index], Projection.greatCircle([lonPlus, intersections[i].lat], [lonPlus, intersections[i + 1].lat], true), false));
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// Add interpolated points close to the cut
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slice.push.apply(slice, Projection.greatCircle([lonMinus, intersections[i + 1].lat], [lonMinus, intersections[i].lat], true));
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polygons.push(slice);
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i -= 2;
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}
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// Insert dummy points close to the pole
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if (polarIntersection) {
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for (var i_1 = 0; i_1 < polygons.length; i_1++) {
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var direction = polarIntersection.direction, lat = polarIntersection.lat, poly_1 = polygons[i_1], indexOf = poly_1.indexOf(polarIntersection.lonLat);
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if (indexOf > -1) {
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var polarLatitude = (lat < 0 ? -1 : 1) *
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this.maxLatitude;
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var lon1 = wrapLon(antimeridian +
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direction * floatCorrection);
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var lon2 = wrapLon(antimeridian -
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direction * floatCorrection);
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var polarSegment = Projection.greatCircle([lon1, lat], [lon1, polarLatitude], true);
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// Circle around the pole point in order to make
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// polygon clipping right. Without this, Antarctica
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// would wrap the wrong way in an LLC projection
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// with parallels [30, 40].
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for (var lon = lon1 + 120 * direction; lon > -180 && lon < 180; lon += 120 * direction) {
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polarSegment.push([lon, polarLatitude]);
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}
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polarSegment.push.apply(polarSegment, Projection.greatCircle([lon2, polarLatitude], [lon2, polarIntersection.lat], true));
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poly_1.splice.apply(poly_1, __spreadArray([indexOf,
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0], polarSegment, false));
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break;
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}
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}
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}
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// Map lines, not closed
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}
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else {
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var i = intersections.length;
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while (i--) {
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var index = intersections[i].i;
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var slice = poly.splice(index, poly.length,
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// Add interpolated point close to the cut
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[
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wrapLon(antimeridian +
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intersections[i].direction * floatCorrection),
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intersections[i].lat
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]);
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// Add interpolated point close to the cut
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slice.unshift([
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wrapLon(antimeridian -
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intersections[i].direction * floatCorrection),
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intersections[i].lat
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]);
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polygons.push(slice);
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}
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}
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}
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return polygons;
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};
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// Take a GeoJSON geometry and return a translated SVGPath
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Projection.prototype.path = function (geometry) {
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var _this = this;
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var _a = this, bounds = _a.bounds, def = _a.def, rotator = _a.rotator;
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var antimeridian = 180;
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var path = [];
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var isPolygon = geometry.type === 'Polygon' ||
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geometry.type === 'MultiPolygon';
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// @todo: It doesn't really have to do with whether north is
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// positive. It depends on whether the coordinates are
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// pre-projected.
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var hasGeoProjection = this.hasGeoProjection;
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// Detect whether we need to do antimeridian cutting and clipping to
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// bounds. The alternative (currently for Orthographic) is to apply a
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// clip angle.
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var projectingToPlane = !def || def.antimeridianCutting !== false;
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// We need to rotate in a separate step before applying antimeridian
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// cutting
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var preclip = projectingToPlane ? rotator : void 0;
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var postclip = projectingToPlane ? (def || this) : this;
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var boundsPolygon;
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if (bounds) {
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boundsPolygon = [
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[bounds.x1, bounds.y1],
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[bounds.x2, bounds.y1],
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[bounds.x2, bounds.y2],
|
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[bounds.x1, bounds.y2]
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||||
];
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||||
}
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var addToPath = function (polygon) {
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// Create a copy of the original coordinates. The copy applies a
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// correction of points close to the antimeridian in order to
|
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// prevent the points to be projected to the wrong side of the
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// plane. Float errors in topojson or in the projection may cause
|
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// that.
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var poly = polygon.map(function (lonLat) {
|
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if (projectingToPlane) {
|
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if (preclip) {
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lonLat = preclip.forward(lonLat);
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}
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var lon = lonLat[0];
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if (Math.abs(lon - antimeridian) < floatCorrection) {
|
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if (lon < antimeridian) {
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lon = antimeridian - floatCorrection;
|
||||
}
|
||||
else {
|
||||
lon = antimeridian + floatCorrection;
|
||||
}
|
||||
}
|
||||
lonLat = [lon, lonLat[1]];
|
||||
}
|
||||
return lonLat;
|
||||
});
|
||||
var polygons = [poly];
|
||||
if (hasGeoProjection) {
|
||||
// Insert great circles into long straight lines
|
||||
Projection.insertGreatCircles(poly);
|
||||
if (projectingToPlane) {
|
||||
polygons = _this.cutOnAntimeridian(poly, isPolygon);
|
||||
}
|
||||
}
|
||||
polygons.forEach(function (poly) {
|
||||
if (poly.length < 2) {
|
||||
return;
|
||||
}
|
||||
var movedTo = false;
|
||||
var firstValidLonLat;
|
||||
var lastValidLonLat;
|
||||
var gap = false;
|
||||
var pushToPath = function (point) {
|
||||
if (!movedTo) {
|
||||
path.push(['M', point[0], point[1]]);
|
||||
movedTo = true;
|
||||
}
|
||||
else {
|
||||
path.push(['L', point[0], point[1]]);
|
||||
}
|
||||
};
|
||||
var someOutside = false, someInside = false;
|
||||
var points = poly.map(function (lonLat) {
|
||||
var xy = postclip.forward(lonLat);
|
||||
if (xy.outside) {
|
||||
someOutside = true;
|
||||
}
|
||||
else {
|
||||
someInside = true;
|
||||
}
|
||||
// Mercator projects pole points to Infinity, and
|
||||
// clipPolygon is not able to handle it.
|
||||
if (xy[1] === Infinity) {
|
||||
xy[1] = 10e9;
|
||||
}
|
||||
else if (xy[1] === -Infinity) {
|
||||
xy[1] = -10e9;
|
||||
}
|
||||
return xy;
|
||||
});
|
||||
if (projectingToPlane) {
|
||||
// Wrap around in order for pointInPolygon to work
|
||||
if (isPolygon) {
|
||||
points.push(points[0]);
|
||||
}
|
||||
if (someOutside) {
|
||||
// All points are outside
|
||||
if (!someInside) {
|
||||
return;
|
||||
}
|
||||
// Some inside, some outside. Clip to the bounds.
|
||||
if (boundsPolygon) {
|
||||
// Polygons
|
||||
if (isPolygon) {
|
||||
points = clipPolygon(points, boundsPolygon);
|
||||
// Linestrings
|
||||
}
|
||||
else if (bounds) {
|
||||
clipLineString(points, boundsPolygon)
|
||||
.forEach(function (points) {
|
||||
movedTo = false;
|
||||
points.forEach(pushToPath);
|
||||
});
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
points.forEach(pushToPath);
|
||||
// For orthographic projection, or when a clipAngle applies
|
||||
}
|
||||
else {
|
||||
for (var i = 0; i < points.length; i++) {
|
||||
var lonLat = poly[i], point = points[i];
|
||||
if (!point.outside) {
|
||||
// In order to be able to interpolate if the first
|
||||
// or last point is invalid (on the far side of the
|
||||
// globe in an orthographic projection), we need to
|
||||
// push the first valid point to the end of the
|
||||
// polygon.
|
||||
if (isPolygon && !firstValidLonLat) {
|
||||
firstValidLonLat = lonLat;
|
||||
poly.push(lonLat);
|
||||
points.push(point);
|
||||
}
|
||||
// When entering the first valid point after a gap
|
||||
// of invalid points, typically on the far side of
|
||||
// the globe in an orthographic projection.
|
||||
if (gap && lastValidLonLat) {
|
||||
// For areas, in an orthographic projection, the
|
||||
// great circle between two visible points will
|
||||
// be close to the horizon. A possible exception
|
||||
// may be when the two points are on opposite
|
||||
// sides of the globe. It that poses a problem,
|
||||
// we may have to rewrite this to use the small
|
||||
// circle related to the current lon0 and lat0.
|
||||
if (isPolygon && hasGeoProjection) {
|
||||
var greatCircle = Projection.greatCircle(lastValidLonLat, lonLat);
|
||||
greatCircle.forEach(function (lonLat) {
|
||||
return pushToPath(postclip.forward(lonLat));
|
||||
});
|
||||
// For lines, just jump over the gap
|
||||
}
|
||||
else {
|
||||
movedTo = false;
|
||||
}
|
||||
}
|
||||
pushToPath(point);
|
||||
lastValidLonLat = lonLat;
|
||||
gap = false;
|
||||
}
|
||||
else {
|
||||
gap = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
});
|
||||
};
|
||||
if (geometry.type === 'LineString') {
|
||||
addToPath(geometry.coordinates);
|
||||
}
|
||||
else if (geometry.type === 'MultiLineString') {
|
||||
geometry.coordinates.forEach(function (c) { return addToPath(c); });
|
||||
}
|
||||
else if (geometry.type === 'Polygon') {
|
||||
geometry.coordinates.forEach(function (c) { return addToPath(c); });
|
||||
if (path.length) {
|
||||
path.push(['Z']);
|
||||
}
|
||||
}
|
||||
else if (geometry.type === 'MultiPolygon') {
|
||||
geometry.coordinates.forEach(function (polygons) {
|
||||
polygons.forEach(function (c) { return addToPath(c); });
|
||||
});
|
||||
if (path.length) {
|
||||
path.push(['Z']);
|
||||
}
|
||||
}
|
||||
return path;
|
||||
};
|
||||
Projection.registry = registry;
|
||||
return Projection;
|
||||
}());
|
||||
export default Projection;
|
||||
Reference in New Issue
Block a user