57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
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/* *
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*
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* (c) 2010-2024 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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// Compute bounds from a path element
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const boundsFromPath = function (path) {
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let x2 = -Number.MAX_VALUE, x1 = Number.MAX_VALUE, y2 = -Number.MAX_VALUE, y1 = Number.MAX_VALUE, validBounds;
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path.forEach((seg) => {
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const x = seg[seg.length - 2], y = seg[seg.length - 1];
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if (typeof x === 'number' &&
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typeof y === 'number') {
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x1 = Math.min(x1, x);
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x2 = Math.max(x2, x);
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y1 = Math.min(y1, y);
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y2 = Math.max(y2, y);
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validBounds = true;
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}
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});
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if (validBounds) {
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return { x1, y1, x2, y2 };
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}
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};
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/**
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* Test for point in polygon. Polygon defined as array of [x,y] points.
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* @private
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*/
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const pointInPolygon = function ({ x, y }, polygon) {
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let i, j, rel1, rel2, c = false;
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for (i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
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rel1 = polygon[i][1] > y;
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rel2 = polygon[j][1] > y;
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if (rel1 !== rel2 &&
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(x < (polygon[j][0] - polygon[i][0]) * (y - polygon[i][1]) /
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(polygon[j][1] - polygon[i][1]) +
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polygon[i][0])) {
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c = !c;
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}
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}
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return c;
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};
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/* *
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*
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* Default Export
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*
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* */
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const MapUtilities = {
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boundsFromPath,
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pointInPolygon
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};
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export default MapUtilities;
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