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<!doctype html> <html lang="en"> <head> <title>Code coverage report for ol/geom/flat/geodesicflatgeom.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../../prettify.css" /> <link rel="stylesheet" href="../../../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../../../index.html">all files</a> / <a href="index.html">ol/geom/flat/</a> geodesicflatgeom.js </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 67.61% Statements 48/71 </div> <div class='fl pad1y space-right2'> 50% Branches 4/8 </div> <div class='fl pad1y space-right2'> 71.43% Functions 5/7 </div> <div class='fl pad1y space-right2'> 67.61% Lines 48/71 </div> </div> </div> <div class='status-line medium'></div> <pre><table class="coverage"> <tr><td class="line-count quiet">1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182</td><td class="line-coverage quiet">1×   1× 1× 1× 1× 1×                     1×           20×   20× 20×   20× 20×     20×   20×   20×     20×   20× 20×   20×   20× 20× 20×   20× 20× 20× 20×     20× 20× 20×   20× 20× 20× 20×         20× 20× 20×   20×                 20×     20×                           1×                                                                                           1×   13× 13×           39×                             1×   7× 7×           21×        </td><td class="text"><pre class="prettyprint lang-js">goog.provide('ol.geom.flat.geodesic');   goog.require('goog.asserts'); goog.require('goog.object'); goog.require('ol.TransformFunction'); goog.require('ol.math'); goog.require('ol.proj');     /** * @private * @param {function(number): ol.Coordinate} interpolate Interpolate function. * @param {ol.TransformFunction} transform Transform from longitude/latitude to * projected coordinates. * @param {number} squaredTolerance Squared tolerance. * @return {Array.<number>} Flat coordinates. */ ol.geom.flat.geodesic.line_ = function(interpolate, transform, squaredTolerance) { // FIXME reduce garbage generation // FIXME optimize stack operations   /** @type {Array.<number>} */ var flatCoordinates = [];   var geoA = interpolate(0); var geoB = interpolate(1);   var a = transform(geoA); var b = transform(geoB);   /** @type {Array.<ol.Coordinate>} */ var geoStack = [geoB, geoA]; /** @type {Array.<ol.Coordinate>} */ var stack = [b, a]; /** @type {Array.<number>} */ var fractionStack = [1, 0];   /** @type {Object.<string, boolean>} */ var fractions = {};   var maxIterations = 1e5; var geoM, m, fracA, fracB, fracM, key;   while (--maxIterations > 0 && fractionStack.length > 0) { // Pop the a coordinate off the stack fracA = fractionStack.pop(); geoA = geoStack.pop(); a = stack.pop(); // Add the a coordinate if it has not been added yet key = fracA.toString(); Eif (!goog.object.containsKey(fractions, key)) { flatCoordinates.push(a[0], a[1]); fractions[key] = true; } // Pop the b coordinate off the stack fracB = fractionStack.pop(); geoB = geoStack.pop(); b = stack.pop(); // Find the m point between the a and b coordinates fracM = (fracA + fracB) / 2; geoM = interpolate(fracM); m = transform(geoM); Eif (ol.math.squaredSegmentDistance(m[0], m[1], a[0], a[1], b[0], b[1]) < squaredTolerance) { // If the m point is sufficiently close to the straight line, then we // discard it. Just use the b coordinate and move on to the next line // segment. flatCoordinates.push(b[0], b[1]); key = fracB.toString(); goog.asserts.assert(!goog.object.containsKey(fractions, key), 'fractions object should contain key : ' + key); fractions[key] = true; } else { // Otherwise, we need to subdivide the current line segment. Split it // into two and push the two line segments onto the stack. fractionStack.push(fracB, fracM, fracM, fracA); stack.push(b, m, m, a); geoStack.push(geoB, geoM, geoM, geoA); } } goog.asserts.assert(maxIterations > 0, 'maxIterations should be more than 0');   return flatCoordinates; };     /** * Generate a great-circle arcs between two lat/lon points. * @param {number} lon1 Longitude 1 in degrees. * @param {number} lat1 Latitude 1 in degrees. * @param {number} lon2 Longitude 2 in degrees. * @param {number} lat2 Latitude 2 in degrees. * @param {ol.proj.Projection} projection Projection. * @param {number} squaredTolerance Squared tolerance. * @return {Array.<number>} Flat coordinates. */ ol.geom.flat.geodesic.greatCircleArc = function( lon1, lat1, lon2, lat2, projection, squaredTolerance) {   var geoProjection = ol.proj.get('EPSG:4326');   var cosLat1 = Math.cos(ol.math.toRadians(lat1)); var sinLat1 = Math.sin(ol.math.toRadians(lat1)); var cosLat2 = Math.cos(ol.math.toRadians(lat2)); var sinLat2 = Math.sin(ol.math.toRadians(lat2)); var cosDeltaLon = Math.cos(ol.math.toRadians(lon2 - lon1)); var sinDeltaLon = Math.sin(ol.math.toRadians(lon2 - lon1)); var d = sinLat1 * sinLat2 + cosLat1 * cosLat2 * cosDeltaLon;   return ol.geom.flat.geodesic.line_( /** * @param {number} frac Fraction. * @return {ol.Coordinate} Coordinate. */ function(frac) { if (1 <= d) { return [lon2, lat2]; } var D = frac * Math.acos(d); var cosD = Math.cos(D); var sinD = Math.sin(D); var y = sinDeltaLon * cosLat2; var x = cosLat1 * sinLat2 - sinLat1 * cosLat2 * cosDeltaLon; var theta = Math.atan2(y, x); var lat = Math.asin(sinLat1 * cosD + cosLat1 * sinD * Math.cos(theta)); var lon = ol.math.toRadians(lon1) + Math.atan2(Math.sin(theta) * sinD * cosLat1, cosD - sinLat1 * Math.sin(lat)); return [ol.math.toDegrees(lon), ol.math.toDegrees(lat)]; }, ol.proj.getTransform(geoProjection, projection), squaredTolerance); };     /** * Generate a meridian (line at constant longitude). * @param {number} lon Longitude. * @param {number} lat1 Latitude 1. * @param {number} lat2 Latitude 2. * @param {ol.proj.Projection} projection Projection. * @param {number} squaredTolerance Squared tolerance. * @return {Array.<number>} Flat coordinates. */ ol.geom.flat.geodesic.meridian = function(lon, lat1, lat2, projection, squaredTolerance) { var epsg4326Projection = ol.proj.get('EPSG:4326'); return ol.geom.flat.geodesic.line_( /** * @param {number} frac Fraction. * @return {ol.Coordinate} Coordinate. */ function(frac) { return [lon, lat1 + ((lat2 - lat1) * frac)]; }, ol.proj.getTransform(epsg4326Projection, projection), squaredTolerance); };     /** * Generate a parallel (line at constant latitude). * @param {number} lat Latitude. * @param {number} lon1 Longitude 1. * @param {number} lon2 Longitude 2. * @param {ol.proj.Projection} projection Projection. * @param {number} squaredTolerance Squared tolerance. * @return {Array.<number>} Flat coordinates. */ ol.geom.flat.geodesic.parallel = function(lat, lon1, lon2, projection, squaredTolerance) { var epsg4326Projection = ol.proj.get('EPSG:4326'); return ol.geom.flat.geodesic.line_( /** * @param {number} frac Fraction. * @return {ol.Coordinate} Coordinate. */ function(frac) { return [lon1 + ((lon2 - lon1) * frac), lat]; }, ol.proj.getTransform(epsg4326Projection, projection), squaredTolerance); };  </pre></td></tr> </table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="http://istanbul-js.org/" target="_blank">istanbul</a> at Fri Nov 06 2015 19:36:11 GMT+0100 (CET) </div> </div> <script src="../../../prettify.js"></script> <script> window.onload = function () { if (typeof prettyPrint === 'function') { prettyPrint(); } }; </script> <script src="../../../sorter.js"></script> </body> </html>