all files / ol/geom/ linestring.js

87.18% Statements 68/78
55.56% Branches 10/18
78.57% Functions 11/14
87.18% Lines 68/78
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261                               332×           332×           332×           332×           332×   332×                                           22× 22× 22×                                                                                                             57×       57× 57×                   134×                                                                           60×               14×                         398× 162×   236× 236× 170×   236×   236×                   325× 325×    
goog.provide('ol.geom.LineString');
 
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('ol');
goog.require('ol.extent');
goog.require('ol.geom.GeometryLayout');
goog.require('ol.geom.GeometryType');
goog.require('ol.geom.SimpleGeometry');
goog.require('ol.geom.flat.closest');
goog.require('ol.geom.flat.deflate');
goog.require('ol.geom.flat.inflate');
goog.require('ol.geom.flat.interpolate');
goog.require('ol.geom.flat.intersectsextent');
goog.require('ol.geom.flat.length');
goog.require('ol.geom.flat.segments');
goog.require('ol.geom.flat.simplify');
 
 
 
/**
 * @classdesc
 * Linestring geometry.
 *
 * @constructor
 * @extends {ol.geom.SimpleGeometry}
 * @param {Array.<ol.Coordinate>} coordinates Coordinates.
 * @param {ol.geom.GeometryLayout=} opt_layout Layout.
 * @api stable
 */
ol.geom.LineString = function(coordinates, opt_layout) {
 
  goog.base(this);
 
  /**
   * @private
   * @type {ol.Coordinate}
   */
  this.flatMidpoint_ = null;
 
  /**
   * @private
   * @type {number}
   */
  this.flatMidpointRevision_ = -1;
 
  /**
   * @private
   * @type {number}
   */
  this.maxDelta_ = -1;
 
  /**
   * @private
   * @type {number}
   */
  this.maxDeltaRevision_ = -1;
 
  this.setCoordinates(coordinates, opt_layout);
 
};
goog.inherits(ol.geom.LineString, ol.geom.SimpleGeometry);
 
 
/**
 * Append the passed coordinate to the coordinates of the linestring.
 * @param {ol.Coordinate} coordinate Coordinate.
 * @api stable
 */
ol.geom.LineString.prototype.appendCoordinate = function(coordinate) {
  goog.asserts.assert(coordinate.length == this.stride,
      'length of coordinate array should match stride');
  Iif (!this.flatCoordinates) {
    this.flatCoordinates = coordinate.slice();
  } else {
    goog.array.extend(this.flatCoordinates, coordinate);
  }
  this.changed();
};
 
 
/**
 * Make a complete copy of the geometry.
 * @return {!ol.geom.LineString} Clone.
 * @api stable
 */
ol.geom.LineString.prototype.clone = function() {
  var lineString = new ol.geom.LineString(null);
  lineString.setFlatCoordinates(this.layout, this.flatCoordinates.slice());
  return lineString;
};
 
 
/**
 * @inheritDoc
 */
ol.geom.LineString.prototype.closestPointXY =
    function(x, y, closestPoint, minSquaredDistance) {
  if (minSquaredDistance <
      ol.extent.closestSquaredDistanceXY(this.getExtent(), x, y)) {
    return minSquaredDistance;
  }
  if (this.maxDeltaRevision_ != this.getRevision()) {
    this.maxDelta_ = Math.sqrt(ol.geom.flat.closest.getMaxSquaredDelta(
        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));
    this.maxDeltaRevision_ = this.getRevision();
  }
  return ol.geom.flat.closest.getClosestPoint(
      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
      this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);
};
 
 
/**
 * Iterate over each segment, calling the provided callback.
 * If the callback returns a truthy value the function returns that
 * value immediately. Otherwise the function returns `false`.
 *
 * @param {function(this: S, ol.Coordinate, ol.Coordinate): T} callback Function
 *     called for each segment.
 * @param {S=} opt_this The object to be used as the value of 'this'
 *     within callback.
 * @return {T|boolean} Value.
 * @template T,S
 * @api
 */
ol.geom.LineString.prototype.forEachSegment = function(callback, opt_this) {
  return ol.geom.flat.segments.forEach(this.flatCoordinates, 0,
      this.flatCoordinates.length, this.stride, callback, opt_this);
};
 
 
/**
 * Returns the coordinate at `m` using linear interpolation, or `null` if no
 * such coordinate exists.
 *
 * `opt_extrapolate` controls extrapolation beyond the range of Ms in the
 * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first
 * M will return the first coordinate and Ms greater than the last M will
 * return the last coordinate.
 *
 * @param {number} m M.
 * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.
 * @return {ol.Coordinate} Coordinate.
 * @api stable
 */
ol.geom.LineString.prototype.getCoordinateAtM = function(m, opt_extrapolate) {
  Iif (this.layout != ol.geom.GeometryLayout.XYM &&
      this.layout != ol.geom.GeometryLayout.XYZM) {
    return null;
  }
  var extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;
  return ol.geom.flat.lineStringCoordinateAtM(this.flatCoordinates, 0,
      this.flatCoordinates.length, this.stride, m, extrapolate);
};
 
 
/**
 * Return the coordinates of the linestring.
 * @return {Array.<ol.Coordinate>} Coordinates.
 * @api stable
 */
ol.geom.LineString.prototype.getCoordinates = function() {
  return ol.geom.flat.inflate.coordinates(
      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
};
 
 
/**
 * Return the length of the linestring on projected plane.
 * @return {number} Length (on projected plane).
 * @api stable
 */
ol.geom.LineString.prototype.getLength = function() {
  return ol.geom.flat.length.lineString(
      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);
};
 
 
/**
 * @return {Array.<number>} Flat midpoint.
 */
ol.geom.LineString.prototype.getFlatMidpoint = function() {
  Eif (this.flatMidpointRevision_ != this.getRevision()) {
    this.flatMidpoint_ = ol.geom.flat.interpolate.lineString(
        this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
        0.5, this.flatMidpoint_);
    this.flatMidpointRevision_ = this.getRevision();
  }
  return this.flatMidpoint_;
};
 
 
/**
 * @inheritDoc
 */
ol.geom.LineString.prototype.getSimplifiedGeometryInternal =
    function(squaredTolerance) {
  var simplifiedFlatCoordinates = [];
  simplifiedFlatCoordinates.length = ol.geom.flat.simplify.douglasPeucker(
      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
      squaredTolerance, simplifiedFlatCoordinates, 0);
  var simplifiedLineString = new ol.geom.LineString(null);
  simplifiedLineString.setFlatCoordinates(
      ol.geom.GeometryLayout.XY, simplifiedFlatCoordinates);
  return simplifiedLineString;
};
 
 
/**
 * @inheritDoc
 * @api stable
 */
ol.geom.LineString.prototype.getType = function() {
  return ol.geom.GeometryType.LINE_STRING;
};
 
 
/**
 * @inheritDoc
 * @api stable
 */
ol.geom.LineString.prototype.intersectsExtent = function(extent) {
  return ol.geom.flat.intersectsextent.lineString(
      this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,
      extent);
};
 
 
/**
 * Set the coordinates of the linestring.
 * @param {Array.<ol.Coordinate>} coordinates Coordinates.
 * @param {ol.geom.GeometryLayout=} opt_layout Layout.
 * @api stable
 */
ol.geom.LineString.prototype.setCoordinates =
    function(coordinates, opt_layout) {
  if (!coordinates) {
    this.setFlatCoordinates(ol.geom.GeometryLayout.XY, null);
  } else {
    this.setLayout(opt_layout, coordinates, 1);
    if (!this.flatCoordinates) {
      this.flatCoordinates = [];
    }
    this.flatCoordinates.length = ol.geom.flat.deflate.coordinates(
        this.flatCoordinates, 0, coordinates, this.stride);
    this.changed();
  }
};
 
 
/**
 * @param {ol.geom.GeometryLayout} layout Layout.
 * @param {Array.<number>} flatCoordinates Flat coordinates.
 */
ol.geom.LineString.prototype.setFlatCoordinates =
    function(layout, flatCoordinates) {
  this.setFlatCoordinatesInternal(layout, flatCoordinates);
  this.changed();
};