82 lines
2.2 KiB
JavaScript
82 lines
2.2 KiB
JavaScript
goog.provide('ol.geom.MultiLineString');
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goog.require('goog.asserts');
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goog.require('goog.events');
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goog.require('goog.events.EventType');
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goog.require('ol.CoordinateArray');
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goog.require('ol.geom.AbstractCollection');
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goog.require('ol.geom.GeometryType');
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goog.require('ol.geom.LineString');
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/**
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* @constructor
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* @extends {ol.geom.AbstractCollection}
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* @param {Array.<ol.CoordinateArray>} coordinates Coordinates array.
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* @todo stability experimental
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*/
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ol.geom.MultiLineString = function(coordinates) {
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goog.base(this);
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goog.asserts.assert(goog.isArray(coordinates[0][0]));
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var numParts = coordinates.length;
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/**
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* @type {Array.<ol.geom.LineString>}
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* @protected
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*/
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this.components = new Array(numParts);
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for (var i = 0; i < numParts; ++i) {
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var component = new ol.geom.LineString(coordinates[i]);
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this.components[i] = component;
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goog.events.listen(component, goog.events.EventType.CHANGE,
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this.handleComponentChange, false, this);
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}
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};
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goog.inherits(ol.geom.MultiLineString, ol.geom.AbstractCollection);
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/**
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* @inheritDoc
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*/
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ol.geom.MultiLineString.prototype.getType = function() {
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return ol.geom.GeometryType.MULTILINESTRING;
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};
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/**
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* Calculate the distance from a coordinate to this multilinestring. This is
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* the closest distance of the coordinate to one of this multilinestring's
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* components.<
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*
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* @param {ol.Coordinate} coordinate Coordinate.
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* @return {number} Distance from the coordinate to this multilinestring.
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*/
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ol.geom.MultiLineString.prototype.distanceFromCoordinate =
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function(coordinate) {
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var distance = Infinity;
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for (var i = 0, ii = this.components.length; i < ii; ++i) {
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distance = Math.min(distance,
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this.components[i].distanceFromCoordinate(coordinate));
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}
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return distance;
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};
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/**
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* Create a multi-linestring geometry from an array of linestring geometries.
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*
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* @param {Array.<ol.geom.LineString>} geometries Array of geometries.
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* @return {ol.geom.MultiLineString} A new geometry.
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*/
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ol.geom.MultiLineString.fromParts = function(geometries) {
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var count = geometries.length;
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var coordinates = new Array(count);
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for (var i = 0; i < count; ++i) {
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coordinates[i] = geometries[i].getCoordinates();
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}
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return new ol.geom.MultiLineString(coordinates);
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};
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