Curve.js
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/* Copyright (c) 2006 MetaCarta, Inc., published under the BSD license.
* See http://svn.openlayers.org/trunk/openlayers/release-license.txt
* for the full text of the license. */
/**
* @class
*
* A Curve is a MultiPoint, whose points are assumed to be connected. To
* this end, we provide a "getLength()" function, which iterates through
* the points, summing the distances between them.
*
* @requires OpenLayers/Geometry/MultiPoint.js
*/
OpenLayers.Geometry.Curve = OpenLayers.Class.create();
OpenLayers.Geometry.Curve.prototype =
OpenLayers.Class.inherit(OpenLayers.Geometry.MultiPoint, {
/**
* An array of class names representing the types of components that
* the collection can include. A null value means the component types
* are not restricted.
* @type Array(String)
*/
componentTypes: ["OpenLayers.Geometry.Point"],
/**
* @constructor
*
* @param {Array(OpenLayers.Geometry.Point)} points
*/
initialize: function(points) {
OpenLayers.Geometry.MultiPoint.prototype.initialize.apply(this,
arguments);
},
/**
* @returns The length of the curve
* @type float
*/
getLength: function() {
var length = 0.0;
if ( this.components && (this.components.length > 1)) {
for(var i=1; i < this.components.length; i++) {
length += this.components[i-1].distanceTo(this.components[i]);
}
}
return length;
},
/** @final @type String */
CLASS_NAME: "OpenLayers.Geometry.Curve"
});