Software: Apache. PHP/5.5.15 uname -a: Windows NT SVR-DMZ 6.1 build 7600 (Windows Server 2008 R2 Enterprise Edition) i586 SYSTEM Safe-mode: OFF (not secure) C:\dmz\phpMyAdmin\js\openlayers\src\openlayers\lib\OpenLayers\Geometry\ drwxrwxrwx |
Viewing file: Curve.js (3.07 KB) -rw-rw-rw- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for * full list of contributors). Published under the Clear BSD license. * See http://svn.openlayers.org/trunk/openlayers/license.txt for the * full text of the license. */ /** * @requires OpenLayers/Geometry/MultiPoint.js */ /** * Class: OpenLayers.Geometry.Curve * 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. * * Inherits: * - <OpenLayers.Geometry.MultiPoint> */ OpenLayers.Geometry.Curve = OpenLayers.Class(OpenLayers.Geometry.MultiPoint, { /** * Property: componentTypes * {Array(String)} 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. */ componentTypes: ["OpenLayers.Geometry.Point"], /** * Constructor: OpenLayers.Geometry.Curve * * Parameters: * point - {Array(<OpenLayers.Geometry.Point>)} */ initialize: function(points) { OpenLayers.Geometry.MultiPoint.prototype.initialize.apply(this, arguments); }, /** * APIMethod: getLength * * Returns: * {Float} The length of the curve */ getLength: function() { var length = 0.0; if ( this.components && (this.components.length > 1)) { for(var i=1, len=this.components.length; i<len; i++) { length += this.components[i-1].distanceTo(this.components[i]); } } return length; }, /** * APIMethod: getGeodesicLength * Calculate the approximate length of the geometry were it projected onto * the earth. * * projection - {<OpenLayers.Projection>} The spatial reference system * for the geometry coordinates. If not provided, Geographic/WGS84 is * assumed. * * Returns: * {Float} The appoximate geodesic length of the geometry in meters. */ getGeodesicLength: function(projection) { var geom = this; // so we can work with a clone if needed if(projection) { var gg = new OpenLayers.Projection("EPSG:4326"); if(!gg.equals(projection)) { geom = this.clone().transform(projection, gg); } } var length = 0.0; if(geom.components && (geom.components.length > 1)) { var p1, p2; for(var i=1, len=geom.components.length; i<len; i++) { p1 = geom.components[i-1]; p2 = geom.components[i]; // this returns km and requires lon/lat properties length += OpenLayers.Util.distVincenty( {lon: p1.x, lat: p1.y}, {lon: p2.x, lat: p2.y} ); } } // convert to m return length * 1000; }, CLASS_NAME: "OpenLayers.Geometry.Curve" }); |
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