71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU AFFERO General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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or see http://www.gnu.org/licenses/agpl.txt.
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*/
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// OSRM routing geometry
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// [renders routing geometry]
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OSRM.RoutingGeometry = {
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// show route geometry - if there is a route
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show: function(response) {
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var geometry = OSRM.RoutingGeometry._decode(response.route_geometry, 5);
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var positions = [];
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for( var i=0, size=geometry.length; i < size; i++)
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positions.push( new L.LatLng(geometry[i][0], geometry[i][1]) );
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OSRM.G.route.showRoute(positions, OSRM.Route.ROUTE);
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},
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//show route geometry - if there is no route
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showNA: function() {
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var positions = [];
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for(var i=0, size=OSRM.G.markers.route.length; i<size; i++)
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positions.push( OSRM.G.markers.route[i].getPosition() );
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OSRM.G.route.showRoute(positions, OSRM.Route.NOROUTE);
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},
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//decode compressed route geometry
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_decode: function(encoded, precision) {
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precision = Math.pow(10, -precision);
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var len = encoded.length, index=0, lat=0, lng = 0, array = [];
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while (index < len) {
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var b, shift = 0, result = 0;
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do {
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b = encoded.charCodeAt(index++) - 63;
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result |= (b & 0x1f) << shift;
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shift += 5;
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} while (b >= 0x20);
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var dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
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lat += dlat;
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shift = 0;
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result = 0;
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do {
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b = encoded.charCodeAt(index++) - 63;
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result |= (b & 0x1f) << shift;
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shift += 5;
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} while (b >= 0x20);
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var dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
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lng += dlng;
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array.push([lat * precision, lng * precision]);
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}
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return array;
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}
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}; |