openlayers/examples/rotate-features.html

   1 <html xmlns="http://www.w3.org/1999/xhtml">
   2   <head>
   3     <title>OpenLayers Rotate Features Example</title>
   4     <link rel="stylesheet" href="../theme/default/style.css" type="text/css" />
   5     <link rel="stylesheet" href="style.css" type="text/css" />
   6     <style type="text/css">
   7         p {
   8             width: 500px;
   9         }
  10     </style>
  11     <script src="../lib/OpenLayers.js"></script>
  12     <script type="text/javascript">
  13         var map, pointFeature, lineFeature, polygonFeature;
  14
  15         function init(){
  16             map = new OpenLayers.Map('map');
  17             var layer = new OpenLayers.Layer.WMS( "OpenLayers WMS",
  18                     "http://labs.metacarta.com/wms/vmap0", {layers: 'basic'} );
  19             map.addLayer(layer);
  20
  21             var style_blue = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']);
  22             style_blue.strokeColor = "blue";
  23             style_blue.fillColor = "blue";
  24             var style_green = {
  25                 strokeColor: "#339933",
  26                 strokeOpacity: 1,
  27                 strokeWidth: 3,
  28                 pointRadius: 6,
  29                 pointerEvents: "visiblePainted"
  30             };
  31
  32             var vectorLayer = new OpenLayers.Layer.Vector("Simple Geometry");
  33
  34             // create a point feature
  35             var point = new OpenLayers.Geometry.Point(-110, 45);
  36             pointFeature = new OpenLayers.Feature.Vector(point, null, style_blue);
  37
  38             // create a line feature from a list of points
  39             var pointList = [];
  40             var newPoint = point;
  41             for(var p=0; p<5; ++p) {
  42                 newPoint = new OpenLayers.Geometry.Point(newPoint.x + Math.random(1),
  43                                                          newPoint.y + Math.random(1));
  44                 pointList.push(newPoint);
  45             }
  46             lineFeature = new OpenLayers.Feature.Vector(
  47                 new OpenLayers.Geometry.LineString(pointList),null,style_green);
  48
  49             // create a polygon feature from a linear ring of points
  50             var pointList = [];
  51             for(var p=0; p<6; ++p) {
  52                 var a = p * (2 * Math.PI) / 7;
  53                 var r = Math.random(1) + 1;
  54                 var newPoint = new OpenLayers.Geometry.Point(point.x + (r * Math.cos(a)),
  55                                                              point.y + (r * Math.sin(a)));
  56                 pointList.push(newPoint);
  57             }
  58             pointList.push(pointList[0]);
  59
  60             var linearRing = new OpenLayers.Geometry.LinearRing(pointList);
  61             polygonFeature = new OpenLayers.Feature.Vector(
  62                 new OpenLayers.Geometry.Polygon([linearRing]));
  63
  64
  65             map.addLayer(vectorLayer);
  66             map.setCenter(new OpenLayers.LonLat(point.x, point.y), 5);
  67             vectorLayer.addFeatures([pointFeature, lineFeature, polygonFeature]);
  68
  69             // start rotating
  70             var origin = new OpenLayers.Geometry.Point(-111.04, 45.68);
  71             var style = {
  72                 strokeColor: "#666666",
  73                 strokeOpacity: 1,
  74                 strokeWidth: 1,
  75                 pointRadius: 2,
  76                 pointerEvents: "visiblePainted"
  77             };
  78             var center = new OpenLayers.Feature.Vector(origin, null, style);
  79             vectorLayer.addFeatures([center]);
  80             window.setInterval(function() {rotateFeature(
  81                                pointFeature, 360 / 20, origin)}, 100);
  82             window.setInterval(function() {rotateFeature(
  83                                lineFeature, 360 / 40, origin)}, 100);
  84             window.setInterval(function(){rotateFeature(
  85                                polygonFeature, -360 / 20, origin)}, 100);
  86         }
  87
  88         function rotateFeature(feature, angle, origin) {
  89             feature.geometry.rotate(angle, origin);
  90             feature.layer.drawFeature(feature);
  91         }
  92     </script>
  93   </head>
  94   <body onload="init()">
  95     <h1 id="title">Rotate vector features</h1>
  96
  97   <div id="tags">
  98   </div>
  99   <p id="shortdesc">
 100       Details on how to create and rotate vector features programmatically
 101   </p>
 102
 103     <div id="map" class="smallmap"></div>
 104     <div id="docs">This example shows a few features rotating.  There is not yet a control
 105     built that provides a tool for rotating, but the geometry.rotate method
 106     can be accessed to rotate programmatically.</div>
 107   </body>
 108 </html>