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var map, vectorLayer, drawFeature, features
map = new OpenLayers.Map('map', {
eventListeners: {
movestart: function() {
console.time("move");
},
moveend: function() {
console.timeEnd("move");
}
}
});
// allow testing of specific renderers via "?renderer=Canvas", etc
var renderer = OpenLayers.Util.getParameters(window.location.href).renderer;
renderer = (renderer) ? [renderer] : OpenLayers.Layer.Vector.prototype.renderers;
vectorLayer = new OpenLayers.Layer.Vector("Vector Layer", {
isBaseLayer: true,
renderers: renderer,
eventListeners: {
beforefeaturesadded: function() {
console.time("addFeatures");
},
featuresadded: function() {
console.timeEnd("addFeatures");
}
}
});
map.addLayers([vectorLayer]);
map.addControl(new OpenLayers.Control.MousePosition());
map.setCenter(new OpenLayers.LonLat(0, 0), 2);
features = new Array(500);
var x, y, points
for (var i = 0; i < 500; i++) {
x = 90-Math.random()*180;
y = 45-Math.random()*90;
var pointList = [];
for(var p=0; p<19; ++p) {
var a = p * (2 * Math.PI) / 20;
var r = Math.random() * 3 + 1;
var newPoint = new OpenLayers.Geometry.Point(x + (r * Math.cos(a)),
y + (r * Math.sin(a)));
pointList.push(newPoint);
}
pointList.push(pointList[0]);
features[i] = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LinearRing(pointList));
}
vectorLayer.addFeatures(features);
var select = document.getElementById("renderers");
var renderers = OpenLayers.Layer.Vector.prototype.renderers;
var option;
for (var i=0, len=renderers.length; i<len; i++) {
if (OpenLayers.Renderer[renderers[i]].prototype.supported()) {
option = document.createElement("option");
option.textContent = renderers[i];
option.value = renderers[i];
option.selected = renderers[i] == vectorLayer.renderer.CLASS_NAME.split(".").pop();
select.appendChild(option);
}
}
select.onchange = function() {
window.location.href = window.location.href.split("?")[0] +
"?renderer=" + select.options[select.selectedIndex].value;
}
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