97 lines
2.4 KiB
JavaScript
97 lines
2.4 KiB
JavaScript
goog.require('ol.Feature');
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goog.require('ol.Map');
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goog.require('ol.Observable');
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goog.require('ol.View');
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goog.require('ol.control');
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goog.require('ol.easing');
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goog.require('ol.geom.Point');
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goog.require('ol.layer.Tile');
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goog.require('ol.layer.Vector');
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goog.require('ol.proj');
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goog.require('ol.source.OSM');
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goog.require('ol.source.Vector');
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goog.require('ol.style.Circle');
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goog.require('ol.style.Stroke');
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var map = new ol.Map({
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layers: [
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new ol.layer.Tile({
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source: new ol.source.OSM({
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wrapX: false
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})
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})
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],
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controls: ol.control.defaults({
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attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
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collapsible: false
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})
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}),
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renderer: common.getRendererFromQueryString(),
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target: 'map',
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view: new ol.View({
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center: [0, 0],
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zoom: 1
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})
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});
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var source = new ol.source.Vector({
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wrapX: false
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});
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var vector = new ol.layer.Vector({
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source: source
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});
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map.addLayer(vector);
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function addRandomFeature() {
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var x = Math.random() * 360 - 180;
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var y = Math.random() * 180 - 90;
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var geom = new ol.geom.Point(ol.proj.transform([x, y],
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'EPSG:4326', 'EPSG:3857'));
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var feature = new ol.Feature(geom);
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source.addFeature(feature);
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}
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var duration = 3000;
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function flash(feature) {
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var start = new Date().getTime();
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var listenerKey;
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function animate(event) {
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var vectorContext = event.vectorContext;
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var frameState = event.frameState;
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var flashGeom = feature.getGeometry().clone();
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var elapsed = frameState.time - start;
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var elapsedRatio = elapsed / duration;
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// radius will be 5 at start and 30 at end.
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var radius = ol.easing.easeOut(elapsedRatio) * 25 + 5;
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var opacity = ol.easing.easeOut(1 - elapsedRatio);
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var flashStyle = new ol.style.Circle({
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radius: radius,
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snapToPixel: false,
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stroke: new ol.style.Stroke({
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color: 'rgba(255, 0, 0, ' + opacity + ')',
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width: 1,
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opacity: opacity
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})
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});
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vectorContext.setImageStyle(flashStyle);
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vectorContext.drawPointGeometry(flashGeom, null);
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if (elapsed > duration) {
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ol.Observable.unByKey(listenerKey);
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return;
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}
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// tell OL3 to continue postcompose animation
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frameState.animate = true;
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}
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listenerKey = map.on('postcompose', animate);
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}
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source.on('addfeature', function(e) {
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flash(e.feature);
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});
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window.setInterval(addRandomFeature, 1000);
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