fuyuhang
/
Project_yhfu
mirror de http://121.37.83.100:3000/sooka_onest/sooka_onest_forestfire_vue2_visualization.git


			
				
					
						
						
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							<!--********************************************************************
* Copyright© 2000 - 2021 SuperMap Software Co.Ltd. All rights reserved.
*********************************************************************-->
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title data-i18n="resources.title_AnimationFeature"></title>
    <script type="text/javascript" src="../js/include-web.js"></script>
    <script type="text/javascript" src="../../dist/ol/include-ol.js"></script>
</head>
<body style=" margin: 0;overflow: hidden;background: #fff;width: 100%;height:100%; position: absolute;top: 0;">
<div id="map" style="width: 100%;height:100%"></div>
<script type="text/javascript">
    var url = (window.isLocal ? window.server : "https://iserver.supermap.io")+"/iserver/services/map-china400/rest/maps/China_4326";
    new ol.supermap.MapService(url).getMapInfo(function (serviceResult) {
        var mapJSONObj = serviceResult.result;
        var map = new ol.Map({
            target: 'map',
            controls: ol.control.defaults({attributionOptions: {collapsed: false}})
                .extend([new ol.supermap.control.Logo()]),
            view: new ol.View({
                center: [103, 30],
                zoom: 4,
                projection: 'EPSG:4326',
                multiWorld: true
            })
        });
        var options = ol.source.TileSuperMapRest.optionsFromMapJSON(url, mapJSONObj);
        var layer = new ol.layer.Tile({
            source: new ol.source.TileSuperMapRest(options)
        });
        map.addLayer(layer);

        function addRandomFeature() {
            var xmax = 130, xmin = 80, ymax = 50, ymin = 20;
            var feature = new ol.Feature(new ol.geom.Point([Math.floor(Math.random() * (xmax - xmin + 1) + xmin), Math.floor(Math.random() * (ymax - ymin + 1) + ymin)]));
            source.addFeature(feature);
        }

        function flash(feature) {
            var start = new Date().getTime();
            var listenerKey;

            function animate(event) {
                var duration = 3000;
                // ol6 废除了 event.vectorContext 接口，通过 ol.render.getVectorContext 来获取 vectorContext
                var vectorContext = new ol.render.getVectorContext(event);
                var frameState = event.frameState;
                var flashGeom = feature.getGeometry().clone();
                var elapsed = frameState.time - start;
                var elapsedRatio = elapsed / duration;
                var radius = ol.easing.easeOut(elapsedRatio) * 25 + 5;
                var opacity = ol.easing.easeOut(1 - elapsedRatio);
                var style = new ol.style.Style({
                    image: new ol.style.Circle({
                        radius: radius,
                        stroke: new ol.style.Stroke({
                            color: 'rgba(255, 0, 0, ' + opacity + ')',
                            width: 0.25 + opacity
                        })
                    })
                });
                vectorContext.setStyle(style);
                vectorContext.drawGeometry(flashGeom);
                if (elapsed > duration) {
                    ol.Observable.unByKey(listenerKey);
                    return;
                }
                map.render();
            }

            listenerKey = vector.on('postrender', animate);
        }

        var source = new ol.source.Vector({
            wrapX: false
        });
        source.on('addfeature', function (e) {
            flash(e.feature);
        });
        var vector = new ol.layer.Vector({
            source: source
        });
        map.addLayer(vector);
        window.setInterval(addRandomFeature, 1000);
    });
</script>
</body>
</html>