Openlayers实现点闪烁扩散效果

时间：2021-05-26

本文实例为大家分享了Openlayers实现点闪烁扩散效果的具体代码，供大家参考，具体内容如下

点闪烁样式：

DOM的样式实现

/**橙色点扩散闪烁样式*/.point_animation{ background: #ff9900; width: 6px; height: 6px; border: 2px #ff9900 solid; border-radius: 50%; position: absolute;}.point_animation p, .point_animation span{ position: absolute; width: 4px; height: 4px; animation: point_animation 1.5s infinite; box-shadow: 0px 0px 1px #ff9900; margin: 0px; border-radius: 50%;}.point_animation span{ animation-delay: 0.8s;}@keyframes point_animation{ 10% { transform: scale(1); } 100% { transform: scale(8); }}/**红色点扩散闪烁样式*/.css_animation{ height:50px; width:50px; border-radius: 25px; background: rgba(255, 0, 0, 0.9); transform: scale(0); animation: mypoint 3s; animation-iteration-count: infinite;}@keyframes mypoint{ to{ transform: scale(1.5); background: rgba(0, 0, 0, 0); }}

在地图上添加点—采用overlay添加DOM元素

需要用到Openlayers中的overlay元素，官方对于如何使用overlay做出了相关API说明

///创建overlay，element传入的是存在于web中的DOM元素var popup = new ol.Overlay({ element: document.getElementById('popup')});popup.setPosition(coordinate);//设置overlay的位置map.addOverlay(popup);//讲overlay添加到地图上

具体代码

<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>点扩散</title> <link rel="stylesheet" href="https://openlayers.org/en/v3.20.1/css/ol.css" type="text/css"> <script src="https://openlayers.org/en/v3.20.1/build/ol.js"></script> <style> .point_animation{ background: #ff9900; width: 6px; height: 6px; border: 2px #ff9900 solid; border-radius: 50%; position: absolute; } .point_animation p, .point_animation span{ position: absolute; width: 4px; height: 4px; animation: point_animation 1.5s infinite; box-shadow: 0px 0px 1px #ff9900; margin: 0px; border-radius: 50%; } .point_animation span{ animation-delay: 0.8s; } @keyframes point_animation{ 10% { transform: scale(1); } 100% { transform: scale(8); } } .css_animation{ height:50px; width:50px; border-radius: 25px; background: rgba(255, 0, 0, 0.9); transform: scale(0); animation: mypoint 3s; animation-iteration-count: infinite; } @keyframes mypoint{ to{ transform: scale(1.5); background: rgba(0, 0, 0, 0); } } </style></head> <body> <div id="container"></div> <script type="text/javascript"> var baseLayer = new ol.layer.Tile({ source: new ol.source.XYZ({ url: "http://wprd0{1-4}.is.autonavi.com/appmaptile?lang=zh_cn&size=1&style=7&x={x}&y={y}&z={z}", }), }); var map = new ol.Map({ layers: [baseLayer], view: new ol.View({ center: [104.5602,32.4070], projection: 'EPSG:4326', zoom: 4, extent: [-180, -90, 180, 90] }), target: "container", interactions:ol.interaction.defaults({ doubleClickZoom: false }), controls:ol.control.defaults({ zoom:false, attribution: false, }), }); setFlashPoint() function setFlashPoint(){ //第一种样式 var element = document.createElement("div"); element.className = "point_animation"; var p = document.createElement("p"); var span = document.createElement("span"); element.appendChild(p); element.appendChild(span); var point_overlay = new ol.Overlay({ element: element, positioning: 'center-center', }); map.addOverlay(point_overlay); point_overlay.setPosition([120,30]); //第二种样式 var ele = document.createElement("div"); ele.className = "css_animation"; var point_overlay2 = new ol.Overlay({ element: ele, positioning: 'center-center', }); map.addOverlay(point_overlay2); point_overlay2.setPosition([110,30]); } </script></body></html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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