<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta
name="viewport"
content="initial-scale=1,maximum-scale=1,user-scalable=no"
/>
<title>使用ArcGIS JS API与Tween.js实现图层闪烁动画效果</title>
<link
rel="stylesheet"
href="https://js.arcgis.com/4.24/esri/themes/light/main.css"
/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/tween.js/18.6.4/tween.umd.js"></script>
<script src="https://js.arcgis.com/4.24/"></script>
<style>
#viewDiv {
position: absolute;
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
</style>
<script>
require([
'esri/Map',
'esri/views/MapView',
'esri/Graphic',
'esri/layers/GraphicsLayer',
'esri/geometry/Point',
'esri/symbols/SimpleMarkerSymbol',
'dojo/domReady!',
], function (
Map,
MapView,
Graphic,
GraphicsLayer,
Point,
SimpleMarkerSymbol
) {
// 创建地图
const map = new Map({
basemap: 'streets-navigation-vector',
});
// 创建场景
const view = new MapView({
container: 'viewDiv',
map: map,
zoom: 12,
center: [-118.2437, 34.0522],
});
// 创建图层
const graphicsLayer = new GraphicsLayer();
map.add(graphicsLayer);
// 创建点
const point = new Point({
x: -118.2437,
y: 34.0522,
spatialReference: view.spatialReference,
});
// 创建符号
const markerSymbol = new SimpleMarkerSymbol({
color: [255, 0, 0],
size: '40px',
outline: {
color: [255, 255, 255],
width: 1,
},
});
// 创建点符合
const graphic = new Graphic({
geometry: point,
symbol: markerSymbol,
});
graphicsLayer.add(graphic);
// 创建Tween动画
const options = { opacity: 1 };
const tween = new TWEEN.Tween(options)
.to({ opacity: 0 }, 1000)
.easing(TWEEN.Easing.Quadratic.Out) // 变化函数
.repeat(Infinity) // 无限循环
.yoyo(true) // 动画在循环时反转方向
.onUpdate(function () {
graphicsLayer.opacity = options.opacity;
});
tween.start();
// 循环动画
function animate(time) {
requestAnimationFrame(animate);
TWEEN.update(time);
}
requestAnimationFrame(animate);
});
</script>
</head>
<body>
<div id="viewDiv"></div>
</body>
</html>
