<!DOCTYPE html>
<html>
<head>
<meta charset='UTF-8'/>
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no'/>
<link href='http://bigemap.com:9000/bigemap-gl.js/v1.1.0/Widgets/widgets.css' rel='stylesheet'/>
<script src='http://bigemap.com:9000/bigemap-gl.js/v1.1.0/bigemap-gl.js'></script>
<style>
body {
margin: 0;
padding: 0;
}
#container {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
#add{
position: absolute;
left: 0;
color: #333;
background-color: #f1f1f1;
padding: 15px;
width: 260px;
right: 0;
}
.bmgl-widget-credits{display:none}
</style>
<title>part_test</title>
</head>
<body>
<div id='container'></div>
<div id="add">
这是一个div
</div>
<script>
bmgl.Config.HTTP_URL = 'http://bigemap.com:9000';
var viewer = new bmgl.Viewer('container', {
terrainId: 'bigemap.9af15d8e',
mapId: 'bigemap.zhongkexingtu'
});
var position=bmgl.Cartesian3.fromDegrees(104,30,520);
viewer.camera.setView({
destination:bmgl.Cartesian3.fromDegrees(104,30,20000000)
});
viewer.scene.preRender.addEventListener(function () {
var p_2d=viewer.scene.cartesianToCanvasCoordinates(position);
if (bmgl.defined(p_2d)){
var div_dom=document.getElementById('add');
div_dom.style.left=p_2d.x+'px';
div_dom.style.top=p_2d.y+'px';
var c_p=viewer.scene.camera.position;
if (viewer.scene.globe.ellipsoid.cartesianToCartographic(c_p).height+viewer.scene.globe.ellipsoid.maximumRadius>bmgl.Cartesian3.distance(position,c_p)){
div_dom.style.display='block';
}else{
div_dom.style.display='none';
}
}
});
</script>
</body>
</html>
源码