地图API_卫星地图_离线地图_地图可视化_离线地图二次开发

下雪效果-源代码示例运行重置
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                    <!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%;
        }
        .bmgl-widget-credits{display:none}
    </style>
    <title>part_test</title>
</head>
<body>
<div id='container'></div>
<script>
         bmgl.Config.HTTP_URL = 'http://bigemap.com:9000';
    var viewer = new bmgl.Viewer('container', {mapId:'bigemap.zhongkexingtu',requestRenderMode:false});
    var lat = 30.6;
    var lon = 104.055;
    //取消双击事件
    viewer.BMWidget.screenSpaceEventHandler.removeInputAction(bmgl.ScreenSpaceEventType.LEFT_DOUBLE_CLICK);
    //设置初始位置
    viewer.camera.setView({
        destination: bmgl.Cartesian3.fromDegrees(lon, lat, 300000)
    });
    //定义下雪场景 着色器
    function FS_Snow() {
        return "uniform sampler2D colorTexture;\n\
    varying vec2 v_textureCoordinates;\n\
\n\
    float snow(vec2 uv,float scale)\n\
    {\n\
        float time = czm_frameNumber / 60.0;\n\
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