<!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%;
}
.canvas {
position: absolute;
left: 10px;
top: 10px;
display: none;
}
#canvas-a {
top: 10px;
}
#canvas-b {
top: 120px;
}
.bmgl-widget-credits{display:none}
</style>
<title>part_test</title>
</head>
<body>
<canvas id="canvas-a" class="canvas" width="700" height="100"></canvas>
<canvas id="canvas-b" class="canvas" width="700" height="100"></canvas>
<div id='container'></div>
<script>
bmgl.Config.HTTP_URL = 'http://bigemap.com:9000';
var viewer = new bmgl.Viewer('container', {mapId: 'bigemap.zhongkexingtu'});
//设置初始位置
viewer.camera.setView({
destination: bmgl.Cartesian3.fromDegrees(110.20, 34.55, 3000000)
});
//不启用地形遮挡
viewer.scene.globe.depthTestAgainstTerrain=false;
//取消双击事件
viewer.BMWidget.screenSpaceEventHandler.removeInputAction(bmgl.ScreenSpaceEventType.LEFT_DOUBLE_CLICK);
viewer.entities.add({
name: 'Red wall at height',
wall: {
positions: bmgl.Cartesian3.fromDegreesArrayHeights([
121.444409, 31.247417, 200.0,
121.533521, 31.235685, 200.0,
121.563273, 31.190347, 200.0,
121.546744, 31.194054, 200.0,
121.516705, 31.191459, 200.0,
121.502188, 31.203074, 200.0
]),
minimumHeights: [3000.0, 2000.0, 2000, 2000, 2000, 3000],
material: getColorRamp([0.0, 0.045, 0.1, 0.15, 0.37, 0.54, 1.0], true)
}
});
viewer.entities.add({
name: 'Red wall at height',
wall: {
positions: bmgl.Cartesian3.fromDegreesArrayHeights([
121.554409, 31.247417, 200.0,
121.643521, 31.235685, 200.0,
121.673273, 31.190347, 200.0,
121.656744, 31.194054, 200.0,
121.626705, 31.191459, 200.0,
121.612188, 31.203074, 200.0
]),
minimumHeights: [3000.0, 2000.0, 2000, 2000, 2000, 3000],
material: getColorRamp([0.0, 0.045, 0.1, 0.15, 0.37, 0.54, 1.0], false)
}
});
viewer.zoomTo(viewer.entities);
function getColorRamp(elevationRamp, isVertical = true) {
let ramp = document.createElement('canvas');
ramp.width = isVertical ? 1 : 100;
ramp.height = isVertical ? 100 : 1;
let ctx = ramp.getContext('2d');
let values = elevationRamp;
let grd = isVertical ? ctx.createLinearGradient(0, 0, 0, 100) : ctx.createLinearGradient(0, 0, 100, 0);
grd.addColorStop(values[0], '#000000'); //black
grd.addColorStop(values[1], '#2747E0'); //blue
grd.addColorStop(values[2], '#D33B7D'); //pink
grd.addColorStop(values[3], '#D33038'); //red
grd.addColorStop(values[4], '#FF9742'); //orange
grd.addColorStop(values[5], '#ffd700'); //yellow
grd.addColorStop(values[6], '#ffffff'); //white
ctx.fillStyle = grd;
if (isVertical)
ctx.fillRect(0, 0, 1, 100);
else
ctx.fillRect(0, 0, 100, 1);
return ramp;
}
</script>
</body>
</html>
源码