<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
<meta name="description" content="Create and style textual labels.">
<meta name="cesium-sandcastle-labels" content="Showcases">
<title>Labels</title>
<script type="text/javascript" src="../Sandcastle-header.js"></script>
<script type="text/javascript" src="../../../ThirdParty/requirejs-2.1.20/require.js"></script>
<script type="text/javascript">
require.config({
baseUrl : '../../../Source',
waitSeconds : 60
});
</script>
</head>
<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
<style>
@import url(../templates/bucket.css);
</style>
<div id="cesiumContainer" class="fullSize"></div>
<div id="loadingOverlay"><h1>Loading...</h1></div>
<div id="toolbar"></div>
<script id="cesium_sandcastle_script">
function startup(Cesium){
'use strict';
// Sandcastle_Begin
let viewer = new Cesium.Viewer('cesiumContainer');
function addLabel() {
Sandcastle.declare(addLabel);
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
label : {
text : 'Philadelphia'
}
});
}
function setFont() {
Sandcastle.declare(setFont);
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
label : {
text : 'Philadelphia', // 文本。
font : '24px Helvetica',
fillColor : Cesium.Color.SKYBLUE, // 填充颜色。
outlineColor : Cesium.Color.BLACK, // 轮廓颜色。
outlineWidth : 2, // 轮廓宽度。
style : Cesium.LabelStyle.FILL_AND_OUTLINE // 样式。
}
});
}
function setProperties() {
Sandcastle.declare(setProperties);
let entity = viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222, 300000.0),
label : {
text : 'Philadelphia'
}
});
entity.label.scale = 2.0; // 放大到原来的2倍。
entity.label.showBackground = true; // 展示背景。
}
function offsetByDistance() {
Sandcastle.declare(offsetByDistance);
let image = new Image();
image.onload = function() {
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
billboard : {
// 按距离缩放billboard。
// billboard距离相机1.5e2米时，其大小是原来的5倍；1.5e7米时, 是0.5倍。
scaleByDistance : new Cesium.NearFarScalar(1.5e2, 5.0, 1.5e7, 0.5),
image : image
},
label : {
text : 'Label on top of scaling billboard',
font : '20px sans-serif',
showBackground : true,
horizontalOrigin : Cesium.HorizontalOrigin.CENTER,
pixelOffset : new Cesium.Cartesian2(0.0, -image.height),
// 根据距相机的距离设置像素偏移量。(水平)
// label距离相机1.5e2米时，其沿x正向偏移3.0px; 1.5e7米时，正向偏移0.5。
pixelOffsetScaleByDistance : new Cesium.NearFarScalar(1.5e2, 3.0, 1.5e7, 0.5)
}
});
};
image.src = '../images/facility.gif';
}
function fadeByDistance() {
Sandcastle.declare(fadeByDistance);
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-73.94, 40.67),
label : {
text : 'New York',
// 根据距离相机的距离设置半透明。
// label距离相机1.5e2米时，不透明；1.5e8米时，透明。
translucencyByDistance : new Cesium.NearFarScalar(1.5e2, 1.0, 1.5e8, 0.0)
}
});
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-84.39, 33.75),
label : {
text : 'Atlanta',
translucencyByDistance : new Cesium.NearFarScalar(1.5e5, 1.0, 1.5e7, 0.0)
}
});
}
function scaleByDistance() {
Sandcastle.declare(scaleByDistance);
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
label : {
text : 'Philadelphia',
// 根据距摄像机的距离设定缩放。
// new Cesium.NearFarScalar(near, nearValue, far, farValue)
scaleByDistance : new Cesium.NearFarScalar(1.5e2, 2.0, 1.5e7, 0.5)
}
});
}
function setRightToLeft() {
Sandcastle.declare(setRightToLeft);
// 启用从右到左的检测。
//Only needs to be set once at the beginning of the application.
Cesium.Label.enableRightToLeftDetection = true;
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
label : {
text : 'Master (אדון): Hello\nתלמיד (student): שלום'
}
});
}
Sandcastle.addToolbarMenu([
{
text : 'Add label',
onselect : function() {
addLabel();
// 此行代码，经测试没有作用。
// Sandcastle.highlight(addLabel);
}
},
{
text : 'Set font',
onselect : function() {
setFont();
// Sandcastle.highlight(setFont);
}
},
{
text : 'Set properties',
onselect : function() {
setProperties();
// Sandcastle.highlight(setProperties);
}
},
{
text : 'Offset label by distance',
onselect : function() {
offsetByDistance();
// Sandcastle.highlight(offsetByDistance);
}
},
{
text : 'Fade label by distance',
onselect : function() {
fadeByDistance();
// Sandcastle.highlight(fadeByDistance);
}
},
{
text : 'Scale label by distance',
onselect : function() {
scaleByDistance();
// Sandcastle.highlight(scaleByDistance);
}
},
{
text : 'Set label with right-to-left language',
onselect : function() {
setRightToLeft();
// Sandcastle.highlight(setRightToLeft);
}
}
]);
Sandcastle.reset = function() {
// 每次切换标签，移除所有实体。
viewer.entities.removeAll();
};
//Sandcastle_End
Sandcastle.finishedLoading();
}
if (typeof Cesium !== 'undefined') {
startup(Cesium);
}
else if (typeof require === 'function') {
require(['Cesium'], startup);
}
</script>
</body>
</html>
cesium 1.52 demo _ Labels.html
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转载自blog.csdn.net/weixin_42193179/article/details/85782764
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