布告板的封装类
    
| Name | Type | Description | 
|---|---|---|
| position | Position | String | |
| icon | String | Base64 | 图片的内容 | 
Example:
new TS.Billboard("120,30,0","./static/image/image.jpg")
new TS.Billboard("[120,30,0]","./static/image/image.jpg")
new TS.Billboard(new TS.Position(120,30,0),"./static/image/image.jpg")Extends
Members
    获取 或 设置 是否支持穿透选择
- Inherited From:
    获取 或 设置属性
- Inherited From:
    获取CesiumEntity对象
- Inherited From:
    描述
- Inherited From:
    获取 或 设置 是否可编辑
- Inherited From:
    获取 或 设置 icon
    获取 name
- Inherited From:
    获取父类
- Inherited From:
onMouseClick : Event
    鼠标点击订阅
- Inherited From:
onMouseDBClick : Event
    鼠标双击订阅
- Inherited From:
onMouseLeave : Event
    鼠标离开订阅
- Inherited From:
onMouseOver : Event
    鼠标悬浮订阅
- Inherited From:
    订阅鼠标右键点击
- Inherited From:
onOverlayAdded : Event
    覆盖物添加订阅
- Inherited From:
onOverlayRemoved : Event
    覆盖物移除订阅
- Inherited From:
    获取底层Id
- Inherited From:
    获取 或 设置 坐标点
    获取 或 设置是否显示
- Inherited From:
    获取 或 设置 布告板的大小
state : State
    获取状态
- Inherited From:
Methods
static TS.Billboard.fromEntity(entity) → Billboard
    从Entity中获取
    
| Name | Type | Description | 
|---|---|---|
| entity | Cesium.Entity | 
Returns:
addTo(layer) → Overlay
    快速添加到图层中
    
| Name | Type | Description | 
|---|---|---|
| layer | Layer | 
Returns:
- Inherited From:
delete() → Overlay
    删除图层
Returns:
- Inherited From:
    飞行到覆盖物
- Inherited From:
setBottomCircle(radius, style, rotateAmount) → Billboard
    设置底面范围圆
    
| Name | Type | Description | 
|---|---|---|
| radius | Number | 半径 | 
| style | Style | 可选的 圆样式,参考CesiumEllipse | 
| rotateAmount | Number | 可选的 动画 | 
Returns:
setLabel(text, textStyle) → Overlay
    设置Label
    
| Name | Type | Description | 
|---|---|---|
| text | stirng | |
| textStyle | 
Returns:
- Inherited From:
setStyle(style) → Billboard
    设置样式
    
| Name | Type | Description | 
|---|---|---|
| style | Cesium.BillboardGraphics.ConstructorOptions | 样式对象 | 
Returns:
Example:
{
  "scale": 1, //比例
  "pixelOffset": { "x": 0, "y": 0 }, //偏移像素
  "rotation": 0, //旋转角度
  "translucencyByDistance": {
    "near": 0, //最近距离
    "nearValue": 0, //最近距离值
    "far": 1, //最远距离值
    "farValue": 0 //最远距离值
  }, //根据距离设置透明度
  "scaleByDistance": {
    "near": 0, //最近距离
    "nearValue": 0, //最近距离值
    "far": 1, //最远距离值
    "farValue": 0 //最远距离值
  }, //根据距离设置比例
  "distanceDisplayCondition": {
    "near": 0, //最近距离
    "far": Number.MAX_VALUE //最远距离
  }, //根据距离设置可见
  "disableDepthTestDistance": 0 // 深度检测距离,用于防止剪切地形,设置为零时,将始终应用深度测试。设置为Number.POSITIVE_INFINITY时,永远不会应用深度测试。
}setVLine(style) → Billboard
    设置垂直引线
    
| Name | Type | Description | 
|---|---|---|
| style | PolylineStyle | Cesium Polyline的样式 | 
Returns:
    保存为Geojson
Returns:
- Inherited From:
    缩放到覆盖物
- Inherited From:
