A
DataSource implementation which can be used to manually manage a group of entities.
| Name | Type | Description |
|---|---|---|
name |
String | optional A human-readable name for this instance. |
Example:
const dataSource = new Cesium.CustomDataSource('myData');
const entity = dataSource.entities.add({
position : Cesium.Cartesian3.fromDegrees(1, 2, 0),
billboard : {
image : 'image.png'
}
});
viewer.dataSources.add(dataSource);Members
Billboard或者Label对象重叠检测，开启此项会动态计算、优先显示更靠近视角的billboard或者label，被遮挡的对象不予显示。
changedEvent : Event
Gets an event that will be raised when the underlying data changes.
Gets or sets the clock for this instance.
clustering : EntityCluster
Gets or sets the clustering options for this data source. This object can be shared between multiple data sources.
Gets the collection of
Entity instances.
errorEvent : Event
Gets an event that will be raised if an error is encountered during processing.
重叠检测参数，Billboard或者Label类型对象包围盒的外延像素大小
Gets or sets whether the data source is currently loading data.
loadingEvent : Event
Gets an event that will be raised when the data source either starts or stops loading.
Gets or sets a human-readable name for this instance.
Gets whether or not this data source should be displayed.
Methods
查询视口是否显示
| Name | Type | Description |
|---|---|---|
index |
Number | 视口索引号，最大值为8，索引号从下到上，左右往返排序 |
数据显示视口设置
| Name | Type | Description |
|---|---|---|
index |
Number | 视口索引号，最大值为8，索引号从下到上，左右往返排序 |
visible |
Boolean | 是否显示,默认值为true |
多视口显示设置，可设置该数据仅在指定的视口索引显示或隐藏，index可以为具体值也可为数组，当index为undefined时，该数据在所有窗口显示或隐藏
| Name | Type | Description |
|---|---|---|
index |
Number | Array | 视口的索引值 |
visible |
Boolean | 显示/隐藏，默认为ture |
Example:
obj.setVisibleAtViewportOnly([0,2,4], false);//设置对象仅在0,2,4视口隐藏，其他窗口显示
obj.setVisibleAtViewportOnly([0,1,2,6], true);//设置对象仅在0,1,2,6视口显示，其他窗口隐藏
obj.setVisibleAtViewportOnly(undefined, true);//设置对象仅在所有视口都显示
Updates the data source to the provided time. This function is optional and
is not required to be implemented. It is provided for data sources which
retrieve data based on the current animation time or scene state.
If implemented, update will be called by
DataSourceDisplay once a frame.
| Name | Type | Description |
|---|---|---|
time |
JulianDate | The simulation time. |
Returns:
True if this data source is ready to be displayed at the provided time, false otherwise.