A
Property which is defined by a TimeIntervalCollection, where the
data property of each TimeInterval is another Property instance which is
evaluated at the provided time.
使用示例:
const constantProperty = ...;
const sampledProperty = ...;
//Create a composite property from two previously defined properties
//where the property is valid on August 1st, 2012 and uses a constant
//property for the first half of the day and a sampled property for the
//remaining half.
const composite = new Cesium.CompositeProperty();
composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
iso8601 : '2012-08-01T00:00:00.00Z/2012-08-01T12:00:00.00Z',
data : constantProperty
}));
composite.intervals.addInterval(Cesium.TimeInterval.fromIso8601({
iso8601 : '2012-08-01T12:00:00.00Z/2012-08-02T00:00:00.00Z',
isStartIncluded : false,
isStopIncluded : false,
data : sampledProperty
}));参考:
成员(属性)
readonly definitionChanged : Event
Gets the event that is raised whenever the definition of this property changes.
The definition is changed whenever setValue is called with data different
than the current value.
Gets the interval collection.
Gets a value indicating if this property is constant. A property is considered
constant if getValue always returns the same result for the current definition.
方法
Compares this property to the provided property and returns
true if they are equal, false otherwise.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
other |
Property | 可选 The other property. |
返回值:
true if left and right are equal, false otherwise.
Gets the value of the property at the provided time.
| 参数名称 | 类型 | 默认值 | 描述信息 |
|---|---|---|---|
time |
JulianDate |
JulianDate.now()
|
可选 The time for which to retrieve the value. If omitted, the current system time is used. |
result |
object | 可选 The object to store the value into, if omitted, a new instance is created and returned. |
返回值:
The modified result parameter or a new instance if the result parameter was not supplied.