The interface for all
Property objects that define a world
location as a Cartesian3 with an associated ReferenceFrame.
This type defines an interface and cannot be instantiated directly.
成员(属性)
readonly definitionChanged : Event
Gets the event that is raised whenever the definition of this property changes.
The definition is considered to have changed if a call to getValue would return
a different result for the same time.
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.
referenceFrame : ReferenceFrame
Gets the reference frame that the position is defined in.
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.
getValue(time, result) → Cartesian3|undefined
Gets the value of the property at the provided time in the fixed frame.
| 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 |
Cartesian3 | 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.
getValueInReferenceFrame(time, referenceFrame, result) → Cartesian3|undefined
Gets the value of the property at the provided time and in the provided reference frame.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
time |
JulianDate | The time for which to retrieve the value. |
referenceFrame |
ReferenceFrame | The desired referenceFrame of the result. |
result |
Cartesian3 | 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.