new Cesium.VelocityOrientationProperty(position, ellipsoid)

A Property which evaluates to a Quaternion rotation based on the velocity of the provided PositionProperty.
参数名称 类型 默认值 描述信息
position PositionProperty 可选 The position property used to compute the orientation.
ellipsoid Ellipsoid Ellipsoid.WGS84 可选 The ellipsoid used to determine which way is up.
//Create an entity with position and orientation.
const position = new Cesium.SampledProperty();
const entity = viewer.entities.add({
  position : position,
  orientation : new Cesium.VelocityOrientationProperty(position)


Gets the event that is raised whenever the definition of this property changes.
Gets or sets the ellipsoid used to determine which way is up.
Gets a value indicating if this property is constant.
Gets or sets the position property used to compute orientation.


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.
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 描述信息
time JulianDate 可选 The time for which to retrieve the value.
result Quaternion 可选 The object to store the value into, if omitted, a new instance is created and returned.
The modified result parameter or a new instance if the result parameter was not supplied.