new Cesium.VelocityVectorProperty(position, normalize)

A Property which evaluates to a Cartesian3 vector based on the velocity of the provided PositionProperty.
Name Type Default Description
position Property optional The position property used to compute the velocity.
normalize Boolean true optional Whether to normalize the computed velocity vector.
//Create an entity with a billboard rotated to match its velocity.
var position = new Cesium.SampledProperty();
var entity = viewer.entities.add({
  position : position,
  billboard : {
    image : 'image.png',
    alignedAxis : new Cesium.VelocityVectorProperty(position, true) // alignedAxis must be a unit vector


readonlydefinitionChanged : Event

Gets the event that is raised whenever the definition of this property changes.

readonlyisConstant : Boolean

Gets a value indicating if this property is constant.
Gets or sets whether the vector produced by this property will be normalized or not.
Gets or sets the position property used to compute the velocity vector.



Compares this property to the provided property and returns true if they are equal, false otherwise.
Name Type Description
other Property optional The other property.
true if left and right are equal, false otherwise.
Gets the value of the property at the provided time.
Name Type Description
time JulianDate optional The time for which to retrieve the value.
result Cartesian3 optional 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.