VelocityVectorProperty

new Cesium.VelocityVectorProperty(position, normalize)
DataSources/VelocityVectorProperty.js 31

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

Members

readonly definitionChanged : Event
DataSources/VelocityVectorProperty.js 60

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

readonly isConstant : Boolean
DataSources/VelocityVectorProperty.js 48

Gets a value indicating if this property is constant.

normalize : Boolean
DataSources/VelocityVectorProperty.js 104

Gets or sets whether the vector produced by this property will be normalized or not.

position : Property|undefined
DataSources/VelocityVectorProperty.js 71

Gets or sets the position property used to compute the velocity vector.

Methods

equals(other) → Boolean
DataSources/VelocityVectorProperty.js 209

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.
Returns:
true if left and right are equal, false otherwise.

getValue(time, result) → Cartesian3
DataSources/VelocityVectorProperty.js 131

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.
Returns:
The modified result parameter or a new instance if the result parameter was not supplied.