Class: VelocityVectorProperty

VelocityVectorProperty

new VelocityVectorProperty(positionopt, normalizeopt)

A Property which evaluates to a Cartesian3 vector based on the velocity of the provided PositionProperty.
Parameters:
Name Type Attributes Default Description
position Property <optional>
 The position property used to compute the velocity.
normalize Boolean <optional>
 true Whether to normalize the computed velocity vector.
Source:
Example
//Create an entity with a billboard rotated to match its velocity.
var position = new Cesium.SampledProperty();
position.addSamples(...);
var 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

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

(readonly) isConstant :Boolean

Gets a value indicating if this property is constant.
Type:
  • Boolean
Source:

normalize :Boolean

Gets or sets whether the vector produced by this property will be normalized or not.
Type:
  • Boolean
Source:

position :Property

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

Methods

equals(otheropt) → {Boolean}

Compares this property to the provided property and returns true if they are equal, false otherwise.
Parameters:
Name Type Attributes Description
other Property <optional>
 The other property.
Source:
Returns:
true if left and right are equal, false otherwise.
Type
Boolean

getValue(timeopt, resultopt) → {Cartesian3}

Gets the value of the property at the provided time.
Parameters:
Name Type Attributes 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.
Source:
Returns:
The modified result parameter or a new instance if the result parameter was not supplied.
Type
Cartesian3