KBE3D / KBCore / Cesium / VelocityVectorProperty

类: VelocityVectorProperty

A Property which evaluates to a Cartesian3 vector based on the velocity of the provided PositionProperty.

示例

//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
  }
}));

参数

The position property used to compute the velocity.

参数

Whether to normalize the computed velocity vector.

属性

isConstant

readonly isConstant: boolean

Gets a value indicating if this property is constant.

---

definitionChanged

readonly definitionChanged: Event

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

---

position

position: Property | undefined

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

---

normalize

normalize: boolean

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

方法

getValue()

getValue(time?: JulianDate, result?: Cartesian3): Cartesian3

Gets the value of the property at the provided time.

参数

time?

JulianDate

The time for which to retrieve the value. If omitted, the current system time is used.

result?

Cartesian3

The object to store the value into, if omitted, a new instance is created and returned.

返回

Cartesian3

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

---

equals()

equals(other?: Property): boolean

Compares this property to the provided property and returns <code>true</code> if they are equal, <code>false</code> otherwise.

参数

other?

Property

The other property.

返回

boolean

true if left and right are equal, false otherwise.

构造函数

构造函数

new VelocityVectorProperty(position?: PositionProperty, normalize?: boolean): VelocityVectorProperty

参数

position?

PositionProperty

normalize?

boolean

返回

VelocityVectorProperty