function CullingVolume(planes) {
  /**
   * Each plane is represented by a Cartesian4 object, where the x, y, and z components
   * define the unit vector normal to the plane, and the w component is the distance of the
   * plane from the origin.
   * @type {Cartesian4[]}
   * @default []
   */
  this.planes = planes ?? [];
}
The culling volume defined by planes.

@alias CullingVolume
@constructor

@param {Cartesian4[]} [planes] An array of clipping planes.