jtBaseApp/node_modules/cesium/Source/DataSources/NodeTransformationProperty.js

import defaultValue from "../Core/defaultValue.js";
import defined from "../Core/defined.js";
import Event from "../Core/Event.js";
import TranslationRotationScale from "../Core/TranslationRotationScale.js";
import createPropertyDescriptor from "./createPropertyDescriptor.js";
import Property from "./Property.js";

const defaultNodeTransformation = new TranslationRotationScale();

/**
 * A {@link Property} that produces {@link TranslationRotationScale} data.
 * @alias NodeTransformationProperty
 * @constructor
 *
 * @param {Object} [options] Object with the following properties:
 * @param {Property|Cartesian3} [options.translation=Cartesian3.ZERO] A {@link Cartesian3} Property specifying the (x, y, z) translation to apply to the node.
 * @param {Property|Quaternion} [options.rotation=Quaternion.IDENTITY] A {@link Quaternion} Property specifying the (x, y, z, w) rotation to apply to the node.
 * @param {Property|Cartesian3} [options.scale=new Cartesian3(1.0, 1.0, 1.0)] A {@link Cartesian3} Property specifying the (x, y, z) scaling to apply to the node.
 */
function NodeTransformationProperty(options) {
  options = defaultValue(options, defaultValue.EMPTY_OBJECT);

  this._definitionChanged = new Event();
  this._translation = undefined;
  this._translationSubscription = undefined;
  this._rotation = undefined;
  this._rotationSubscription = undefined;
  this._scale = undefined;
  this._scaleSubscription = undefined;

  this.translation = options.translation;
  this.rotation = options.rotation;
  this.scale = options.scale;
}

Object.defineProperties(NodeTransformationProperty.prototype, {
  /**
   * Gets a value indicating if this property is constant.  A property is considered
   * constant if getValue always returns the same result for the current definition.
   * @memberof NodeTransformationProperty.prototype
   *
   * @type {Boolean}
   * @readonly
   */
  isConstant: {
    get: function () {
      return (
        Property.isConstant(this._translation) &&
        Property.isConstant(this._rotation) &&
        Property.isConstant(this._scale)
      );
    },
  },

  /**
   * Gets the event that is raised whenever the definition of this property changes.
   * The definition is considered to have changed if a call to getValue would return
   * a different result for the same time.
   * @memberof NodeTransformationProperty.prototype
   *
   * @type {Event}
   * @readonly
   */
  definitionChanged: {
    get: function () {
      return this._definitionChanged;
    },
  },

  /**
   * Gets or sets the {@link Cartesian3} Property specifying the (x, y, z) translation to apply to the node.
   * @memberof NodeTransformationProperty.prototype
   * @type {Property|undefined}
   * @default Cartesian3.ZERO
   */
  translation: createPropertyDescriptor("translation"),

  /**
   * Gets or sets the {@link Quaternion} Property specifying the (x, y, z, w) rotation to apply to the node.
   * @memberof NodeTransformationProperty.prototype
   * @type {Property|undefined}
   * @default Quaternion.IDENTITY
   */
  rotation: createPropertyDescriptor("rotation"),

  /**
   * Gets or sets the {@link Cartesian3} Property specifying the (x, y, z) scaling to apply to the node.
   * @memberof NodeTransformationProperty.prototype
   * @type {Property|undefined}
   * @default new Cartesian3(1.0, 1.0, 1.0)
   */
  scale: createPropertyDescriptor("scale"),
});

/**
 * Gets the value of the property at the provided time.
 *
 * @param {JulianDate} time The time for which to retrieve the value.
 * @param {TranslationRotationScale} [result] The object to store the value into, if omitted, a new instance is created and returned.
 * @returns {TranslationRotationScale} The modified result parameter or a new instance if the result parameter was not supplied.
 */
NodeTransformationProperty.prototype.getValue = function (time, result) {
  if (!defined(result)) {
    result = new TranslationRotationScale();
  }

  result.translation = Property.getValueOrClonedDefault(
    this._translation,
    time,
    defaultNodeTransformation.translation,
    result.translation
  );
  result.rotation = Property.getValueOrClonedDefault(
    this._rotation,
    time,
    defaultNodeTransformation.rotation,
    result.rotation
  );
  result.scale = Property.getValueOrClonedDefault(
    this._scale,
    time,
    defaultNodeTransformation.scale,
    result.scale
  );
  return result;
};

/**
 * Compares this property to the provided property and returns
 * <code>true</code> if they are equal, <code>false</code> otherwise.
 *
 * @param {Property} [other] The other property.
 * @returns {Boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
 */
NodeTransformationProperty.prototype.equals = function (other) {
  return (
    this === other ||
    (other instanceof NodeTransformationProperty &&
      Property.equals(this._translation, other._translation) &&
      Property.equals(this._rotation, other._rotation) &&
      Property.equals(this._scale, other._scale))
  );
};
export default NodeTransformationProperty;