import Color from '../Core/Color.js';
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import defined from '../Core/defined.js';
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import Event from '../Core/Event.js';
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import createPropertyDescriptor from './createPropertyDescriptor.js';
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import Property from './Property.js';
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/**
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* A {@link MaterialProperty} that maps to PolylineArrow {@link Material} uniforms.
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*
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* @param {Property} [color=Color.WHITE] The {@link Color} Property to be used.
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*
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* @alias PolylineArrowMaterialProperty
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* @constructor
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*/
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function PolylineArrowMaterialProperty(color) {
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this._definitionChanged = new Event();
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this._color = undefined;
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this._colorSubscription = undefined;
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this.color = color;
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}
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Object.defineProperties(PolylineArrowMaterialProperty.prototype, {
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/**
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* Gets a value indicating if this property is constant. A property is considered
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* constant if getValue always returns the same result for the current definition.
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* @memberof PolylineArrowMaterialProperty.prototype
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*
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* @type {Boolean}
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* @readonly
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*/
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isConstant : {
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get : function() {
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return Property.isConstant(this._color);
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}
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},
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/**
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* Gets the event that is raised whenever the definition of this property changes.
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* The definition is considered to have changed if a call to getValue would return
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* a different result for the same time.
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* @memberof PolylineArrowMaterialProperty.prototype
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*
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* @type {Event}
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* @readonly
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*/
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definitionChanged : {
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get : function() {
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return this._definitionChanged;
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}
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},
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/**
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* Gets or sets the {@link Color} {@link Property}.
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* @memberof PolylineArrowMaterialProperty.prototype
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* @type {Property}
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* @default Color.WHITE
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*/
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color : createPropertyDescriptor('color')
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});
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/**
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* Gets the {@link Material} type at the provided time.
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*
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* @param {JulianDate} time The time for which to retrieve the type.
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* @returns {String} The type of material.
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*/
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PolylineArrowMaterialProperty.prototype.getType = function(time) {
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return 'PolylineArrow';
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};
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/**
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* Gets the value of the property at the provided time.
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*
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* @param {JulianDate} time The time for which to retrieve the value.
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* @param {Object} [result] The object to store the value into, if omitted, a new instance is created and returned.
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* @returns {Object} The modified result parameter or a new instance if the result parameter was not supplied.
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*/
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PolylineArrowMaterialProperty.prototype.getValue = function(time, result) {
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if (!defined(result)) {
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result = {};
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}
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result.color = Property.getValueOrClonedDefault(this._color, time, Color.WHITE, result.color);
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return result;
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};
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/**
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* Compares this property to the provided property and returns
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* <code>true</code> if they are equal, <code>false</code> otherwise.
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*
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* @param {Property} [other] The other property.
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* @returns {Boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
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*/
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PolylineArrowMaterialProperty.prototype.equals = function(other) {
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return this === other || //
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(other instanceof PolylineArrowMaterialProperty && //
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Property.equals(this._color, other._color));
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};
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export default PolylineArrowMaterialProperty;
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