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