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 solid color {@link Material} uniforms.
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*
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* @param {Property|Color} [color=Color.WHITE] The {@link Color} Property to be used.
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*
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* @alias ColorMaterialProperty
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* @constructor
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*/
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function ColorMaterialProperty(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(ColorMaterialProperty.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 ColorMaterialProperty.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 ColorMaterialProperty.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 ColorMaterialProperty.prototype
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* @type {Property|undefined}
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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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ColorMaterialProperty.prototype.getType = function (time) {
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return "Color";
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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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ColorMaterialProperty.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(
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this._color,
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time,
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Color.WHITE,
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result.color
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);
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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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ColorMaterialProperty.prototype.equals = function (other) {
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return (
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this === other || //
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(other instanceof ColorMaterialProperty && //
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Property.equals(this._color, other._color))
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);
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};
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export default ColorMaterialProperty;
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