126 lines
4.7 KiB
JavaScript
126 lines
4.7 KiB
JavaScript
define([
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'../Core/Color',
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'../Core/defaultValue',
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'../Core/defined',
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'../Core/defineProperties',
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'../Core/Event',
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'./createPropertyDescriptor',
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'./Property'
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], function(
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Color,
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defaultValue,
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defined,
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defineProperties,
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Event,
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createPropertyDescriptor,
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Property) {
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'use strict';
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var defaultColor = Color.WHITE;
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var defaultGlowPower = 0.25;
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/**
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* A {@link MaterialProperty} that maps to polyline glow {@link Material} uniforms.
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* @alias PolylineGlowMaterialProperty
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* @constructor
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*
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* @param {Object} [options] Object with the following properties:
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* @param {Property} [options.color=Color.WHITE] A Property specifying the {@link Color} of the line.
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* @param {Property} [options.glowPower=0.25] A numeric Property specifying the strength of the glow, as a percentage of the total line width.
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*/
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function PolylineGlowMaterialProperty(options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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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._glowPower = undefined;
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this._glowPowerSubscription = undefined;
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this.color = options.color;
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this.glowPower = options.glowPower;
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}
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defineProperties(PolylineGlowMaterialProperty.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 PolylineGlowMaterialProperty.prototype
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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) && Property.isConstant(this._glow);
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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 PolylineGlowMaterialProperty.prototype
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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 Property specifying the {@link Color} of the line.
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* @memberof PolylineGlowMaterialProperty.prototype
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* @type {Property}
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*/
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color : createPropertyDescriptor('color'),
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/**
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* Gets or sets the numeric Property specifying the strength of the glow, as a percentage of the total line width (less than 1.0).
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* @memberof PolylineGlowMaterialProperty.prototype
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* @type {Property}
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*/
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glowPower : createPropertyDescriptor('glowPower')
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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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PolylineGlowMaterialProperty.prototype.getType = function(time) {
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return 'PolylineGlow';
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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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PolylineGlowMaterialProperty.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, defaultColor, result.color);
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result.glowPower = Property.getValueOrDefault(this._glowPower, time, defaultGlowPower, result.glowPower);
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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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PolylineGlowMaterialProperty.prototype.equals = function(other) {
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return this === other || //
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(other instanceof PolylineGlowMaterialProperty && //
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Property.equals(this._color, other._color) &&
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Property.equals(this._glowPower, other._glowPower));
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};
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return PolylineGlowMaterialProperty;
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});
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