/
PolylineGlowMaterialProperty.js
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/
PolylineGlowMaterialProperty.js
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import Color from "../Core/Color.js";
import defaultValue from "../Core/defaultValue.js";
import defined from "../Core/defined.js";
import Event from "../Core/Event.js";
import createPropertyDescriptor from "./createPropertyDescriptor.js";
import Property from "./Property.js";
var defaultColor = Color.WHITE;
var defaultGlowPower = 0.25;
var defaultTaperPower = 1.0;
/**
* A {@link MaterialProperty} that maps to polyline glow {@link Material} uniforms.
* @alias PolylineGlowMaterialProperty
* @constructor
*
* @param {Object} [options] Object with the following properties:
* @param {Property} [options.color=Color.WHITE] A Property specifying the {@link Color} of the line.
* @param {Property} [options.glowPower=0.25] A numeric Property specifying the strength of the glow, as a percentage of the total line width.
* @param {Property} [options.taperPower=1.0] A numeric Property specifying the strength of the tapering effect, as a percentage of the total line length. If 1.0 or higher, no taper effect is used.
*/
function PolylineGlowMaterialProperty(options) {
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
this._definitionChanged = new Event();
this._color = undefined;
this._colorSubscription = undefined;
this._glowPower = undefined;
this._glowPowerSubscription = undefined;
this._taperPower = undefined;
this._taperPowerSubscription = undefined;
this.color = options.color;
this.glowPower = options.glowPower;
this.taperPower = options.taperPower;
}
Object.defineProperties(PolylineGlowMaterialProperty.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 PolylineGlowMaterialProperty.prototype
* @type {Boolean}
* @readonly
*/
isConstant: {
get: function () {
return (
Property.isConstant(this._color) && Property.isConstant(this._glow)
);
},
},
/**
* 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 PolylineGlowMaterialProperty.prototype
* @type {Event}
* @readonly
*/
definitionChanged: {
get: function () {
return this._definitionChanged;
},
},
/**
* Gets or sets the Property specifying the {@link Color} of the line.
* @memberof PolylineGlowMaterialProperty.prototype
* @type {Property}
*/
color: createPropertyDescriptor("color"),
/**
* Gets or sets the numeric Property specifying the strength of the glow, as a percentage of the total line width (less than 1.0).
* @memberof PolylineGlowMaterialProperty.prototype
* @type {Property}
*/
glowPower: createPropertyDescriptor("glowPower"),
/**
* Gets or sets the numeric Property specifying the strength of the tapering effect, as a percentage of the total line length. If 1.0 or higher, no taper effect is used.
* @memberof PolylineGlowMaterialProperty.prototype
* @type {Property}
*/
taperPower: createPropertyDescriptor("taperPower"),
});
/**
* 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.
*/
PolylineGlowMaterialProperty.prototype.getType = function (time) {
return "PolylineGlow";
};
/**
* 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.
*/
PolylineGlowMaterialProperty.prototype.getValue = function (time, result) {
if (!defined(result)) {
result = {};
}
result.color = Property.getValueOrClonedDefault(
this._color,
time,
defaultColor,
result.color
);
result.glowPower = Property.getValueOrDefault(
this._glowPower,
time,
defaultGlowPower,
result.glowPower
);
result.taperPower = Property.getValueOrDefault(
this._taperPower,
time,
defaultTaperPower,
result.taperPower
);
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.
*/
PolylineGlowMaterialProperty.prototype.equals = function (other) {
return (
this === other ||
(other instanceof PolylineGlowMaterialProperty &&
Property.equals(this._color, other._color) &&
Property.equals(this._glowPower, other._glowPower) &&
Property.equals(this._taperPower, other._taperPower))
);
};
export default PolylineGlowMaterialProperty;