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StripeMaterialProperty.js
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StripeMaterialProperty.js
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/*global define*/
define([
'../Core/Color',
'../Core/defaultValue',
'../Core/defined',
'../Core/defineProperties',
'../Core/Event',
'./createPropertyDescriptor',
'./Property',
'./StripeOrientation'
], function(
Color,
defaultValue,
defined,
defineProperties,
Event,
createPropertyDescriptor,
Property,
StripeOrientation) {
"use strict";
var defaultOrientation = StripeOrientation.HORIZONTAL;
var defaultEvenColor = Color.WHITE;
var defaultOddColor = Color.BLACK;
var defaultOffset = 0;
var defaultRepeat = 1;
/**
* A {@link MaterialProperty} that maps to stripe {@link Material} uniforms.
* @alias StripeMaterialProperty
* @constructor
*
* @param {Object} [options] Object with the following properties:
* @param {Property} [options.evenColor=Color.WHITE] A Property specifying the first {@link Color}.
* @param {Property} [options.oddColor=Color.BLACK] A Property specifying the second {@link Color}.
* @param {Property} [options.repeat=1] A numeric Property specifying how many times the stripes repeat.
* @param {Property} [options.offset=0] A numeric Property specifying how far into the pattern to start the material.
* @param {Property} [options.orientation=StripeOrientation.HORIZONTAL] A Property specifying the {@link StripeOrientation}.
*/
var StripeMaterialProperty = function(options) {
options = defaultValue(options, defaultValue.EMPTY_OBJECT);
this._definitionChanged = new Event();
this._orientation = undefined;
this._orientationSubscription = undefined;
this._evenColor = undefined;
this._evenColorSubscription = undefined;
this._oddColor = undefined;
this._oddColorSubscription = undefined;
this._offset = undefined;
this._offsetSubscription = undefined;
this._repeat = undefined;
this._repeatSubscription = undefined;
this.orientation = options.orientation;
this.evenColor = options.evenColor;
this.oddColor = options.oddColor;
this.offset = options.offset;
this.repeat = options.repeat;
};
defineProperties(StripeMaterialProperty.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 StripeMaterialProperty.prototype
*
* @type {Boolean}
* @readonly
*/
isConstant : {
get : function() {
return Property.isConstant(this._orientation) && //
Property.isConstant(this._evenColor) && //
Property.isConstant(this._oddColor) && //
Property.isConstant(this._offset) && //
Property.isConstant(this._repeat);
}
},
/**
* 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 StripeMaterialProperty.prototype
*
* @type {Event}
* @readonly
*/
definitionChanged : {
get : function() {
return this._definitionChanged;
}
},
/**
* Gets or sets the Property specifying the {@link StripeOrientation}/
* @memberof StripeMaterialProperty.prototype
* @type {Property}
* @default StripeOrientation.HORIZONTAL
*/
orientation : createPropertyDescriptor('orientation'),
/**
* Gets or sets the Property specifying the first {@link Color}.
* @memberof StripeMaterialProperty.prototype
* @type {Property}
* @default Color.WHITE
*/
evenColor : createPropertyDescriptor('evenColor'),
/**
* Gets or sets the Property specifying the second {@link Color}.
* @memberof StripeMaterialProperty.prototype
* @type {Property}
* @default Color.BLACK
*/
oddColor : createPropertyDescriptor('oddColor'),
/**
* Gets or sets the numeric Property specifying the point into the pattern
* to begin drawing; with 0.0 being the beginning of the even color, 1.0 the beginning
* of the odd color, 2.0 being the even color again, and any multiple or fractional values
* being in between.
* @memberof StripeMaterialProperty.prototype
* @type {Property}
* @default 0.0
*/
offset : createPropertyDescriptor('offset'),
/**
* Gets or sets the numeric Property specifying how many times the stripes repeat.
* @memberof StripeMaterialProperty.prototype
* @type {Property}
* @default 1.0
*/
repeat : createPropertyDescriptor('repeat')
});
/**
* 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.
*/
StripeMaterialProperty.prototype.getType = function(time) {
return 'Stripe';
};
/**
* 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.
*/
StripeMaterialProperty.prototype.getValue = function(time, result) {
if (!defined(result)) {
result = {};
}
result.horizontal = Property.getValueOrDefault(this._orientation, time, defaultOrientation) === StripeOrientation.HORIZONTAL;
result.evenColor = Property.getValueOrClonedDefault(this._evenColor, time, defaultEvenColor, result.evenColor);
result.oddColor = Property.getValueOrClonedDefault(this._oddColor, time, defaultOddColor, result.oddColor);
result.offset = Property.getValueOrDefault(this._offset, time, defaultOffset);
result.repeat = Property.getValueOrDefault(this._repeat, time, defaultRepeat);
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.
*/
StripeMaterialProperty.prototype.equals = function(other) {
return this === other || //
(other instanceof StripeMaterialProperty && //
Property.equals(this._orientation, other._orientation) && //
Property.equals(this._evenColor, other._evenColor) && //
Property.equals(this._oddColor, other._oddColor) && //
Property.equals(this._offset, other._offset) && //
Property.equals(this._repeat, other._repeat));
};
return StripeMaterialProperty;
});