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import Color from "../Core/Color.js";
import Frozen from "../Core/Frozen.js";
import defined from "../Core/defined.js";
import Event from "../Core/Event.js";
import JulianDate from "../Core/JulianDate.js";
import createPropertyDescriptor from "./createPropertyDescriptor.js";
import Property from "./Property.js";
const defaultEvenColor = Color.WHITE;
const defaultOddColor = Color.BLACK;
const defaultRepeat = new Cartesian2(2.0, 2.0);
/**
* A {@link MaterialProperty} that maps to checkerboard {@link Material} uniforms.
* @alias CheckerboardMaterialProperty
* @constructor
*
* @param {object} [options] Object with the following properties:
* @param {Property|Color} [options.evenColor=Color.WHITE] A Property specifying the first {@link Color}.
* @param {Property|Color} [options.oddColor=Color.BLACK] A Property specifying the second {@link Color}.
* @param {Property|Cartesian2} [options.repeat=new Cartesian2(2.0, 2.0)] A {@link Cartesian2} Property specifying how many times the tiles repeat in each direction.
*/
function CheckerboardMaterialProperty(options) {
options = options ?? Frozen.EMPTY_OBJECT;
this._definitionChanged = new Event();
this._evenColor = undefined;
this._evenColorSubscription = undefined;
this._oddColor = undefined;
this._oddColorSubscription = undefined;
this._repeat = undefined;
this._repeatSubscription = undefined;
this.evenColor = options.evenColor;
this.oddColor = options.oddColor;
this.repeat = options.repeat;
}
Object.defineProperties(CheckerboardMaterialProperty.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 CheckerboardMaterialProperty.prototype
*
* @type {boolean}
* @readonly
*/
isConstant: {
get: function () {
return (
Property.isConstant(this._evenColor) && //
Property.isConstant(this._oddColor) && //
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 CheckerboardMaterialProperty.prototype
*
* @type {Event}
* @readonly
*/
definitionChanged: {
get: function () {
return this._definitionChanged;
},
},
/**
* Gets or sets the Property specifying the first {@link Color}.
* @memberof CheckerboardMaterialProperty.prototype
* @type {Property|undefined}
* @default Color.WHITE
*/
evenColor: createPropertyDescriptor("evenColor"),
/**
* Gets or sets the Property specifying the second {@link Color}.
* @memberof CheckerboardMaterialProperty.prototype
* @type {Property|undefined}
* @default Color.BLACK
*/
oddColor: createPropertyDescriptor("oddColor"),
/**
* Gets or sets the {@link Cartesian2} Property specifying how many times the tiles repeat in each direction.
* @memberof CheckerboardMaterialProperty.prototype
* @type {Property|undefined}
* @default new Cartesian2(2.0, 2.0)
*/
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.
*/
CheckerboardMaterialProperty.prototype.getType = function (time) {
return "Checkerboard";
};
const timeScratch = new JulianDate();
/**
* Gets the value of the property at the provided time.
*
* @param {JulianDate} [time=JulianDate.now()] The time for which to retrieve the value. If omitted, the current system time is used.
* @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.
*/
CheckerboardMaterialProperty.prototype.getValue = function (time, result) {
if (!defined(time)) {
time = JulianDate.now(timeScratch);
}
if (!defined(result)) {
result = {};
}
result.lightColor = Property.getValueOrClonedDefault(
this._evenColor,
time,
defaultEvenColor,
result.lightColor,
);
result.darkColor = Property.getValueOrClonedDefault(
this._oddColor,
time,
defaultOddColor,
result.darkColor,
);
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.
*/
CheckerboardMaterialProperty.prototype.equals = function (other) {
return (
this === other || //
(other instanceof CheckerboardMaterialProperty && //
Property.equals(this._evenColor, other._evenColor) && //
Property.equals(this._oddColor, other._oddColor) && //
Property.equals(this._repeat, other._repeat))
);
};
export default CheckerboardMaterialProperty;
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