import defaultValue from '../Core/defaultValue.js';
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import defined from '../Core/defined.js';
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import DeveloperError from '../Core/DeveloperError.js';
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import Event from '../Core/Event.js';
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import createPropertyDescriptor from './createPropertyDescriptor.js';
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/**
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* Describes a two dimensional icon located at the position of the containing {@link Entity}.
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* <p>
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* <div align='center'>
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* <img src='Images/Billboard.png' width='400' height='300' /><br />
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* Example billboards
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* </div>
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* </p>
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*
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* @alias BillboardGraphics
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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.show=true] A boolean Property specifying the visibility of the billboard.
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* @param {Property} [options.image] A Property specifying the Image, URI, or Canvas to use for the billboard.
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* @param {Property} [options.scale=1.0] A numeric Property specifying the scale to apply to the image size.
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* @param {Property} [options.pixelOffset=Cartesian2.ZERO] A {@link Cartesian2} Property specifying the pixel offset.
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* @param {Property} [options.eyeOffset=Cartesian3.ZERO] A {@link Cartesian3} Property specifying the eye offset.
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* @param {Property} [options.horizontalOrigin=HorizontalOrigin.CENTER] A Property specifying the {@link HorizontalOrigin}.
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* @param {Property} [options.verticalOrigin=VerticalOrigin.CENTER] A Property specifying the {@link VerticalOrigin}.
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* @param {Property} [options.heightReference=HeightReference.NONE] A Property specifying what the height is relative to.
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* @param {Property} [options.color=Color.WHITE] A Property specifying the tint {@link Color} of the image.
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* @param {Property} [options.rotation=0] A numeric Property specifying the rotation about the alignedAxis.
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* @param {Property} [options.alignedAxis=Cartesian3.ZERO] A {@link Cartesian3} Property specifying the unit vector axis of rotation.
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* @param {Property} [options.sizeInMeters] A boolean Property specifying whether this billboard's size should be measured in meters.
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* @param {Property} [options.width] A numeric Property specifying the width of the billboard in pixels, overriding the native size.
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* @param {Property} [options.height] A numeric Property specifying the height of the billboard in pixels, overriding the native size.
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* @param {Property} [options.scaleByDistance] A {@link NearFarScalar} Property used to scale the point based on distance from the camera.
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* @param {Property} [options.translucencyByDistance] A {@link NearFarScalar} Property used to set translucency based on distance from the camera.
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* @param {Property} [options.pixelOffsetScaleByDistance] A {@link NearFarScalar} Property used to set pixelOffset based on distance from the camera.
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* @param {Property} [options.imageSubRegion] A Property specifying a {@link BoundingRectangle} that defines a sub-region of the image to use for the billboard, rather than the entire image, measured in pixels from the bottom-left.
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* @param {Property} [options.distanceDisplayCondition] A Property specifying at what distance from the camera that this billboard will be displayed.
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* @param {Property} [options.disableDepthTestDistance] A Property specifying the distance from the camera at which to disable the depth test to.
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*
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* @demo {@link https://sandcastle.cesium.com/index.html?src=Billboards.html|Cesium Sandcastle Billboard Demo}
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*/
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function BillboardGraphics(options) {
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this._definitionChanged = new Event();
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this._show = undefined;
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this._showSubscription = undefined;
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this._image = undefined;
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this._imageSubscription = undefined;
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this._scale = undefined;
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this._scaleSubscription = undefined;
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this._pixelOffset = undefined;
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this._pixelOffsetSubscription = undefined;
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this._eyeOffset = undefined;
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this._eyeOffsetSubscription = undefined;
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this._horizontalOrigin = undefined;
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this._horizontalOriginSubscription = undefined;
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this._verticalOrigin = undefined;
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this._verticalOriginSubscription = undefined;
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this._heightReference = undefined;
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this._heightReferenceSubscription = undefined;
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this._color = undefined;
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this._colorSubscription = undefined;
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this._rotation = undefined;
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this._rotationSubscription = undefined;
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this._alignedAxis = undefined;
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this._alignedAxisSubscription = undefined;
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this._sizeInMeters = undefined;
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this._sizeInMetersSubscription = undefined;
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this._width = undefined;
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this._widthSubscription = undefined;
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this._height = undefined;
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this._heightSubscription = undefined;
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this._scaleByDistance = undefined;
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this._scaleByDistanceSubscription = undefined;
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this._translucencyByDistance = undefined;
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this._translucencyByDistanceSubscription = undefined;
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this._pixelOffsetScaleByDistance = undefined;
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this._pixelOffsetScaleByDistanceSubscription = undefined;
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this._imageSubRegion = undefined;
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this._imageSubRegionSubscription = undefined;
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this._distanceDisplayCondition = undefined;
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this._distanceDisplayConditionSubscription = undefined;
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this._disableDepthTestDistance = undefined;
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this._disableDepthTestDistanceSubscription = undefined;
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this.merge(defaultValue(options, defaultValue.EMPTY_OBJECT));
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}
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Object.defineProperties(BillboardGraphics.prototype, {
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/**
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* Gets the event that is raised whenever a property or sub-property is changed or modified.
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* @memberof BillboardGraphics.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 boolean Property specifying the visibility of the billboard.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default true
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*/
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show : createPropertyDescriptor('show'),
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/**
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* Gets or sets the Property specifying the Image, URI, or Canvas to use for the billboard.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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image : createPropertyDescriptor('image'),
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/**
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* Gets or sets the numeric Property specifying the uniform scale to apply to the image.
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* A scale greater than <code>1.0</code> enlarges the billboard while a scale less than <code>1.0</code> shrinks it.
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* <p>
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* <div align='center'>
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* <img src='Images/Billboard.setScale.png' width='400' height='300' /><br/>
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* From left to right in the above image, the scales are <code>0.5</code>, <code>1.0</code>, and <code>2.0</code>.
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* </div>
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* </p>
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default 1.0
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*/
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scale : createPropertyDescriptor('scale'),
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/**
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* Gets or sets the {@link Cartesian2} Property specifying the billboard's pixel offset in screen space
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* from the origin of this billboard. This is commonly used to align multiple billboards and labels at
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* the same position, e.g., an image and text. The screen space origin is the top, left corner of the
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* canvas; <code>x</code> increases from left to right, and <code>y</code> increases from top to bottom.
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* <p>
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* <div align='center'>
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* <table border='0' cellpadding='5'><tr>
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* <td align='center'><code>default</code><br/><img src='Images/Billboard.setPixelOffset.default.png' width='250' height='188' /></td>
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* <td align='center'><code>b.pixeloffset = new Cartesian2(50, 25);</code><br/><img src='Images/Billboard.setPixelOffset.x50y-25.png' width='250' height='188' /></td>
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* </tr></table>
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* The billboard's origin is indicated by the yellow point.
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* </div>
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* </p>
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default Cartesian2.ZERO
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*/
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pixelOffset : createPropertyDescriptor('pixelOffset'),
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/**
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* Gets or sets the {@link Cartesian3} Property specifying the billboard's offset in eye coordinates.
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* Eye coordinates is a left-handed coordinate system, where <code>x</code> points towards the viewer's
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* right, <code>y</code> points up, and <code>z</code> points into the screen.
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* <p>
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* An eye offset is commonly used to arrange multiple billboards or objects at the same position, e.g., to
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* arrange a billboard above its corresponding 3D model.
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* </p>
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* Below, the billboard is positioned at the center of the Earth but an eye offset makes it always
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* appear on top of the Earth regardless of the viewer's or Earth's orientation.
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* <p>
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* <div align='center'>
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* <table border='0' cellpadding='5'><tr>
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* <td align='center'><img src='Images/Billboard.setEyeOffset.one.png' width='250' height='188' /></td>
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* <td align='center'><img src='Images/Billboard.setEyeOffset.two.png' width='250' height='188' /></td>
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* </tr></table>
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* <code>b.eyeOffset = new Cartesian3(0.0, 8000000.0, 0.0);</code>
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* </div>
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* </p>
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default Cartesian3.ZERO
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*/
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eyeOffset : createPropertyDescriptor('eyeOffset'),
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/**
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* Gets or sets the Property specifying the {@link HorizontalOrigin}.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default HorizontalOrigin.CENTER
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*/
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horizontalOrigin : createPropertyDescriptor('horizontalOrigin'),
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/**
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* Gets or sets the Property specifying the {@link VerticalOrigin}.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default VerticalOrigin.CENTER
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*/
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verticalOrigin : createPropertyDescriptor('verticalOrigin'),
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/**
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* Gets or sets the Property specifying the {@link HeightReference}.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default HeightReference.NONE
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*/
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heightReference : createPropertyDescriptor('heightReference'),
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/**
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* Gets or sets the Property specifying the {@link Color} that is multiplied with the <code>image</code>.
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* This has two common use cases. First, the same white texture may be used by many different billboards,
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* each with a different color, to create colored billboards. Second, the color's alpha component can be
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* used to make the billboard translucent as shown below. An alpha of <code>0.0</code> makes the billboard
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* transparent, and <code>1.0</code> makes the billboard opaque.
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* <p>
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* <div align='center'>
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* <table border='0' cellpadding='5'><tr>
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* <td align='center'><code>default</code><br/><img src='Images/Billboard.setColor.Alpha255.png' width='250' height='188' /></td>
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* <td align='center'><code>alpha : 0.5</code><br/><img src='Images/Billboard.setColor.Alpha127.png' width='250' height='188' /></td>
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* </tr></table>
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* </div>
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* </p>
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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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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* Gets or sets the numeric Property specifying the rotation of the image
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* counter clockwise from the <code>alignedAxis</code>.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default 0
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*/
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rotation : createPropertyDescriptor('rotation'),
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/**
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* Gets or sets the {@link Cartesian3} Property specifying the unit vector axis of rotation
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* in the fixed frame. When set to Cartesian3.ZERO the rotation is from the top of the screen.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default Cartesian3.ZERO
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*/
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alignedAxis : createPropertyDescriptor('alignedAxis'),
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/**
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* Gets or sets the boolean Property specifying if this billboard's size will be measured in meters.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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* @default false
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*/
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sizeInMeters : createPropertyDescriptor('sizeInMeters'),
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/**
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* Gets or sets the numeric Property specifying the width of the billboard in pixels.
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* When undefined, the native width is used.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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width : createPropertyDescriptor('width'),
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/**
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* Gets or sets the numeric Property specifying the height of the billboard in pixels.
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* When undefined, the native height is used.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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height : createPropertyDescriptor('height'),
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/**
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* Gets or sets {@link NearFarScalar} Property specifying the scale of the billboard based on the distance from the camera.
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* A billboard's scale will interpolate between the {@link NearFarScalar#nearValue} and
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* {@link NearFarScalar#farValue} while the camera distance falls within the upper and lower bounds
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* of the specified {@link NearFarScalar#near} and {@link NearFarScalar#far}.
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* Outside of these ranges the billboard's scale remains clamped to the nearest bound.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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scaleByDistance : createPropertyDescriptor('scaleByDistance'),
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/**
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* Gets or sets {@link NearFarScalar} Property specifying the translucency of the billboard based on the distance from the camera.
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* A billboard's translucency will interpolate between the {@link NearFarScalar#nearValue} and
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* {@link NearFarScalar#farValue} while the camera distance falls within the upper and lower bounds
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* of the specified {@link NearFarScalar#near} and {@link NearFarScalar#far}.
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* Outside of these ranges the billboard's translucency remains clamped to the nearest bound.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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translucencyByDistance : createPropertyDescriptor('translucencyByDistance'),
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/**
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* Gets or sets {@link NearFarScalar} Property specifying the pixel offset of the billboard based on the distance from the camera.
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* A billboard's pixel offset will interpolate between the {@link NearFarScalar#nearValue} and
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* {@link NearFarScalar#farValue} while the camera distance falls within the upper and lower bounds
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* of the specified {@link NearFarScalar#near} and {@link NearFarScalar#far}.
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* Outside of these ranges the billboard's pixel offset remains clamped to the nearest bound.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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pixelOffsetScaleByDistance : createPropertyDescriptor('pixelOffsetScaleByDistance'),
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/**
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* Gets or sets the Property specifying a {@link BoundingRectangle} that defines a
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* sub-region of the <code>image</code> to use for the billboard, rather than the entire image,
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* measured in pixels from the bottom-left.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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imageSubRegion : createPropertyDescriptor('imageSubRegion'),
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/**
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* Gets or sets the {@link DistanceDisplayCondition} Property specifying at what distance from the camera that this billboard will be displayed.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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distanceDisplayCondition : createPropertyDescriptor('distanceDisplayCondition'),
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/**
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* Gets or sets the distance from the camera at which to disable the depth test to, for example, prevent clipping against terrain.
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* When set to zero, the depth test is always applied. When set to Number.POSITIVE_INFINITY, the depth test is never applied.
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* @memberof BillboardGraphics.prototype
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* @type {Property}
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*/
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disableDepthTestDistance : createPropertyDescriptor('disableDepthTestDistance')
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});
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/**
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* Duplicates this instance.
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*
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* @param {BillboardGraphics} [result] The object onto which to store the result.
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* @returns {BillboardGraphics} The modified result parameter or a new instance if one was not provided.
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*/
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BillboardGraphics.prototype.clone = function(result) {
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if (!defined(result)) {
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return new BillboardGraphics(this);
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}
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result.show = this._show;
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result.image = this._image;
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result.scale = this._scale;
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result.pixelOffset = this._pixelOffset;
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result.eyeOffset = this._eyeOffset;
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result.horizontalOrigin = this._horizontalOrigin;
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result.verticalOrigin = this._verticalOrigin;
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result.heightReference = this._heightReference;
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result.color = this._color;
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result.rotation = this._rotation;
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result.alignedAxis = this._alignedAxis;
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result.sizeInMeters = this._sizeInMeters;
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result.width = this._width;
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result.height = this._height;
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result.scaleByDistance = this._scaleByDistance;
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result.translucencyByDistance = this._translucencyByDistance;
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result.pixelOffsetScaleByDistance = this._pixelOffsetScaleByDistance;
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result.imageSubRegion = this._imageSubRegion;
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result.distanceDisplayCondition = this._distanceDisplayCondition;
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result.disableDepthTestDistance = this._disableDepthTestDistance;
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return result;
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};
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/**
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* Assigns each unassigned property on this object to the value
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* of the same property on the provided source object.
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*
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* @param {BillboardGraphics} source The object to be merged into this object.
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*/
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BillboardGraphics.prototype.merge = function(source) {
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//>>includeStart('debug', pragmas.debug);
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if (!defined(source)) {
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throw new DeveloperError('source is required.');
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}
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//>>includeEnd('debug');
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this.show = defaultValue(this._show, source.show);
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this.image = defaultValue(this._image, source.image);
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this.scale = defaultValue(this._scale, source.scale);
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this.pixelOffset = defaultValue(this._pixelOffset, source.pixelOffset);
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this.eyeOffset = defaultValue(this._eyeOffset, source.eyeOffset);
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this.horizontalOrigin = defaultValue(this._horizontalOrigin, source.horizontalOrigin);
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this.verticalOrigin = defaultValue(this._verticalOrigin, source.verticalOrigin);
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this.heightReference = defaultValue(this._heightReference, source.heightReference);
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this.color = defaultValue(this._color, source.color);
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this.rotation = defaultValue(this._rotation, source.rotation);
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this.alignedAxis = defaultValue(this._alignedAxis, source.alignedAxis);
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this.sizeInMeters = defaultValue(this._sizeInMeters, source.sizeInMeters);
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this.width = defaultValue(this._width, source.width);
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this.height = defaultValue(this._height, source.height);
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this.scaleByDistance = defaultValue(this._scaleByDistance, source.scaleByDistance);
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this.translucencyByDistance = defaultValue(this._translucencyByDistance, source.translucencyByDistance);
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this.pixelOffsetScaleByDistance = defaultValue(this._pixelOffsetScaleByDistance, source.pixelOffsetScaleByDistance);
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this.imageSubRegion = defaultValue(this._imageSubRegion, source.imageSubRegion);
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this.distanceDisplayCondition = defaultValue(this._distanceDisplayCondition, source.distanceDisplayCondition);
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this.disableDepthTestDistance = defaultValue(this._disableDepthTestDistance, source.disableDepthTestDistance);
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};
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export default BillboardGraphics;
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