235 lines
10 KiB
JavaScript
235 lines
10 KiB
JavaScript
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define([
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'../Core/defaultValue',
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'../Core/defined',
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'../Core/defineProperties',
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'../Core/DeveloperError',
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'../Core/Event',
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'./createMaterialPropertyDescriptor',
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'./createPropertyDescriptor'
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], function(
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defaultValue,
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defined,
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defineProperties,
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DeveloperError,
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Event,
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createMaterialPropertyDescriptor,
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createPropertyDescriptor) {
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'use strict';
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/**
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* Describes a polyline. The first two positions define a line segment,
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* and each additional position defines a line segment from the previous position. The segments
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* can be linear connected points, great arcs, or clamped to terrain.
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*
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* @alias PolylineGraphics
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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.positions] A Property specifying the array of {@link Cartesian3} positions that define the line strip.
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* @param {Property} [options.followSurface=true] A boolean Property specifying whether the line segments should be great arcs or linearly connected.
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* @param {Property} [options.clampToGround=false] A boolean Property specifying whether the Polyline should be clamped to the ground.
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* @param {Property} [options.width=1.0] A numeric Property specifying the width in pixels.
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* @param {Property} [options.show=true] A boolean Property specifying the visibility of the polyline.
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* @param {MaterialProperty} [options.material=Color.WHITE] A Property specifying the material used to draw the polyline.
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* @param {MaterialProperty} [options.depthFailMaterial] A property specifiying the material used to draw the polyline when it is below the terrain.
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* @param {Property} [options.granularity=Cesium.Math.RADIANS_PER_DEGREE] A numeric Property specifying the angular distance between each latitude and longitude if followSurface is true.
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* @param {Property} [options.shadows=ShadowMode.DISABLED] An enum Property specifying whether the polyline casts or receives shadows from each light source.
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* @param {Property} [options.distanceDisplayCondition] A Property specifying at what distance from the camera that this polyline will be displayed.
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* @param {Property} [options.zIndex=0] A Property specifying the zIndex used for ordering ground geometry. Only has an effect if `clampToGround` is true and polylines on terrain is supported.
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*
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* @see Entity
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* @demo {@link https://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=Polyline.html|Cesium Sandcastle Polyline Demo}
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*/
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function PolylineGraphics(options) {
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this._show = undefined;
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this._showSubscription = undefined;
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this._material = undefined;
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this._materialSubscription = undefined;
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this._depthFailMaterial = undefined;
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this._depthFailMaterialSubscription = undefined;
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this._positions = undefined;
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this._positionsSubscription = undefined;
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this._followSurface = undefined;
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this._followSurfaceSubscription = undefined;
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this._clampToGround = undefined;
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this._clampToGroundSubscription = undefined;
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this._granularity = undefined;
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this._granularitySubscription = undefined;
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this._widthSubscription = undefined;
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this._width = undefined;
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this._widthSubscription = undefined;
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this._shadows = undefined;
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this._shadowsSubscription = undefined;
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this._distanceDisplayCondition = undefined;
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this._distanceDisplayConditionSubscription = undefined;
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this._zIndex = undefined;
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this._zIndexSubscription = undefined;
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this._definitionChanged = new Event();
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this.merge(defaultValue(options, defaultValue.EMPTY_OBJECT));
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}
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defineProperties(PolylineGraphics.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 PolylineGraphics.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 polyline.
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* @memberof PolylineGraphics.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 material used to draw the polyline.
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* @memberof PolylineGraphics.prototype
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* @type {MaterialProperty}
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* @default Color.WHITE
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*/
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material : createMaterialPropertyDescriptor('material'),
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/**
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* Gets or sets the Property specifying the material used to draw the polyline when it fails the depth test.
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* <p>
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* Requires the EXT_frag_depth WebGL extension to render properly. If the extension is not supported,
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* there may be artifacts.
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* </p>
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* @memberof PolylineGraphics.prototype
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* @type {MaterialProperty}
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* @default undefined
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*/
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depthFailMaterial : createMaterialPropertyDescriptor('depthFailMaterial'),
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/**
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* Gets or sets the Property specifying the array of {@link Cartesian3}
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* positions that define the line strip.
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* @memberof PolylineGraphics.prototype
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* @type {Property}
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*/
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positions : createPropertyDescriptor('positions'),
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/**
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* Gets or sets the numeric Property specifying the width in pixels.
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* @memberof PolylineGraphics.prototype
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* @type {Property}
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* @default 1.0
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*/
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width : createPropertyDescriptor('width'),
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/**
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* Gets or sets the boolean Property specifying whether the line segments
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* should be great arcs or linearly connected.
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* @memberof PolylineGraphics.prototype
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* @type {Property}
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* @default true
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*/
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followSurface : createPropertyDescriptor('followSurface'),
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/**
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* Gets or sets the boolean Property specifying whether the polyline
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* should be clamped to the ground.
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* @memberof PolylineGraphics.prototype
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* @type {Property}
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* @default false
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*/
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clampToGround : createPropertyDescriptor('clampToGround'),
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/**
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* Gets or sets the numeric Property specifying the angular distance between each latitude and longitude if followSurface is true and clampToGround is false.
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* @memberof PolylineGraphics.prototype
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* @type {Property}
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* @default Cesium.Math.RADIANS_PER_DEGREE
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*/
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granularity : createPropertyDescriptor('granularity'),
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/**
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* Get or sets the enum Property specifying whether the polyline
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* casts or receives shadows from each light source.
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* @memberof PolylineGraphics.prototype
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* @type {Property}
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* @default ShadowMode.DISABLED
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*/
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shadows : createPropertyDescriptor('shadows'),
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/**
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* Gets or sets the {@link DistanceDisplayCondition} Property specifying at what distance from the camera that this polyline will be displayed.
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* @memberof PolylineGraphics.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 zIndex Property specifying the ordering of the polyline. Only has an effect if `clampToGround` is true and polylines on terrain is supported.
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* @memberof RectangleGraphics.prototype
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* @type {ConstantProperty}
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* @default 0
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*/
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zIndex : createPropertyDescriptor('zIndex')
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});
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/**
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* Duplicates this instance.
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*
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* @param {PolylineGraphics} [result] The object onto which to store the result.
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* @returns {PolylineGraphics} The modified result parameter or a new instance if one was not provided.
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*/
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PolylineGraphics.prototype.clone = function(result) {
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if (!defined(result)) {
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return new PolylineGraphics(this);
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}
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result.show = this.show;
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result.material = this.material;
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result.depthFailMaterial = this.depthFailMaterial;
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result.positions = this.positions;
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result.width = this.width;
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result.followSurface = this.followSurface;
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result.clampToGround = this.clampToGround;
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result.granularity = this.granularity;
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result.shadows = this.shadows;
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result.distanceDisplayCondition = this.distanceDisplayCondition;
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result.zIndex = this.zIndex;
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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 {PolylineGraphics} source The object to be merged into this object.
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*/
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PolylineGraphics.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.material = defaultValue(this.material, source.material);
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this.depthFailMaterial = defaultValue(this.depthFailMaterial, source.depthFailMaterial);
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this.positions = defaultValue(this.positions, source.positions);
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this.width = defaultValue(this.width, source.width);
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this.followSurface = defaultValue(this.followSurface, source.followSurface);
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this.clampToGround = defaultValue(this.clampToGround, source.clampToGround);
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this.granularity = defaultValue(this.granularity, source.granularity);
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this.shadows = defaultValue(this.shadows, source.shadows);
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this.distanceDisplayCondition = defaultValue(this.distanceDisplayCondition, source.distanceDisplayCondition);
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this.zIndex = defaultValue(this.zIndex, source.zIndex);
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};
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return PolylineGraphics;
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});
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