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922 lines
29 KiB
JavaScript
922 lines
29 KiB
JavaScript
import ApproximateTerrainHeights from "../Core/ApproximateTerrainHeights.js";
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import ComponentDatatype from "../Core/ComponentDatatype.js";
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import defaultValue from "../Core/defaultValue.js";
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import defined from "../Core/defined.js";
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import destroyObject from "../Core/destroyObject.js";
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import DeveloperError from "../Core/DeveloperError.js";
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import GeometryInstance from "../Core/GeometryInstance.js";
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import GeometryInstanceAttribute from "../Core/GeometryInstanceAttribute.js";
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import GroundPolylineGeometry from "../Core/GroundPolylineGeometry.js";
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import DrawCommand from "../Renderer/DrawCommand.js";
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import Pass from "../Renderer/Pass.js";
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import RenderState from "../Renderer/RenderState.js";
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import ShaderProgram from "../Renderer/ShaderProgram.js";
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import ShaderSource from "../Renderer/ShaderSource.js";
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import PolylineShadowVolumeFS from "../Shaders/PolylineShadowVolumeFS.js";
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import PolylineShadowVolumeMorphFS from "../Shaders/PolylineShadowVolumeMorphFS.js";
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import PolylineShadowVolumeMorphVS from "../Shaders/PolylineShadowVolumeMorphVS.js";
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import PolylineShadowVolumeVS from "../Shaders/PolylineShadowVolumeVS.js";
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import when from "../ThirdParty/when.js";
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import BlendingState from "./BlendingState.js";
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import ClassificationType from "./ClassificationType.js";
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import CullFace from "./CullFace.js";
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import PolylineColorAppearance from "./PolylineColorAppearance.js";
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import PolylineMaterialAppearance from "./PolylineMaterialAppearance.js";
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import Primitive from "./Primitive.js";
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import SceneMode from "./SceneMode.js";
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import StencilConstants from "./StencilConstants.js";
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import StencilFunction from "./StencilFunction.js";
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import StencilOperation from "./StencilOperation.js";
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/**
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* A GroundPolylinePrimitive represents a polyline draped over the terrain or 3D Tiles in the {@link Scene}.
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* <p>
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* Only to be used with GeometryInstances containing {@link GroundPolylineGeometry}.
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* </p>
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*
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* @alias GroundPolylinePrimitive
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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 {Array|GeometryInstance} [options.geometryInstances] GeometryInstances containing GroundPolylineGeometry
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* @param {Appearance} [options.appearance] The Appearance used to render the polyline. Defaults to a white color {@link Material} on a {@link PolylineMaterialAppearance}.
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* @param {Boolean} [options.show=true] Determines if this primitive will be shown.
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* @param {Boolean} [options.interleave=false] When <code>true</code>, geometry vertex attributes are interleaved, which can slightly improve rendering performance but increases load time.
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* @param {Boolean} [options.releaseGeometryInstances=true] When <code>true</code>, the primitive does not keep a reference to the input <code>geometryInstances</code> to save memory.
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* @param {Boolean} [options.allowPicking=true] When <code>true</code>, each geometry instance will only be pickable with {@link Scene#pick}. When <code>false</code>, GPU memory is saved.
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* @param {Boolean} [options.asynchronous=true] Determines if the primitive will be created asynchronously or block until ready. If false initializeTerrainHeights() must be called first.
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* @param {ClassificationType} [options.classificationType=ClassificationType.BOTH] Determines whether terrain, 3D Tiles or both will be classified.
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* @param {Boolean} [options.debugShowBoundingVolume=false] For debugging only. Determines if this primitive's commands' bounding spheres are shown.
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* @param {Boolean} [options.debugShowShadowVolume=false] For debugging only. Determines if the shadow volume for each geometry in the primitive is drawn. Must be <code>true</code> on creation to have effect.
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*
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* @example
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* // 1. Draw a polyline on terrain with a basic color material
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*
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* var instance = new Cesium.GeometryInstance({
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* geometry : new Cesium.GroundPolylineGeometry({
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* positions : Cesium.Cartesian3.fromDegreesArray([
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* -112.1340164450331, 36.05494287836128,
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* -112.08821010582645, 36.097804071380715
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* ]),
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* width : 4.0
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* }),
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* id : 'object returned when this instance is picked and to get/set per-instance attributes'
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* });
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*
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* scene.groundPrimitives.add(new Cesium.GroundPolylinePrimitive({
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* geometryInstances : instance,
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* appearance : new Cesium.PolylineMaterialAppearance()
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* }));
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*
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* // 2. Draw a looped polyline on terrain with per-instance color and a distance display condition.
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* // Distance display conditions for polylines on terrain are based on an approximate terrain height
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* // instead of true terrain height.
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*
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* var instance = new Cesium.GeometryInstance({
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* geometry : new Cesium.GroundPolylineGeometry({
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* positions : Cesium.Cartesian3.fromDegreesArray([
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* -112.1340164450331, 36.05494287836128,
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* -112.08821010582645, 36.097804071380715,
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* -112.13296079730024, 36.168769146801104
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* ]),
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* loop : true,
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* width : 4.0
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* }),
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* attributes : {
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* color : Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.fromCssColorString('green').withAlpha(0.7)),
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* distanceDisplayCondition : new Cesium.DistanceDisplayConditionGeometryInstanceAttribute(1000, 30000)
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* },
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* id : 'object returned when this instance is picked and to get/set per-instance attributes'
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* });
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*
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* scene.groundPrimitives.add(new Cesium.GroundPolylinePrimitive({
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* geometryInstances : instance,
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* appearance : new Cesium.PolylineColorAppearance()
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* }));
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*/
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function GroundPolylinePrimitive(options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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/**
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* The geometry instances rendered with this primitive. This may
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* be <code>undefined</code> if <code>options.releaseGeometryInstances</code>
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* is <code>true</code> when the primitive is constructed.
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* <p>
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* Changing this property after the primitive is rendered has no effect.
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* </p>
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*
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* @readonly
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* @type {Array|GeometryInstance}
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*
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* @default undefined
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*/
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this.geometryInstances = options.geometryInstances;
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this._hasPerInstanceColors = true;
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var appearance = options.appearance;
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if (!defined(appearance)) {
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appearance = new PolylineMaterialAppearance();
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}
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/**
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* The {@link Appearance} used to shade this primitive. Each geometry
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* instance is shaded with the same appearance. Some appearances, like
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* {@link PolylineColorAppearance} allow giving each instance unique
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* properties.
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*
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* @type Appearance
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*
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* @default undefined
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*/
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this.appearance = appearance;
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/**
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* Determines if the primitive will be shown. This affects all geometry
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* instances in the primitive.
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*
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* @type {Boolean}
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*
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* @default true
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*/
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this.show = defaultValue(options.show, true);
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/**
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* Determines whether terrain, 3D Tiles or both will be classified.
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*
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* @type {ClassificationType}
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*
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* @default ClassificationType.BOTH
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*/
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this.classificationType = defaultValue(
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options.classificationType,
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ClassificationType.BOTH
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);
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/**
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* This property is for debugging only; it is not for production use nor is it optimized.
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* <p>
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* Draws the bounding sphere for each draw command in the primitive.
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* </p>
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*
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* @type {Boolean}
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*
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* @default false
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*/
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this.debugShowBoundingVolume = defaultValue(
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options.debugShowBoundingVolume,
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false
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);
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// Shadow volume is shown by removing a discard in the shader, so this isn't toggleable.
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this._debugShowShadowVolume = defaultValue(
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options.debugShowShadowVolume,
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false
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);
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this._primitiveOptions = {
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geometryInstances: undefined,
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appearance: undefined,
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vertexCacheOptimize: false,
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interleave: defaultValue(options.interleave, false),
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releaseGeometryInstances: defaultValue(
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options.releaseGeometryInstances,
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true
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),
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allowPicking: defaultValue(options.allowPicking, true),
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asynchronous: defaultValue(options.asynchronous, true),
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compressVertices: false,
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_createShaderProgramFunction: undefined,
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_createCommandsFunction: undefined,
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_updateAndQueueCommandsFunction: undefined,
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};
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// Used when inserting in an OrderedPrimitiveCollection
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this._zIndex = undefined;
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this._ready = false;
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this._readyPromise = when.defer();
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this._primitive = undefined;
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this._sp = undefined;
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this._sp2D = undefined;
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this._spMorph = undefined;
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this._renderState = getRenderState(false);
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this._renderState3DTiles = getRenderState(true);
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this._renderStateMorph = RenderState.fromCache({
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cull: {
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enabled: true,
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face: CullFace.FRONT, // Geometry is "inverted," so cull front when materials on volume instead of on terrain (morph)
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},
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depthTest: {
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enabled: true,
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},
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blending: BlendingState.PRE_MULTIPLIED_ALPHA_BLEND,
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depthMask: false,
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});
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}
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Object.defineProperties(GroundPolylinePrimitive.prototype, {
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/**
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* Determines if geometry vertex attributes are interleaved, which can slightly improve rendering performance.
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*
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* @memberof GroundPolylinePrimitive.prototype
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*
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* @type {Boolean}
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* @readonly
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*
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* @default false
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*/
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interleave: {
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get: function () {
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return this._primitiveOptions.interleave;
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},
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},
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/**
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* When <code>true</code>, the primitive does not keep a reference to the input <code>geometryInstances</code> to save memory.
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*
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* @memberof GroundPolylinePrimitive.prototype
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*
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* @type {Boolean}
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* @readonly
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*
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* @default true
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*/
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releaseGeometryInstances: {
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get: function () {
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return this._primitiveOptions.releaseGeometryInstances;
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},
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},
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/**
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* When <code>true</code>, each geometry instance will only be pickable with {@link Scene#pick}. When <code>false</code>, GPU memory is saved.
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*
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* @memberof GroundPolylinePrimitive.prototype
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*
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* @type {Boolean}
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* @readonly
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*
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* @default true
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*/
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allowPicking: {
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get: function () {
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return this._primitiveOptions.allowPicking;
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},
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},
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/**
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* Determines if the geometry instances will be created and batched on a web worker.
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*
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* @memberof GroundPolylinePrimitive.prototype
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*
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* @type {Boolean}
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* @readonly
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*
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* @default true
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*/
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asynchronous: {
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get: function () {
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return this._primitiveOptions.asynchronous;
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},
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},
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/**
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* Determines if the primitive is complete and ready to render. If this property is
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* true, the primitive will be rendered the next time that {@link GroundPolylinePrimitive#update}
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* is called.
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*
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* @memberof GroundPolylinePrimitive.prototype
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*
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* @type {Boolean}
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* @readonly
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*/
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ready: {
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get: function () {
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return this._ready;
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},
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},
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/**
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* Gets a promise that resolves when the primitive is ready to render.
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* @memberof GroundPolylinePrimitive.prototype
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* @type {Promise.<GroundPolylinePrimitive>}
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* @readonly
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*/
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readyPromise: {
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get: function () {
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return this._readyPromise.promise;
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},
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},
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/**
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* This property is for debugging only; it is not for production use nor is it optimized.
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* <p>
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* If true, draws the shadow volume for each geometry in the primitive.
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* </p>
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*
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* @memberof GroundPolylinePrimitive.prototype
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*
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* @type {Boolean}
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* @readonly
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*
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* @default false
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*/
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debugShowShadowVolume: {
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get: function () {
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return this._debugShowShadowVolume;
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},
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},
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});
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/**
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* Initializes the minimum and maximum terrain heights. This only needs to be called if you are creating the
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* GroundPolylinePrimitive synchronously.
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*
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* @returns {Promise<void>} A promise that will resolve once the terrain heights have been loaded.
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*/
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GroundPolylinePrimitive.initializeTerrainHeights = function () {
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return ApproximateTerrainHeights.initialize();
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};
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function createShaderProgram(groundPolylinePrimitive, frameState, appearance) {
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var context = frameState.context;
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var primitive = groundPolylinePrimitive._primitive;
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var attributeLocations = primitive._attributeLocations;
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var vs = primitive._batchTable.getVertexShaderCallback()(
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PolylineShadowVolumeVS
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);
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vs = Primitive._appendShowToShader(primitive, vs);
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vs = Primitive._appendDistanceDisplayConditionToShader(primitive, vs);
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vs = Primitive._modifyShaderPosition(
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groundPolylinePrimitive,
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vs,
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frameState.scene3DOnly
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);
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var vsMorph = primitive._batchTable.getVertexShaderCallback()(
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PolylineShadowVolumeMorphVS
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);
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vsMorph = Primitive._appendShowToShader(primitive, vsMorph);
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vsMorph = Primitive._appendDistanceDisplayConditionToShader(
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primitive,
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vsMorph
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);
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vsMorph = Primitive._modifyShaderPosition(
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groundPolylinePrimitive,
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vsMorph,
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frameState.scene3DOnly
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);
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// Access pick color from fragment shader.
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// Helps with varying budget.
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var fs = primitive._batchTable.getVertexShaderCallback()(
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PolylineShadowVolumeFS
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);
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var vsDefines = [
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"GLOBE_MINIMUM_ALTITUDE " +
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frameState.mapProjection.ellipsoid.minimumRadius.toFixed(1),
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];
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var colorDefine = "";
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var materialShaderSource = "";
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if (defined(appearance.material)) {
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materialShaderSource = defined(appearance.material)
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? appearance.material.shaderSource
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: "";
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// Check for use of v_width and v_polylineAngle in material shader
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// to determine whether these varyings should be active in the vertex shader.
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if (
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materialShaderSource.search(/varying\s+float\s+v_polylineAngle;/g) !== -1
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) {
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vsDefines.push("ANGLE_VARYING");
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}
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if (materialShaderSource.search(/varying\s+float\s+v_width;/g) !== -1) {
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vsDefines.push("WIDTH_VARYING");
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}
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} else {
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colorDefine = "PER_INSTANCE_COLOR";
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}
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vsDefines.push(colorDefine);
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var fsDefines = groundPolylinePrimitive.debugShowShadowVolume
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? ["DEBUG_SHOW_VOLUME", colorDefine]
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: [colorDefine];
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|
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var vsColor3D = new ShaderSource({
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defines: vsDefines,
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|
sources: [vs],
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});
|
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var fsColor3D = new ShaderSource({
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defines: fsDefines,
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sources: [materialShaderSource, fs],
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});
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groundPolylinePrimitive._sp = ShaderProgram.replaceCache({
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context: context,
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shaderProgram: primitive._sp,
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vertexShaderSource: vsColor3D,
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fragmentShaderSource: fsColor3D,
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attributeLocations: attributeLocations,
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});
|
|
|
|
// Derive 2D/CV
|
|
var colorProgram2D = context.shaderCache.getDerivedShaderProgram(
|
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groundPolylinePrimitive._sp,
|
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"2dColor"
|
|
);
|
|
if (!defined(colorProgram2D)) {
|
|
var vsColor2D = new ShaderSource({
|
|
defines: vsDefines.concat(["COLUMBUS_VIEW_2D"]),
|
|
sources: [vs],
|
|
});
|
|
colorProgram2D = context.shaderCache.createDerivedShaderProgram(
|
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groundPolylinePrimitive._sp,
|
|
"2dColor",
|
|
{
|
|
context: context,
|
|
shaderProgram: groundPolylinePrimitive._sp2D,
|
|
vertexShaderSource: vsColor2D,
|
|
fragmentShaderSource: fsColor3D,
|
|
attributeLocations: attributeLocations,
|
|
}
|
|
);
|
|
}
|
|
groundPolylinePrimitive._sp2D = colorProgram2D;
|
|
|
|
// Derive Morph
|
|
var colorProgramMorph = context.shaderCache.getDerivedShaderProgram(
|
|
groundPolylinePrimitive._sp,
|
|
"MorphColor"
|
|
);
|
|
if (!defined(colorProgramMorph)) {
|
|
var vsColorMorph = new ShaderSource({
|
|
defines: vsDefines.concat([
|
|
"MAX_TERRAIN_HEIGHT " +
|
|
ApproximateTerrainHeights._defaultMaxTerrainHeight.toFixed(1),
|
|
]),
|
|
sources: [vsMorph],
|
|
});
|
|
|
|
fs = primitive._batchTable.getVertexShaderCallback()(
|
|
PolylineShadowVolumeMorphFS
|
|
);
|
|
var fsColorMorph = new ShaderSource({
|
|
defines: fsDefines,
|
|
sources: [materialShaderSource, fs],
|
|
});
|
|
colorProgramMorph = context.shaderCache.createDerivedShaderProgram(
|
|
groundPolylinePrimitive._sp,
|
|
"MorphColor",
|
|
{
|
|
context: context,
|
|
shaderProgram: groundPolylinePrimitive._spMorph,
|
|
vertexShaderSource: vsColorMorph,
|
|
fragmentShaderSource: fsColorMorph,
|
|
attributeLocations: attributeLocations,
|
|
}
|
|
);
|
|
}
|
|
groundPolylinePrimitive._spMorph = colorProgramMorph;
|
|
}
|
|
|
|
function getRenderState(mask3DTiles) {
|
|
return RenderState.fromCache({
|
|
cull: {
|
|
enabled: true, // prevent double-draw. Geometry is "inverted" (reversed winding order) so we're drawing backfaces.
|
|
},
|
|
blending: BlendingState.PRE_MULTIPLIED_ALPHA_BLEND,
|
|
depthMask: false,
|
|
stencilTest: {
|
|
enabled: mask3DTiles,
|
|
frontFunction: StencilFunction.EQUAL,
|
|
frontOperation: {
|
|
fail: StencilOperation.KEEP,
|
|
zFail: StencilOperation.KEEP,
|
|
zPass: StencilOperation.KEEP,
|
|
},
|
|
backFunction: StencilFunction.EQUAL,
|
|
backOperation: {
|
|
fail: StencilOperation.KEEP,
|
|
zFail: StencilOperation.KEEP,
|
|
zPass: StencilOperation.KEEP,
|
|
},
|
|
reference: StencilConstants.CESIUM_3D_TILE_MASK,
|
|
mask: StencilConstants.CESIUM_3D_TILE_MASK,
|
|
},
|
|
});
|
|
}
|
|
|
|
function createCommands(
|
|
groundPolylinePrimitive,
|
|
appearance,
|
|
material,
|
|
translucent,
|
|
colorCommands,
|
|
pickCommands
|
|
) {
|
|
var primitive = groundPolylinePrimitive._primitive;
|
|
var length = primitive._va.length;
|
|
colorCommands.length = length;
|
|
pickCommands.length = length;
|
|
|
|
var isPolylineColorAppearance = appearance instanceof PolylineColorAppearance;
|
|
|
|
var materialUniforms = isPolylineColorAppearance ? {} : material._uniforms;
|
|
var uniformMap = primitive._batchTable.getUniformMapCallback()(
|
|
materialUniforms
|
|
);
|
|
|
|
for (var i = 0; i < length; i++) {
|
|
var vertexArray = primitive._va[i];
|
|
|
|
var command = colorCommands[i];
|
|
if (!defined(command)) {
|
|
command = colorCommands[i] = new DrawCommand({
|
|
owner: groundPolylinePrimitive,
|
|
primitiveType: primitive._primitiveType,
|
|
});
|
|
}
|
|
|
|
command.vertexArray = vertexArray;
|
|
command.renderState = groundPolylinePrimitive._renderState;
|
|
command.shaderProgram = groundPolylinePrimitive._sp;
|
|
command.uniformMap = uniformMap;
|
|
command.pass = Pass.TERRAIN_CLASSIFICATION;
|
|
command.pickId = "czm_batchTable_pickColor(v_endPlaneNormalEcAndBatchId.w)";
|
|
|
|
var derivedTilesetCommand = DrawCommand.shallowClone(
|
|
command,
|
|
command.derivedCommands.tileset
|
|
);
|
|
derivedTilesetCommand.renderState =
|
|
groundPolylinePrimitive._renderState3DTiles;
|
|
derivedTilesetCommand.pass = Pass.CESIUM_3D_TILE_CLASSIFICATION;
|
|
command.derivedCommands.tileset = derivedTilesetCommand;
|
|
|
|
// derive for 2D
|
|
var derived2DCommand = DrawCommand.shallowClone(
|
|
command,
|
|
command.derivedCommands.color2D
|
|
);
|
|
derived2DCommand.shaderProgram = groundPolylinePrimitive._sp2D;
|
|
command.derivedCommands.color2D = derived2DCommand;
|
|
|
|
var derived2DTilesetCommand = DrawCommand.shallowClone(
|
|
derivedTilesetCommand,
|
|
derivedTilesetCommand.derivedCommands.color2D
|
|
);
|
|
derived2DTilesetCommand.shaderProgram = groundPolylinePrimitive._sp2D;
|
|
derivedTilesetCommand.derivedCommands.color2D = derived2DTilesetCommand;
|
|
|
|
// derive for Morph
|
|
var derivedMorphCommand = DrawCommand.shallowClone(
|
|
command,
|
|
command.derivedCommands.colorMorph
|
|
);
|
|
derivedMorphCommand.renderState = groundPolylinePrimitive._renderStateMorph;
|
|
derivedMorphCommand.shaderProgram = groundPolylinePrimitive._spMorph;
|
|
derivedMorphCommand.pickId = "czm_batchTable_pickColor(v_batchId)";
|
|
command.derivedCommands.colorMorph = derivedMorphCommand;
|
|
}
|
|
}
|
|
|
|
function updateAndQueueCommand(
|
|
groundPolylinePrimitive,
|
|
command,
|
|
frameState,
|
|
modelMatrix,
|
|
cull,
|
|
boundingVolume,
|
|
debugShowBoundingVolume
|
|
) {
|
|
// Use derived appearance command for morph and 2D
|
|
if (frameState.mode === SceneMode.MORPHING) {
|
|
command = command.derivedCommands.colorMorph;
|
|
} else if (frameState.mode !== SceneMode.SCENE3D) {
|
|
command = command.derivedCommands.color2D;
|
|
}
|
|
command.modelMatrix = modelMatrix;
|
|
command.boundingVolume = boundingVolume;
|
|
command.cull = cull;
|
|
command.debugShowBoundingVolume = debugShowBoundingVolume;
|
|
|
|
frameState.commandList.push(command);
|
|
}
|
|
|
|
function updateAndQueueCommands(
|
|
groundPolylinePrimitive,
|
|
frameState,
|
|
colorCommands,
|
|
pickCommands,
|
|
modelMatrix,
|
|
cull,
|
|
debugShowBoundingVolume
|
|
) {
|
|
var primitive = groundPolylinePrimitive._primitive;
|
|
|
|
Primitive._updateBoundingVolumes(primitive, frameState, modelMatrix); // Expected to be identity - GroundPrimitives don't support other model matrices
|
|
|
|
var boundingSpheres;
|
|
if (frameState.mode === SceneMode.SCENE3D) {
|
|
boundingSpheres = primitive._boundingSphereWC;
|
|
} else if (frameState.mode === SceneMode.COLUMBUS_VIEW) {
|
|
boundingSpheres = primitive._boundingSphereCV;
|
|
} else if (
|
|
frameState.mode === SceneMode.SCENE2D &&
|
|
defined(primitive._boundingSphere2D)
|
|
) {
|
|
boundingSpheres = primitive._boundingSphere2D;
|
|
} else if (defined(primitive._boundingSphereMorph)) {
|
|
boundingSpheres = primitive._boundingSphereMorph;
|
|
}
|
|
|
|
var morphing = frameState.mode === SceneMode.MORPHING;
|
|
var classificationType = groundPolylinePrimitive.classificationType;
|
|
var queueTerrainCommands =
|
|
classificationType !== ClassificationType.CESIUM_3D_TILE;
|
|
var queue3DTilesCommands =
|
|
classificationType !== ClassificationType.TERRAIN && !morphing;
|
|
|
|
var command;
|
|
var passes = frameState.passes;
|
|
if (passes.render || (passes.pick && primitive.allowPicking)) {
|
|
var colorLength = colorCommands.length;
|
|
for (var j = 0; j < colorLength; ++j) {
|
|
var boundingVolume = boundingSpheres[j];
|
|
if (queueTerrainCommands) {
|
|
command = colorCommands[j];
|
|
updateAndQueueCommand(
|
|
groundPolylinePrimitive,
|
|
command,
|
|
frameState,
|
|
modelMatrix,
|
|
cull,
|
|
boundingVolume,
|
|
debugShowBoundingVolume
|
|
);
|
|
}
|
|
if (queue3DTilesCommands) {
|
|
command = colorCommands[j].derivedCommands.tileset;
|
|
updateAndQueueCommand(
|
|
groundPolylinePrimitive,
|
|
command,
|
|
frameState,
|
|
modelMatrix,
|
|
cull,
|
|
boundingVolume,
|
|
debugShowBoundingVolume
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called when {@link Viewer} or {@link CesiumWidget} render the scene to
|
|
* get the draw commands needed to render this primitive.
|
|
* <p>
|
|
* Do not call this function directly. This is documented just to
|
|
* list the exceptions that may be propagated when the scene is rendered:
|
|
* </p>
|
|
*
|
|
* @exception {DeveloperError} For synchronous GroundPolylinePrimitives, you must call GroundPolylinePrimitives.initializeTerrainHeights() and wait for the returned promise to resolve.
|
|
* @exception {DeveloperError} All GeometryInstances must have color attributes to use PolylineColorAppearance with GroundPolylinePrimitive.
|
|
*/
|
|
GroundPolylinePrimitive.prototype.update = function (frameState) {
|
|
if (!defined(this._primitive) && !defined(this.geometryInstances)) {
|
|
return;
|
|
}
|
|
|
|
if (!ApproximateTerrainHeights.initialized) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!this.asynchronous) {
|
|
throw new DeveloperError(
|
|
"For synchronous GroundPolylinePrimitives, you must call GroundPolylinePrimitives.initializeTerrainHeights() and wait for the returned promise to resolve."
|
|
);
|
|
}
|
|
//>>includeEnd('debug');
|
|
|
|
GroundPolylinePrimitive.initializeTerrainHeights();
|
|
return;
|
|
}
|
|
|
|
var i;
|
|
|
|
var that = this;
|
|
var primitiveOptions = this._primitiveOptions;
|
|
if (!defined(this._primitive)) {
|
|
var geometryInstances = Array.isArray(this.geometryInstances)
|
|
? this.geometryInstances
|
|
: [this.geometryInstances];
|
|
var geometryInstancesLength = geometryInstances.length;
|
|
var groundInstances = new Array(geometryInstancesLength);
|
|
|
|
var attributes;
|
|
|
|
// Check if each instance has a color attribute.
|
|
for (i = 0; i < geometryInstancesLength; ++i) {
|
|
attributes = geometryInstances[i].attributes;
|
|
if (!defined(attributes) || !defined(attributes.color)) {
|
|
this._hasPerInstanceColors = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < geometryInstancesLength; ++i) {
|
|
var geometryInstance = geometryInstances[i];
|
|
attributes = {};
|
|
var instanceAttributes = geometryInstance.attributes;
|
|
for (var attributeKey in instanceAttributes) {
|
|
if (instanceAttributes.hasOwnProperty(attributeKey)) {
|
|
attributes[attributeKey] = instanceAttributes[attributeKey];
|
|
}
|
|
}
|
|
|
|
// Automatically create line width attribute if not already given
|
|
if (!defined(attributes.width)) {
|
|
attributes.width = new GeometryInstanceAttribute({
|
|
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
|
|
componentsPerAttribute: 1.0,
|
|
value: [geometryInstance.geometry.width],
|
|
});
|
|
}
|
|
|
|
// Update each geometry for framestate.scene3DOnly = true and projection
|
|
geometryInstance.geometry._scene3DOnly = frameState.scene3DOnly;
|
|
GroundPolylineGeometry.setProjectionAndEllipsoid(
|
|
geometryInstance.geometry,
|
|
frameState.mapProjection
|
|
);
|
|
|
|
groundInstances[i] = new GeometryInstance({
|
|
geometry: geometryInstance.geometry,
|
|
attributes: attributes,
|
|
id: geometryInstance.id,
|
|
pickPrimitive: that,
|
|
});
|
|
}
|
|
|
|
primitiveOptions.geometryInstances = groundInstances;
|
|
primitiveOptions.appearance = this.appearance;
|
|
|
|
primitiveOptions._createShaderProgramFunction = function (
|
|
primitive,
|
|
frameState,
|
|
appearance
|
|
) {
|
|
createShaderProgram(that, frameState, appearance);
|
|
};
|
|
primitiveOptions._createCommandsFunction = function (
|
|
primitive,
|
|
appearance,
|
|
material,
|
|
translucent,
|
|
twoPasses,
|
|
colorCommands,
|
|
pickCommands
|
|
) {
|
|
createCommands(
|
|
that,
|
|
appearance,
|
|
material,
|
|
translucent,
|
|
colorCommands,
|
|
pickCommands
|
|
);
|
|
};
|
|
primitiveOptions._updateAndQueueCommandsFunction = function (
|
|
primitive,
|
|
frameState,
|
|
colorCommands,
|
|
pickCommands,
|
|
modelMatrix,
|
|
cull,
|
|
debugShowBoundingVolume,
|
|
twoPasses
|
|
) {
|
|
updateAndQueueCommands(
|
|
that,
|
|
frameState,
|
|
colorCommands,
|
|
pickCommands,
|
|
modelMatrix,
|
|
cull,
|
|
debugShowBoundingVolume
|
|
);
|
|
};
|
|
|
|
this._primitive = new Primitive(primitiveOptions);
|
|
this._primitive.readyPromise.then(function (primitive) {
|
|
that._ready = true;
|
|
|
|
if (that.releaseGeometryInstances) {
|
|
that.geometryInstances = undefined;
|
|
}
|
|
|
|
var error = primitive._error;
|
|
if (!defined(error)) {
|
|
that._readyPromise.resolve(that);
|
|
} else {
|
|
that._readyPromise.reject(error);
|
|
}
|
|
});
|
|
}
|
|
|
|
if (
|
|
this.appearance instanceof PolylineColorAppearance &&
|
|
!this._hasPerInstanceColors
|
|
) {
|
|
throw new DeveloperError(
|
|
"All GeometryInstances must have color attributes to use PolylineColorAppearance with GroundPolylinePrimitive."
|
|
);
|
|
}
|
|
|
|
this._primitive.appearance = this.appearance;
|
|
this._primitive.show = this.show;
|
|
this._primitive.debugShowBoundingVolume = this.debugShowBoundingVolume;
|
|
this._primitive.update(frameState);
|
|
};
|
|
|
|
/**
|
|
* Returns the modifiable per-instance attributes for a {@link GeometryInstance}.
|
|
*
|
|
* @param {*} id The id of the {@link GeometryInstance}.
|
|
* @returns {Object} The typed array in the attribute's format or undefined if the is no instance with id.
|
|
*
|
|
* @exception {DeveloperError} must call update before calling getGeometryInstanceAttributes.
|
|
*
|
|
* @example
|
|
* var attributes = primitive.getGeometryInstanceAttributes('an id');
|
|
* attributes.color = Cesium.ColorGeometryInstanceAttribute.toValue(Cesium.Color.AQUA);
|
|
* attributes.show = Cesium.ShowGeometryInstanceAttribute.toValue(true);
|
|
*/
|
|
GroundPolylinePrimitive.prototype.getGeometryInstanceAttributes = function (
|
|
id
|
|
) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
if (!defined(this._primitive)) {
|
|
throw new DeveloperError(
|
|
"must call update before calling getGeometryInstanceAttributes"
|
|
);
|
|
}
|
|
//>>includeEnd('debug');
|
|
return this._primitive.getGeometryInstanceAttributes(id);
|
|
};
|
|
|
|
/**
|
|
* Checks if the given Scene supports GroundPolylinePrimitives.
|
|
* GroundPolylinePrimitives require support for the WEBGL_depth_texture extension.
|
|
*
|
|
* @param {Scene} scene The current scene.
|
|
* @returns {Boolean} Whether or not the current scene supports GroundPolylinePrimitives.
|
|
*/
|
|
GroundPolylinePrimitive.isSupported = function (scene) {
|
|
return scene.frameState.context.depthTexture;
|
|
};
|
|
|
|
/**
|
|
* Returns true if this object was destroyed; otherwise, false.
|
|
* <p>
|
|
* If this object was destroyed, it should not be used; calling any function other than
|
|
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception.
|
|
* </p>
|
|
*
|
|
* @returns {Boolean} <code>true</code> if this object was destroyed; otherwise, <code>false</code>.
|
|
*
|
|
* @see GroundPolylinePrimitive#destroy
|
|
*/
|
|
GroundPolylinePrimitive.prototype.isDestroyed = function () {
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* Destroys the WebGL resources held by this object. Destroying an object allows for deterministic
|
|
* release of WebGL resources, instead of relying on the garbage collector to destroy this object.
|
|
* <p>
|
|
* Once an object is destroyed, it should not be used; calling any function other than
|
|
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception. Therefore,
|
|
* assign the return value (<code>undefined</code>) to the object as done in the example.
|
|
* </p>
|
|
*
|
|
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
|
|
*
|
|
* @example
|
|
* e = e && e.destroy();
|
|
*
|
|
* @see GroundPolylinePrimitive#isDestroyed
|
|
*/
|
|
GroundPolylinePrimitive.prototype.destroy = function () {
|
|
this._primitive = this._primitive && this._primitive.destroy();
|
|
this._sp = this._sp && this._sp.destroy();
|
|
|
|
// Derived programs, destroyed above if they existed.
|
|
this._sp2D = undefined;
|
|
this._spMorph = undefined;
|
|
|
|
return destroyObject(this);
|
|
};
|
|
export default GroundPolylinePrimitive;
|