Cesium JS API
AppearanceArcGisMapServerImageryProviderArcGISTiledElevationTerrainProviderArcTypeAssociativeArrayAxisAxisAlignedBoundingBoxbarycentricCoordinatesBillboardBillboardCollectionBillboardGraphicsBillboardVisualizerbinarySearchbinarySearchComparatorBingMapsGeocoderServiceBingMapsImageryProviderBingMapsStyleBlendEquationBlendFunctionBlendingStateBlendOptionBoundingRectangleBoundingSphereBoxEmitterBoxGeometryBoxGeometryUpdaterBoxGraphicsBoxOutlineGeometrybuildModuleUrlCallbackPropertyCameraCameraEventAggregatorCameraEventTypeCartesian2Cartesian3Cartesian4CartographicCartographicGeocoderServiceCatmullRomSplineCesium3DTileCesium3DTileColorBlendModeCesium3DTileContentCesium3DTileFeatureCesium3DTilePointFeatureCesium3DTilesetCesium3DTilesetGraphicsCesium3DTilesetVisualizerCesium3DTileStyleCesium3DTilesVoxelProviderCesiumTerrainProviderCesiumWidgetCheckerboardMaterialPropertyCircleEmitterCircleGeometryCircleOutlineGeometryClassificationPrimitiveClassificationTypeClippingPlaneClippingPlaneCollectionClockClockRangeClockStepcloneCloudCollectionCloudTypeColorColorBlendModeColorGeometryInstanceAttributeColorMaterialPropertycombineComponentDatatypeCompositeEntityCollectionCompositeMaterialPropertyCompositePositionPropertyCompositePropertyCompressedTextureBufferConditionsExpressionConeEmitterConstantPositionPropertyConstantPropertyConstantSplineContextOptionsCoplanarPolygonGeometryCoplanarPolygonOutlineGeometryCornerTypeCorridorGeometryCorridorGeometryUpdaterCorridorGraphicsCorridorOutlineGeometrycreateElevationBandMaterialcreateElevationBandMaterialBandcreateElevationBandMaterialEntrycreateGuidcreateOsmBuildingscreateTangentSpaceDebugPrimitivecreateWorldImagerycreateWorldTerrainCreditCreditDisplayCubicRealPolynomialCullFaceCullingVolumeCumulusCloudCustomDataSourceCustomHeightmapTerrainProviderCustomShaderCustomShaderModeCustomShaderTranslucencyModeCylinderGeometryCylinderGeometryUpdaterCylinderGraphicsCylinderOutlineGeometryCzmlDataSourceDataSourceDataSourceClockDataSourceCollectionDataSourceDisplayDebugAppearanceDebugCameraPrimitiveDebugModelMatrixPrimitiveDefaultProxydefaultValuedefinedDepthFunctiondestroyObjectDeveloperErrorDirectionalLightDirectionUpDiscardEmptyTileImagePolicyDiscardMissingTileImagePolicyDistanceDisplayConditionDistanceDisplayConditionGeometryInstanceAttributeEasingFunctionEllipseGeometryEllipseGeometryUpdaterEllipseGraphicsEllipseOutlineGeometryEllipsoidEllipsoidGeodesicEllipsoidGeometryEllipsoidGeometryUpdaterEllipsoidGraphicsEllipsoidOutlineGeometryEllipsoidRhumbLineEllipsoidSurfaceAppearanceEllipsoidTangentPlaneEllipsoidTerrainProviderEntityEntityClusterEntityCollectionEntityViewEventEventHelperexcludesReverseAxisexportKmlexportKmlModelCallbackexportKmlResultKmlexportKmlResultKmzExpressionExtrapolationTypeFeatureDetectionFogformatErrorFrameRateMonitorFrustumGeometryFrustumOutlineGeometryFullscreenGeocoderServiceGeocodeTypeGeographicProjectionGeographicTilingSchemeGeoJsonDataSourceGeometryGeometryAttributeGeometryAttributesGeometryFactoryGeometryInstanceGeometryInstanceAttributeGeometryPipelineGeometryUpdaterGeometryVisualizergetAbsoluteUrigetBaseUrigetExtensionFromUriGetFeatureInfoFormatgetFilenameFromUrigetImagePixelsgetTimestampGlobeGlobeTranslucencyGoogleEarthEnterpriseImageryProviderGoogleEarthEnterpriseMapsProviderGoogleEarthEnterpriseMetadataGoogleEarthEnterpriseTerrainDataGoogleEarthEnterpriseTerrainProviderGpxDataSourceGregorianDateGridImageryProviderGridMaterialPropertyGroundGeometryUpdaterGroundPolylineGeometryGroundPolylinePrimitiveGroundPrimitiveHeadingPitchRangeHeadingPitchRollHeadingPitchRollValuesHeightmapEncodingHeightmapTerrainDataHeightReferenceHermitePolynomialApproximationHermiteSplineHilbertOrderHorizontalOriginI3SDataProviderI3SFeatureI3SFieldI3SGeometryI3SLayerI3SNodeImageBasedLightingImageMaterialPropertyImageryLayerImageryLayerCollectionImageryLayerFeatureInfoImageryProviderImageryTypesincludesReverseAxisIndexDatatypeIntersectIntersections2DIntersectionTestsIntervalIonIonGeocoderServiceIonImageryProviderIonResourceIonWorldImageryStyleisLeapYearIso8601JulianDateKeyboardEventModifierKmlCameraKmlDataSourceKmlFeatureDataKmlLookAtKmlTourKmlTourFlyToKmlTourWaitLabelLabelCollectionLabelGraphicsLabelStyleLabelVisualizerLagrangePolynomialApproximationLeapSecondLightLightingModelLinearApproximationLinearSplineMapboxImageryProviderMapboxStyleImageryProviderMapMode2DMapProjectionMaterialMaterialAppearanceMaterialSupportMaterialPropertyMathMatrix2Matrix3Matrix4mergeSortmergeSortComparatorMetadataClassMetadataClassPropertyMetadataComponentTypeMetadataEnumMetadataEnumValueMetadataSchemaMetadataTypeModelModelAnimationModelAnimationCollectionModelAnimationLoopModelFeatureModelGraphicsModelNodeModelVisualizerMoonMorphWeightSplineNearFarScalarNeverTileDiscardPolicyNodeTransformationPropertyobjectToQueryOccluderOpenCageGeocoderServiceOpenStreetMapImageryProviderOrientedBoundingBoxOrthographicFrustumOrthographicOffCenterFrustumPackableForInterpolationParticleParticleBurstParticleEmitterParticleSystemPathGraphicsPathVisualizerPeliasGeocoderServicePerInstanceColorAppearancePerspectiveFrustumPerspectiveOffCenterFrustumPinBuilderPixelDatatypePixelFormatPlanePlaneGeometryPlaneGeometryUpdaterPlaneGraphicsPlaneOutlineGeometryPointCloudShadingPointGraphicspointInsideTrianglePointPrimitivePointPrimitiveCollectionPointVisualizerPolygonGeometryPolygonGeometryUpdaterPolygonGraphicsPolygonHierarchyPolygonOutlineGeometryPolylinePolylineArrowMaterialPropertyPolylineCollectionPolylineColorAppearancePolylineDashMaterialPropertyPolylineGeometryPolylineGeometryUpdaterPolylineGlowMaterialPropertyPolylineGraphicsPolylineMaterialAppearancePolylineOutlineMaterialPropertyPolylineVisualizerPolylineVolumeGeometryPolylineVolumeGeometryUpdaterPolylineVolumeGraphicsPolylineVolumeOutlineGeometryPositionPropertyPositionPropertyArrayPostProcessStagePostProcessStageCollectionPostProcessStageCompositePostProcessStageLibraryPostProcessStageSampleModePrimitivePrimitiveCollectionPrimitiveTypePropertyPropertyArrayPropertyBagProxyQuadraticRealPolynomialQuantizedMeshTerrainDataQuarticRealPolynomialQuaternionQuaternionSplinequeryToObjectQueueRayreadyPromiseRectangleRectangleGeometryRectangleGeometryUpdaterRectangleGraphicsRectangleOutlineGeometryReferenceFrameReferencePropertyremoveExtensionRequestRequestErrorEventRequestSchedulerRequestStateRequestTypeResourceRuntimeErrorSampledPositionPropertySampledPropertysampleTerrainsampleTerrainMostDetailedSceneSceneModeSceneTransformsScreenSpaceCameraControllerScreenSpaceEventHandlerScreenSpaceEventTypeshaderDefinesshaderMaximumIntersectionsLengthshaderUniformsShadowMapShadowModeShowGeometryInstanceAttributeSimon1994PlanetaryPositionsSimplePolylineGeometrySingleTileImageryProviderSkyAtmosphereSkyBoxSphereEmitterSphereGeometrySphereOutlineGeometrySphericalSplineSplitDirectionStencilFunctionStencilOperationSteppedSplineStripeMaterialPropertyStripeOrientationStyleExpressionsubdivideArraySunSunLightTaskProcessorTerrainDataTerrainProviderTextureMagnificationFilterTextureMinificationFilterTextureUniformTileAvailabilityTileCoordinatesImageryProviderTileDiscardPolicyTileMapServiceImageryProviderTileProviderErrorTilingSchemeTimeDynamicImageryTimeDynamicPointCloudTimeIntervalTimeIntervalCollectionTimeIntervalCollectionPositionPropertyTimeIntervalCollectionPropertyTimeStandardTransformsTranslationRotationScaleTridiagonalSystemSolverTrustedServersUniformSpecifierUniformTypeUrlTemplateImageryProviderVaryingTypeVelocityOrientationPropertyVelocityVectorPropertyVertexFormatVerticalOriginVideoSynchronizerViewportQuadVisibilityVisualizerVoxelPrimitiveVoxelProviderVoxelShapeTypeVRTheWorldTerrainProviderWallGeometryWallGeometryUpdaterWallGraphicsWallOutlineGeometryWebGLConstantsWebGLOptionsWebMapServiceImageryProviderWebMapTileServiceImageryProviderWebMercatorProjectionWebMercatorTilingSchemeWindingOrderwriteTextToCanvasAnimationAnimationViewModelBaseLayerPickerBaseLayerPickerViewModelCesium3DTilesInspectorCesium3DTilesInspectorViewModelCesiumInspectorCesiumInspectorViewModelClockViewModelCommandcreateCommandFullscreenButtonFullscreenButtonViewModelGeocoderGeocoderViewModelHomeButtonHomeButtonViewModelInfoBoxInfoBoxViewModelNavigationHelpButtonNavigationHelpButtonViewModelPerformanceWatchdogPerformanceWatchdogViewModelProjectionPickerProjectionPickerViewModelProviderViewModelSceneModePickerSceneModePickerViewModelSelectionIndicatorSelectionIndicatorViewModelSvgPathBindingHandlerTimelineToggleButtonViewModelViewerviewerCesium3DTilesInspectorMixinviewerCesiumInspectorMixinviewerDragDropMixinviewerPerformanceWatchdogMixinviewerVoxelInspectorMixinVoxelInspectorVoxelInspectorViewModelVRButtonVRButtonViewModel

PolylineVolumeGeometryUpdater

PolylineVolumeGeometryUpdater是CesiumJS中的一个实体更新程序,用于根据数据源中的属性来更新每个折线段的几何形状。该程序可以用于创建拥有多个体积的管状物体。该文档将详细介绍PolylineVolumeGeometryUpdater的使用方法和属性。

创建一个PolylineVolumeGeometryUpdater

var polyline = new Cesium.Entity({
   polylineVolume : {
      positions : [...],
      shape : [...],
      cornerType : Cesium.CornerType.BEVELED,
      material : Cesium.Color.BLUE
   }
});

viewer.entities.add(polyline); 

var polylineVolumeUpdater = new Cesium.PolylineVolumeGeometryUpdater(polyline);

PolylineVolumeGeometryUpdater的属性

PolylineVolumeGeometryUpdater构造函数接收一个Entity对象并将其作为参数创建实体更新程序。

entity

类型:Entity

接收到的实体对象。该对象必须包含polylineVolume属性,如果缺乏必要属性,程序将无法工作。

polylineVolume

类型:Object

该实体对象的polylineVolume属性。包含四个属性:

  • positions:Cartesian3[]类型,表示折线段的顶点位置数组。
  • shape:Cartesian2[]类型,表示折线段的断面形状。
  • cornerType:CornerType类型,表示断面之间的角落类型。
  • material:材质,表示管状体的外观。

isClosed

类型:Boolean

表示折线段是否为闭合形状。如果折线是一个环形路径,则为true,否则为false。

PolylineVolumeGeometryUpdater的方法

setProperty(propertyName, value)

类型:Function

用于更改实体的属性,例如更改线段的位置或形状。

参数:

  • propertyName:String类型,表示要更改的实体属性名。
  • value:任意类型,表示要设置的属性值。

例子:

polyline.polylineVolume.positions = [
    Cesium.Cartesian3.fromDegrees(-75.10, 38.90),
    Cesium.Cartesian3.fromDegrees(-77.0, 38.90)
];
polylineVolumeUpdater.setProperty('polylineVolume', polyline.polylineVolume);

isUpdating()

类型:Function

返回此实体更新程序是否正在更新此实体。

destroy()

类型:Function

用于从内存中删除实体更新程序,释放内存。

PolylineVolumeGeometryUpdater的事件

changedEvent

类型:Event

在实体更新程序检测到实体已更改时触发。可以添加事件处理程序来在修改实体时执行其他操作。

结论

PolylineVolumeGeometryUpdater是一个有用的实体更新程序,可以帮助用户创建多个体积的管状体。该文档介绍了PolylineVolumeGeometryUpdater的构造函数、属性、方法和事件。熟练掌握这些属性和方法可以更好地理解和利用CesiumJS中的实体更新程序。