Cesium JS API
AppearanceArcGisMapServerImageryProviderArcGISTiledElevationTerrainProviderArcTypeAssociativeArrayAxisAxisAlignedBoundingBoxbarycentricCoordinatesBillboardBillboardCollectionBillboardGraphicsBillboardVisualizerbinarySearchbinarySearchComparatorBingMapsGeocoderServiceBingMapsImageryProviderBingMapsStyleBlendEquationBlendFunctionBlendingStateBlendOptionBoundingRectangleBoundingSphereBoxEmitterBoxGeometryBoxGeometryUpdaterBoxGraphicsBoxOutlineGeometrybuildModuleUrlCallbackPropertyCameraCameraEventAggregatorCameraEventTypeCartesian2Cartesian3Cartesian4CartographicCartographicGeocoderServiceCatmullRomSplineCesium3DTileCesium3DTileColorBlendModeCesium3DTileContentCesium3DTileFeatureCesium3DTilePointFeatureCesium3DTilesetCesium3DTilesetGraphicsCesium3DTilesetVisualizerCesium3DTileStyleCesium3DTilesVoxelProviderCesiumTerrainProviderCesiumWidgetCheckerboardMaterialPropertyCircleEmitterCircleGeometryCircleOutlineGeometryClassificationPrimitiveClassificationTypeClippingPlaneClippingPlaneCollectionClockClockRangeClockStepcloneCloudCollectionCloudTypeColorColorBlendModeColorGeometryInstanceAttributeColorMaterialPropertycombineComponentDatatypeCompositeEntityCollectionCompositeMaterialPropertyCompositePositionPropertyCompositePropertyCompressedTextureBufferConditionsExpressionConeEmitterConstantPositionPropertyConstantPropertyConstantSplineContextOptionsCoplanarPolygonGeometryCoplanarPolygonOutlineGeometryCornerTypeCorridorGeometryCorridorGeometryUpdaterCorridorGraphicsCorridorOutlineGeometrycreateElevationBandMaterialcreateElevationBandMaterialBandcreateElevationBandMaterialEntrycreateGuidcreateOsmBuildingscreateTangentSpaceDebugPrimitivecreateWorldImagerycreateWorldTerrainCreditCreditDisplayCubicRealPolynomialCullFaceCullingVolumeCumulusCloudCustomDataSourceCustomHeightmapTerrainProviderCustomShaderCustomShaderModeCustomShaderTranslucencyModeCylinderGeometryCylinderGeometryUpdaterCylinderGraphicsCylinderOutlineGeometryCzmlDataSourceDataSourceDataSourceClockDataSourceCollectionDataSourceDisplayDebugAppearanceDebugCameraPrimitiveDebugModelMatrixPrimitiveDefaultProxydefaultValuedefinedDepthFunctiondestroyObjectDeveloperErrorDirectionalLightDirectionUpDiscardEmptyTileImagePolicyDiscardMissingTileImagePolicyDistanceDisplayConditionDistanceDisplayConditionGeometryInstanceAttributeEasingFunctionEllipseGeometryEllipseGeometryUpdaterEllipseGraphicsEllipseOutlineGeometryEllipsoidEllipsoidGeodesicEllipsoidGeometryEllipsoidGeometryUpdaterEllipsoidGraphicsEllipsoidOutlineGeometryEllipsoidRhumbLineEllipsoidSurfaceAppearanceEllipsoidTangentPlaneEllipsoidTerrainProviderEntityEntityClusterEntityCollectionEntityViewEventEventHelperexcludesReverseAxisexportKmlexportKmlModelCallbackexportKmlResultKmlexportKmlResultKmzExpressionExtrapolationTypeFeatureDetectionFogformatErrorFrameRateMonitorFrustumGeometryFrustumOutlineGeometryFullscreenGeocoderServiceGeocodeTypeGeographicProjectionGeographicTilingSchemeGeoJsonDataSourceGeometryGeometryAttributeGeometryAttributesGeometryFactoryGeometryInstanceGeometryInstanceAttributeGeometryPipelineGeometryUpdaterGeometryVisualizergetAbsoluteUrigetBaseUrigetExtensionFromUriGetFeatureInfoFormatgetFilenameFromUrigetImagePixelsgetTimestampGlobeGlobeTranslucencyGoogleEarthEnterpriseImageryProviderGoogleEarthEnterpriseMapsProviderGoogleEarthEnterpriseMetadataGoogleEarthEnterpriseTerrainDataGoogleEarthEnterpriseTerrainProviderGpxDataSourceGregorianDateGridImageryProviderGridMaterialPropertyGroundGeometryUpdaterGroundPolylineGeometryGroundPolylinePrimitiveGroundPrimitiveHeadingPitchRangeHeadingPitchRollHeadingPitchRollValuesHeightmapEncodingHeightmapTerrainDataHeightReferenceHermitePolynomialApproximationHermiteSplineHilbertOrderHorizontalOriginI3SDataProviderI3SFeatureI3SFieldI3SGeometryI3SLayerI3SNodeImageBasedLightingImageMaterialPropertyImageryLayerImageryLayerCollectionImageryLayerFeatureInfoImageryProviderImageryTypesincludesReverseAxisIndexDatatypeIntersectIntersections2DIntersectionTestsIntervalIonIonGeocoderServiceIonImageryProviderIonResourceIonWorldImageryStyleisLeapYearIso8601JulianDateKeyboardEventModifierKmlCameraKmlDataSourceKmlFeatureDataKmlLookAtKmlTourKmlTourFlyToKmlTourWaitLabelLabelCollectionLabelGraphicsLabelStyleLabelVisualizerLagrangePolynomialApproximationLeapSecondLightLightingModelLinearApproximationLinearSplineMapboxImageryProviderMapboxStyleImageryProviderMapMode2DMapProjectionMaterialMaterialAppearanceMaterialSupportMaterialPropertyMathMatrix2Matrix3Matrix4mergeSortmergeSortComparatorMetadataClassMetadataClassPropertyMetadataComponentTypeMetadataEnumMetadataEnumValueMetadataSchemaMetadataTypeModelModelAnimationModelAnimationCollectionModelAnimationLoopModelFeatureModelGraphicsModelNodeModelVisualizerMoonMorphWeightSplineNearFarScalarNeverTileDiscardPolicyNodeTransformationPropertyobjectToQueryOccluderOpenCageGeocoderServiceOpenStreetMapImageryProviderOrientedBoundingBoxOrthographicFrustumOrthographicOffCenterFrustumPackableForInterpolationParticleParticleBurstParticleEmitterParticleSystemPathGraphicsPathVisualizerPeliasGeocoderServicePerInstanceColorAppearancePerspectiveFrustumPerspectiveOffCenterFrustumPinBuilderPixelDatatypePixelFormatPlanePlaneGeometryPlaneGeometryUpdaterPlaneGraphicsPlaneOutlineGeometryPointCloudShadingPointGraphicspointInsideTrianglePointPrimitivePointPrimitiveCollectionPointVisualizerPolygonGeometryPolygonGeometryUpdaterPolygonGraphicsPolygonHierarchyPolygonOutlineGeometryPolylinePolylineArrowMaterialPropertyPolylineCollectionPolylineColorAppearancePolylineDashMaterialPropertyPolylineGeometryPolylineGeometryUpdaterPolylineGlowMaterialPropertyPolylineGraphicsPolylineMaterialAppearancePolylineOutlineMaterialPropertyPolylineVisualizerPolylineVolumeGeometryPolylineVolumeGeometryUpdaterPolylineVolumeGraphicsPolylineVolumeOutlineGeometryPositionPropertyPositionPropertyArrayPostProcessStagePostProcessStageCollectionPostProcessStageCompositePostProcessStageLibraryPostProcessStageSampleModePrimitivePrimitiveCollectionPrimitiveTypePropertyPropertyArrayPropertyBagProxyQuadraticRealPolynomialQuantizedMeshTerrainDataQuarticRealPolynomialQuaternionQuaternionSplinequeryToObjectQueueRayreadyPromiseRectangleRectangleGeometryRectangleGeometryUpdaterRectangleGraphicsRectangleOutlineGeometryReferenceFrameReferencePropertyremoveExtensionRequestRequestErrorEventRequestSchedulerRequestStateRequestTypeResourceRuntimeErrorSampledPositionPropertySampledPropertysampleTerrainsampleTerrainMostDetailedSceneSceneModeSceneTransformsScreenSpaceCameraControllerScreenSpaceEventHandlerScreenSpaceEventTypeshaderDefinesshaderMaximumIntersectionsLengthshaderUniformsShadowMapShadowModeShowGeometryInstanceAttributeSimon1994PlanetaryPositionsSimplePolylineGeometrySingleTileImageryProviderSkyAtmosphereSkyBoxSphereEmitterSphereGeometrySphereOutlineGeometrySphericalSplineSplitDirectionStencilFunctionStencilOperationSteppedSplineStripeMaterialPropertyStripeOrientationStyleExpressionsubdivideArraySunSunLightTaskProcessorTerrainDataTerrainProviderTextureMagnificationFilterTextureMinificationFilterTextureUniformTileAvailabilityTileCoordinatesImageryProviderTileDiscardPolicyTileMapServiceImageryProviderTileProviderErrorTilingSchemeTimeDynamicImageryTimeDynamicPointCloudTimeIntervalTimeIntervalCollectionTimeIntervalCollectionPositionPropertyTimeIntervalCollectionPropertyTimeStandardTransformsTranslationRotationScaleTridiagonalSystemSolverTrustedServersUniformSpecifierUniformTypeUrlTemplateImageryProviderVaryingTypeVelocityOrientationPropertyVelocityVectorPropertyVertexFormatVerticalOriginVideoSynchronizerViewportQuadVisibilityVisualizerVoxelPrimitiveVoxelProviderVoxelShapeTypeVRTheWorldTerrainProviderWallGeometryWallGeometryUpdaterWallGraphicsWallOutlineGeometryWebGLConstantsWebGLOptionsWebMapServiceImageryProviderWebMapTileServiceImageryProviderWebMercatorProjectionWebMercatorTilingSchemeWindingOrderwriteTextToCanvasAnimationAnimationViewModelBaseLayerPickerBaseLayerPickerViewModelCesium3DTilesInspectorCesium3DTilesInspectorViewModelCesiumInspectorCesiumInspectorViewModelClockViewModelCommandcreateCommandFullscreenButtonFullscreenButtonViewModelGeocoderGeocoderViewModelHomeButtonHomeButtonViewModelInfoBoxInfoBoxViewModelNavigationHelpButtonNavigationHelpButtonViewModelPerformanceWatchdogPerformanceWatchdogViewModelProjectionPickerProjectionPickerViewModelProviderViewModelSceneModePickerSceneModePickerViewModelSelectionIndicatorSelectionIndicatorViewModelSvgPathBindingHandlerTimelineToggleButtonViewModelViewerviewerCesium3DTilesInspectorMixinviewerCesiumInspectorMixinviewerDragDropMixinviewerPerformanceWatchdogMixinviewerVoxelInspectorMixinVoxelInspectorVoxelInspectorViewModelVRButtonVRButtonViewModel

binarySearch

binarySearch是Cesium中的一个函数,它用于在有序数组中查找指定元素的索引。该函数采用二分查找算法,在数组中快速定位目标元素。

语法

Cesium.binarySearch(array, itemToFind, comparator, [start=0], [end=array.length]);

参数

  • array:要搜索的有序数组。
  • itemToFind:要查找的元素。
  • comparator:一个可选的比较函数,用于在数组中比较元素顺序。
  • start:可选的搜索起始索引,默认值为0。
  • end:可选的搜索终止索引,默认值为数组的长度。

返回值

如果找到了目标元素,则返回该元素在数组中的索引;否则返回一个负数,表示目标元素在数组中的插入位置。

示例

在以下示例中,我们将对有序数组进行二分查找。

// 定义有序数组
var arr = [1, 3, 5, 7, 9];

// 查找目标元素3
var index = Cesium.binarySearch(arr, 3);

// 输出结果
console.log(index); // 1

// 查找不存在的目标元素2
var index = Cesium.binarySearch(arr, 2);

// 输出结果
console.log(index); // -2

在上述示例中,我们使用binarySearch函数分别查找了数组中的元素3和2。当在数组中找到元素时,函数返回该元素的索引;如果未找到元素,则返回该元素在数组中的插入位置的负数值。

注意事项

  • 该函数只能用于有序数组的查找,否则可能得到错误的结果。
  • 在使用该函数时,必须保证数组中的元素已经按照升序排列,否则可能得到错误的结果。
  • 如果没有提供比较函数,则函数将使用默认的比较函数进行比较。默认情况下,binarySearch函数将使用JavaScript的<>运算符进行比较。如果要使用自定义的比较函数,则必须保证该函数能够正确判断元素之间的顺序。