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CesiumJS Skills Domain Mapping

Version baseline: CesiumJS v1.143 (2026-07-01) Last updated: 2026-07-15 Total public symbols assigned: ~551

This document is the definitive source of truth for the CesiumJS skill decomposition. Every public class, function, and enum in CesiumJS is assigned to exactly one domain. Other domains may cross-reference a symbol, but only one domain owns it.

Domain Summary

# Skill Name Entries Description (passive activation)
1 cesiumjs-viewer-setup ~70 CesiumJS viewer setup - Viewer, CesiumWidget, widgets, Ion token, Scene configuration, SceneMode, factory helpers, geocoders, platform services. Use when initializing a CesiumJS application, configuring viewer widgets, setting Ion access tokens, creating default terrain or imagery, or bootstrapping a 3D globe.
2 cesiumjs-camera ~10 CesiumJS camera control - Camera, flyTo, lookAt, setView, ScreenSpaceCameraController, CameraEventAggregator, flight animation. Use when positioning the camera, creating flyTo animations, constraining user navigation, tracking entities, or converting between screen and world coordinates.
3 cesiumjs-entities ~61 CesiumJS entities and data sources - Entity, EntityCollection, DataSource, GeoJsonDataSource, KmlDataSource, CzmlDataSource, Graphics types, PathMode, Visualizers. Use when adding points, labels, models, polygons, polylines, or time-segmented paths to the map, loading GeoJSON/KML/CZML/GPX data, or working with the high-level Entity API.
4 cesiumjs-3d-tiles ~48 CesiumJS 3D Tiles - Cesium3DTileset, MVTDataProvider, styling, metadata, feature picking, voxels, point clouds, I3S, Gaussian splats, clipping planes and polygons. Use when loading 3D Tiles tilesets or Mapbox Vector Tiles as runtime 3D Tiles, styling building/vector features, querying metadata properties, working with voxels or point clouds, or clipping spatial data.
5 cesiumjs-imagery ~30 CesiumJS imagery layers - ImageryProvider, ImageryLayer, ImageryLayerCollection, WMS, WMTS, Bing, OpenStreetMap, ArcGIS, Mapbox, tile discard policies. Use when adding or swapping base map layers, configuring imagery providers, layering multiple map sources, or creating split-screen imagery comparisons.
6 cesiumjs-terrain-environment ~35 CesiumJS terrain, globe, and environment - TerrainProvider, Globe, sampleTerrain, atmosphere, sky, fog, lighting, shadows, panoramas. Use when configuring terrain providers, querying terrain heights, customizing atmosphere or sky rendering, adding panoramas, or adjusting scene lighting and shadows.
7 cesiumjs-primitives ~82 CesiumJS primitives and geometry - Primitive, GeometryInstance, Appearance, BufferPrimitive collections, GeoJsonPrimitive, Billboard/Label/PointPrimitive collections, built-in geometry shapes, ground primitives, classification. Use when rendering performance-critical static/vector geometry, loading GeoJSON without entities, creating custom shapes, batching draw calls, or using low-level collections.
8 cesiumjs-materials-shaders ~20 CesiumJS materials and post-processing — Material, Fabric JSON, MaterialAppearance, ImageBasedLighting, PostProcessStage, PostProcessStageLibrary, bloom, depth of field, ambient occlusion, FXAA, tonemapping, BlendingState. Use when defining Fabric materials for entities or primitives, configuring PBR image-based lighting, or adding screen-space post-processing effects.
14 cesiumjs-custom-shader ~7 CustomShader authoring — vertexShaderText and fragmentShaderText against VertexInput, FragmentInput, FeatureIds, Metadata, czm_modelMaterial. Use when reading EXT_mesh_features or EXT_structural_metadata property textures/tables, vertex displacement, or shading VoxelPrimitive.
9 cesiumjs-time-properties ~57 CesiumJS time, properties, and animation - Clock, JulianDate, TimeInterval, Property, SampledProperty, CallbackProperty, interpolation, splines, CZML temporal data. Use when making entity attributes time-dynamic, configuring the simulation clock, interpolating positions over time, or working with sampled or callback properties.
10 cesiumjs-spatial-math ~55 CesiumJS spatial math - Cartesian3, Cartographic, Matrix4, Quaternion, Transforms, Ellipsoid, BoundingSphere, projections, coordinate conversions. Use when converting between coordinate systems, computing positions on the ellipsoid, performing spatial intersection tests, building model matrices, or working with geographic projections.
11 cesiumjs-interaction ~8 CesiumJS interaction and picking - ScreenSpaceEventHandler, Scene.pick, Scene.drillPick, Scene.pickPosition, mouse and touch events. Use when handling user clicks on the globe, selecting entities or 3D Tiles features, registering multi-key-modifier input actions, implementing hover effects, or building drag-based interactions.
12 cesiumjs-models-particles ~21 CesiumJS models, glTF, and particle effects - Model, ModelAnimation, ModelNode, EdgeDisplayMode, ParticleSystem, emitters, GPM extensions. Use when loading glTF/GLB 3D models, controlling edge rendering, playing model animations, positioning particle effects like fire or smoke, or working with geospatial positioning metadata.
13 cesiumjs-core-utilities ~46 CesiumJS core utilities and networking - Resource, Color, Event, Request, RequestScheduler, error handling, helper functions, feature detection. Use when fetching remote data, managing HTTP requests, working with colors, handling events, debugging errors, or using utility functions like defined, clone, or buildModuleUrl.

Domain 1: cesiumjs-viewer-setup (~70 entries)

Core Initialization

  • Viewer
  • CesiumWidget
  • Scene

Platform Configuration

  • Ion
  • IonResource
  • GoogleMaps
  • ITwinPlatform
  • ITwinData

Widgets

  • Animation
  • BaseLayerPicker
  • Cesium3DTilesInspector
  • CesiumInspector
  • FullscreenButton
  • Geocoder
  • HomeButton
  • I3SBuildingSceneLayerExplorer
  • InfoBox
  • NavigationHelpButton
  • PerformanceWatchdog
  • ProjectionPicker
  • SceneModePicker
  • SelectionIndicator
  • Timeline
  • VoxelInspector
  • VRButton
  • SvgPathBindingHandler

ViewModels

  • AnimationViewModel
  • BaseLayerPickerViewModel
  • Cesium3DTilesInspectorViewModel
  • CesiumInspectorViewModel
  • ClockViewModel
  • FullscreenButtonViewModel
  • GeocoderViewModel
  • HomeButtonViewModel
  • I3sBslExplorerViewModel
  • InfoBoxViewModel
  • NavigationHelpButtonViewModel
  • PerformanceWatchdogViewModel
  • ProjectionPickerViewModel
  • ProviderViewModel
  • SceneModePickerViewModel
  • SelectionIndicatorViewModel
  • ToggleButtonViewModel
  • VoxelInspectorViewModel
  • VRButtonViewModel

Widget Infrastructure

  • Command
  • createCommand

Viewer Mixins

  • viewerCesium3DTilesInspectorMixin
  • viewerCesiumInspectorMixin
  • viewerDragDropMixin
  • viewerPerformanceWatchdogMixin
  • viewerVoxelInspectorMixin

Geocoder Services

  • GeocoderService (interface)
  • BingMapsGeocoderService
  • CartographicGeocoderService
  • GoogleGeocoderService
  • IonGeocoderService
  • OpenCageGeocoderService
  • PeliasGeocoderService

Factory Helpers

  • createWorldImageryAsync
  • createWorldTerrainAsync
  • createWorldBathymetryAsync
  • createGooglePhotorealistic3DTileset
  • createOsmBuildingsAsync

Credits

  • Credit
  • CreditDisplay
  • FrameRateMonitor

Enums

  • SceneMode
  • MapMode2D
  • GeocodeType
  • IonGeocodeProviderType
  • IonWorldImageryStyle

Domain 2: cesiumjs-camera (~10 entries)

Core

  • Camera
  • CameraEventAggregator
  • ScreenSpaceCameraController
  • EntityView

Debug

  • DebugCameraPrimitive

Types

  • HeadingPitchRange

Enums

  • CameraEventType
  • KeyboardEventModifier

Key Methods (documented as patterns)

  • Camera.flyTo
  • Camera.lookAt
  • Camera.setView
  • Camera.flyHome
  • Camera.flyToBoundingSphere
  • Camera.viewBoundingSphere
  • Camera.lookAtTransform
  • Camera.move / moveForward / moveBackward / moveUp / moveDown / moveLeft / moveRight
  • Camera.zoomIn / zoomOut
  • Camera.rotate / rotateUp / rotateDown / rotateLeft / rotateRight
  • Camera.lookUp / lookDown / lookLeft / lookRight
  • ScreenSpaceCameraController.enableTilt / enableZoom / enableRotate
  • ScreenSpaceCameraController.minimumZoomDistance / maximumZoomDistance
  • ScreenSpaceCameraController.maximumTiltAngle

Domain 3: cesiumjs-entities (~61 entries)

Entity Core

  • Entity
  • EntityCollection
  • EntityCluster
  • CompositeEntityCollection

Graphics Types (17)

  • BillboardGraphics
  • BoxGraphics
  • Cesium3DTilesetGraphics
  • CorridorGraphics
  • CylinderGraphics
  • EllipseGraphics
  • EllipsoidGraphics
  • LabelGraphics
  • ModelGraphics
  • PathGraphics
  • PlaneGraphics
  • PointGraphics
  • PolygonGraphics
  • PolylineGraphics
  • PolylineVolumeGraphics
  • RectangleGraphics
  • WallGraphics

DataSources

  • DataSource (interface)
  • CustomDataSource
  • CzmlDataSource
  • GeoJsonDataSource
  • GpxDataSource
  • KmlDataSource

DataSource Infrastructure

  • DataSourceClock
  • DataSourceCollection
  • DataSourceDisplay

KML Helpers

  • KmlCamera
  • KmlFeatureData
  • KmlLookAt
  • KmlTour
  • KmlTourFlyTo
  • KmlTourWait

Visualizers

  • Visualizer (interface)
  • BillboardVisualizer
  • Cesium3DTilesetVisualizer
  • GeometryVisualizer
  • LabelVisualizer
  • ModelVisualizer
  • PathVisualizer
  • PointVisualizer
  • PolylineVisualizer

GeometryUpdaters

  • GeometryUpdater (base)
  • GroundGeometryUpdater
  • BoxGeometryUpdater
  • CorridorGeometryUpdater
  • CylinderGeometryUpdater
  • EllipseGeometryUpdater
  • EllipsoidGeometryUpdater
  • PlaneGeometryUpdater
  • PolygonGeometryUpdater
  • PolylineGeometryUpdater
  • PolylineVolumeGeometryUpdater
  • RectangleGeometryUpdater
  • WallGeometryUpdater

Functions

  • exportKml

Enums

  • HeightReference
  • HorizontalOrigin
  • VerticalOrigin
  • LabelStyle
  • ColorBlendMode
  • ShadowMode
  • PathMode

Ownership Rule

*Graphics classes belong here. *Geometry classes belong in cesiumjs-primitives. This is the Entity API vs Primitive API divide.

Domain 4: cesiumjs-3d-tiles (~48 entries)

3D Tiles Core

  • Cesium3DTileset
  • Cesium3DTile
  • Cesium3DTileContent
  • Cesium3DTileFeature
  • Cesium3DTilePointFeature
  • Cesium3DTileStyle
  • MVTDataProvider

Style Expressions

  • ConditionsExpression
  • Expression
  • StyleExpression

Voxels

  • VoxelPrimitive
  • VoxelProvider (interface)
  • Cesium3DTilesVoxelProvider
  • VoxelContent
  • VoxelCell
  • VoxelShapeType (enum)

Metadata

  • MetadataClass
  • MetadataClassProperty
  • MetadataEnum
  • MetadataEnumValue
  • MetadataSchema
  • PickedMetadataInfo
  • MetadataComponentType (enum)
  • MetadataType (enum)

I3S

  • I3SDataProvider
  • I3SFeature
  • I3SField
  • I3SGeometry
  • I3SLayer
  • I3SNode
  • I3SStatistics
  • I3SSublayer
  • I3SSymbology

Clipping

  • ClippingPlane
  • ClippingPlaneCollection
  • ClippingPolygon
  • ClippingPolygonCollection

Specialized Content

  • GaussianSplat3DTileContent
  • TimeDynamicPointCloud
  • VectorGltf3DTileContent

Terrain Bridge (experimental)

  • Cesium3DTilesTerrainData
  • Cesium3DTilesTerrainProvider

Rendering Config

  • PointCloudShading
  • Cesium3DTileColorBlendMode (enum)
  • Cesium3DTileset.edgeDisplayMode (uses EdgeDisplayMode; primary enum home: Domain 12)

Enums

  • ClassificationType

Domain 5: cesiumjs-imagery (~30 entries)

Core

  • ImageryProvider (interface)
  • ImageryLayer
  • ImageryLayerCollection
  • ImageryLayerFeatureInfo

Providers (17)

  • ArcGisMapServerImageryProvider
  • ArcGisMapService
  • BingMapsImageryProvider
  • Google2DImageryProvider
  • GoogleEarthEnterpriseImageryProvider
  • GoogleEarthEnterpriseMapsProvider
  • GridImageryProvider
  • IonImageryProvider
  • MapboxImageryProvider
  • MapboxStyleImageryProvider
  • OpenStreetMapImageryProvider
  • SingleTileImageryProvider
  • TileCoordinatesImageryProvider
  • TileMapServiceImageryProvider
  • UrlTemplateImageryProvider
  • WebMapServiceImageryProvider
  • WebMapTileServiceImageryProvider

Utilities

  • TimeDynamicImagery
  • GetFeatureInfoFormat
  • GoogleEarthEnterpriseMetadata

Discard Policies

  • DiscardEmptyTileImagePolicy
  • DiscardMissingTileImagePolicy
  • NeverTileDiscardPolicy

Enums

  • ArcGisBaseMapType
  • BingMapsStyle
  • SplitDirection

Domain 6: cesiumjs-terrain-environment (~35 entries)

Terrain Core

  • TerrainProvider (interface)
  • TerrainData (interface)
  • Terrain (helper)

Terrain Providers

  • ArcGISTiledElevationTerrainProvider
  • CesiumTerrainProvider
  • CustomHeightmapTerrainProvider
  • EllipsoidTerrainProvider
  • GoogleEarthEnterpriseTerrainProvider
  • VRTheWorldTerrainProvider

Terrain Data

  • GoogleEarthEnterpriseTerrainData
  • HeightmapTerrainData
  • QuantizedMeshTerrainData

Terrain Utilities

  • sampleTerrain
  • sampleTerrainMostDetailed
  • TileAvailability

Globe

  • Globe
  • GlobeTranslucency

Atmosphere and Sky

  • SkyBox
  • SkyAtmosphere
  • Atmosphere
  • Fog
  • DynamicEnvironmentMapManager

Celestial Bodies

  • Sun
  • Moon

Lighting

  • SunLight
  • DirectionalLight
  • Light (interface)
  • ShadowMap

Panoramas

  • Panorama (interface)
  • PanoramaProvider (interface)
  • EquirectangularPanorama
  • CubeMapPanorama
  • GoogleStreetViewCubeMapPanoramaProvider

Functions

  • createElevationBandMaterial

Enums

  • DynamicAtmosphereLightingType
  • HeightmapEncoding
  • ShadowMode (cross-ref from Domain 3)

Domain 7: cesiumjs-primitives (~82 entries)

Primitives

  • Primitive
  • PrimitiveCollection
  • ClassificationPrimitive
  • GroundPrimitive
  • GroundPolylinePrimitive
  • GeoJsonPrimitive

Geometry Infrastructure

  • Geometry
  • GeometryAttribute
  • GeometryAttributes
  • GeometryFactory
  • GeometryInstance
  • GeometryInstanceAttribute
  • GeometryPipeline
  • VertexFormat

Geometry Types (31)

  • BoxGeometry / BoxOutlineGeometry
  • CircleGeometry / CircleOutlineGeometry
  • CoplanarPolygonGeometry / CoplanarPolygonOutlineGeometry
  • CorridorGeometry / CorridorOutlineGeometry
  • CylinderGeometry / CylinderOutlineGeometry
  • EllipseGeometry / EllipseOutlineGeometry
  • EllipsoidGeometry / EllipsoidOutlineGeometry
  • FrustumGeometry / FrustumOutlineGeometry
  • GroundPolylineGeometry
  • PlaneGeometry / PlaneOutlineGeometry
  • PolygonGeometry / PolygonOutlineGeometry
  • PolylineGeometry
  • PolylineVolumeGeometry / PolylineVolumeOutlineGeometry
  • RectangleGeometry / RectangleOutlineGeometry
  • SimplePolylineGeometry
  • SphereGeometry / SphereOutlineGeometry
  • WallGeometry / WallOutlineGeometry

Helper

  • PolygonHierarchy

Appearances

  • Appearance
  • DebugAppearance
  • EllipsoidSurfaceAppearance
  • MaterialAppearance
  • PerInstanceColorAppearance
  • PolylineColorAppearance
  • PolylineMaterialAppearance

Instance Attributes

  • ColorGeometryInstanceAttribute
  • DistanceDisplayConditionGeometryInstanceAttribute
  • ShowGeometryInstanceAttribute

Primitive Collections

  • BillboardCollection
  • LabelCollection
  • PolylineCollection
  • PointPrimitiveCollection
  • CloudCollection
  • BufferPointCollection
  • BufferPolylineCollection
  • BufferPolygonCollection

Primitive Items

  • Billboard
  • Label
  • Polyline
  • PointPrimitive
  • CumulusCloud
  • BufferPoint
  • BufferPolyline
  • BufferPolygon

Buffer Primitive Materials

  • BufferPrimitiveMaterial
  • BufferPointMaterial
  • BufferPolylineMaterial
  • BufferPolygonMaterial

Debug

  • DebugModelMatrixPrimitive
  • ViewportQuad

Functions

  • createTangentSpaceDebugPrimitive

Enums

  • ArcType
  • CornerType
  • PrimitiveType
  • CloudType
  • StripeOrientation
  • WindingOrder

Domain 8: cesiumjs-materials-shaders (~20 entries)

Material System

  • Material
  • MaterialSupport

Image-Based Lighting

  • ImageBasedLighting

Post-Processing

  • PostProcessStage
  • PostProcessStageCollection
  • PostProcessStageComposite
  • PostProcessStageLibrary

Post-Processing Enums

  • PostProcessStageSampleMode
  • Tonemapper

Rendering State

  • BlendingState

Render State Enums

  • BlendEquation
  • BlendFunction
  • BlendOption
  • CullFace
  • DepthFunction
  • StencilFunction
  • StencilOperation

Texture Config

  • CompressedTextureBuffer
  • TextureMagnificationFilter
  • TextureMinificationFilter

Functions

  • createElevationBandMaterial (cross-ref from Domain 6)
  • srgbToLinear

Ownership Rules

Material (Fabric): Primary home. Consumed by MaterialAppearance on Primitives and by Entity *Graphics via Material*Property (Domain 9). ImageBasedLighting: Primary home. Used by Model.imageBasedLighting and Cesium3DTileset.imageBasedLighting. PostProcessStage/Library: Primary home. Applied to Scene.postProcessStages. CustomShader, TextureUniform, and shader enums: moved to Domain 14 (cesiumjs-custom-shader). Cross-reference only.

Domain 9: cesiumjs-time-properties (~57 entries)

Time Core

  • Clock
  • JulianDate
  • GregorianDate
  • TimeInterval
  • TimeIntervalCollection
  • LeapSecond
  • Iso8601

Property Interfaces

  • Property
  • PositionProperty
  • MaterialProperty

Value Properties

  • ConstantProperty
  • ConstantPositionProperty
  • SampledProperty
  • SampledPositionProperty
  • CallbackProperty
  • CallbackPositionProperty
  • CompositeProperty
  • CompositePositionProperty
  • CompositeMaterialProperty
  • ReferenceProperty
  • TimeIntervalCollectionProperty
  • TimeIntervalCollectionPositionProperty
  • PropertyArray
  • PositionPropertyArray
  • PropertyBag
  • NodeTransformationProperty

Velocity Properties

  • VelocityOrientationProperty
  • VelocityVectorProperty

Material Properties

  • ColorMaterialProperty
  • ImageMaterialProperty
  • GridMaterialProperty
  • StripeMaterialProperty
  • CheckerboardMaterialProperty
  • PolylineArrowMaterialProperty
  • PolylineDashMaterialProperty
  • PolylineGlowMaterialProperty
  • PolylineOutlineMaterialProperty

Splines

  • Spline (base)
  • CatmullRomSpline
  • HermiteSpline
  • LinearSpline
  • QuaternionSpline
  • ConstantSpline
  • SteppedSpline
  • MorphWeightSpline

Interpolation

  • HermitePolynomialApproximation
  • LagrangePolynomialApproximation
  • LinearApproximation
  • PackableForInterpolation

Animation Helpers

  • EasingFunction
  • VideoSynchronizer

Enums

  • ClockRange
  • ClockStep
  • TimeStandard
  • ExtrapolationType
  • TrackingReferenceFrame
  • ReferenceFrame

Design Decision

Properties live here (not with Entities) because they are the temporal data-binding layer. SampledProperty and CallbackProperty are meaningless without Clock/JulianDate. MaterialProperties (ColorMaterialProperty, etc.) are Property subclasses that vary over time. The Material class (Fabric system for Primitives) belongs in cesiumjs-materials-shaders.

Domain 10: cesiumjs-spatial-math (~55 entries)

Vectors and Points

  • Cartesian2
  • Cartesian3
  • Cartesian4
  • Cartographic
  • Spherical

Matrices

  • Matrix2
  • Matrix3
  • Matrix4

Rotation/Orientation

  • Quaternion
  • HeadingPitchRoll

Transforms

  • Transforms
  • SceneTransforms
  • TranslationRotationScale

Ellipsoid and Geodesy

  • Ellipsoid
  • EllipsoidGeodesic
  • EllipsoidRhumbLine
  • EllipsoidTangentPlane

Bounding Volumes

  • BoundingRectangle
  • BoundingSphere
  • AxisAlignedBoundingBox
  • OrientedBoundingBox
  • CullingVolume

Geometric Primitives

  • Plane
  • Ray
  • Rectangle
  • NearFarScalar
  • Interval
  • Occluder

Projections and Tiling

  • GeographicProjection
  • GeographicTilingScheme
  • MapProjection (interface)
  • WebMercatorProjection
  • WebMercatorTilingScheme
  • TilingScheme (interface)

Frustums

  • PerspectiveFrustum
  • PerspectiveOffCenterFrustum
  • OrthographicFrustum
  • OrthographicOffCenterFrustum

Intersections

  • IntersectionTests
  • Intersections2D

Math Utilities

  • Math (CesiumMath)

Polynomial Solvers

  • CubicRealPolynomial
  • QuadraticRealPolynomial
  • QuarticRealPolynomial
  • TridiagonalSystemSolver

Specialized

  • HilbertOrder
  • Simon1994PlanetaryPositions
  • Stereographic

Enums

  • Axis
  • Intersect
  • Visibility
  • ComponentDatatype
  • IndexDatatype

Domain 11: cesiumjs-interaction (~8 entries)

Event Handling

  • ScreenSpaceEventHandler
  • ScreenSpaceEventType (enum)
  • KeyboardEventModifier array support on setInputAction/getInputAction/removeInputAction

Functions

  • addDrillPickedResults
  • computePickingDrawingBufferRectangle

Scene Picking Methods (documented as patterns)

  • Scene.pick()
  • Scene.drillPick()
  • Scene.pickPosition()
  • Scene.pickVoxel()
  • Scene.pickAsync()

Types Returned by Picking (cross-refs)

  • Cesium3DTileFeature (Domain 4)
  • ModelFeature (Domain 12)
  • Entity (Domain 3)
  • PickedMetadataInfo (Domain 4)

Key Patterns to Document

  • Entity selection with click handler
  • 3D Tiles feature picking and property inspection
  • Terrain position picking (lon/lat/height from click)
  • Multi-pick with drillPick
  • Hover highlighting with mousemove
  • Drag-based drawing and measurement
  • Coordinate readout on click
  • Conditional behavior based on picked object type

Domain 12: cesiumjs-models-particles (~21 entries)

Model Core

  • Model
  • ModelAnimation
  • ModelAnimationCollection
  • ModelFeature
  • ModelNode

Particle System

  • ParticleSystem
  • Particle
  • ParticleBurst
  • ParticleEmitter (base)
  • BoxEmitter
  • CircleEmitter
  • ConeEmitter
  • SphereEmitter

GPM Extension

  • AnchorPointDirect
  • AnchorPointIndirect
  • CorrelationGroup
  • GltfGpmLocal
  • Spdcf

Enums

  • ModelAnimationLoop
  • EdgeDisplayMode

Cross-References

  • CustomShader (primary: Domain 8)
  • ImageBasedLighting (primary: Domain 8)
  • ClippingPlane/ClippingPolygon (primary: Domain 4)
  • ModelGraphics (primary: Domain 3)
  • Cesium3DTileset.edgeDisplayMode (primary tileset setup: Domain 4)

Domain 13: cesiumjs-core-utilities (~46 entries)

Networking

  • Resource
  • Request
  • RequestScheduler
  • RequestErrorEvent
  • DefaultProxy
  • Proxy (interface)
  • TrustedServers

Worker Processing

  • TaskProcessor

Color and Display

  • Color
  • DistanceDisplayCondition
  • PinBuilder

Events

  • Event
  • EventHelper

Error Types

  • DeveloperError
  • RuntimeError

Data Structures

  • AssociativeArray
  • Queue

Detection and State

  • FeatureDetection
  • Fullscreen
  • Frozen

Global Functions

  • defined
  • clone
  • combine
  • createGuid
  • buildModuleUrl
  • formatError
  • destroyObject
  • getAbsoluteUri
  • getBaseUri
  • getExtensionFromUri
  • getFilenameFromUri
  • getImagePixels
  • getTimestamp
  • isLeapYear
  • mergeSort
  • objectToQuery
  • queryToObject
  • binarySearch
  • subdivideArray
  • writeTextToCanvas
  • srgbToLinear (cross-ref from Domain 8)
  • barycentricCoordinates
  • pointInsideTriangle

Enums

  • RequestState
  • RequestType
  • PixelDatatype
  • PixelFormat
  • WebGLConstants

Notes

  • defaultValue was removed in v1.134 — use ?? operator instead
  • Frozen.EMPTY_OBJECT and Frozen.EMPTY_ARRAY replace defaultValue.EMPTY_OBJECT (v1.128)

Domain 14: cesiumjs-custom-shader (~7 entries)

CustomShader Core

  • CustomShader
  • TextureUniform

CustomShader Enums

  • CustomShaderMode
  • CustomShaderTranslucencyMode
  • LightingModel
  • UniformType
  • VaryingType

Ownership Rules

CustomShader: Primary home. Applied to Model.customShader, Cesium3DTileset.customShader, and VoxelPrimitive.customShader (fragment-only subset). Model/tileset/voxel setup lives in Domains 12 / 4 / 4 respectively; shader authoring lives here. TextureUniform: Primary home. Sole consumer is CustomShader uniforms of UniformType.SAMPLER_2D. UniformType, VaryingType, LightingModel, CustomShaderMode, CustomShaderTranslucencyMode: Primary home. All five are consumed exclusively by CustomShader. Cesium3DTileStyle + CustomShader: undefined behavior per upstream JSDoc. Choose one per tileset.

Notes

  • 1.139 breaking change (#13135): UINT metadata no longer cast to signed int in shaders.
  • 1.130 breaking change (#12636): VoxelPrimitive FragmentInput restructured — fsInput.voxel.* replaced by fsInput.attributes.positionEC/normalEC.
  • Cesium3DTileset.customShader is marked @experimental — may change without standard deprecation policy.

Cross-Cutting Ownership Rules

These rules prevent activation collisions (multiple skills triggering for the same prompt):

Concept Primary Domain Cross-Referenced In Rule
*Graphics classes 3 (entities) 7 (primitives) Entity API = *Graphics; Primitive API = *Geometry
*Geometry classes 7 (primitives) 3 (entities) Same boundary, other direction
CustomShader 14 (custom-shader) 4 (3d-tiles), 8 (materials-shaders), 12 (models) Shader authoring is a distinct skill from model/tileset loading or material/post-processing
ImageBasedLighting 8 (materials-shaders) 4 (3d-tiles), 12 (models) PBR lighting is a rendering concept
ClippingPlane/Polygon 4 (3d-tiles) 6 (terrain-env), 12 (models) Most common use is 3D Tiles clipping
Material (Fabric) 8 (materials-shaders) 7 (primitives) Primitives consume Materials via Appearances
Material*Property 9 (time-properties) 3 (entities) Property subclasses (temporal) vs Material class (Fabric)
Ion/IonResource 1 (viewer-setup) 5 (imagery) Setup-time config vs provider usage
createOsmBuildingsAsync 1 (viewer-setup) 4 (3d-tiles) Factory helper vs tileset config
EntityView 2 (camera) 3 (entities) Camera tracking = camera concern
ShadowMap 6 (terrain-env) 8 (materials-shaders) Scene-level rendering config
SceneTransforms 10 (spatial-math) 1 (viewer-setup) Coordinate transform utility

July 2026 / CesiumJS 1.143 Coverage

The 1.143 release has two feature additions and four runtime fixes:

1.143 surface Canonical skill coverage
PathGraphics.materialMode and PathMode.PORTIONS / WHOLE cesiumjs-entities for the graphics API; cesiumjs-time-properties for interval, sampled, and CZML workflows
Automatic KHR_meshopt_compression v1 attribute codec and COLOR filter decoding cesiumjs-models-particles/REFERENCE.md; cross-reference from cesiumjs-3d-tiles
Billboard loading with replaced global/custom Promise implementations cesiumjs-primitives compatibility guidance
Correct cartographic routing for internal Scene.updateHeight callbacks cesiumjs-terrain-environment clamping guidance
Invalid glTF sampler wrap-mode fallback to TextureWrap.REPEAT cesiumjs-models-particles/REFERENCE.md authoring guidance
Zero-width BufferPointCollection outlines no longer bleeding into fills cesiumjs-primitives buffer guidance

The July CAD announcement extends the workflow surface beyond newly exported APIs:

July-announced surface Support boundary
CAD-style glTF lines, points, edges, and constant-LOD textures cesiumjs-models-particles/REFERENCE.md maps EXT_mesh_primitive_restart, EXT_mesh_primitive_edge_visibility, BENTLEY_materials_line_style, BENTLEY_materials_point_style, and EXT_textureInfo_constant_lod
BENTLEY_materials_planar_fill Explicitly marked upcoming and unsupported in 1.143; do not generate it as a working CesiumJS path

Recently Added APIs (v1.120-v1.143)

Version Addition Domain
v1.122 CallbackPositionProperty 9
v1.123 maximumTiltAngle (Camera) 2
v1.124 TrackingReferenceFrame, Entity.trackingReferenceFrame 9, 3
v1.124 ITwinPlatform 1
v1.128 ITwinData, Frozen 1, 13
v1.128 Frozen.EMPTY_OBJECT, Frozen.EMPTY_ARRAY 13
v1.133 Ellipsoid.MARS 10
v1.134 Google2DImageryProvider 5
v1.134 defaultValue removed (use ??) 13
v1.135 Cesium3DTilesTerrainProvider (experimental) 4
v1.136 Scene.pickAsync 11
v1.139 EquirectangularPanorama 6
v1.139 CubeMapPanorama 6
v1.139 GoogleStreetViewCubeMapPanoramaProvider 6
v1.140 BufferPointCollection, BufferPolylineCollection, BufferPolygonCollection 7
v1.142 GeoJsonPrimitive 7
v1.142 MVTDataProvider 4
v1.142 EdgeDisplayMode 12
v1.142 multiple KeyboardEventModifier keys in ScreenSpaceEventHandler 11
v1.143 PathMode, PathGraphics.materialMode 3 (property workflows in 9)
v1.143 KHR_meshopt_compression decoding (loader behavior) 12 (3D Tiles cross-reference in 4)

Skill File See Also Cross-References

Skill See Also
cesiumjs-viewer-setup camera, entities, imagery, terrain-environment
cesiumjs-camera spatial-math, interaction, entities
cesiumjs-entities time-properties, primitives, interaction
cesiumjs-3d-tiles custom-shader, interaction, terrain-environment
cesiumjs-imagery viewer-setup, terrain-environment
cesiumjs-terrain-environment viewer-setup, imagery, spatial-math
cesiumjs-primitives entities, materials-shaders, spatial-math
cesiumjs-materials-shaders custom-shader, primitives, 3d-tiles, models-particles
cesiumjs-time-properties entities, viewer-setup, models-particles
cesiumjs-spatial-math camera, primitives, terrain-environment
cesiumjs-interaction entities, 3d-tiles, camera
cesiumjs-models-particles custom-shader, materials-shaders, entities, 3d-tiles
cesiumjs-core-utilities viewer-setup, imagery, entities
cesiumjs-custom-shader materials-shaders, 3d-tiles, models-particles