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    Class CascadedShadowsPlugin

    Cascaded Shadow Maps (CSM) plugin for high-quality directional light shadows across large scenes.

    This plugin implements cascaded shadow mapping to provide better shadow quality across different distances from the camera by splitting the view frustum into multiple cascades, each with its own shadow map at an appropriate resolution.

    Features:

    • Multiple cascade splitting modes: uniform, logarithmic, practical, and custom
    • Automatic light attachment to first directional light found
    • Configurable shadow parameters per light
    • Material extension for proper shadow sampling
    • Optional fade between cascades

    Original three-csm implementation - https://github.com/StrandedKitty/three-csm

    const viewer = new ThreeViewer({
        plugins: [new CascadedShadowsPlugin()]
    })

    const light = new DirectionalLight2(0xffffff, 1.5)
    viewer.scene.addObject(light)

    const csmPlugin = viewer.getPlugin(CascadedShadowsPlugin)!
    csmPlugin.setLightParams({
        cascades: 4,
        shadowMapSize: 1024,
        lightMargin: 100
    }, light)

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    _dirty _viewer? _viewerListeners attachToFirstLight breaks camera? constructor customSplitsCallback? enabled extendedBreaks fade frustums isViewerPluginSync light? lights mainFrustum materialExtension maxFar mode parent uiConfig OldPluginType? PluginType

    Accessors

    cascades dirty

    Methods

    _getBreaks _initCascades _onViewerEvent _storeKey _updateFrustums _updateShadowBounds cameraNeedsUpdate disable dispose enable exportState fromJSON importState injectInclude isDisabled onAdded onRemove refreshAttachedLight refreshLights setDirty setLightParams toJSON update

    Constructors

    Properties

    Protected_dirty

    _dirty: boolean = false

    Protected Optional_viewer

    _viewer?: ThreeViewer

    Protected_viewerListeners

    _viewerListeners: { preRender: () => void } = ...
    attachToFirstLight: boolean = true

    Automatically attach to first found directional light in the scene that casts shadow, if none is attached yet. Call refreshAttachedLight to manually trigger light search.

    breaks: number[] = []

    Cascade break points in normalized depth [0-1]

    camera?: ICamera<ICameraEventMap>

    Current camera used for frustum calculations

    constructor: typeof AViewerPluginSync & typeof AViewerPlugin
    customSplitsCallback?: (
        amount: number,
        near: number,
        far: number,
        breaks: number[],
    ) => void

    Custom callback for defining cascade splits when mode is 'custom'

    enabled: boolean = true

    Enable/disable the cascaded shadow maps plugin

    extendedBreaks: (Vector3 | Vector2)[] = []

    Extended break data for shader uniforms

    fade: boolean

    Enable fade between cascades for smoother transitions

    frustums: CSMFrustum[] = []

    Individual frustums for each cascade

    isViewerPluginSync: true = ...
    light?: DirectionalLight & IObject3D<
        IObject3DEventMap,
        undefined
        | IGeometry<NormalBufferAttributes, BufferGeometryEventMap>,
        undefined | IMaterial<IMaterialEventMap> | IMaterial<IMaterialEventMap>[],
    >

    The main directional light that CSM will be applied to

    lights: DirectionalLight[] = []

    Generated directional lights for each cascade

    mainFrustum: CSMFrustum

    Main camera frustum for cascade calculation

    materialExtension: MaterialExtension = ...
    maxFar: number = 100000

    Maximum far distance for shadow calculation

    mode: "uniform" | "logarithmic" | "practical" | "custom" = 'practical'

    Cascade splitting mode: uniform, logarithmic, practical, or custom

    parent: Object3D = ...

    Parent object containing all CSM lights

    uiConfig: UiObjectConfig = ...
    OldPluginType?: string
    PluginType: "CascadedShadowsPlugin" = 'CascadedShadowsPlugin'

    Accessors

    Methods

    Protected_getBreaks

    Protected_initCascades

    Protected_onViewerEvent

    Protected_storeKey

    Protected_updateFrustums

    Protected_updateShadowBounds

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