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Enlighten API 4.03 Documentation
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  • class Enlighten SetProbeSetTransformInfo
  • class Enlighten SetTransparencySamplePositionOffsetInfo
  • class Enlighten SetVisibilityBitsInfo
  • class Enlighten SolveBounceTask
  • class Enlighten SortedLights
  • class Enlighten SphereVolume
  • class Enlighten Spotlight
  • class Enlighten SystemAlbedoData
  • class Enlighten SystemDependencies
  • class Enlighten SystemGrouping
  • class Enlighten TaskProcessor
  • class Enlighten TransparencyWorkspace
  • class Enlighten Triangle2D
  • class Enlighten TriggerVolumeTransparencyGeneric
  • class Enlighten UpdateEnvironmentInfo
  • class Enlighten UpdateLightCommandGeneric
  • class Enlighten UpdateLightInfo
  • class Enlighten UpdateLightOptions
  • class Enlighten UpdateManagerLight
  • class Enlighten UpdateManagerProperties
  • class Enlighten UpdateManagerWorkerProperties
  • class Enlighten Vertex2D
  • class Enlighten VisibilityBuffer
  • class Enlighten WorkerFunctionCommand
  • class Enlighten WorkerFunctionParameterCommand
  • class Enlighten WorkerFunctionTwoParametersCommand
  • class Enlighten WorkerFunctorCommand
  • class Enlighten WorkerObjectFunctionCommand
  • class Enlighten WorkerThreadData
  • class Enlighten WorkspaceAllocator
  • namespace Enlighten Errors
  • namespace Enlighten Helpers
  • namespace Enlighten Iff
  • namespace Enlighten InputLightingValidation
  • namespace Enlighten Itt
  • namespace Enlighten OutputTextureState
  • namespace Enlighten UE4
    • class Enlighten UE4 FourVec3s
    • class Enlighten UE4 RectLight
    • class Enlighten UE4 UE4InputLight
      • struct Enlighten UE4 UE4InputLight CachedData
    • class Enlighten UE4 UnrealDirectionalLight
    • class Enlighten UE4 UnrealDirectionalLightFunction
    • struct Enlighten UE4 InverseSquareFalloffModel
    • struct Enlighten UE4 UnrealFalloffModel
  • namespace Enlighten Version
  • struct Enlighten AllFilter
  • struct Enlighten BakeInputTexture
  • struct Enlighten CachedLightSelector
  • struct Enlighten CachedLightWriter
  • struct Enlighten CanQuickShade
  • struct Enlighten CanQuickShade< LIGHT_TYPE_DIRECTIONAL_LIGHT >
  • struct Enlighten CountLightSizeVisitor
  • struct Enlighten CullCluster
  • struct Enlighten CullClusterGroup
  • struct Enlighten CullingIterator
  • struct Enlighten CullingIterator< LIGHT_TYPE_INVALID, Culler >
  • struct Enlighten CullSystem
  • struct Enlighten ExcludeQuickShadeFilter
  • struct Enlighten HashLightVisitor
  • struct Enlighten InstanceDescMinimal
  • struct Enlighten LightSelector
  • struct Enlighten LightTypeInfo
  • struct Enlighten NullSurroundingsSampler
  • struct Enlighten PipelineInstanceMaterial
  • struct Enlighten PipelineMaterial
  • struct Enlighten PipelineRadiosityProperties
  • struct Enlighten PipelineWorldAxes
  • struct Enlighten PixelBarycentricWeights
  • struct Enlighten PixelCoord
  • struct Enlighten PointProjectionVertex
  • struct Enlighten PppiAtlasFootprint
  • struct Enlighten PppiAtlasMaxima
  • struct Enlighten PppiAtlasUpdateData
  • struct Enlighten PppiAtlasUpdateRequirements
  • struct Enlighten PppiClipmapUpdateData
  • struct Enlighten PppiClipmapUpdateRequirements
  • struct Enlighten PppiConfiguration
  • struct Enlighten PppiIrradiance
  • struct Enlighten PppiIrradiance16
  • struct Enlighten PppiOutputTextureRequirements
    Calendars
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struct Enlighten UE4 UE4InputLight CachedData

    This is the documentation for Enlighten.

    struct Enlighten UE4 UE4InputLight CachedData

    Sept 09, 2025

    struct Enlighten::UE4::UE4InputLight::CachedData

        └>Enlighten::InputLightBase

    Cached data for a UE4InputLight.

    Functions

    Name Description
    CachedData(UE4InputLight &, const void *)

    Constructor.

    DistanceFilter(float)

    Return true if this light affects a system at the specified distance from the viewer.

    GetCosCullAngle()

    Accessors.

    GetCosOuterCone()

    Accessors.

    GetIntensity()

    Accessors.

    GetInvCosConeDifference()

    Accessors.

    GetNegativeSinCullAngle()

    Accessors.

    GetSqrRadius()

    Accessors.

    Hash(Helpers::Hasher &, Geo::u32, Geo::u32)

    Hash the light data.

    InputLightBase(eLightType, bool)

    Constructor.

    InputLightBase(eLightType)

    Constructor.

    IsIntersectingCluster(const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &)

    Complex light V normalBoundingBox intersection test.

    IsIntersectingClusterGroup(const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &)

    Light v ClusterGroup Bounding box intersection test.

    IsIntersectingSystem(const Geo::v128 &, const Geo::v128 &)

    Simple Light V system BoundingBox intersection test.

    ShadeFourSamples(const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, Geo::u32, Geo::v128 &, Geo::v128 &, Geo::v128 &, Geo::v128 &)

    Shades the given samples.

    ShadeQuad(const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, Geo::u32, Geo::u32)

    Shades the given quad.

    ShadeQuadIntensities(const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &, const Geo::v128 &)

    Believe it or not, making this function force-inline is actually a huge perf win.

    Variables

    Name Description
    bool bFullSphere

    Full sphere?

    bool bLineLight

    True if this light has line-based falloff instead of point.

    Geo::v128 BoundsMax

    Axis aligned bounding box.

    Geo::v128 BoundsMin

    Axis aligned bounding box.

    bool bSpotlight

    Is this a spotlight?

    Geo::v128 CosOuterCone_InvCosConeDiff_CosCullAngle_NegSinCullAngle

    Pack four floats into a single v128 to avoid bloat.

    Geo::v128 Direction

    World space direction of the light.

    Geo::u32 HasVisibility

    Has visibility?

    const float * IESProfileTable

    IES profile table.

    Geo::v128 Intensity_SqrRadius

    RGB intensity of the light, plus square-radius packed into the w component.

    Geo::v128 LightPos

    World space position of light.

    bool m_HasChanged

    Whether the light has changed since it was last given to the extended direct lighting api.

    const eLightType m_LightType

    Type of input light corresponding to an eLightType enum value.

    Geo::u64 m_Padding

    Unused (this class is usually extended by one that starts with multiple v128s)

    RadialFalloffModelType::CachedData RadialFalloffModel

    Cached data for radial falloff model.

    const Geo::u8 * VisibilityData

    Visibility data.

    Geo::s64 VisibilityDataU64

    Visibility data.


    Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::CachedData

    public: CachedData
    (
        UE4InputLight & light,
        const void * perDusterVisibility
    )

    Constructor.


    GEO_CONTROLLED_INLINE bool Enlighten::InputLightBase::DistanceFilter

    public: GEO_CONTROLLED_INLINE bool DistanceFilter
    (
        float viewDistance
    ) const

    Return true if this light affects a system at the specified distance from the viewer.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::GetCosCullAngle

    public: GEO_CONTROLLED_INLINEGeo::v128 GetCosCullAngle() const

    Accessors.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::GetCosOuterCone

    public: GEO_CONTROLLED_INLINEGeo::v128 GetCosOuterCone() const

    Accessors.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::GetIntensity

    public: GEO_CONTROLLED_INLINEGeo::v128 GetIntensity() const

    Accessors.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::GetInvCosConeDifference

    public: GEO_CONTROLLED_INLINEGeo::v128 GetInvCosConeDifference() const

    Accessors.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::GetNegativeSinCullAngle

    public: GEO_CONTROLLED_INLINEGeo::v128 GetNegativeSinCullAngle() const

    Accessors.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::GetSqrRadius

    public: GEO_CONTROLLED_INLINEGeo::v128 GetSqrRadius() const

    Accessors.


    void Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::Hash

    public: void Hash
    (
        Helpers::Hasher & hash,
        Geo::u32 clusterVisSize,
        Geo::u32 quadVisSize
    )

    Hash the light data.


    Enlighten::InputLightBase::InputLightBase

    protected: InputLightBase
    (
        eLightType lightType,
        bool hasChanged
    )

    Constructor.


    Enlighten::InputLightBase::InputLightBase

    protected: InputLightBase
    (
        eLightType lightType
    )

    Constructor.


    GEO_CONTROLLED_INLINE bool Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::IsIntersectingCluster

    public: GEO_CONTROLLED_INLINE bool IsIntersectingCluster
    (
        const Geo::v128 & bbMin,
        const Geo::v128 & bbMax,
        const Geo::v128 & minNormalFlipped,
        const Geo::v128 & maxNormalFlipped
    ) const

    Complex light V normalBoundingBox intersection test.


    GEO_CONTROLLED_INLINE bool Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::IsIntersectingClusterGroup

    public: GEO_CONTROLLED_INLINE bool IsIntersectingClusterGroup
    (
        const Geo::v128 & bbMin,
        const Geo::v128 & bbMax,
        const Geo::v128 & minNormalFlipped,
        const Geo::v128 & maxNormalFlipped
    ) const

    Light v ClusterGroup Bounding box intersection test.


    GEO_CONTROLLED_INLINE bool Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::IsIntersectingSystem

    public: GEO_CONTROLLED_INLINE bool IsIntersectingSystem
    (
        const Geo::v128 & bbMin,
        const Geo::v128 & bbMax
    ) const

    Simple Light V system BoundingBox intersection test.


    GEO_CONTROLLED_INLINE void Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::ShadeFourSamples

    public: GEO_CONTROLLED_INLINE void ShadeFourSamples
    (
        const Geo::v128 & positionsX,
        const Geo::v128 & positionsY,
        const Geo::v128 & positionsZ,
        const Geo::v128 & normalsX,
        const Geo::v128 & normalsY,
        const Geo::v128 & normalsZ,
        Geo::u32 sampleIdx,
        Geo::v128 & colourOut0,
        Geo::v128 & colourOut1,
        Geo::v128 & colourOut2,
        Geo::v128 & colourOut3
    ) const

    Shades the given samples.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::ShadeQuad

    public: GEO_CONTROLLED_INLINEGeo::v128 ShadeQuad
    (
        const Geo::v128 & positionsX,
        const Geo::v128 & positionsY,
        const Geo::v128 & positionsZ,
        const Geo::v128 & normalsX,
        const Geo::v128 & normalsY,
        const Geo::v128 & normalsZ,
        Geo::u32 clusterIdx,
        Geo::u32 quadIdx
    ) const

    Shades the given quad.


    GEO_CONTROLLED_INLINE Geo::v128 Enlighten::UE4::UE4InputLight< RadialFalloffModelType >::CachedData::ShadeQuadIntensities

    public: GEO_CONTROLLED_INLINEGeo::v128 ShadeQuadIntensities
    (
        const Geo::v128 & positionsX,
        const Geo::v128 & positionsY,
        const Geo::v128 & positionsZ,
        const Geo::v128 & normalsX,
        const Geo::v128 & normalsY,
        const Geo::v128 & normalsZ,
        const Geo::v128 & visibility
    ) const

    Believe it or not, making this function force-inline is actually a huge perf win.

    , multiple selections available,
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