This module contains the interfaces/objects used when dealing with the Low Level API.

Classes

Name	Description
Enlighten::InstanceDescMinimal	Minimal description of an instance.
Enlighten::IPrecompBuildParameters	A class containing various parameters and dials for the system level precompute process.
Enlighten::IPrecompCubeMapBuildParameters	Precompute parameters for cube maps.
Enlighten::IPrecompCubeMapCore	A class containing a data block that is used by the run-time to generate cube maps.
Enlighten::IPrecompDepthCubeMap	Handle to the depth cube map data.
Enlighten::IPrecompGeneratedSystems	Result of the the IPrecompute::CreateSystemsByVoxelisation() call.
Enlighten::IPrecompInputCubeMap	A class representing a cube map object which the run-time can generate dynamically.
Enlighten::IPrecompInputGeometry	Handle to the InputGeometry.
Enlighten::IPrecompInputItemDependencies	A collection of item dependencies.
Enlighten::IPrecompInputMesh	The standard precompute mesh input class.
Enlighten::IPrecompInputProbeOctree	Represents a region of 3D space within which sets of probe positions are adaptively generated.
Enlighten::IPrecompInputProbeRegion	Represents a region of 3D space voxelized at various resolutions.
Enlighten::IPrecompInputProbeSet	A class representing a set of sample points for which the run-time can generate spherical harmonic representations of the diffuse light incident on each sample point.
Enlighten::IPrecompInputSystem	Handle to the InputSystem.
Enlighten::IPrecompMeshValidation	An interface containing methods for analyzing meshes.
Enlighten::IPrecompOutputCubeMap	Handle to the precompute output data for cube maps.
Enlighten::IPrecompOutputProbeOctree	An octree of probe positions grouped into probe sets.
Enlighten::IPrecompOutputProbeSet	Handle to the LightTransport data for probesets.
Enlighten::IPrecompPackedGeometry	Handle to the PackedGeometry.
Enlighten::IPrecompPackedInstance	Handle to the PackedInstance.
Enlighten::IPrecompPackedSystem	Class encapsulating the geometry and additional data for a system, light-mapped or otherwise.
Enlighten::IPrecompProbeAtlasMaxima	Maximum values across the entire world, used to determine the resources required at runtime.
Enlighten::IPrecompProbeOctree	A class representing an octree which defines sets of probe positions within a volume.
Enlighten::IPrecompProbeOctreeLayout	The layout of an octree.
Enlighten::IPrecompProbeSetBuildParameters	A class defining parameters for SH sample probe building.
Enlighten::IPrecompProbeSetRadiosity	A class containing a set of data blocks that are used by the run-time to generate SH representations for the related IPrecompInputProbeSet.
Enlighten::IPrecompRadiosityNormalTexture	Handle to the radiosity normal texture.
Enlighten::IPrecompSystemClustering	Handle to the SystemClustering.
Enlighten::IPrecompSystemCompressedLightTransport	Handle to a compressed SystemLightTransport.
Enlighten::IPrecompSystemDependencies	Handle to the SystemDependencies.
Enlighten::IPrecompSystemDuster	Handle to the platform-agnostic input sample points (dusters).
Enlighten::IPrecompSystemLightTransport	Handle to the SystemLightTransport.
Enlighten::IPrecompSystemPreClustering	Handle to the SystemPreClustering.
Enlighten::IPrecompSystemRadiosity	Handle to the SystemRadiosity.
Enlighten::IPrecompSystemsDependencies	Holds IPrecompSystemDependencies for multiple systems.
Enlighten::IPrecompute	The Low Level Enlighten Precompute API.
Enlighten::IPrecompVolumeQuery	A class representing a region of 3D space which can be tested for intersection against an axis-aligned box.
Enlighten::PointProjectionOptions	Projection options for the point projection functionality.
Enlighten::PointProjectionSurface	A surface we can project points onto.
Enlighten::PointProjectionVersion	Description of the point projection of one instance to a set of surfaces.
Enlighten::PppiAtlasMaxima	The maximum number of atlas tiles and probes that may be concurrently allocated for the given combination of probe sets.
Enlighten::PrecompInputFace	A face (triangle) in EnlightenPrecomp input geometry.
Enlighten::PrecompInputInstance	A simple class housing the data required with each stand-alone instance of some geometry.
Enlighten::PrecompInputVertex	A vertex in EnlightenPrecomp input geometry.
Enlighten::PrecompMeshIdentifier	Simple struct to identify an IPrecompInputMesh with the name and GUID of the geom and the index and GUID of the mesh.
Enlighten::PrecompMeshProperties	Properties of input meshes.
Enlighten::PrecompVolumeQueryBox	An example implementation of IPrecompVolumeQuery which defines a region of 3D space as a set of boxes.
Enlighten::SystemDependencies	A list of system dependencies.
Enlighten::SystemGrouping	A groupings of instances into systems.
Geo::IdentVertLinkBuilder	A utility for identifying pairs of "identical" vertices in a vertex buffer.
Geo::IdxLink	A link between two vertices.
Geo::TriGroupSelection	Utility for doing vertex-based chart identification.

Functions

Name	Description
CalculateUvScaleAndWorldOutputPixelSize(float, const Geo::Matrix &, bool, float, Geo::s32 &, float &)	Utility to calculate the correct UV scaling and world-space output pixel size for a given instance of a given geometry.
ComputePppiAtlasMaxima(Geo::u32, const PrecompOctreeCode , const PppiAtlasFootprint )	Return the maximum number of atlas tiles and probes that may be concurrently allocated for the given combination of probe sets.
ConvertInputSystemToIPrecompGeneratedSystem(Enlighten::IPrecompInputSystem , const IPrecompInputGeometry const , Geo::s32, Enlighten::IPrecompGeneratedSystems &)	Create an IPrecompGeneratedSystems object from inputSystem.
CreateDebugEnvironmentClustering(Geo::s32)	Creates a debug IClusteringOutput interface representing the clustering of an environment at the given resolution.
CreatePrecompute()	Create an instance of the Precompute.
CreateTriGroupsForPrecompInputMesh(const IPrecompInputMesh *)	Utility to create the tri group structure defined by the input mesh.
EstimateSystemDependencies(const Enlighten::InstanceDescMinimal< IPrecompInputGeometry > , Geo::s32, const Enlighten::SystemGrouping , Enlighten::SystemDependencies *&)	Estimate the dependencies between a set of systems.
EstimateSystemDependencies(const Enlighten::InstanceDescMinimal< IPrecompPackedGeometry > , Geo::s32, const Enlighten::SystemGrouping , Enlighten::SystemDependencies *&)	Estimate the dependencies between a set of systems.
GetOctreeCodeWorldPositionAndSize(PrecompOctreeCode, float)	Return the world space position (xyz) and size (w) of the octree block identified by the specified octree code with the specified voxel size.
IsClosedMesh(Geo::StridedArrayView< PrecompIndex3 >)	Return true if the mesh is closed.
RepairHoles(Geo::StridedArrayView< PrecompIndex3 >)	Return the faces which must be added to the mesh to repair holes.
StoreTemporaryScaleAndTranslation(Enlighten::PrecompOutputInstance *, Geo::s32, Geo::s32)	Utility to temporarily pack scale and translation into the PrecompOutputInstance object.

Enums

Name	Description
eAutoSimpMode	The UV auto generation / simplification mode for a mesh.
eMeshClassificationLightingType	Enumeration for reporting results of the first step of Mesh Classification (lightmap-lit or probe-lit).
ePrecompCubeMapQuality	Quality levels for the raytracing in the cube map precompute.
ePrecompQuality	Quality levels for majority of raytracing in the precompute, except cube maps.
GeometryBuildResult	Enumeration for reporting geometry build success/fail.
ProbeOctreeResolution	The resolution at which probes should be placed.
VolumeQueryResult	The result of a volume query.

Typedefs

Name	Description
Geo::GeoPair< Geo::GeoGuid, Geo::u32 > MaterialGuidMapping	A mapping between a material GUID and a 32-bit material ID.
Geo::FixedSizeArray< Geo::s32, 3 > PrecompIndex3	An array of three indices.
Geo::u64 PrecompOctreeCode	Identifies a block within the octree.

Variables

Name	Description
const float g_DependencyVisibilityThresholdDefault = 1.f / (1 << 8)	By default, do not consider a system as a dependency if its visibility is smaller than this threshold.

void GEO_CALL Enlighten::CalculateUvScaleAndWorldOutputPixelSize

public: void GEO_CALL CalculateUvScaleAndWorldOutputPixelSize
(
float geomOutputPixelSize,
const Geo::Matrix & instanceTransform,
bool scaleUvsWithInstanceSize,
float instanceAdditionalUvScale,
Geo::s32 & outUvScale,
float & outWorldOutputPixelSize
)

Utility to calculate the correct UV scaling and world-space output pixel size for a given instance of a given geometry.

This depends on the instance transform, the "ScaleUvsWithInstanceSize" flag on the instance, the "AdditionalUvScale" value on the instance and the output pixel size on the geom.

Parameters

[in]	geomOutputPixelSize	The unscaled pixel size
[in]	instanceTransform	The transform matrix for the instance
[in]	scaleUvsWithInstanceSize	Should the scaling of the transform of the instance be taken into account when generating the per-instance lightmap UVs (i.e. should the output pixel size specified for this instance be in world units (true) or in local geometry units (false))
[in]	instanceAdditionalUvScale	Specifies an additional scale that should be applied to the lightmap UVs for the geometry instance instance (to change the output pixel size). This is applied in addition to any scaling related to the ScaleUvsWithInstanceSize flag.
[out]	outUvScale	The UV scale for that instance
[out]	outWorldOutputPixelSize	The pixel size after instance UV scaling is applied

PppiAtlasMaxima GEO_CALL Enlighten::ComputePppiAtlasMaxima

public: PppiAtlasMaxima GEO_CALL ComputePppiAtlasMaxima
(
Geo::u32 probeSetCount,
const PrecompOctreeCode * octreeCodes,
const PppiAtlasFootprint * footprints
)

Return the maximum number of atlas tiles and probes that may be concurrently allocated for the given combination of probe sets.

Parameters

[in]	probeSetCount	The number of probe sets in the world.
[in]	octreeCodes	The octree code associated with each probe set.
[in]	footprints	The result of GetOctreePppiAtlasFootprint for each probe set.

Geo::s32 GEO_CALL Enlighten::ConvertInputSystemToIPrecompGeneratedSystem

public: Geo::s32GEO_CALL ConvertInputSystemToIPrecompGeneratedSystem
(
Enlighten::IPrecompInputSystem * inputSystem,
const IPrecompInputGeometry *const * pInputGeoms,
Geo::s32 numGeoms,
Enlighten::IPrecompGeneratedSystems *& generatedSystem
)

Create an IPrecompGeneratedSystems object from inputSystem.

The generatedSystem object will have only one system in it (inputSystem) Note that the output object (generatedSystem) owns the input system, e.g. inputSystem will be destroyed when generatedSystem is destroyed.

Parameters

[in]	inputSystem	InputSystem to be converted to PrecompGeneratedSystem
[in]	pInputGeoms	array of geoms referenced by inputsystem
[in]	numGeoms	num of geoms in pInputGeoms
[out]	generatedSystem	IPrecompGeneratedSystems with one system in it.

Returns

0 if successful, otherwise a non-zero value.

Enlighten::IClusteringOutput* GEO_CALL Enlighten::CreateDebugEnvironmentClustering

public: Enlighten::IClusteringOutput *GEO_CALL CreateDebugEnvironmentClustering
(
Geo::s32 environmentResolution
)

Creates a debug IClusteringOutput interface representing the clustering of an environment at the given resolution.

IPrecompute* Enlighten::CreatePrecompute

public: IPrecompute * CreatePrecompute()

Create an instance of the Precompute.

Geo::TriGroupSelection* GEO_CALL Enlighten::CreateTriGroupsForPrecompInputMesh

public: Geo::TriGroupSelection *GEO_CALL CreateTriGroupsForPrecompInputMesh
(
const IPrecompInputMesh * inputMesh
)

Utility to create the tri group structure defined by the input mesh.

This can be used to generate the same tri groups the precompute will generate when given this mesh. The tri groups are determined by the connectivity in the index buffer (ie. shared vertices) and the links (Geo::IdxLink) specified or generated by the user.

Parameters

[in]

inputMesh

The input mesh.

The resulting structure should be released by the caller.

Returns

A valid tri group if successful, else null.

Geo::s32 GEO_CALL Enlighten::EstimateSystemDependencies

public: Geo::s32GEO_CALL EstimateSystemDependencies
(
const Enlighten::InstanceDescMinimal< IPrecompInputGeometry > * instances,
Geo::s32 numInstances,
const Enlighten::SystemGrouping * iSystemGrouping,
Enlighten::SystemDependencies *& oSystemDependencies
)

Estimate the dependencies between a set of systems.

Uses the instance bounding boxes to determine the system bounding boxes, and a collection of bounding box/sphere intersection tests to determine the dependencies. The function can be given either IPrecompInputGeometry or IPrecompPackedGeometry. Results will be identical.

Parameters

[in]	instances	The instances in the systems.
[in]	numInstances	The number of instances.
[in]	iSystemGrouping	A list of system groups. Each group contains indices into the input array of instances.
[out]	oSystemDependencies	The system dependencies.

Returns

0 if successful, otherwise a non-zero value.

Geo::s32 GEO_CALL Enlighten::EstimateSystemDependencies

public: Geo::s32GEO_CALL EstimateSystemDependencies
(
const Enlighten::InstanceDescMinimal< IPrecompPackedGeometry > * instances,
Geo::s32 numInstances,
const Enlighten::SystemGrouping * iSystemGrouping,
Enlighten::SystemDependencies *& oSystemDependencies
)

Estimate the dependencies between a set of systems.

Uses the instance bounding boxes to determine the system bounding boxes, and a collection of bounding box/sphere intersection tests to determine the dependencies. The function can be given either IPrecompInputGeometry or IPrecompPackedGeometry. Results will be identical.

Parameters

[in]	instances	The instances in the systems.
[in]	numInstances	The number of instances.
[in]	iSystemGrouping	A list of system groups. Each group contains indices into the input array of instances.
[out]	oSystemDependencies	The system dependencies.

Returns

0 if successful, otherwise a non-zero value.

Geo::v128 GEO_CALL Enlighten::GetOctreeCodeWorldPositionAndSize

public: Geo::v128GEO_CALL GetOctreeCodeWorldPositionAndSize
(
PrecompOctreeCode octreeCode,
float voxelSize
)

Return the world space position (xyz) and size (w) of the octree block identified by the specified octree code with the specified voxel size.

bool Enlighten::IsClosedMesh

public: bool IsClosedMesh
(
Geo::StridedArrayView< PrecompIndex3 > faces
)

Return true if the mesh is closed.

Geo::GeoArray<PrecompIndex3> Enlighten::RepairHoles

public: Geo::GeoArray< PrecompIndex3 > RepairHoles
(
Geo::StridedArrayView< PrecompIndex3 > faces
)

Return the faces which must be added to the mesh to repair holes.

Each hole is filled with a triangle fan. The mesh cannot be repaired if any two holes share a common vertex.

void GEO_CALL Enlighten::StoreTemporaryScaleAndTranslation

public: void GEO_CALL StoreTemporaryScaleAndTranslation
(
Enlighten::PrecompOutputInstance * outputInstance,
Geo::s32 uvScale,
Geo::s32 precompBlockSize
)

Utility to temporarily pack scale and translation into the PrecompOutputInstance object.

This later gets overridden

Parameters

[in]	outputInstance	The output instance
[in]	uvScale	The UV scaling to apply to the instance chart
[in]	precompBlockSize	The block size used when testing charts in the packing

eAutoSimpMode

public: enum eAutoSimpMode
{
ASM_NONE = 0,
ASM_SIMPLIFY_NO_UVS,
ASM_SIMPLIFY_USING_UVS,
NUM_AUTO_SIMP_MODES
}

The UV auto generation / simplification mode for a mesh.

Used as part of PrecompMeshProperties.

enumerators

ASM_NONE	Switch AutoUV generation off.
ASM_SIMPLIFY_NO_UVS	Switch AutoUV generation on and use auto generated UVs for all charts.
ASM_SIMPLIFY_USING_UVS	Switch AutoUV generation on, use auto UV generated UVs only if they are better than the input UVs.
NUM_AUTO_SIMP_MODES

eMeshClassificationLightingType

public: enum eMeshClassificationLightingType
{
MCLT_LIGHTMAP,
MCLT_PROBE
}

Enumeration for reporting results of the first step of Mesh Classification (lightmap-lit or probe-lit).

enumerators

MCLT_LIGHTMAP
MCLT_PROBE

ePrecompCubeMapQuality

public: enum ePrecompCubeMapQuality
{
PCMQ_LOW = 1,
PCMQ_MEDIUM = 4,
PCMQ_HIGH = 16,
PCMQ_VERY_HIGH = 64
}

Quality levels for the raytracing in the cube map precompute.

Each levels correspond to a number of rays that get generated and cast per pixel.

See Also

ePrecompQuality

enumerators

PCMQ_LOW
PCMQ_MEDIUM	The default.
PCMQ_HIGH
PCMQ_VERY_HIGH

ePrecompQuality

public: enum ePrecompQuality
{
PCQ_DEBUG = 16,
PCQ_DRAFT = 512,
PCQ_LOW = 2048,
PCQ_MEDIUM = 8192,
PCQ_HIGH = 32768,
PCQ_VERY_HIGH = 131072
}

Quality levels for majority of raytracing in the precompute, except cube maps.

Each levels correspond to a number of rays that get generated and than cast over the sphere and/or hemisphere. More rays result in a better approximation and therefore higher quality.

See Also

ePrecompCubeMapQuality

enumerators

PCQ_DEBUG
PCQ_DRAFT
PCQ_LOW
PCQ_MEDIUM
PCQ_HIGH
PCQ_VERY_HIGH

GeometryBuildResult

public: enum GeometryBuildResult
{
GEOM_BUILD_SUCCESS = 0,
GEOM_BUILD_INVALID_MESH_INPUT = -1,
GEOM_BUILD_INVALID_MESH_PROPERTIES = -2,
GEOM_BUILD_PRECOMPUTE_FAILURE = -3,
GEOM_BUILD_EMPTY = -4,
GEOM_BUILD_USER_CANCELLED = -5,
GEOM_BUILD_INVALID_TERRAIN = -6,
GEOM_BUILD_INVALID_GEOM_PROPERTIES = -7
}

Enumeration for reporting geometry build success/fail.

enumerators

GEOM_BUILD_SUCCESS	The geometry was built successfully.
GEOM_BUILD_INVALID_MESH_INPUT	A mesh failed validation, or the geometry's output pixel size or atlas width/height was invalid.
GEOM_BUILD_INVALID_MESH_PROPERTIES	The flags and/or parameters of a mesh were invalid, or the geometry contained no input mesh or no output mesh.
GEOM_BUILD_PRECOMPUTE_FAILURE	An internal precompute error occurred. Contact Enlighten support.
GEOM_BUILD_EMPTY	The geometry contained no meshes.
GEOM_BUILD_USER_CANCELLED	The user cancelled the geometry build.
GEOM_BUILD_INVALID_TERRAIN	Geometry is marked up as terrain, but has invalid terrain properties.
GEOM_BUILD_INVALID_GEOM_PROPERTIES	Geometry has invalid properties.

ProbeOctreeResolution

public: enum ProbeOctreeResolution
{
PROBEOCTREERESOLUTION_FULL,
PROBEOCTREERESOLUTION_HALF,
PROBEOCTREERESOLUTION_QUARTER,
PROBEOCTREERESOLUTION_EIGHTH,
PROBEOCTREERESOLUTION_SIXTEENTH,
PROBEOCTREERESOLUTION_1_IN_32,
PROBEOCTREERESOLUTION_1_IN_64,
PROBEOCTREERESOLUTION_1_IN_128,
PROBEOCTREERESOLUTION_1_IN_256,
PROBEOCTREERESOLUTIONCOUNT,
PROBEOCTREERESOLUTION_NONE = PROBEOCTREERESOLUTIONCOUNT
}

The resolution at which probes should be placed.

enumerators

PROBEOCTREERESOLUTION_FULL
PROBEOCTREERESOLUTION_HALF
PROBEOCTREERESOLUTION_QUARTER
PROBEOCTREERESOLUTION_EIGHTH
PROBEOCTREERESOLUTION_SIXTEENTH
PROBEOCTREERESOLUTION_1_IN_32
PROBEOCTREERESOLUTION_1_IN_64
PROBEOCTREERESOLUTION_1_IN_128
PROBEOCTREERESOLUTION_1_IN_256
PROBEOCTREERESOLUTIONCOUNT
PROBEOCTREERESOLUTION_NONE

VolumeQueryResult

public: enum VolumeQueryResult
{
VOLUMEQUERYESULT_OUTSIDE,
VOLUMEQUERYESULT_PARTIAL,
VOLUMEQUERYESULT_INSIDE
}

The result of a volume query.

enumerators

VOLUMEQUERYESULT_OUTSIDE	Completely outside.
VOLUMEQUERYESULT_PARTIAL	Partly inside.
VOLUMEQUERYESULT_INSIDE	Completely inside.

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