glsl::DDGIVolume_glsl Class Reference

Shader program. More...

Classes
struct	DDGIVolume

Public Member Functions
ivec3	baseGridCoord (in DDGIVolume ddgiVolume, Point3 X)
int	baseProbeIndex (in DDGIVolume ddgiVolume, Point3 X)
	Returns the index of the probe at the floor along each dimension. More...
float	distanceSquared (Point2 v0, Point2 v1)
Color3	gridCoordToColor (ivec3 gridCoord)
	Matches code in LightFieldModel::debugDraw() More...
Point3	gridCoordToPosition (in DDGIVolume L, ivec3 c)
Point3	gridCoordToPositionNoOffset (in DDGIVolume L, ivec3 c)
int	gridCoordToProbeIndex (in DDGIVolume ddgiVolume, in Point3 probeCoords)
	More...
int	idot (ivec3 a, ivec3 b)
	GLSL's dot on ivec3 returns a float. More...
int	nearestProbeIndex (in DDGIVolume L, Point3 X, out Point3 probeCoords)
	probeCoords Coordinates of the probe, computed as part of the process. More...
Color3	probeIndexToColor (in DDGIVolume L, int index)
ivec3	probeIndexToGridCoord (in DDGIVolume L, int index)
Point3	probeLocation (in DDGIVolume L, int index)
Point2	probeTextureCoordFromDirection (Vector3 dir, ivec3 probeGridCoord, const in bool useIrradiance, DDGIVolume ddgiVolume)
Vector4	readProbeOffset (in DDGIVolume L, ivec2 texelCoord)
int	relativeProbeIndex (in DDGIVolume ddgiVolume, int baseProbeIndex, int relativeIndex)
Color4	sampleOneDDGIVolume (DDGIVolume ddgiVolume, Point3 wsPosition, Vector3 offsetPos, Vector3 sampleDirection, Point3 cameraPos, bool skippable)
	Result.rgb = Irradiance3 Result.a = weight based on wsPosition vs. More...
void	writeProbeOffset (in DDGIVolume L, in ivec2 texelCoord, in vec4 offsetAndFlags)

Public Attributes
const float	highestSignedValue = float(1 << ( - 1))

Detailed Description

Shader program.

Member Function Documentation

baseGridCoord()

ivec3 glsl::DDGIVolume_glsl::baseGridCoord ( in DDGIVolume  ddgiVolume, Point3  X  )

inline

baseProbeIndex()

int glsl::DDGIVolume_glsl::baseProbeIndex ( in DDGIVolume  ddgiVolume, Point3  X  )

inline

Returns the index of the probe at the floor along each dimension.

distanceSquared()

float glsl::DDGIVolume_glsl::distanceSquared ( Point2  v0, Point2  v1  )

inline

gridCoordToColor()

Color3 glsl::DDGIVolume_glsl::gridCoordToColor ( ivec3  gridCoord )

inline

Matches code in LightFieldModel::debugDraw()

gridCoordToPosition()

Point3 glsl::DDGIVolume_glsl::gridCoordToPosition ( in DDGIVolume  L, ivec3  c  )

inline

gridCoordToPositionNoOffset()

Point3 glsl::DDGIVolume_glsl::gridCoordToPositionNoOffset ( in DDGIVolume  L, ivec3  c  )

inline

gridCoordToProbeIndex()

int glsl::DDGIVolume_glsl::gridCoordToProbeIndex ( in DDGIVolume  ddgiVolume, in Point3  probeCoords  )

inline

Parameters

probeCoords

Integer (stored in float) coordinates of the probe on the probe grid

idot()

int glsl::DDGIVolume_glsl::idot ( ivec3  a, ivec3  b  )

inline

GLSL's dot on ivec3 returns a float.

This is an all-integer version

nearestProbeIndex()

int glsl::DDGIVolume_glsl::nearestProbeIndex ( in DDGIVolume  L, Point3  X, out Point3  probeCoords  )

inline

probeCoords Coordinates of the probe, computed as part of the process.

probeIndexToColor()

Color3 glsl::DDGIVolume_glsl::probeIndexToColor ( in DDGIVolume  L, int  index  )

inline

probeIndexToGridCoord()

ivec3 glsl::DDGIVolume_glsl::probeIndexToGridCoord ( in DDGIVolume  L, int  index  )

inline

probeLocation()

Point3 glsl::DDGIVolume_glsl::probeLocation ( in DDGIVolume  L, int  index  )

inline

probeTextureCoordFromDirection()

Point2 glsl::DDGIVolume_glsl::probeTextureCoordFromDirection ( Vector3  dir, ivec3  probeGridCoord, const in bool  useIrradiance, DDGIVolume  ddgiVolume  )

inline

readProbeOffset()

Vector4 glsl::DDGIVolume_glsl::readProbeOffset ( in DDGIVolume  L, ivec2  texelCoord  )

inline

relativeProbeIndex()

int glsl::DDGIVolume_glsl::relativeProbeIndex ( in DDGIVolume  ddgiVolume, int  baseProbeIndex, int  relativeIndex  )

inline

Parameters

baseProbeIndex	Index into L.radianceProbeGrid's TEXTURE_2D_ARRAY. This is the probe at the floor of the current ray sampling position.
relativeIndex	on [0, 7]. This is used as a set of three 1-bit offsets

Returns a probe index into L.radianceProbeGrid. It may be the same index as baseProbeIndex.

This will wrap in crazy ways when the camera is outside of the bounding box of the probes...but that's ok. If that case arises, then the trace is likely to be poor quality anyway. Regardless, this function will still return the index of some valid probe, and that probe can either be used or fail because it does not have visibility to the location desired.

See also

nextCycleIndex, baseProbeIndex

sampleOneDDGIVolume()

Color4 glsl::DDGIVolume_glsl::sampleOneDDGIVolume ( DDGIVolume  ddgiVolume, Point3  wsPosition, Vector3  offsetPos, Vector3  sampleDirection, Point3  cameraPos, bool  skippable  )

inline

Result.rgb = Irradiance3 Result.a = weight based on wsPosition vs.

probe bounds

writeProbeOffset()

void glsl::DDGIVolume_glsl::writeProbeOffset ( in DDGIVolume  L, in ivec2  texelCoord, in vec4  offsetAndFlags  )

inline

Member Data Documentation

highestSignedValue

const float glsl::DDGIVolume_glsl::highestSignedValue = float(1 << ( - 1))