Froxel volumetric fog: a compute pass scatters the scene lights through a height-falloff medium and applies it to the frame. More...

Public Member Functions
glm::uvec3	froxelGrid () const
	The grid the volume is allocated at: the authored one, bounded.

Public Attributes
float	density = 0.03f
	Base extinction at height.
float	height = 5.0f
	World Y where the medium is densest.
float	heightFalloff = 0.15f
	Density e-folding per world unit above height.
float	anisotropy = 0.7f
	Henyey-Greenstein g, within MAX_ANISOTROPY.
glm::vec3	albedo = {0.8f, 0.85f, 1.0f}
	Scattering tint.
uint32_t	resolutionX = 160
	Screen tiles; higher = sharper shafts.
uint32_t	resolutionY = 90
	Screen tiles.
uint32_t	resolutionZ = 64
	Exponential slices.
float	maxDistance = 200.0f
	How far from the eye the slices reach, in metres.

Static Public Attributes
static constexpr float	MAX_ANISOTROPY = 0.95f
	At +-1 the phase function divides zero by zero.
static constexpr uint32_t	MIN_FROXELS = 16
	Per axis.
static constexpr uint32_t	MAX_FROXELS = 512
	Per axis.
static constexpr uint32_t	MAX_FROXEL_COUNT = 1u << 22
	The most froxels the whole grid holds; a grid over it is scaled down evenly.

Detailed Description

Froxel volumetric fog: a compute pass scatters the scene lights through a height-falloff medium and applies it to the frame.

Member Function Documentation

glm::uvec3 Vkm::Engine::FogSettings::froxelGrid ( ) const

The grid the volume is allocated at: the authored one, bounded.

Each axis clamped, then all scaled evenly to fit MAX_FROXEL_COUNT.

float Vkm::Engine::FogSettings::maxDistance = 200.0f

How far from the eye the slices reach, in metres.

Or the far plane if nearer; a point beyond takes the fog accumulated to here.

uint32_t Vkm::Engine::FogSettings::MAX_FROXEL_COUNT = 1u << 22

staticconstexpr

The most froxels the whole grid holds; a grid over it is scaled down evenly.

Holds the two RGBA16F volumes to 64 MB, against a gigabyte each at 512^3.

The documentation for this struct was generated from the following file: