GPUShaders::Common::Atmosphere Class Reference

Atmosphere general shader. More...

Classes
struct	AtmosphereParameters

Public Member Functions
float	rayleighPhase (float cosAngle)
float	miePhase (float cosAngle, float gMie)
vec3	computeAtmosphereRadiance (vec3 rayOrigin, vec3 rayDir, vec3 sunDir, texture2D scatterTable, AtmosphereParameters params)

Public Attributes
AtmosphereParameters	defaultAtmosphere = AtmosphereParameters(vec3(1.474, 1.8504, 1.91198), vec3(5.5e-6, 13.0e-6, 22.4e-6), 6371e3, 6471e3, 20.0, 21e-6, 8000.0, 1200.0, 0.758, 0.04675, 0.998)

Detailed Description

Atmosphere general shader.

See also

GPUShaders::Common::Constants, GPUShaders::Common::Geometry, GPUShaders::Common::Samplers

Member Function Documentation

computeAtmosphereRadiance()

vec3 GPUShaders::Common::Atmosphere::computeAtmosphereRadiance ( vec3  rayOrigin, vec3  rayDir, vec3  sunDir, texture2D  scatterTable, AtmosphereParameters  params  )

inline

Compute the radiance for a given ray, based on the atmosphere scattering model.

Parameters

rayOrigin	the ray origin in ground space
rayDir	the ray direction
sunDir	the light direction
scatterTable	the precomputed secondary scattering lookup table
params	atmosphere physics parameters

Returns

the estimated radiance

miePhase()

float GPUShaders::Common::Atmosphere::miePhase ( float  cosAngle, float  gMie  )

inline

Compute the Mie phase.

Parameters

cosAngle	Cosine of the angle between the ray and the light directions
gMie	the Mie atmosphere parameter

Returns

the phase

rayleighPhase()

float GPUShaders::Common::Atmosphere::rayleighPhase ( float  cosAngle )

inline

Compute the Rayleigh phase.

Parameters

cosAngle

Cosine of the angle between the ray and the light directions

Returns

the phase

Member Data Documentation

defaultAtmosphere

AtmosphereParameters GPUShaders::Common::Atmosphere::defaultAtmosphere = AtmosphereParameters(vec3(1.474, 1.8504, 1.91198), vec3(5.5e-6, 13.0e-6, 22.4e-6), 6371e3, 6471e3, 20.0, 21e-6, 8000.0, 1200.0, 0.758, 0.04675, 0.998)

Default atmosphere parameters.

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

• resources/common/shaders/background/atmosphere.glsl