Raven::IrradiancePass Class Reference

Convolves an environment cubemap into a diffuse irradiance map for IBL. More...

#include <IrradiancePass.h>

Public Member Functions
FRAMEWORK_API void	Init ()
	Allocates the irradiance cubemap, per-face framebuffers, pipeline, and quad geometry.
FRAMEWORK_API void	Shutdown ()
	Releases all GPU resources owned by this pass.
FRAMEWORK_API void	BakeIrradianceMap (Ref< TextureCube > activeCubemap)
	Convolves activeCubemap and writes the result into the internal irradiance map.
Ref< Pipeline >	GetPipeline ()
	Returns the convolution pipeline.
Ref< TextureCube >	GetIrradianceMap ()
	Returns the irradiance cubemap produced by the most recent BakeIrradianceMap call.

Detailed Description

Convolves an environment cubemap into a diffuse irradiance map for IBL.

Renders a fullscreen quad into each of the six faces of a cubemap using a hemisphere-integration convolution shader. The resulting irradiance map is consumed by GeometryPass for the ambient IBL lighting term.

BakeIrradianceMap is called by SceneRenderer whenever the active environment cubemap changes (e.g. when a SkylightComponent assigns a new texture). The bake is synchronous with respect to the GPU frame boundary.

Member Function Documentation

BakeIrradianceMap()

void Raven::IrradiancePass::BakeIrradianceMap

(

Ref< TextureCube >

activeCubemap

)

Convolves activeCubemap and writes the result into the internal irradiance map.

Renders all six cubemap faces. Skips re-baking if the same cubemap is passed consecutively (tracked by the m_IrradianceBaked flag).

Parameters

activeCubemap

Source environment cubemap to convolve.

GetIrradianceMap()

Ref< TextureCube > Raven::IrradiancePass::GetIrradianceMap ( )

inline

Returns the irradiance cubemap produced by the most recent BakeIrradianceMap call.

Returns

Diffuse irradiance cubemap consumed by GeometryPass.

GetPipeline()

Ref< Pipeline > Raven::IrradiancePass::GetPipeline ( )

inline

Returns the convolution pipeline.

Init()

void Raven::IrradiancePass::Init

(

)

Allocates the irradiance cubemap, per-face framebuffers, pipeline, and quad geometry.

Shutdown()

void Raven::IrradiancePass::Shutdown

(

)

Releases all GPU resources owned by this pass.

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

• Framework/src/Framework/Passes/IrradiancePass.h
• Framework/src/Framework/Passes/IrradiancePass.cpp