oe::render::Pbr Class Reference

Physically Based Rendering. More...

#include <OxygenEngine/render/pbr.h>

Public Member Functions
std::shared_ptr< Texture >	getBRDFLut () const
	Returns the BRDF integration lookup texture.
std::pair< std::shared_ptr< Texture >, std::shared_ptr< Texture > >	getLTCTextures () const
	Returns lookup textures needed to store Linearly Transformed Cosines values to make area lights.
std::shared_ptr< Cubemap >	generateIrradianceCubemap (Cubemap *source)
	Generate irradiance cubemap from a source cubemap irradiance cubemap simulate the diffuse part / ambient lighting of the scene.
std::shared_ptr< Cubemap >	generateSpecularCubemap (Cubemap *source, const uint32_t size=256)
	Generate specular cubemap from a cubemap.

Detailed Description

Physically Based Rendering.

Todo:

Lights (point, area) tutorial

Member Function Documentation

generateIrradianceCubemap()

std::shared_ptr< Cubemap > oe::render::Pbr::generateIrradianceCubemap

(

Cubemap *

source

)

Generate irradiance cubemap from a source cubemap irradiance cubemap simulate the diffuse part / ambient lighting of the scene.

Parameters

source

Source cubemap

Returns

Irradiance cubemap

generateSpecularCubemap()

std::shared_ptr< Cubemap > oe::render::Pbr::generateSpecularCubemap	(	Cubemap *	source,
		const uint32_t	size = 256
	)

Generate specular cubemap from a cubemap.

Specular cubemap simulates realistic reflections by storing varying roughness levels in mipmaps

Parameters

source	Source cubemap
size	Size of the final cubemap (higher values gives better reflections quality, but slower to compute)

Returns

Specular cubemap

getBRDFLut()

std::shared_ptr< Texture > oe::render::Pbr::getBRDFLut

(

)

const

Returns the BRDF integration lookup texture.

This texture stores the BRDF values {Red=scale, Green=bias} according to {X=angle between light and normal, Y=roughness}

Returns

Precomputed BRDF LUT

getLTCTextures()

std::pair< std::shared_ptr< Texture >, std::shared_ptr< Texture > > oe::render::Pbr::getLTCTextures

(

)

const

Returns lookup textures needed to store Linearly Transformed Cosines values to make area lights.

Returns

First LUT contains LTC matrix elements and second contains GGX/fresnel multipliers

See also

The original Pa­per on Eric Heitz’s Re­search Page for a de­tailed ex­plan­a­tion about LTC.

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

• OxygenEngine/render/pbr.h