The PbrMediumStack class Contains all the mediums being used for one ray path, the last medium in the stack is the one that must be used to compute the transmittance for the current sample. More...

Public Member Functions
void	push (const GMathVec3f &attenuation, const GMathVec3f &scattering_color, const float &scattering_anisotropy, ModuleMaterial material, const ModuleSceneObject scene_object)
	Push a medium in the stack with his attenuation factor.

void	pop (ModuleMaterial *material)
	Pop the last medium in the stack.

bool	is_empty () const
	True when there is no medium in the stack.

void	clear ()
	Clear the medium stack.

bool	update_stack (const CtxEval &eval_ctx, const CtxShader &shader_ctx, const PbrMaterial pbr_material, const CtxFragment old_fragment)
	update_stack Push or Pop a medium depending if the bxdf has attenuation or scattering and if the fragment is facing

GMathVec3f	evaluate_transmittance (const double distance) const
	evaluate_transmittance Compute the transmittance of the last medium in the stack using the distance

const GMathVec3f &	get_attenuation () const

const GMathVec3f &	get_scattering_color () const

const float &	get_scattering_anisotropy () const

const unsigned int &	get_count () const

ModuleMaterial *	get_material () const

const ModuleSceneObject *	get_scene_object () const

const PbrMedium	get_medium (const unsigned medium_id) const

Detailed Description

The PbrMediumStack class Contains all the mediums being used for one ray path, the last medium in the stack is the one that must be used to compute the transmittance for the current sample.

Push a Medium when the sample is BACK_DOMAIN and the fragment is facing; Pop a Medium when the sample is BACK_DOMAIN and the fragment is not facing, we pop the medium corresponding at the pushed medium

| | | | | | –>push pop—>push->push->pop->pop–> |-—| | |-—| | |-------------—|

Member Function Documentation

GMathVec3f PbrMediumStack::evaluate_transmittance ( const double distance ) const

evaluate_transmittance Compute the transmittance of the last medium in the stack using the distance

Parameters

distance is the distance travelled by the ray in the medium

Returns: the transmittance

bool PbrMediumStack::update_stack	(	const CtxEval &	eval_ctx,
		const CtxShader &	shader_ctx,
		const PbrMaterial *	pbr_material,
		const CtxFragment *	old_fragment
	)

update_stack Push or Pop a medium depending if the bxdf has attenuation or scattering and if the fragment is facing

Returns: true if there is attenuation or scattering on the bxdf

Public Member Functions

Detailed Description

Member Function Documentation