Method UpdateFogSettings

trinity/Tr2VolumetricsRenderer.cpp:342–398

}

void Tr2VolumetricsRenderer::UpdateFogSettings( const EveComponentRegistry& registry, const EveUpdateContext& updateContext )
{
	std::vector<ITr2FroxelFogSettings::FroxelFogSettings*> overrides;
	double logBlendingSmoothness = m_logBlendingSmoothness;

	registry.ProcessComponents<ITr2FroxelFogSettings>( [&overrides, logBlendingSmoothness]( ITr2FroxelFogSettings* component ) -> void {
		ITr2FroxelFogSettings::FroxelFogSettings* fogSettings = component->GetFroxelFogSettings();

		//Compute log(1 + thickness * m_logBlendingSmoothness) for each fog
		fogSettings->logThickness.value = log1p( (double)fogSettings->thickness.value * logBlendingSmoothness );
		fogSettings->logThickness.enabled = fogSettings->thickness.enabled;

		overrides.push_back( fogSettings );
	} );
	sort( begin( overrides ), end( overrides ), []( const auto& a, const auto& b ) {
		return a->priority > b->priority;
	} );

	//m_froxelFogSettings = OldPriorityBlend( overrides );

	//std::vector<ITr2FroxelFogSettings::FroxelFogSettings*> test;

#define FROXEL_ACCUMULATE( setting ) m_froxelFogSettings.setting = PriorityBlend::Accumulate( &ITr2FroxelFogSettings::FroxelFogSettings::setting, overrides )

	FROXEL_ACCUMULATE( thickness );

	FROXEL_ACCUMULATE( lightDirectionality );

	FROXEL_ACCUMULATE( environmentIntensity );
	FROXEL_ACCUMULATE( environmentDirectionality );

	FROXEL_ACCUMULATE( fogColor );
	FROXEL_ACCUMULATE( backgroundVisibility );

	FROXEL_ACCUMULATE( godRayNoiseIntensity );
	FROXEL_ACCUMULATE( godRayNoiseFrequency );
	FROXEL_ACCUMULATE( godRayNoiseAnimationSpeed );

	FROXEL_ACCUMULATE( fogNoiseIntensity );
	FROXEL_ACCUMULATE( fogNoiseFrequency );
	FROXEL_ACCUMULATE( fogNoiseMovementSpeed );

	if( m_logBlending )
	{
		//Replace the thickness with a logarithmically interpolated one, making the transition from 0 thickness more graceful.
		FROXEL_ACCUMULATE( logThickness );
		m_froxelFogSettings.thickness = (float)( expm1( m_froxelFogSettings.logThickness.value ) / logBlendingSmoothness );
	}

	float delta = updateContext.GetDeltaT();

	m_godRayNoiseAnimation += m_froxelFogSettings.godRayNoiseAnimationSpeed.value * ( delta / m_froxel3DNoise->GetDepth() );
	m_godRayNoiseAnimation -= floor( m_godRayNoiseAnimation );

	float fogFrequency = exp2f( -m_froxelFogSettings.fogNoiseFrequency.value );
	m_fogNoiseMovement += m_froxelFogSettings.fogNoiseMovementSpeed.value * delta;
}