Method UpdateVisibility

trinity/Eve/Turret/EveTurretSet.cpp:2053–2117

}

void EveTurretSet::UpdateVisibility( const EveUpdateContext& updateContext )
{
	m_parentShLighting = nullptr;

	// check visibility for each single turret and keep MAX on-screen pixel diameter.
	// The pixel diameter is reset in UpdateLOD on next frame - this is to account for
	// multiple views. We need to keep updating turrets as long as they're visible in any
	// view, not just the last one rendered.
	m_visibleCount = 0;

	// display?
	if( !m_display )
	{
		return;
	}
	auto& frustum = updateContext.GetFrustum();

	for( auto& turret : m_singleTurrets )
	{
		// transform bounding sphere into world space to check against frustum
		Vector4 transformedBoundingSphere = m_boundingSphere;
		GetDynamicBounds( turret, &transformedBoundingSphere, nullptr, nullptr );
		BoundingSphereTransform( turret.worldMatrix, transformedBoundingSphere );
		turret.visible = frustum.IsSphereVisible( &transformedBoundingSphere );
		// count visible turrets of this set, mainly for debug purposes
		if( turret.visible )
		{
			// one more visible turret
			++m_visibleCount;
			// how big is it on screen? Attention: we want the max diameter, since we only have one lodlevel per multiple instanced turrets!
			float currentPixelDiameter = frustum.GetPixelSizeAccross( &transformedBoundingSphere );
			if( currentPixelDiameter > m_estimatedPixelDiameter )
			{
				m_estimatedPixelDiameter = currentPixelDiameter;
			}
		}
	}

	if( m_displayEffects && m_firingEffect )
	{
		m_firingEffect->UpdateVisibility( updateContext );
	}

	auto ambientEffect = GetAmbientEffectOrGeneratedEffect();
	if( ambientEffect )
	{
		Tr2Lod currentLod = Tr2Lod::TR2_LOD_HIGH;
		if( m_lodLevel == LOD::LOD_EMPTY )
		{
			currentLod = Tr2Lod::TR2_LOD_LOW;
		}
		else if( m_lodLevel == LOD::LOD_INVALID )
		{
			currentLod = Tr2Lod::TR2_LOD_UNSPECIFIED;
		}

		ambientEffect->UpdateVisibility( updateContext, m_parentData.transform, currentLod );
	}