Method RenderBackgroundPassObjects

trinity/Eve/EveSpaceScene.cpp:2075–2188

-------------------------------------------------------------------------------------- Description: Render all background objects, nebula, stars, planets etc. Returns: boolean indicating whether background distortion is required. --------------------------------------------------------------------------------------

//   boolean indicating whether background distortion is required.
// --------------------------------------------------------------------------------------
bool EveSpaceScene::RenderBackgroundPassObjects( const Tr2TextureAL& depthMap, const Tr2TextureAL& distortionMap, Tr2RenderContext& renderContext, BackgroundRenderingReason reason )
{
	CCP_STATS_ZONE( __FUNCTION__ );

	std::vector<ITr2Renderable*> visible;
	Tr2RenderableSortList transparentObjects;

	bool hasBackgroundDistortionBatches = false;


	// nebula
	if( m_backgroundEffect )
	{

		if( reason == BACKGROUND_RENDER_REFLECTION )
		{
			// multiply the nebula intensity with the reflection multiplier so we can control the reflection intensity
			m_nebulaIntensityVar = m_backgroundReflectionIntensity;
		}

		renderContext.m_esm.ApplyStandardStates( Tr2EffectStateManager::RM_OPAQUE );
		Tr2Renderer::DrawCameraSpaceScreenQuad( renderContext, m_backgroundEffect->GetShaderStateInterface(), m_backgroundEffect );

		if( reason == BACKGROUND_RENDER_REFLECTION )
		{
			// Reset the nebula intensity to the original one
			m_nebulaIntensityVar = m_currentNebulaIntensity;
		}
	}

	// stars
	if( m_starfield )
	{
		m_starfield->GetBatches( m_secondaryBatches[TRIBATCHTYPE_ADDITIVE], 0 );
		RenderBatch( m_secondaryBatches[TRIBATCHTYPE_ADDITIVE],
					 Tr2EffectStateManager::RM_ALPHA_ADDITIVE,
					 renderContext );
	}

	// backgroundobjects
	if( !m_backgroundObjects.empty() )
	{
		for( auto it = m_backgroundObjects.begin(); it != m_backgroundObjects.end(); ++it )
		{
			auto obj = *it;
			obj->UpdateVisibility( m_updateContext, IdentityMatrix() );
			obj->GetRenderables( visible, nullptr );
		}
		if( !visible.empty() )
		{
			GetAllBatchesFromRenderables( visible, transparentObjects, false, m_secondaryBatches );
			PrepareTransparentBatch( transparentObjects, m_secondaryBatches );
			FinalizeBatches( m_secondaryBatches );

			renderContext.m_esm.ApplyStandardStates( Tr2EffectStateManager::RM_DEPTH_ONLY );
			renderContext.RenderBatches( m_secondaryBatches[TRIBATCHTYPE_DEPTH], BlueSharedString( "Depth" ) );

			RenderOpaqueBatches( m_secondaryBatches, renderContext );