Method RenderShadowMapForSpotLight

trinity/Eve/EveSpaceScene.cpp:2487–2554

}

void EveSpaceScene::RenderShadowMapForSpotLight(
	Tr2RenderContext& renderContext,
	const std::vector<IEveShadowCaster*>& shadowCasters,
	uint32_t shadowMapScale,
	uint32_t shadowMapOffsetX,
	uint32_t shadowMapOffsetY,
	const Vector3& lightPosition,
	const Matrix& view,
	const Matrix& projection,
	const Tr2TextureAL& shadowMap )
{
	CCP_STATS_ZONE( __FUNCTION__ );

	renderContext.m_esm.PushViewport();
	renderContext.m_esm.UpdateRenderTargetViewport( shadowMap.GetWidth(), shadowMap.GetHeight() );
	renderContext.m_esm.SetViewport( shadowMapScale, shadowMapScale, shadowMapOffsetX, shadowMapOffsetY, 0, 1 );

	const float margin = 16.f;
	const float marginScale = 1.f - ( margin / shadowMapScale );
	const Matrix marginMatrix = ScalingMatrix( Vector3( marginScale, marginScale, 1.f ) );
	const Matrix viewProj = view * projection * marginMatrix;

	TriFrustum shadowFrustum;
	shadowFrustum.DeriveFrustum( &view, &lightPosition, &projection, renderContext.m_esm.GetViewport() );
	{
		CCP_STATS_ZONE( "get shadowbatches for light" );
		float sizeInShadow = 0.0f;
		for( auto& caster : shadowCasters )
		{
			caster->IsCastingShadow( m_updateContext.GetFrustum(), TriShadowFrustum( shadowFrustum ), TR2RENDERREASON_NORMAL, sizeInShadow );
			// special threshold check
			if( sizeInShadow > 5.0f )
			{
				auto perObjData = caster->GetShadowPerObjectData( m_shadowBatches[0].get() );
				caster->GetShadowBatches( m_shadowBatches[0].get(), perObjData, min( (float)shadowMapScale, sizeInShadow ) );
			}
		}

		m_instancedMeshManager->GetShadowBatches( m_updateContext.GetFrustum(), TriShadowFrustum( shadowFrustum ), m_updateContext.GetInvLodFactor(), { { TRIBATCHTYPE_OPAQUE, *m_shadowBatches[0] } } );
	}

	m_shadowBatches[0]->Finalize();
	PerFrameVSData data;
	data.ViewProjectionMat = Transpose( viewProj );

	static const unsigned perFrameVsMask =
		( 1 << VERTEX_SHADER ) |
		SHADER_TYPE_EXISTS( COMPUTE_SHADER ) |
		SHADER_TYPE_EXISTS( GEOMETRY_SHADER ) |
		SHADER_TYPE_EXISTS( HULL_SHADER ) |
		SHADER_TYPE_EXISTS( DOMAIN_SHADER );
	FillAndSetConstants( m_shadowPerFrameVSBuffer, &data, sizeof( data ), perFrameVsMask, Tr2Renderer::GetPerFrameVSStartRegister(), renderContext );

	if( m_shadowBatches[0]->GetBatchCount() )
	{
		if( !renderContext.m_esm.IsDepthTestInverted() )
		{
			renderContext.m_esm.SetInvertedDepthTest( true );