Method UpdatePointSpotShadowMaps

SDK/src/NDK/Systems/RenderSystem.cpp:320–412

	*/

	void RenderSystem::UpdatePointSpotShadowMaps()
	{
		if (!m_shadowRT.IsValid())
			m_shadowRT.Create();

		Nz::SceneData dummySceneData;
		dummySceneData.ambientColor = Nz::Color(0, 0, 0);
		dummySceneData.background = nullptr;
		dummySceneData.viewer = nullptr; //< Depth technique doesn't require any viewer

		for (const Ndk::EntityHandle& light : m_pointSpotLights)
		{
			LightComponent& lightComponent = light->GetComponent<LightComponent>();
			NodeComponent& lightNode = light->GetComponent<NodeComponent>();

			if (!lightComponent.IsShadowCastingEnabled())
				continue;

			Nz::Vector2ui shadowMapSize(lightComponent.GetShadowMap()->GetSize());

			switch (lightComponent.GetLightType())
			{
				case Nz::LightType_Directional:
					NazaraInternalError("Directional lights included in point/spot light list");
					break;

				case Nz::LightType_Point:
				{
					static Nz::Quaternionf rotations[6] =
					{
						Nz::Quaternionf::RotationBetween(Nz::Vector3f::Forward(),  Nz::Vector3f::UnitX()), // CubemapFace_PositiveX
						Nz::Quaternionf::RotationBetween(Nz::Vector3f::Forward(), -Nz::Vector3f::UnitX()), // CubemapFace_NegativeX
						Nz::Quaternionf::RotationBetween(Nz::Vector3f::Forward(), -Nz::Vector3f::UnitY()), // CubemapFace_PositiveY
						Nz::Quaternionf::RotationBetween(Nz::Vector3f::Forward(),  Nz::Vector3f::UnitY()), // CubemapFace_NegativeY
						Nz::Quaternionf::RotationBetween(Nz::Vector3f::Forward(), -Nz::Vector3f::UnitZ()), // CubemapFace_PositiveZ
						Nz::Quaternionf::RotationBetween(Nz::Vector3f::Forward(),  Nz::Vector3f::UnitZ())  // CubemapFace_NegativeZ
					};

					for (unsigned int face = 0; face < 6; ++face)
					{
						m_shadowRT.AttachTexture(Nz::AttachmentPoint_Depth, 0, lightComponent.GetShadowMap(), face);
						Nz::Renderer::SetTarget(&m_shadowRT);
						Nz::Renderer::SetViewport(Nz::Recti(0, 0, shadowMapSize.x, shadowMapSize.y));

						///TODO: Cache the matrices in the light?
						Nz::Renderer::SetMatrix(Nz::MatrixType_Projection, Nz::Matrix4f::Perspective(Nz::FromDegrees(90.f), 1.f, 0.1f, lightComponent.GetRadius()));
						Nz::Renderer::SetMatrix(Nz::MatrixType_View, Nz::Matrix4f::ViewMatrix(lightNode.GetPosition(), rotations[face]));

						Nz::AbstractRenderQueue* renderQueue = m_shadowTechnique.GetRenderQueue();
						renderQueue->Clear();

						///TODO: Culling
						for (const Ndk::EntityHandle& drawable : m_drawables)
						{
							GraphicsComponent& graphicsComponent = drawable->GetComponent<GraphicsComponent>();

							graphicsComponent.AddToRenderQueue(renderQueue);
						}