Graphics: Rework shadowing (add cascaded shadow mapping)

- Add support for per-viewer shadows
- Add cascaded shadow mapping for directional lights (wip)
- Rework the way lights are sent to the shaders (they are now selected once per viewer)
- Fixes PointLight shadow mapping (using a dedicated pass)
- Lights out of frustum for every viewers are no longer processed (wip)

include/Nazara/Graphics/DirectionalLightShadowData.inl

@@ -0,0 +1,42 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Graphics module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <cassert>
+#include <Nazara/Graphics/Debug.hpp>
+
+namespace Nz
+{
+	inline void DirectionalLightShadowData::EnableShadowStabilization(bool enable)
+	{
+		m_isShadowStabilizationEnabled = enable;
+	}
+
+	inline std::size_t DirectionalLightShadowData::GetCascadeCount() const
+	{
+		return m_cascadeCount;
+	}
+
+	inline void DirectionalLightShadowData::GetCascadeData(const AbstractViewer* viewer, SparsePtr<float> distance, SparsePtr<Matrix4f> viewProjMatrix) const
+	{
+		assert(viewer);
+		PerViewerData& viewerData = *Retrieve(m_viewerData, viewer);
+
+		for (const auto& cascadeData : viewerData.cascades)
+		{
+			if (distance)
+				*distance++ = cascadeData.distance;
+
+			if (viewProjMatrix)
+				*viewProjMatrix++ = cascadeData.viewProjMatrix;
+		}
+	}
+
+	inline bool DirectionalLightShadowData::IsShadowStabilization() const
+	{
+		return m_isShadowStabilizationEnabled;
+	}
+}
+
+#include <Nazara/Graphics/DebugOff.hpp>
+