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App/voxel/AreaCopy.h

@@ -0,0 +1,68 @@
+#pragma once
+
+#include "Util/G3DCore.h"
+#include "Voxel/Cell.h"
+#include "Voxel/Region.h"
+#include "Voxel/Water.h"
+
+#include <boost/scoped_ptr.hpp>
+#include <vector>
+
+namespace RBX { namespace Voxel {
+
+// Helper object for tasks that need fast access to voxel cells across
+// SpatialRegion boundaries. Keeps an internal buffer of cells, size determined
+// by template parameters. Buffer can be refreshed from another voxel storage
+// mechanism (or another AreaCopy) repeatedly.
+template<unsigned int XDim, unsigned int YDim, unsigned int ZDim>
+class AreaCopy {
+	// Helper object to comply with the Region API
+	class Chunk {
+		static const int kSize = XDim * YDim * ZDim;
+		
+		std::vector<Cell> cells;
+		std::vector<unsigned char> materials;
+		Vector3int16 firstCellLocation;
+		bool isAllEmpty;
+
+		bool contains(const Vector3int16& cellLoc) const;
+		void fillEmpty(const Vector3int16& minLoc, const Vector3int16& maxLoc);
+		template<class RegionType>
+		void fillFromRegion(const RegionType& region);
+
+	public:
+		// Chunk API
+		static const int kXOffsetMultiplier = 1;
+		static const int kYOffsetMultiplier = XDim * ZDim;
+		static const int kZOffsetMultiplier = XDim;
+
+		static int kFaceDirectionToPointerOffset[7];
+		static int voxelCoordOffsetToIndexOffset(const Vector3int16& offsetCoord);
+		int voxelCoordToArrayIndex(const Vector3int16& globalCoord) const;
+		const std::vector<Cell>& getConstData() const;
+		const std::vector<unsigned char>& getConstMaterial() const;
+		void fillLocalAreaInfo(const Vector3int16& loc,
+			const Water::RelevantNeighbors& neighbors, Water::LocalAreaInfo* out)
+			const;
+
+		// other methods
+		template<class Source>
+		void loadData(const Source* source, const Vector3int16& firstCellLocation);
+		bool getIsAllEmpty() const;
+	};
+
+	Chunk storage;
+
+public:
+	typedef RBX::Voxel::Region<Chunk> Region;
+	static const Region kStaticEndRegion;
+
+	Region getRegion(const Vector3int16& minCoords, const Vector3int16& maxCoords) const;
+
+	template<class Source>
+	void loadData(const Source* source, const Vector3int16& rootCell);
+};
+
+} }
+
+#include "AreaCopy.inl"