X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fworld%2FChunkIndex.hpp;h=1823de72b154359c4635a7a0e4f0d1d55ae6f9db;hb=4727825186798902f68df5b99a6a32f0ef618454;hp=6749737acb8f6966101aad7ba92a78f89d81ff35;hpb=13e676a6e49128ebc6c63b8dd08bef51d360e8e9;p=blank.git

diff --git a/src/world/ChunkIndex.hpp b/src/world/ChunkIndex.hpp
index 6749737..1823de7 100644
--- a/src/world/ChunkIndex.hpp
+++ b/src/world/ChunkIndex.hpp
@@ -1,7 +1,9 @@
 #ifndef BLANK_WORLD_CHUNKINDEX_HPP_
 #define BLANK_WORLD_CHUNKINDEX_HPP_
 
+#include "BlockLookup.hpp"
 #include "Chunk.hpp"
+#include "../rand/GaloisLFSR.hpp"
 
 #include <vector>
 
@@ -13,33 +15,51 @@ class ChunkStore;
 class ChunkIndex {
 
 public:
-	ChunkIndex(ChunkStore &, const Chunk::Pos &base, int extent);
+	ChunkIndex(ChunkStore &, const ExactLocation::Coarse &base, int extent);
 	~ChunkIndex();
 
 	ChunkIndex(const ChunkIndex &) = delete;
 	ChunkIndex &operator =(const ChunkIndex &) = delete;
 
 public:
-	bool InRange(const Chunk::Pos &) const noexcept;
-	int IndexOf(const Chunk::Pos &) const noexcept;
-	Chunk::Pos PositionOf(int) const noexcept;
+	bool InRange(const ExactLocation::Coarse &) const noexcept;
+	bool IsBorder(const ExactLocation::Coarse &) const noexcept;
+	int Distance(const ExactLocation::Coarse &) const noexcept;
+
+	bool HasAllSurrounding(const ExactLocation::Coarse &) const noexcept;
+
+	int IndexOf(const ExactLocation::Coarse &) const noexcept;
+	ExactLocation::Coarse PositionOf(int) const noexcept;
+
 	/// returns nullptr if given position is out of range or the chunk
 	/// is not loaded, so also works as a "has" function
-	Chunk *Get(const Chunk::Pos &) noexcept;
-	const Chunk *Get(const Chunk::Pos &) const noexcept;
+	Chunk *Get(const ExactLocation::Coarse &) noexcept;
+	const Chunk *Get(const ExactLocation::Coarse &) const noexcept;
 	Chunk *operator [](int i) noexcept { return chunks[i]; }
 	const Chunk *operator [](int i) const noexcept { return chunks[i]; }
 
+	Chunk *RandomChunk(GaloisLFSR &rand) {
+		return rand.From(chunks);
+	}
+	BlockLookup RandomBlock(GaloisLFSR &rand) {
+		return BlockLookup(RandomChunk(rand), Chunk::ToPos(rand.Next<unsigned int>() % Chunk::size));
+	}
+
+	int Extent() const noexcept { return extent; }
+
+	ExactLocation::Coarse CoordsBegin() const noexcept { return base - ExactLocation::Coarse(extent); }
+	ExactLocation::Coarse CoordsEnd() const noexcept { return base + ExactLocation::Coarse(extent + 1); }
+
 	void Register(Chunk &) noexcept;
 
 	int TotalChunks() const noexcept { return total_length; }
 	int IndexedChunks() const noexcept { return total_indexed; }
 	int MissingChunks() const noexcept { return total_length - total_indexed; }
 
-	Chunk::Pos NextMissing() noexcept;
+	ExactLocation::Coarse NextMissing() noexcept;
 
-	const Chunk::Pos &Base() const noexcept { return base; }
-	void Rebase(const Chunk::Pos &);
+	const ExactLocation::Coarse &Base() const noexcept { return base; }
+	void Rebase(const ExactLocation::Coarse &);
 
 private:
 	int GetCol(int) const noexcept;
@@ -54,7 +74,7 @@ private:
 
 private:
 	ChunkStore &store;
-	Chunk::Pos base;
+	ExactLocation::Coarse base;
 	int extent;
 	int side_length;
 	int total_length;