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author | Matthias Schiffer <mschiffer@universe-factory.net> | 2015-02-02 01:41:17 +0100 |
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committer | Matthias Schiffer <mschiffer@universe-factory.net> | 2015-02-02 01:41:17 +0100 |
commit | 8c1629af42a10ff7e23bb40100a259bf334a9c60 (patch) | |
tree | 123a427489f9317285996dc24f91c350d793e317 /src/World/Region.hpp | |
parent | 1e5e31581689d372fbf32bfdcc0a89417dbf6b70 (diff) | |
download | MinedMap-8c1629af42a10ff7e23bb40100a259bf334a9c60.tar MinedMap-8c1629af42a10ff7e23bb40100a259bf334a9c60.zip |
Change region reader to a visitor pattern
Not keeping the whole region in memory reduces the needed space
to less than 5MB (from about 140).
Diffstat (limited to 'src/World/Region.hpp')
-rw-r--r-- | src/World/Region.hpp | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/src/World/Region.hpp b/src/World/Region.hpp index 0843724..d88dbe1 100644 --- a/src/World/Region.hpp +++ b/src/World/Region.hpp @@ -28,6 +28,7 @@ #include "Chunk.hpp" +#include <functional> #include <memory> #include <stdexcept> #include <tuple> @@ -41,23 +42,18 @@ class Region { public: static const size_t SIZE = 32; + typedef std::function<void (size_t, size_t, const Chunk *)> ChunkVisitor; + + Region() = delete; + private: typedef std::tuple<size_t, size_t, size_t> ChunkDesc; typedef std::unordered_map<size_t, ChunkDesc> ChunkMap; - std::unique_ptr<Chunk> chunks[SIZE][SIZE]; - static ChunkMap processHeader(const uint8_t header[4096]); public: - Region(const char *filename); - - const Chunk * operator()(size_t x, size_t z) { - if (x >= SIZE || z >= SIZE) - throw std::range_error("Region(): bad coordinates"); - - return chunks[x][z].get(); - } + static void visitChunks(const char *filename, ChunkVisitor visitor); }; } |