mirror of https://github.com/minetest/minetest.git
51 lines
1.1 KiB
C++
51 lines
1.1 KiB
C++
#include "map.h"
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#include "mapsector.h"
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#include "mapblock.h"
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#include "main.h"
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#include "filesys.h"
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#include "voxel.h"
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#include "porting.h"
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#include "mapgen.h"
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#include "nodemetadata.h"
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#include "settings.h"
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#include "log.h"
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#include "profiler.h"
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#include "nodedef.h"
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#include "gamedef.h"
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#include "util/directiontables.h"
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#include "rollback_interface.h"
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#include "database.h"
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static s32 unsignedToSigned(s32 i, s32 max_positive)
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{
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if(i < max_positive)
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return i;
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else
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return i - 2*max_positive;
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}
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// modulo of a negative number does not work consistently in C
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static s64 pythonmodulo(s64 i, s64 mod)
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{
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if(i >= 0)
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return i % mod;
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return mod - ((-i) % mod);
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}
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long long Database::getBlockAsInteger(const v3s16 pos) {
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return (unsigned long long)pos.Z*16777216 +
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(unsigned long long)pos.Y*4096 +
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(unsigned long long)pos.X;
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}
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v3s16 Database::getIntegerAsBlock(long long i) {
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s32 x = unsignedToSigned(pythonmodulo(i, 4096), 2048);
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i = (i - x) / 4096;
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s32 y = unsignedToSigned(pythonmodulo(i, 4096), 2048);
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i = (i - y) / 4096;
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s32 z = unsignedToSigned(pythonmodulo(i, 4096), 2048);
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return v3s16(x,y,z);
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}
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