3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #include "irrlichttypes.h"
23 static s32 unsignedToSigned(s32 i, s32 max_positive)
28 return i - 2*max_positive;
31 // modulo of a negative number does not work consistently in C
32 static s64 pythonmodulo(s64 i, s64 mod)
36 return mod - ((-i) % mod);
39 long long Database::getBlockAsInteger(const v3s16 pos) {
40 return (unsigned long long)pos.Z*16777216 +
41 (unsigned long long)pos.Y*4096 +
42 (unsigned long long)pos.X;
45 v3s16 Database::getIntegerAsBlock(long long i) {
46 s32 x = unsignedToSigned(pythonmodulo(i, 4096), 2048);
48 s32 y = unsignedToSigned(pythonmodulo(i, 4096), 2048);
50 s32 z = unsignedToSigned(pythonmodulo(i, 4096), 2048);