advtrains.git - Advtrains mod for minetest.

	Commit message (Collapse)	Author	Age
*	Remove zip release files, move mod to root, exclude assets from Makefile (#92)	rubenwardy	2017-09-20
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*	Restructure mod directory	orwell96	2017-01-04
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*	Turning mod into a modpack and separating the trains from the core mod	orwell96	2016-12-20

; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "database.h" #include "irrlichttypes.h" /**************** * Black magic! * **************** * The position hashing is very messed up. * It's a lot more complicated than it looks. */ static inline s16 unsigned_to_signed(u16 i, u16 max_positive) { if (i < max_positive) { return i; } else { return i - (max_positive * 2); } } // Modulo of a negative number does not work consistently in C static inline s64 pythonmodulo(s64 i, s16 mod) { if (i >= 0) { return i % mod; } return mod - ((-i) % mod); } s64 Database::getBlockAsInteger(const v3s16 pos) const { return (u64) pos.Z * 0x1000000 + (u64) pos.Y * 0x1000 + (u64) pos.X; } v3s16 Database::getIntegerAsBlock(s64 i) const { v3s16 pos; pos.X = unsigned_to_signed(pythonmodulo(i, 4096), 2048); i = (i - pos.X) / 4096; pos.Y = unsigned_to_signed(pythonmodulo(i, 4096), 2048); i = (i - pos.Y) / 4096; pos.Z = unsigned_to_signed(pythonmodulo(i, 4096), 2048); return pos; }