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- /*
- * Bael'Zharon's Respite
- * Copyright (C) 2014 Daniel Skorupski
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 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 General Public License for more details.
- *
- * You should have received a copy of the GNU 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 "PRNG.h"
- double prng(uint32_t cell_x, uint32_t cell_y, uint32_t seed)
- {
- uint32_t ival = 0x6C1AC587 * cell_y - 0x421BE3BD * cell_x -
- seed * (0x5111BFEF * cell_y * cell_x + 0x70892FB7);
- return static_cast<double>(ival) / static_cast<double>(UINT32_MAX);
- }
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