340fc18548
2) Moved STK specific extensions to bullet out of bullet src tree. 3) Started to move more files into separate subdirs. git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@3027 178a84e3-b1eb-0310-8ba1-8eac791a3b58
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
// $Id: randum_number.cpp 2163 2008-07-14 03:40:58Z hikerstk $
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//
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// SuperTuxKart - a fun racing game with go-kart
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// Copyright (C) 2008 Joerg Henrichs
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 3
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#include "random_generator.hpp"
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#include <stdlib.h>
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#include <ctime>
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std::vector<RandomGenerator*> RandomGenerator::m_all_random_generators;
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RandomGenerator::RandomGenerator()
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{
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m_a = 1103515245;
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m_c = 12345;
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m_all_random_generators.push_back(this);
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m_random_value = 3141591;
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std::srand((unsigned int)std::time(0));
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} // RandomGenerator
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// ----------------------------------------------------------------------------
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std::vector<int> RandomGenerator::generateAllSeeds()
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{
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std::vector<int> all_seeds;
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for(unsigned int i=0; i<m_all_random_generators.size(); i++)
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{
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int seed = rand();
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all_seeds.push_back(seed);
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m_all_random_generators[i]->seed(seed);
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}
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return all_seeds;
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} // generateAllSeeds
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#if 0
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// ----------------------------------------------------------------------------
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int RandomGenerator::get(int n)
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{
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// This generator is (currently) not good enough, i.e. it often gives
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// long sequences of same numbers. And the seeding is not done (the
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// mid term goal is to synchronise all random number generators on
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// client and server to make less communication necessary).
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// For now: just use standard random numbers:
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return rand() % n;
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#ifdef NOT_USED_ATM
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m_random_value = m_random_value*m_a+m_c;
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// Note: the lower bits can have a very short cycle, e.g. for n = 4 the
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// cycle length is 4, meaning that the same sequence 1,2,3,4 is repeated
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// over and over again. The higher bits are more random, so the lower
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// 8 bits are discarded.
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return (m_random_value >> 8) % n;
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#endif
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} // get
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#endif // if 0
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