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
50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
// $Id: randum_number.hpp 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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#ifndef HEADER_RANDOM_GENERATOR_HPP
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#define HEADER_RANDOM_GENERATOR_HPP
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#include <algorithm>
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#include <vector>
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/** A random number generator. Each objects that needs a random number uses
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its own number random generator. They are all seeded with number provided
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by the server. This guarantees that in a network game all 'random' values
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are actually identical among all machines.
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The formula used is x(n+1)=(a*x(n)+c) % m, but m is assumed to be 2^32,
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so the modulo operation can be skipped (for 4 byte integers).
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*/
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class RandomGenerator
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{
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private:
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unsigned int m_random_value;
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unsigned int m_a, m_c;
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static std::vector<RandomGenerator*> m_all_random_generators;
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public:
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RandomGenerator();
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std::vector<int> generateAllSeeds();
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/** Returns a pseudo random number between 0 and n-1 inclusive */
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int get(int n) {return rand() % n; }
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void seed(int s) {m_random_value = s;}
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}; // RandomGenerator
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#endif // HEADER_RANDOM_GENERATOR_HPP
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