86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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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 2
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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 Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file SCA_RandomNumberGenerator.h
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* \ingroup gamelogic
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* \brief Generate random numbers that can be used by other components. Each
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* generator needs its own generator, so that the seed can be set
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* on a per-generator basis.
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*/
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#ifndef __SCA_RANDOMNUMBERGENERATOR_H__
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#define __SCA_RANDOMNUMBERGENERATOR_H__
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#ifdef WITH_CXX_GUARDEDALLOC
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#include "MEM_guardedalloc.h"
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#endif
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class SCA_RandomNumberGenerator {
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/* reference counted for memleak */
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int m_refcount;
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/** base seed */
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long m_seed;
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/* A bit silly.. The N parameter is a define in the .cpp file */
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/** the array for the state vector */
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/* unsigned long mt[N]; */
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unsigned long mt[624];
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/** mti==N+1 means mt[KX_MT_VectorLength] is not initialized */
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int mti; /* initialized in the cpp file */
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/** Calculate a start vector */
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void SetStartVector(void);
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public:
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SCA_RandomNumberGenerator(long seed);
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~SCA_RandomNumberGenerator();
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unsigned long Draw();
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float DrawFloat();
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long GetSeed();
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void SetSeed(long newseed);
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SCA_RandomNumberGenerator* AddRef()
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{
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++m_refcount;
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return this;
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}
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void Release()
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{
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if (--m_refcount == 0)
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delete this;
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}
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#ifdef WITH_CXX_GUARDEDALLOC
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MEM_CXX_CLASS_ALLOC_FUNCS("GE:SCA_RandomNumberGenerator")
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#endif
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};
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#endif /* __SCA_RANDOMNUMBERGENERATOR_H__ */
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