SCA_RandomNumberGenerator.h

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/*
 * $Id: SCA_RandomNumberGenerator.h 35063 2011-02-22 10:33:14Z jesterking $
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef __KX_RANDOMNUMBERGENERATOR
#define __KX_RANDOMNUMBERGENERATOR

#ifdef WITH_CXX_GUARDEDALLOC
#include "MEM_guardedalloc.h"
#endif

class SCA_RandomNumberGenerator {

        /* reference counted for memleak */
        int m_refcount;

        long m_seed;

        /* A bit silly.. The N parameter is a define in the .cpp file */
        /* unsigned long mt[N]; */
        unsigned long mt[624];

        int mti; /* initialised in the cpp file */

        void SetStartVector(void);
 public:
        SCA_RandomNumberGenerator(long seed);
        ~SCA_RandomNumberGenerator();
        unsigned long Draw();
        float DrawFloat();
        long GetSeed();
        void SetSeed(long newseed);
        SCA_RandomNumberGenerator* AddRef()
        {
                ++m_refcount;
                return this;
        }
        void Release()
        {
                if (--m_refcount == 0)
                        delete this;
        }
        
        
#ifdef WITH_CXX_GUARDEDALLOC
public:
        void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:SCA_RandomNumberGenerator"); }
        void operator delete( void *mem ) { MEM_freeN(mem); }
#endif
};

#endif /* __KX_RANDOMNUMBERGENERATOR */