SCA_RandomNumberGenerator.h

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/*
 * ***** 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 */