65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
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/*******************************************************************************
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*
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* (C) COPYRIGHT MICROSOFT CORPORATION, 1998, 1999, 2000
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*
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* TITLE: RANDGEN.H
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*
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* VERSION: 1.0
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*
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* AUTHOR: ShaunIv
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*
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* DATE: 1/13/1999
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*
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* DESCRIPTION: Random number generator class
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*
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*******************************************************************************/
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#ifndef __RANDGEN_H_INCLUDED
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#define __RANDGEN_H_INCLUDED
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#include <windows.h>
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#ifndef RECT_WIDTH
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#define RECT_WIDTH(rc) (rc.right-rc.left)
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#endif
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#ifndef RECT_HEIGHT
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#define RECT_HEIGHT(rc) (rc.bottom-rc.top)
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#endif
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class CRandomNumberGen
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{
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private:
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long m_nOldRand;
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public:
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CRandomNumberGen( long nSeed = GetTickCount() )
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: m_nOldRand(nSeed)
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{
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}
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int Generate(void)
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{
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return(((m_nOldRand = m_nOldRand * 214013L + 2531011L) >> 16) & 0x7fff);
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}
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int Generate( int nMin, int nMax )
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{
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if (nMax - nMin == 0)
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return nMin;
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return(Generate() % (nMax - nMin)) + nMin;
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}
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int Generate( int nMax )
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{
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return (Generate( 0, nMax ));
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}
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RECT Generate( int nWidth, int nHeight, const RECT &rcRange )
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{
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RECT rcReturn;
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rcReturn.left = rcRange.left + Generate( 0, RECT_WIDTH(rcRange)-nWidth );
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rcReturn.top = rcRange.top + Generate( 0, RECT_HEIGHT(rcRange)-nHeight );
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rcReturn.right = rcReturn.left + nWidth;
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rcReturn.bottom = rcReturn.top + nHeight;
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return rcReturn;
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}
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};
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#endif
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