78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
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# ifndef SR_RANDOM_H
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# define SR_RANDOM_H
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/** \file sr_random.h
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* Random number generation */
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//================================= SrRandom ====================================
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/*! Random methods use a custom random generator with resolution of 2^32-1 */
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class SrRandom
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{ private:
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double _inf, _sup, _dif;
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char _type; // 'd', 'f', or 'i'
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public :
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/*! Default constructor sets the random generator to have
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limits [0,1] and type float */
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SrRandom ();
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/*! Constructor with given limits in type double, with 53-bit resolution */
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SrRandom ( double inf, double sup ) { limits(inf,sup); }
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/*! Constructor with given limits in type float, with 32-bit resolution */
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SrRandom ( float inf, float sup ) { limits(inf,sup); }
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/*! Constructor with given integer limits. */
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SrRandom ( int inf, int sup ) { limits(inf,sup); }
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/*! Sets limits in type double, with 53-bit resolution */
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void limits ( double inf, double sup );
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/*! Sets limits in type float, with 32-bit resolution. */
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void limits ( float inf, float sup, int br=15 );
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/*! Sets integer limits.. */
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void limits ( int inf, int sup );
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/*! Returns the type on which the limits were set: 'd', 'f', or 'i' */
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char type () { return _type; }
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/*! Returns the superior limit. */
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double inf () { return _inf; }
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/*! Returns the inferior limit. */
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double sup () { return _sup; }
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/*! Returns a random integer number in [inf,sup]. */
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int geti ();
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/*! Returns a random float number in [inf,sup], with 32-bit resolution. */
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float getf ();
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/*! Returns a random double number in [inf,sup], with 53-bit resolution. */
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double getd ();
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/*! Set limits and returns one corresponding random value. */
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int get ( int inf, int sup ) { limits(inf,sup); return geti(); }
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/*! Set limits and returns one corresponding random value, with 32-bit resolution. */
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float get ( float inf, float sup ) { limits(inf,sup); return getf(); }
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/*! Set limits and returns one corresponding random value, with 53-bit resolution. */
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double get ( double inf, double sup ) { limits(inf,sup); return getd(); }
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/*! Sets the starting point for generating random numbers. The seed is 1 by default. */
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static void seed ( unsigned long seed );
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/*! Returns a random float in [0,1], with 32-bit resolution */
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static float randf ();
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};
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//============================== end of file ======================================
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# endif // SR_RANDOM_H
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