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Added constructors with 2 params _min and _max in generators

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so you can now generate things in [_min, _max) instead of [0,_max) only
Modified the private data from maxim to {minim, range} accordingly.
This commit is contained in:
evomarc 2000-11-05 05:33:43 +00:00
commit 6fc47590cd
1 changed files with 35 additions and 11 deletions
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46
eo/src/utils/rnd_generators.h
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@ -35,17 +35,29 @@
/**
The class uniform_generator can be used in the STL generate function
to easily generate random floats and doubles between [0, _max). _max
defaults to 1.0
to easily generate random floats and doubles
either in [0, _max) if only 1 value (_max) is given
(or none, as _max defaults to 1.0)
or in [_min,_max) if 2 values are given (_min, _max)
*/
template <class T = double> class uniform_generator
{
// added new ctor with 2 params, and modified the data to minim and range
// (was maxim only). MS 3/11/2000
public :
uniform_generator(T _max = T(1.0), eoRng& _rng = rng) : maxim(_max), uniform(_rng) {}
uniform_generator(T _max = T(1.0), eoRng& _rng = rng) :
minim(T(0.0)), range(_max), uniform(_rng) {}
uniform_generator(T _min, T _max, eoRng& _rng = rng) :
minim(_min), range(_max-_min), uniform(_rng)
{
if (_min>_max)
throw logic_error("Min is greater than Max in uniform_generator");
}
T operator()(void) { return (T) uniform.uniform(maxim); }
private :
T maxim;
T operator()(void) { return (T) minim+uniform.uniform(range); }
private :
T minim;
T range;
eoRng& uniform;
};
@ -66,17 +78,29 @@ class boolean_generator
/**
The class random_generator can be used in the STL generate function
to easily generate random ints between [0, _max).
to easily generate random ints
either between [0, _max) if only one value (_max) is given to the ctor
or in [_min,_max) if 2 values are given (_min, _max)
*/
template <class T = uint32> class random_generator
{
public :
random_generator(T _max, eoRng& _rng = rng) : maxim(_max), random(_rng) {}
// added new ctor with 2 params, and modified the data to minim and range
// (was maxim only). MS 3/11/2000
random_generator(T _max, eoRng& _rng = rng) :
minim(T(0.0)), range(_max), random(_rng) {}
random_generator(T _min, T _max, eoRng& _rng = rng) :
minim(_min), range(_max-_min), random(_rng)
{
if (_min>_max)
throw logic_error("Min is greater than Max in random_generator");
}
T operator()(void) { return (T) random.random(maxim); }
T operator()(void) { return (T) (minim + random.random(range)); }
private :
T maxim;
private :
T minim;
T range;
eoRng& random;
};