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Adjust common/random.h based on N3551

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This commit is contained in:
Michael Cook (mackal) 2014-12-14 19:38:23 -05:00
parent c85cbb2f08
commit 026d5e71fa
1 changed files with 10 additions and 6 deletions
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16
common/random.h
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@ -33,31 +33,31 @@ namespace EQEmu {
class Random { class Random {
public: public:
// AKA old MakeRandomInt // AKA old MakeRandomInt
const int Int(int low, int high) int Int(int low, int high)
{ {
if (low > high) if (low > high)
std::swap(low, high); std::swap(low, high);
return std::uniform_int_distribution<int>(low, high)(m_gen); // [low, high] return int_dist(m_gen, int_param_t(low, high)); // [low, high]
} }
// AKA old MakeRandomFloat // AKA old MakeRandomFloat
const double Real(double low, double high) double Real(double low, double high)
{ {
if (low > high) if (low > high)
std::swap(low, high); std::swap(low, high);
return std::uniform_real_distribution<double>(low, high)(m_gen); // [low, high) return real_dist(m_gen, real_param_t(low, high)); // [low, high)
} }
// example Roll(50) would have a 50% success rate // example Roll(50) would have a 50% success rate
// Roll(100) 100%, etc // Roll(100) 100%, etc
// valid values 0-100 (well, higher works too but ...) // valid values 0-100 (well, higher works too but ...)
const bool Roll(const int required) bool Roll(const int required)
{ {
return Int(0, 99) < required; return Int(0, 99) < required;
} }
// valid values 0.0 - 1.0 // valid values 0.0 - 1.0
const bool Roll(const double required) bool Roll(const double required)
{ {
return Real(0.0, 1.0) <= required; return Real(0.0, 1.0) <= required;
} }
@ -76,7 +76,11 @@ namespace EQEmu {
} }
private: private:
typedef std::uniform_int_distribution<int>::param_type int_param_t;
typedef std::uniform_real_distribution<double>::param_type real_param_t;
std::mt19937 m_gen; std::mt19937 m_gen;
std::uniform_int_distribution<int> int_dist;
std::uniform_real_distribution<double> real_dist;
}; };
} }