39 lines
994 B
C++
39 lines
994 B
C++
#ifndef UTIL_H
|
|
#define UTIL_H
|
|
|
|
#include <limits>
|
|
#include <random>
|
|
#include <ctime>
|
|
#include <functional>
|
|
|
|
const double infinity = std::numeric_limits<double>::infinity();
|
|
const double pi = 3.1415926535897932385;
|
|
|
|
inline double degrees_to_radians(double degrees) {
|
|
return degrees * pi / 180;
|
|
}
|
|
|
|
inline double random_double() {
|
|
static std::uniform_real_distribution<double> distribution(0.0, 1.0);
|
|
//static std::mt19937 generator(std::time(nullptr));
|
|
static thread_local std::mt19937 generator(std::random_device{}());
|
|
static std::function<double()> rand_gen = std::bind(distribution, generator);
|
|
return rand_gen();
|
|
}
|
|
|
|
inline double random_double(double min, double max) {
|
|
return min + (max-min) * random_double();
|
|
}
|
|
|
|
inline int random_int(int min, int max) {
|
|
return static_cast<int>(random_double(min, max+1));
|
|
}
|
|
|
|
inline double clamp(double x, double min, double max) {
|
|
if (x < min) return min;
|
|
if (x > max) return max;
|
|
return x;
|
|
}
|
|
|
|
#endif // UTIL_H
|