mirror of https://github.com/axmolengine/axmol.git
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
|
/****************************************************************************
|
||
|
|
Copyright (c) 2010 cocos2d-x.org
|
||
|
|
Copyright (c) 2013-2014 Chukong Technologies Inc.
|
||
|
|
|
||
|
|
http://www.cocos2d-x.org
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#ifndef __ccRandom_H_
|
||
|
|
#define __ccRandom_H_
|
||
|
|
|
||
|
|
#include "base/CCPlatformMacros.h"
|
||
|
|
#include <random>
|
||
|
|
|
||
|
|
|
||
|
|
NS_CC_BEGIN
|
||
|
|
|
||
|
|
class RandomHelper {
|
||
|
|
public:
|
||
|
|
template<typename T>
|
||
|
|
static inline T random_real(T min, T max) {
|
||
|
|
std::uniform_real_distribution<T> dist(min, max);
|
||
|
|
std::mt19937 mt = RandomHelper::getEngine();
|
||
|
|
return dist(mt);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
static inline T random_int(T min, T max) {
|
||
|
|
std::uniform_int_distribution<> dist(min, max);
|
||
|
|
std::mt19937 mt = RandomHelper::getEngine();
|
||
|
|
return dist(mt);
|
||
|
|
}
|
||
|
|
private:
|
||
|
|
static std::mt19937 getEngine() {
|
||
|
|
static std::random_device seed_gen;
|
||
|
|
static std::mt19937 engine(seed_gen());
|
||
|
|
return engine;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* returns a random value between `min` and `max`
|
||
|
|
*/
|
||
|
|
template<typename T>
|
||
|
|
inline T random(T min, T max) {
|
||
|
|
return RandomHelper::random_int(min, max);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<>
|
||
|
|
inline float random(float min, float max) {
|
||
|
|
return RandomHelper::random_real(min, max);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<>
|
||
|
|
inline long double random(long double min, long double max) {
|
||
|
|
return RandomHelper::random_real(min, max);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<>
|
||
|
|
inline double random(double min, double max) {
|
||
|
|
return RandomHelper::random_real(min, max);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* returns a random int between 0 and RAND_MAX
|
||
|
|
*/
|
||
|
|
inline int random() {
|
||
|
|
return cocos2d::random(0, RAND_MAX);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* returns a random float between -1 and 1
|
||
|
|
*/
|
||
|
|
inline float rand_minus1_1() {
|
||
|
|
return cocos2d::random(-1.f, 1.f);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* returns a random float between 0 and 1
|
||
|
|
*/
|
||
|
|
inline float rand_0_1() {
|
||
|
|
return cocos2d::random(0.f, 1.f);
|
||
|
|
};
|
||
|
|
|
||
|
|
NS_CC_END
|
||
|
|
#endif //__ccRandom_H_
|