HMathUtils.h
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//
// HMathUtils.h
// SteveMaggieCpp
//
// Created by Katarzyna Kalinowska-Górska on 10.05.2017.
//
//
#ifndef HMathUtils_h
#define HMathUtils_h
#include <stdio.h>
#include <numeric>
#include <deque>
#include <random>
#include "cocos2d.h"
class HMathUtils {
public:
// Returns a random number between min (inclusive) and max (exclusive)
static double getRandom(double min, double max);
// Returns a random integer between min (included) and max (excluded)
static int getRandomInt(int min, int max);
static cocos2d::Color4F getRandomOpaqueColor();
static int signum(float expression){
if(expression < 0){
return -1;
} else if(expression > 0){
return 1;
}
return 0;
};
template<class T>
static T getRandomElement(std::vector<T>& arr){
auto size = arr.size();
if(size > 0){
int randomIndex = HMathUtils::getRandomInt(0, (int)size-1);
return arr[randomIndex];
}
throw "Empty array!";
}
template<class T>
static void shuffleArray(std::vector<T>& arr)
{
int currentIndex = (int)arr.size(), randomIndex;
T temporaryValue;
// While there remain elements to shuffle...
while (0 != currentIndex) {
// Pick a remaining element...
randomIndex = HMathUtils::getRandomInt(0, currentIndex-1);
currentIndex -= 1;
// And swap it with the current element.
temporaryValue = arr[currentIndex];
arr[currentIndex] = arr[randomIndex];
arr[randomIndex] = temporaryValue;
}
}
template<class T>
static void multiplyArray(std::vector<T>& arr, T byValue)
{
for(int i = 0; i < arr.size(); ++i){
arr[i] *= byValue;
}
}
template<class T>
static void multiplyPointArray(std::vector<cocos2d::Point>& arr, T byValue)
{
for(int i = 0; i < arr.size(); ++i){
arr[i].x *= byValue;
arr[i].y *= byValue;
}
}
template<class T>
static void multiplyRectPositionsArray(std::vector<cocos2d::Rect>& arr, T byValue)
{
for(int i = 0; i < arr.size(); ++i){
arr[i].origin.x *= byValue;
arr[i].origin.y *= byValue;
arr[i].size.width *= byValue;
arr[i].size.height *= byValue;
}
}
template<class T>
static void multiplyRectPosition(cocos2d::Rect& rect, T byValue)
{
rect.origin.x *= byValue;
rect.origin.y *= byValue;
rect.size.width *= byValue;
rect.size.height *= byValue;
}
template<class T>
static void multiplyPoint(cocos2d::Point& point, T byValue)
{
point.x *= byValue;
point.y *= byValue;
}
//NOT WORKING, WHY? Container size is always 0.
// template<class T, class Container>
// static void averageValue(const Container& valueArray, T& averageValue){
// if(valueArray.size() == 0){
// averageValue = 0;
// } else {
// averageValue = std::accumulate(valueArray.begin(), valueArray.end(), 0) / valueArray.size();
// }
// }
//temp
static void averageValue(const std::deque<float>& valueArray, float& averageValue){
if(valueArray.size() == 0){
averageValue = 0;
} else {
float size = valueArray.size();
averageValue = std::accumulate(valueArray.begin(), valueArray.end(), 0) / size;
}
}
// static void drawRoundedCorneredRect(cocos2d::DrawNode*, cocos2d::Rect rect, float cornerRadius, cocos2d::Color4F&);
private:
static std::mt19937 _getRNG();
};
#endif /* HMathUtils_h */