Utils.hpp

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/*
   Copyright 2022 Rishi Challa
 
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
 
       http://www.apache.org/licenses/LICENSE-2.0
 
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
 
#pragma once
 
#include <Kale/Math/Constants/Constants.hpp>
 
#include <limits>
#include <random>
 
namespace Kale {
 
    enum class AngleUnit : bool {
        Degree, Radian
    };
 
    constexpr float degToRad(float deg) {
        return deg / 180.0f * PI;
    }
 
    constexpr float radToDeg(float rad) {
        return rad / PI * 180.0f;
    }
 
    template <typename T> bool isFloating0(T num, T epsilon = std::numeric_limits<T>::epsilon()) {
        return num <= epsilon && num >= -epsilon;
    }
 
    template <typename T> bool isFloatingEqual(T num1, T num2, T epsilon = std::numeric_limits<T>::epsilon()) {
        T tmp = num1 - num2;
        return tmp <= epsilon && tmp >= -epsilon;
    }
 
    template <typename T> int sign(T val) {
        return (T(0) < val) - (val < T(0));
    }
 
    template <typename T> typename std::enable_if<std::is_floating_point<T>::value, T>::type randomRange(T min, T max) {
        static thread_local std::random_device randomDevice;
        static thread_local std::mt19937 generator(randomDevice());
        std::uniform_real_distribution<T> distribution(min,max);
        return distribution(generator);
    }
 
    template <typename T> typename std::enable_if<std::is_integral<T>::value, T>::type randomRange(T min, T max) {
        static thread_local std::random_device randomDevice;
        static thread_local std::mt19937 generator(randomDevice());
        std::uniform_int_distribution<T> distribution(min,max);
        return distribution(generator);
    }
 
}