text: ﻿#region C#raft License
  // This file is part of C#raft. Copyright C#raft Team 
  // 
  // C#raft is free software: you can redistribute it and/or modify
  // it under the terms of the GNU Affero General Public License as
  // published by the Free Software Foundation, either version 3 of the
  // License, or (at your option) any later version.
  // 
  // This program is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU Affero General Public License for more details.
  // 
  // You should have received a copy of the GNU Affero General Public License
  // along with this program. If not, see <http://www.gnu.org/licenses/>.
  #endregion
  
  using System;
  
  namespace Chraft.Utilities.Math
  {
      public static class MathExtensions
      {
          public static T Clamp<T>(this T val, T min, T max) where T : IComparable<T>
          {
              if (val.CompareTo(min) < 0) return min;
              else if (val.CompareTo(max) > 0) return max;
              else return val;
          }
  
          private const double _180OverPi = 180.0 / System.Math.PI;
          private const double _PiOver180 = System.Math.PI / 180.0;
  
          /// <summary>
          /// Converts a double from degrees to radians
          /// </summary>
          /// <param name="val"></param>
          /// <returns></returns>
          public static double ToRadians(this double val)
          {
              return val * _PiOver180;
          }
  
          /// <summary>
          /// Converts a double from radians to degrees
          /// </summary>
          /// <param name="val"></param>
          /// <returns></returns>
          public static double ToDegrees(this double val)
          {
              return val * _180OverPi;
          }
  
          private const double EqualityTolerence = Double.Epsilon;
  
          /// <summary>
          /// Compares two doubles for equality, returning true if the absolute difference is less than or equal to Double.Epsilon
          /// </summary>
          /// <param name="val1"></param>
          /// <param name="val2"></param>
          /// <returns></returns>
          public static bool DoubleIsEqual(this double val1, double val2)
          {
              return System.Math.Abs(val1 - val2) <= EqualityTolerence;
          }
      }
  }
  