Change folder structure, add solution to the root.

This commit is contained in:
2023-06-18 17:19:03 +02:00
parent d5f5fb5614
commit 15747d7e9b
51 changed files with 33 additions and 6 deletions

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/// <summary>
/// https://github.com/YourRobotOverlord/LehmerRandom/blob/master/Lehmer/Random.cs
/// Alternative to System.Random based on the Lehmer algorithm.
/// </summary>
public class LehmerRandom
{
// Stores the seed for the Next methods.
private uint _seed;
/// <summary>
/// Initializes a new instance of the Random class, using a time-dependent default seed value.
/// </summary>
public LehmerRandom()
{
_seed = (uint)System.Environment.TickCount;
}
/// <summary>
/// Initializes a new instance of the Random class, using the specified seed value.
/// </summary>
/// <param name="seed"></param>
public LehmerRandom(int seed)
{
_seed = (uint)seed;
}
/// <summary>
/// Initializes a new instance of the Random class, using the specified seed value.
/// </summary>
/// <param name="seed"></param>
public LehmerRandom(uint seed)
{
_seed = seed;
}
/// <summary>
/// Returns a non-negative random integer.
/// </summary>
/// <returns>Int32</returns>
public int Next()
{
return GetNextInt(0, int.MaxValue);
}
/// <summary>
/// Returns a non-negative random integer that is less than the specified maximum.
/// </summary>
/// <param name="maxValue">Int32</param>
/// <returns>Int32</returns>
public int Next(int maxValue)
{
return GetNextInt(0, maxValue);
}
/// <summary>
/// Returns a random integer that is within a specified range.
/// </summary>
/// <param name="minValue">Int32</param>
/// <param name="maxValue">Int32</param>
/// <returns>Int32</returns>
public int Next(int minValue, int maxValue)
{
return GetNextInt(minValue, maxValue);
}
/// <summary>
/// Returns a random floating-point number that is greater than or equal to 0.0, and less than 1.0
/// </summary>
/// <returns></returns>
public double NextDouble()
{
return GetNextDouble(0.0, 1.0);
}
/// <summary>
/// Returns a non-negative random floating-point number that is less than the specified maximum.
/// </summary>
/// <param name="maxValue"></param>
/// <returns></returns>
public double NextDouble(double maxValue)
{
return GetNextDouble(0.0, maxValue);
}
/// <summary>
/// Returns a random floating-point number that is within a specified range.
/// </summary>
/// <param name="minValue"></param>
/// <param name="maxValue"></param>
/// <returns></returns>
public double NextDouble(double minValue, double maxValue)
{
return GetNextDouble(minValue, maxValue);
}
/// <summary>
/// Fills the elements of a specified array of bytes with random numbers.
/// </summary>
/// <param name="buffer">The array to be filled with random numbers.</param>
public void NextBytes(byte[] buffer)
{
for (int i = 0; i < buffer.Length; i++)
{
buffer[i] = (byte)Next();
}
}
// Returns a random int and sets the seed for the next pass.
internal int GetNextInt(int minValue, int maxValue)
{
_seed = Rnd(_seed);
return ConvertToIntRange(_seed, minValue, maxValue);
}
// Returns a random double and sets the seed for the next pass.
internal double GetNextDouble(double minValue, double maxValue)
{
_seed = Rnd(_seed);
return ConvertToDoubleRange(_seed, minValue, maxValue);
}
/// <summary>
/// Returns a random integer that is within a specified range, using the specified seed value.
/// </summary>
/// <param name="seed"></param>
/// <param name="minValue"></param>
/// <param name="maxValue"></param>
/// <returns></returns>
public static int RndInt(uint seed, int minValue, int maxValue)
{
return GetInt(seed, minValue, maxValue);
}
/// <summary>
/// Returns a random integer that is within a specified range, using a time-dependent default seed value.
/// </summary>
/// <param name="minValue"></param>
/// <param name="maxValue"></param>
/// <returns></returns>
public static int RndInt(int minValue, int maxValue)
{
return GetInt((uint)System.Environment.TickCount, minValue, maxValue);
}
/// <summary>
/// Returns a random double that is within a specified range, using the specified seed value.
/// </summary>
/// <param name="seed"></param>
/// <param name="minValue"></param>
/// <param name="maxValue"></param>
/// <returns></returns>
public static double RndDouble(uint seed, double minValue, double maxValue)
{
return GetDouble(seed, minValue, maxValue);
}
/// <summary>
/// Returns a random double that is within a specified range, using a time-dependent default seed value.
/// </summary>
/// <param name="minValue"></param>
/// <param name="maxValue"></param>
/// <returns></returns>
public static double RndDouble(double minValue, double maxValue)
{
return GetDouble((uint)System.Environment.TickCount, minValue, maxValue);
}
internal static int GetInt(uint seed, int minValue, int maxValue)
{
return ConvertToIntRange(Rnd(seed), minValue, maxValue);
}
internal static double GetDouble(uint seed, double minValue, double maxValue)
{
return ConvertToDoubleRange(Rnd(seed), minValue, maxValue);
}
// Converts uint to integer within the given range.
internal static int ConvertToIntRange(uint val, int minValue, int maxValue)
{
return (int)(val % (maxValue - minValue) + minValue);
}
// Converts uint to double within the given range.
internal static double ConvertToDoubleRange(uint val, double minValue, double maxValue)
{
return (double)val / uint.MaxValue * (maxValue - minValue) + minValue;
}
// Pseudo-random number generator based on the Lehmer Algorithm
// and javidx9's implementation:
// https://github.com/OneLoneCoder/olcPixelGameEngine/blob/master/Videos/OneLoneCoder_PGE_ProcGen_Universe.cpp
internal static uint Rnd(uint seed)
{
seed += 0xe120fc15;
ulong tmp = (ulong)seed * 0x4a39b70d;
uint m1 = (uint)((tmp >> 32) ^ tmp);
tmp = (ulong)m1 * 0x12fad5c9;
return (uint)((tmp >> 32) ^ tmp);
}
}