97 lines
3.0 KiB
C#
97 lines
3.0 KiB
C#
using Pcg;
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namespace PkmnLib.Static.Utils;
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/// <summary>
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/// Wrapper interface for getting random numbers.
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/// </summary>
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public interface IRandom
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{
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/// <summary>
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/// Get a random integer between min and max.
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/// </summary>
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/// <param name="min">The minimum value (inclusive).</param>
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/// <param name="max">The maximum value (exclusive).</param>
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/// <returns>A random integer that is greater than or equal to min and less than max.</returns>
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public int GetInt(int min, int max);
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/// <summary>
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/// Get a random integer between 0 and max.
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/// </summary>
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/// <param name="max">The maximum value (exclusive).</param>
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/// <returns>A random integer that is greater than or equal to 0 and less than max.</returns>
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public int GetInt(int max);
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/// <summary>
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/// Get a random integer between 0 and <see cref="int.MaxValue"/>.
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/// </summary>
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/// <returns>A random integer that is greater than or equal to 0 and less than <see cref="int.MaxValue"/>.</returns>
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public int GetInt();
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/// <summary>
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/// Get a random float that is greater than or equal to 0.0 and less than 1.0.
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/// </summary>
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/// <returns>A random float that is greater than or equal to 0.0 and less than 1.0.</returns>
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public float GetFloat();
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/// <summary>
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/// Get a random float that is greater than or equal to min and less than max.
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/// </summary>
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/// <param name="min">The minimum value (inclusive).</param>
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/// <param name="max">The maximum value (exclusive).</param>
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/// <returns>A random float that is greater than or equal to min and less than max.</returns>
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public float GetFloat(float min, float max);
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/// <summary>
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/// Get a random boolean. 50% chance of being true.
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/// </summary>
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public bool GetBool();
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}
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/// <inheritdoc />
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public class RandomImpl : IRandom
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{
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private readonly PcgRandom _random;
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/// <summary>
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/// Creates a new instance that uses the given <see cref="PcgRandom"/> instance as its source of randomness.
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/// </summary>
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public RandomImpl(PcgRandom random)
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{
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_random = random;
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}
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/// <summary>
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/// Creates a new instance that uses the given seed to create a new <see cref="PcgRandom"/> instance.
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/// </summary>
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public RandomImpl(int seed)
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{
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_random = new PcgRandom(seed);
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}
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/// <summary>
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/// Creates a new instance that uses a new <see cref="PcgRandom"/> instance.
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/// </summary>
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public RandomImpl()
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{
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_random = new PcgRandom();
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}
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/// <inheritdoc />
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public int GetInt(int min, int max) => _random.Next(min, max);
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/// <inheritdoc />
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public int GetInt(int max) => _random.Next(max);
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/// <inheritdoc />
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public int GetInt() => _random.Next();
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/// <inheritdoc />
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public float GetFloat() => (float)_random.NextDouble();
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/// <inheritdoc />
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public float GetFloat(float min, float max) => (float)(_random.NextDouble() * (max - min) + min);
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/// <inheritdoc />
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public bool GetBool() => _random.Next(2) == 1;
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} |