CrowdControl/Assets/Feel/MMTools/Tools/MMHelpers/MMArray.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace MoreMountains.Tools
{
	/// <summary>
	/// Array helpers
	/// </summary>
	public class MMArray : MonoBehaviour
	{
		/// <summary>
		/// Rounds an int to the closest int in an array (array has to be sorted)
		/// </summary>
		/// <param name="value"></param>
		/// <param name="array"></param>
		/// <returns></returns>
		public static int RoundIntToArray(int value, int[] array)
		{
			int min = 0;
			if (array[min] >= value) return array[min];

			int max = array.Length - 1;
			if (array[max] <= value) return array[max];

			while (max - min > 1)
			{
				int mid = (max + min) / 2;

				if (array[mid] == value)
				{
					return array[mid];
				}
				else if (array[mid] < value)
				{
					min = mid;
				}
				else
				{
					max = mid;
				}
			}

			if (array[max] - value <= value - array[min])
			{
				return array[max];
			}
			else
			{
				return array[min];
			}
		}

		/// <summary>
		/// Rounds a float to the closest float in an array (array has to be sorted)
		/// </summary>
		/// <param name="value"></param>
		/// <param name="array"></param>
		/// <returns></returns>
		public static float RoundFloatToArray(float value, float[] array)
		{
			int min = 0;
			if (array[min] >= value) return array[min];

			int max = array.Length - 1;
			if (array[max] <= value) return array[max];

			while (max - min > 1)
			{
				int mid = (max + min) / 2;

				if (array[mid] == value)
				{
					return array[mid];
				}
				else if (array[mid] < value)
				{
					min = mid;
				}
				else
				{
					max = mid;
				}
			}

			if (array[max] - value <= value - array[min])
			{
				return array[max];
			}
			else
			{
				return array[min];
			}

		}
	}
}