CrowdControl/Assets/Feel/MMTools/Tools/MMProcedural/MMGridGenerators/MMGridGeneratorPerlinNoiseGround.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Random = System.Random;

namespace MoreMountains.Tools
{
	/// <summary>
	/// Generates a grid with a ground floor
	/// </summary>
	public class MMGridGeneratorPerlinNoiseGround : MMGridGenerator
	{
		/// <summary>
		/// Generates a grid with a ground floor
		/// </summary>
		/// <param name="width"></param>
		/// <param name="height"></param>
		/// <param name="seed"></param>
		/// <returns></returns>
		public static int[,] Generate(int width, int height, float seed)
		{
			int[,] grid = PrepareGrid(ref width, ref height);
            
			for (int i = 0; i < width; i++)
			{
				int groundHeight = Mathf.FloorToInt((Mathf.PerlinNoise(i, seed) - 0.5f) * height) + (height/2);
				for (int j = groundHeight; j >= 0; j--)
				{
					SetGridCoordinate(grid, i, j, 1);
				}
			}
			return grid;
		}
	}
}