Level Generator

using UnityEngine;
using System.Collections;


//add this class to any folder
public class LevelGenerator : MonoBehaviour {
    public Vector3 size = new Vector3(10,10,15);
    public Vector3 tileSize = new Vector3(1,1,.68f);

    public int seed = 1;
    public float ruffness = 1f;
    public float amplitude = 1f;

    public GridMap map  ;

    public Tile grassTile;

    public Tile[] tiles;

    public void instantiate() {
        if(map != null) {
            reset(map);
            map.initTestMap(size, (x,y,z) => mapToTile(x,y,z), tileSize);
        }
    }

    public Tile mapToTile(int x, int y, int z) {
        Vector2 vec = new Vector2(x,y) * ruffness + new Vector2(seed, seed);
        float height = Mathf.PerlinNoise(vec.x/size.x, vec.y/size.y);

        if( z <= height * amplitude) {
            var min = Mathf.Min(tiles.Length - 1 , z);
            return tiles[(int) min];
        } else {
            return null;
        }
    }

    public void reset( GridMap map) {
        for (int i = 0; i < map.mapSize.x; i++) {
            for (int j = 0; j < map.mapSize.y; j++) {
                for (int k = 0; k < map.mapSize.z; k++) {
                    if(map[i,j,k] != null)
                        GameObject.DestroyImmediate(map[i,j,k].gameObject);
                }
            }
        }
    }
}