using UnityEngine;
using System;
using System.Collections;
using System.IO;
public class TerrainManager : MonoBehaviour
{

    public TerrainData terrain;
    float[,] heights;
    // Use this for initialization
    void Start()
    {
        LoadTerrain("assets/textures/planets/intersteller/rocky/heightmaps/rocky4.raw");
    }

    // Update is called once per frame
    void Update()
    {

    }

    void SaveTerrain(string filename)
    {
        float[,] dat = terrain.GetHeights(0, 0, terrain.heightmapWidth, terrain.heightmapHeight);
        FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.ReadWrite);
        BinaryWriter bw = new BinaryWriter(fs);
        for (int i = 0; i < terrain.heightmapWidth; i++)
        {
            for (int j = 0; j < terrain.heightmapHeight; j++)
            {
                bw.Write(dat[i, j]);
            }
        }
        bw.Close();
    }

    void LoadTerrain(string filename)
    {
        float[,] dat = terrain.GetHeights(0, 0, terrain.heightmapWidth, terrain.heightmapHeight);
        FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite);
        BinaryReader br = new BinaryReader(fs);
        br.BaseStream.Seek(0, SeekOrigin.Begin);
        for (int i = 0; i < terrain.heightmapWidth; i++)
        {
            for (int j = 0; j < terrain.heightmapHeight; j++)
            {
                dat[i, j] = (float)br.ReadSingle();
            }
        }
        br.Close();
        terrain.SetHeights(0, 0, dat);
        heights = terrain.GetHeights(50, 50, 1024, 1024);
    }



}