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using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using OpenSim.Region.Environment.Modules.Terrain;
using OpenSim.Region.Environment.Interfaces;
namespace OpenSim.Region.Environment.Modules.Terrain.FileLoaders
{
/// <summary>
/// Terragen File Format Loader
/// Built from specification at
/// http://www.planetside.co.uk/terragen/dev/tgterrain.html
/// </summary>
class Terragen : ITerrainLoader
{
private static readonly log4net.ILog m_log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
#region ITerrainLoader Members
public ITerrainChannel LoadFile(string filename)
{
TerrainChannel retval = new TerrainChannel();
FileInfo file = new FileInfo(filename);
FileStream s = file.Open(FileMode.Open, FileAccess.Read);
BinaryReader bs = new BinaryReader(s);
bool eof = false;
if (ASCIIEncoding.ASCII.GetString(bs.ReadBytes(16)) == "TERRAGENTERRAIN")
{
// Terragen file
while (eof == false)
{
int w = 256;
int h = 256;
string tmp = ASCIIEncoding.ASCII.GetString(bs.ReadBytes(4));
switch (tmp)
{
case "SIZE":
int sztmp = bs.ReadInt16() + 1;
w = sztmp;
h = sztmp;
bs.ReadInt16();
break;
case "XPTS":
w = bs.ReadInt16();
bs.ReadInt16();
break;
case "YPTS":
h = bs.ReadInt16();
bs.ReadInt16();
break;
case "ALTW":
eof = true;
Int16 heightScale = bs.ReadInt16();
Int16 baseHeight = bs.ReadInt16();
retval = new TerrainChannel(w, h);
int x, y;
for (x = 0; x < w; x++)
{
for (y = 0; y < h; y++)
{
retval[x, y] = (double)baseHeight + (double)bs.ReadInt16() * (double)heightScale / 65536.0;
}
}
break;
default:
bs.ReadInt32();
break;
}
}
}
bs.Close();
s.Close();
return retval;
}
public void SaveFile(string filename)
{
throw new NotImplementedException();
}
#endregion
}
}
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