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/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the OpenSim Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
using System;
using System.IO;
using OpenSim.Region.Environment.Interfaces;
namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
{
public class LLRAW : ITerrainLoader
{
public struct HeightmapLookupValue : IComparable<HeightmapLookupValue>
{
public int Index;
public double Value;
public HeightmapLookupValue(int index, double value)
{
Index = index;
Value = value;
}
public int CompareTo(HeightmapLookupValue val)
{
return Value.CompareTo(val.Value);
}
}
/// <summary>Lookup table to speed up terrain exports</summary>
HeightmapLookupValue[] LookupHeightTable;
public LLRAW()
{
LookupHeightTable = new HeightmapLookupValue[256 * 256];
for (int i = 0; i < 256; i++)
{
for (int j = 0; j < 256; j++)
{
LookupHeightTable[i + (j * 256)] = new HeightmapLookupValue(i + (j * 256), ((double)i * ((double)j / 128.0d)));
}
}
Array.Sort<HeightmapLookupValue>(LookupHeightTable);
}
#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);
int y;
for (y = 0; y < retval.Height; y++)
{
int x;
for (x = 0; x < retval.Width; x++)
{
retval[x, y] = bs.ReadByte() * (bs.ReadByte() / 128.0);
bs.ReadBytes(11); // Advance the stream to next bytes.
}
}
bs.Close();
s.Close();
return retval;
}
public ITerrainChannel LoadFile(string filename, int x, int y, int fileWidth, int fileHeight, int w, int h)
{
throw new NotImplementedException();
}
public void SaveFile(string filename, ITerrainChannel map)
{
FileInfo file = new FileInfo(filename);
FileStream s = file.Open(FileMode.CreateNew, FileAccess.Write);
BinaryWriter binStream = new BinaryWriter(s);
// Output the calculated raw
for (int y = 0; y < map.Height; y++)
{
for (int x = 0; x < map.Width; x++)
{
double t = map[x, y];
int index = 0;
// The lookup table is pre-sorted, so we either find an exact match or
// the next closest (smaller) match with a binary search
index = Array.BinarySearch<HeightmapLookupValue>(LookupHeightTable, new HeightmapLookupValue(0, t));
if (index < 0)
index = ~index - 1;
index = LookupHeightTable[index].Index;
byte red = (byte) (index & 0xFF);
byte green = (byte) ((index >> 8) & 0xFF);
const byte blue = 20;
const byte alpha1 = 0;
const byte alpha2 = 0;
const byte alpha3 = 0;
const byte alpha4 = 0;
const byte alpha5 = 255;
const byte alpha6 = 255;
const byte alpha7 = 255;
const byte alpha8 = 255;
byte alpha9 = red;
byte alpha10 = green;
binStream.Write(red);
binStream.Write(green);
binStream.Write(blue);
binStream.Write(alpha1);
binStream.Write(alpha2);
binStream.Write(alpha3);
binStream.Write(alpha4);
binStream.Write(alpha5);
binStream.Write(alpha6);
binStream.Write(alpha7);
binStream.Write(alpha8);
binStream.Write(alpha9);
binStream.Write(alpha10);
}
}
binStream.Close();
s.Close();
}
public string FileExtension
{
get { return ".raw"; }
}
#endregion
public override string ToString()
{
return "LL/SL RAW";
}
}
}
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