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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSim Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.IO;
30using System.Text;
31using OpenSim.Region.Environment.Interfaces;
32
33namespace OpenSim.Region.Environment.Modules.World.Terrain.FileLoaders
34{
35 /// <summary>
36 /// Terragen File Format Loader
37 /// Built from specification at
38 /// http://www.planetside.co.uk/terragen/dev/tgterrain.html
39 /// </summary>
40 internal class Terragen : ITerrainLoader
41 {
42 #region ITerrainLoader Members
43
44 public ITerrainChannel LoadFile(string filename)
45 {
46 TerrainChannel retval = new TerrainChannel();
47
48 FileInfo file = new FileInfo(filename);
49 FileStream s = file.Open(FileMode.Open, FileAccess.Read);
50 BinaryReader bs = new BinaryReader(s);
51
52 bool eof = false;
53 if (ASCIIEncoding.ASCII.GetString(bs.ReadBytes(16)) == "TERRAGENTERRAIN ")
54 {
55 // Terragen file
56 while (eof == false)
57 {
58 int w = 256;
59 int h = 256;
60 string tmp = ASCIIEncoding.ASCII.GetString(bs.ReadBytes(4));
61 switch (tmp)
62 {
63 case "SIZE":
64 int sztmp = bs.ReadInt16() + 1;
65 w = sztmp;
66 h = sztmp;
67 bs.ReadInt16();
68 break;
69 case "XPTS":
70 w = bs.ReadInt16();
71 bs.ReadInt16();
72 break;
73 case "YPTS":
74 h = bs.ReadInt16();
75 bs.ReadInt16();
76 break;
77 case "ALTW":
78 eof = true;
79 Int16 heightScale = bs.ReadInt16();
80 Int16 baseHeight = bs.ReadInt16();
81 retval = new TerrainChannel(w, h);
82 int x, y;
83 for (x = 0; x < w; x++)
84 {
85 for (y = 0; y < h; y++)
86 {
87 retval[x, y] = (double) baseHeight + (double) bs.ReadInt16() * (double) heightScale / 65536.0;
88 }
89 }
90 break;
91 default:
92 bs.ReadInt32();
93 break;
94 }
95 }
96 }
97
98 bs.Close();
99 s.Close();
100
101 return retval;
102 }
103
104 public void SaveFile(string filename, ITerrainChannel map)
105 {
106 char[] header = "TERRAGENTERRAIN".ToCharArray();
107 throw new NotImplementedException();
108 }
109
110 public string FileExtension
111 {
112 get { return ".ter"; }
113 }
114
115 public ITerrainChannel LoadFile(string filename, int x, int y, int fileWidth, int fileHeight, int w, int h)
116 {
117 throw new NotImplementedException();
118 }
119
120 #endregion
121
122 public override string ToString()
123 {
124 return "Terragen";
125 }
126 }
127} \ No newline at end of file