1 files changed, 242 insertions, 0 deletions

diff --git a/OpenSim/Region/Framework/Scenes/TerrainChannel.cs b/OpenSim/Region/Framework/Scenes/TerrainChannel.cs
new file mode 100644
index 0000000..55c5181
--- /dev/null
+++ b/OpenSim/Region/Framework/Scenes/TerrainChannel.cs
@@ -0,0 +1,242 @@
+/*
+ * 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 OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+using System;
+using System.Text;
+using System.Xml;
+using System.IO;
+using System.Xml.Serialization;
+
+namespace OpenSim.Region.Framework.Scenes
+{
+    /// <summary>
+    /// A new version of the old Channel class, simplified
+    /// </summary>
+    public class TerrainChannel : ITerrainChannel
+    {
+        private readonly bool[,] taint;
+        private double[,] map;
+
+        public TerrainChannel()
+        {
+            map = new double[Constants.RegionSize, Constants.RegionSize];
+            taint = new bool[Constants.RegionSize / 16,Constants.RegionSize / 16];
+
+            int x;
+            for (x = 0; x < Constants.RegionSize; x++)
+            {
+                int y;
+                for (y = 0; y < Constants.RegionSize; y++)
+                {
+                    map[x, y] = TerrainUtil.PerlinNoise2D(x, y, 2, 0.125) * 10;
+                    double spherFacA = TerrainUtil.SphericalFactor(x, y, Constants.RegionSize / 2.0, Constants.RegionSize / 2.0, 50) * 0.01;
+                    double spherFacB = TerrainUtil.SphericalFactor(x, y, Constants.RegionSize / 2.0, Constants.RegionSize / 2.0, 100) * 0.001;
+                    if (map[x, y] < spherFacA)
+                        map[x, y] = spherFacA;
+                    if (map[x, y] < spherFacB)
+                        map[x, y] = spherFacB;
+                }
+            }
+        }
+
+        public TerrainChannel(double[,] import)
+        {
+            map = import;
+            taint = new bool[import.GetLength(0),import.GetLength(1)];
+        }
+
+        public TerrainChannel(bool createMap)
+        {
+            if (createMap)
+            {
+                map = new double[Constants.RegionSize,Constants.RegionSize];
+                taint = new bool[Constants.RegionSize / 16,Constants.RegionSize / 16];
+            }
+        }
+
+        public TerrainChannel(int w, int h)
+        {
+            map = new double[w,h];
+            taint = new bool[w / 16,h / 16];
+        }
+
+        #region ITerrainChannel Members
+
+        public int Width
+        {
+            get { return map.GetLength(0); }
+        }
+
+        public int Height
+        {
+            get { return map.GetLength(1); }
+        }
+
+        public ITerrainChannel MakeCopy()
+        {
+            TerrainChannel copy = new TerrainChannel(false);
+            copy.map = (double[,]) map.Clone();
+
+            return copy;
+        }
+
+        public float[] GetFloatsSerialised()
+        {
+            // Move the member variables into local variables, calling
+            // member variables 256*256 times gets expensive
+            int w = Width;
+            int h = Height;
+            float[] heights = new float[w * h];
+
+            int i, j; // map coordinates
+            int idx = 0; // index into serialized array
+            for (i = 0; i < h; i++)
+            {
+                for (j = 0; j < w; j++)
+                {
+                    heights[idx++] = (float)map[j, i];
+                }
+            }
+
+            return heights;
+        }
+
+        public double[,] GetDoubles()
+        {
+            return map;
+        }
+
+        public double this[int x, int y]
+        {
+            get { return map[x, y]; }
+            set
+            {
+                // Will "fix" terrain hole problems. Although not fantastically.
+                if (Double.IsNaN(value) || Double.IsInfinity(value))
+                    return;
+
+                if (map[x, y] != value)
+                {
+                    taint[x / 16, y / 16] = true;
+                    map[x, y] = value;
+                }
+            }
+        }
+
+        public bool Tainted(int x, int y)
+        {
+            if (taint[x / 16, y / 16])
+            {
+                taint[x / 16, y / 16] = false;
+                return true;
+            }
+            return false;
+        }
+
+        #endregion
+
+        public TerrainChannel Copy()
+        {
+            TerrainChannel copy = new TerrainChannel(false);
+            copy.map = (double[,]) map.Clone();
+
+            return copy;
+        }
+
+        public string SaveToXmlString()
+        {
+            XmlWriterSettings settings = new XmlWriterSettings();
+            settings.Encoding = Encoding.UTF8;
+            using (StringWriter sw = new StringWriter())
+            {
+                using (XmlWriter writer = XmlWriter.Create(sw, settings))
+                {
+                    WriteXml(writer);
+                }
+                string output = sw.ToString();
+                return output;
+            }
+        }
+
+        private void WriteXml(XmlWriter writer)
+        {
+            writer.WriteStartElement(String.Empty, "TerrainMap", String.Empty);
+            ToXml(writer);
+            writer.WriteEndElement();
+        }
+
+        public void LoadFromXmlString(string data)
+        {
+            StringReader sr = new StringReader(data);
+            XmlTextReader reader = new XmlTextReader(sr);
+            reader.Read();
+
+            ReadXml(reader);
+            reader.Close();
+            sr.Close();
+        }
+
+        private void ReadXml(XmlReader reader)
+        {
+            reader.ReadStartElement("TerrainMap");
+            FromXml(reader);
+        }
+
+        private void ToXml(XmlWriter xmlWriter)
+        {
+            float[] mapData = GetFloatsSerialised();
+            byte[] buffer = new byte[mapData.Length * 4];
+            for (int i = 0; i < mapData.Length; i++)
+            {
+                byte[] value = BitConverter.GetBytes(mapData[i]);
+                Array.Copy(value, 0, buffer, (i * 4), 4);
+            }
+            XmlSerializer serializer = new XmlSerializer(typeof(byte[]));
+            serializer.Serialize(xmlWriter, buffer);
+        }
+
+        private void FromXml(XmlReader xmlReader)
+        {
+            XmlSerializer serializer = new XmlSerializer(typeof(byte[]));
+            byte[] dataArray = (byte[])serializer.Deserialize(xmlReader);
+            int index = 0;
+
+            for (int y = 0; y < Height; y++)
+            {
+                for (int x = 0; x < Width; x++)
+                {
+                    float value;
+                    value = BitConverter.ToSingle(dataArray, index);
+                    index += 4;
+                    this[x, y] = (double)value;
+                }
+            }
+        }
+    }
+}