This changeset is the step 1 of 2 in refactoring

OpenSim.Region.Environment into a "framework" part and a modules only
part. This first changeset refactors OpenSim.Region.Environment.Scenes,
OpenSim.Region.Environment.Interfaces, and OpenSim.Region.Interfaces
into OpenSim.Region.Framework.{Interfaces,Scenes} leaving only region
modules in OpenSim.Region.Environment.

The next step will be to move region modules up from
OpenSim.Region.Environment.Modules to OpenSim.Region.CoreModules and
then sort out which modules are really core modules and which should
move out to forge.

I've been very careful to NOT BREAK anything. i hope i've
succeeded. as this is the work of a whole week i hope i managed to
keep track with the applied patches of the last week --- could any of
you that did check in stuff have a look at whether it survived? thx!

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;
+                }
+            }
+        }
+    }
+}