this is step 2 of 2 of the OpenSim.Region.Environment refactor.

NOTHING has been deleted or moved off to forge at this point.  what
has happened is that OpenSim.Region.Environment.Modules has been split
in two:

- OpenSim.Region.CoreModules: all those modules that are either
  directly or indirectly referenced from  other  OpenSim packages, or
  that provide functionality that the OpenSim developer community
  considers core functionality:

      CoreModules/Agent/AssetTransaction
      CoreModules/Agent/Capabilities
      CoreModules/Agent/TextureDownload
      CoreModules/Agent/TextureSender
      CoreModules/Agent/TextureSender/Tests
      CoreModules/Agent/Xfer
      CoreModules/Avatar/AvatarFactory
      CoreModules/Avatar/Chat/ChatModule
      CoreModules/Avatar/Combat
      CoreModules/Avatar/Currency/SampleMoney
      CoreModules/Avatar/Dialog
      CoreModules/Avatar/Friends
      CoreModules/Avatar/Gestures
      CoreModules/Avatar/Groups
      CoreModules/Avatar/InstantMessage
      CoreModules/Avatar/Inventory
      CoreModules/Avatar/Inventory/Archiver
      CoreModules/Avatar/Inventory/Transfer
      CoreModules/Avatar/Lure
      CoreModules/Avatar/ObjectCaps
      CoreModules/Avatar/Profiles
      CoreModules/Communications/Local
      CoreModules/Communications/REST
      CoreModules/Framework/EventQueue
      CoreModules/Framework/InterfaceCommander
      CoreModules/Hypergrid
      CoreModules/InterGrid
      CoreModules/Scripting/DynamicTexture
      CoreModules/Scripting/EMailModules
      CoreModules/Scripting/HttpRequest
      CoreModules/Scripting/LoadImageURL
      CoreModules/Scripting/VectorRender
      CoreModules/Scripting/WorldComm
      CoreModules/Scripting/XMLRPC
      CoreModules/World/Archiver
      CoreModules/World/Archiver/Tests
      CoreModules/World/Estate
      CoreModules/World/Land
      CoreModules/World/Permissions
      CoreModules/World/Serialiser
      CoreModules/World/Sound
      CoreModules/World/Sun
      CoreModules/World/Terrain
      CoreModules/World/Terrain/DefaultEffects
      CoreModules/World/Terrain/DefaultEffects/bin
      CoreModules/World/Terrain/DefaultEffects/bin/Debug
      CoreModules/World/Terrain/Effects
      CoreModules/World/Terrain/FileLoaders
      CoreModules/World/Terrain/FloodBrushes
      CoreModules/World/Terrain/PaintBrushes
      CoreModules/World/Terrain/Tests
      CoreModules/World/Vegetation
      CoreModules/World/Wind
      CoreModules/World/WorldMap

- OpenSim.Region.OptionalModules: all those modules that are not core
  modules:

      OptionalModules/Avatar/Chat/IRC-stuff
      OptionalModules/Avatar/Concierge
      OptionalModules/Avatar/Voice/AsterixVoice
      OptionalModules/Avatar/Voice/SIPVoice
      OptionalModules/ContentManagementSystem
      OptionalModules/Grid/Interregion
      OptionalModules/Python
      OptionalModules/SvnSerialiser
      OptionalModules/World/NPC
      OptionalModules/World/TreePopulator

1 files changed, 218 insertions, 0 deletions

diff --git a/OpenSim/Region/OptionalModules/ContentManagementSystem/SceneObjectGroupDiff.cs b/OpenSim/Region/OptionalModules/ContentManagementSystem/SceneObjectGroupDiff.cs
new file mode 100644
index 0000000..8957e8f
--- /dev/null
+++ b/OpenSim/Region/OptionalModules/ContentManagementSystem/SceneObjectGroupDiff.cs
@@ -0,0 +1,218 @@
+/*
+ * 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.
+ */
+
+#region Header
+
+// SceneObjectGroupDiff.cs
+// User: bongiojp
+
+#endregion Header
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Drawing;
+
+using OpenMetaverse;
+
+using Nini.Config;
+
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+using OpenSim.Region.Physics.Manager;
+
+using log4net;
+
+namespace OpenSim.Region.OptionalModules.ContentManagement
+{
+    #region Enumerations
+
+    [Flags]
+    public enum Diff
+    {
+        NONE = 0,
+        FACECOLOR = 1,
+        SHAPE = 1<<1,
+        MATERIAL = 1<<2,
+        TEXTURE = 1<<3,
+        SCALE = 1<<4,
+        POSITION = 1<<5,
+        OFFSETPOSITION = 1<<6,
+        ROTATIONOFFSET = 1<<7,
+        ROTATIONALVELOCITY = 1<<8,
+        ACCELERATION = 1<<9,
+        ANGULARVELOCITY = 1<<10,
+        VELOCITY = 1<<11,
+        OBJECTOWNER = 1<<12,
+        PERMISSIONS = 1<<13,
+        DESCRIPTION = 1<<14,
+        NAME = 1<<15,
+        SCRIPT = 1<<16,
+        CLICKACTION = 1<<17,
+        PARTICLESYSTEM = 1<<18,
+        GLOW = 1<<19,
+        SALEPRICE = 1<<20,
+        SITNAME = 1<<21,
+        SITTARGETORIENTATION = 1<<22,
+        SITTARGETPOSITION = 1<<23,
+        TEXT = 1<<24,
+        TOUCHNAME = 1<<25
+    }
+
+    #endregion Enumerations
+
+    public static class Difference
+    {
+        #region Static Fields
+
+        static float TimeToDiff = 0;
+//        private static readonly ILog m_log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
+
+        #endregion Static Fields
+
+        #region Private Methods
+
+        private static bool AreQuaternionsEquivalent(Quaternion first, Quaternion second)
+        {
+            Vector3 firstVector = llRot2Euler(first);
+            Vector3 secondVector = llRot2Euler(second);
+            return AreVectorsEquivalent(firstVector, secondVector);
+        }
+
+        private static bool AreVectorsEquivalent(Vector3 first, Vector3 second)
+        {
+            if (TruncateSignificant(first.X, 2) == TruncateSignificant(second.X, 2)
+               && TruncateSignificant(first.Y, 2) == TruncateSignificant(second.Y, 2)
+               && TruncateSignificant(first.Z, 2) == TruncateSignificant(second.Z, 2)
+               )
+                return true;
+            else
+                return false;
+        }
+
+        // Taken from Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
+        private static double NormalizeAngle(double angle)
+        {
+            angle = angle % (Math.PI * 2);
+            if (angle < 0) angle = angle + Math.PI * 2;
+            return angle;
+        }
+
+        private static int TruncateSignificant(float num, int digits)
+        {
+            return (int) Math.Ceiling((Math.Truncate(num * 10 * digits)/10*digits));
+            // return (int) ((num * (10*digits))/10*digits);
+        }
+
+        // Taken from Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
+        // Also changed the original function from LSL_Types to LL types
+        private static Vector3 llRot2Euler(Quaternion r)
+        {
+            Quaternion t = new Quaternion(r.X * r.X, r.Y * r.Y, r.Z * r.Z, r.W * r.W);
+            double m = (t.X + t.Y + t.Z + t.W);
+            if (m == 0) return new Vector3();
+            double n = 2 * (r.Y * r.W + r.X * r.Z);
+            double p = m * m - n * n;
+            if (p > 0)
+                return new Vector3((float)NormalizeAngle(Math.Atan2(2.0 * (r.X * r.W - r.Y * r.Z), (-t.X - t.Y + t.Z + t.W))),
+                                             (float)NormalizeAngle(Math.Atan2(n, Math.Sqrt(p))),
+                                             (float)NormalizeAngle(Math.Atan2(2.0 * (r.Z * r.W - r.X * r.Y), (t.X - t.Y - t.Z + t.W))));
+            else if (n > 0)
+                return new Vector3(0.0f, (float)(Math.PI / 2), (float)NormalizeAngle(Math.Atan2((r.Z * r.W + r.X * r.Y), 0.5 - t.X - t.Z)));
+            else
+                return new Vector3(0.0f, (float)(-Math.PI / 2), (float)NormalizeAngle(Math.Atan2((r.Z * r.W + r.X * r.Y), 0.5 - t.X - t.Z)));
+        }
+
+        #endregion Private Methods
+
+        #region Public Methods
+
+        /// <summary>
+        /// Compares the attributes (Vectors, Quaternions, Strings, etc.) between two scene object parts
+        /// and returns a Diff bitmask which details what the differences are.
+        /// </summary>
+        public static Diff FindDifferences(SceneObjectPart first, SceneObjectPart second)
+        {
+            Stopwatch x = new Stopwatch();
+            x.Start();
+
+            Diff result = 0;
+
+            // VECTOR COMPARISONS
+            if (!AreVectorsEquivalent(first.Acceleration, second.Acceleration))
+                result |= Diff.ACCELERATION;
+            if (!AreVectorsEquivalent(first.AbsolutePosition, second.AbsolutePosition))
+                result |= Diff.POSITION;
+            if (!AreVectorsEquivalent(first.AngularVelocity, second.AngularVelocity))
+                result |= Diff.ANGULARVELOCITY;
+            if (!AreVectorsEquivalent(first.OffsetPosition, second.OffsetPosition))
+                result |= Diff.OFFSETPOSITION;
+            if (!AreVectorsEquivalent(first.RotationalVelocity, second.RotationalVelocity))
+                result |= Diff.ROTATIONALVELOCITY;
+            if (!AreVectorsEquivalent(first.Scale, second.Scale))
+                result |= Diff.SCALE;
+            if (!AreVectorsEquivalent(first.Velocity, second.Velocity))
+                result |= Diff.VELOCITY;
+
+
+            // QUATERNION COMPARISONS
+            if (!AreQuaternionsEquivalent(first.RotationOffset, second.RotationOffset))
+                result |= Diff.ROTATIONOFFSET;
+
+
+            // MISC COMPARISONS (UUID, Byte)
+            if (first.ClickAction != second.ClickAction)
+                result |= Diff.CLICKACTION;
+            if (first.ObjectOwner != second.ObjectOwner)
+                result |= Diff.OBJECTOWNER;
+
+
+            // STRING COMPARISONS
+            if (first.Description != second.Description)
+                result |= Diff.DESCRIPTION;
+            if (first.Material != second.Material)
+                result |= Diff.MATERIAL;
+            if (first.Name != second.Name)
+                result |= Diff.NAME;
+            if (first.SitName != second.SitName)
+                result |= Diff.SITNAME;
+            if (first.Text != second.Text)
+                result |= Diff.TEXT;
+            if (first.TouchName != second.TouchName)
+                result |= Diff.TOUCHNAME;
+
+            x.Stop();
+            TimeToDiff += x.ElapsedMilliseconds;
+            //m_log.Info("[DIFFERENCES] Time spent diffing objects so far" + TimeToDiff);
+
+            return result;
+        }
+
+        #endregion Public Methods
+    }
+}