varregion: add --displacement parameter to 'load oar'.

Adds displacment to all objects and terrain loaded from the oar.
As an example, if you have a 512x512 region and an old 256x256 oar, doing
  load oar --displacement "<128,128,0>" oarFile.oar
will load the object (and terrain) into the middle of the 512x512 region.
If displacement is not specified, 'load oar' works like it always has.
If you have a 5

4 files changed, 81 insertions, 15 deletions

diff --git a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
index d451b9e..d249129 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs
@@ -104,6 +104,11 @@ namespace OpenSim.Region.CoreModules.World.Archiver
         /// </value>
         protected bool m_skipAssets;
 
+        /// <value>
+        /// Displacement added to each object as it is added to the world
+        /// </value>
+        protected Vector3 m_displacement = new Vector3(0f, 0f, 0f);
+
         /// <summary>
         /// Used to cache lookups for valid uuids.
         /// </summary>
@@ -132,7 +137,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
         private IAssetService m_assetService = null;
 
 
-        public ArchiveReadRequest(Scene scene, string loadPath, bool merge, bool skipAssets, Guid requestId)
+        public ArchiveReadRequest(Scene scene, string loadPath, bool merge, bool skipAssets, Vector3 displacement, Guid requestId)
         {
             m_rootScene = scene;
 
@@ -153,6 +158,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
             m_merge = merge;
             m_skipAssets = skipAssets;
             m_requestId = requestId;
+            m_displacement = displacement;
 
             // Zero can never be a valid user id
             m_validUserUuids[UUID.Zero] = false;
@@ -445,6 +451,10 @@ namespace OpenSim.Region.CoreModules.World.Archiver
 
                 SceneObjectGroup sceneObject = serialiser.DeserializeGroupFromXml2(serialisedSceneObject);
 
+                // Happily this does not do much to the object since it hasn't been added to the scene yet
+                sceneObject.AbsolutePosition += m_displacement;
+
+
                 bool isTelehub = (sceneObject.UUID == oldTelehubUUID) && (oldTelehubUUID != UUID.Zero);
 
                 // For now, give all incoming scene objects new uuids.  This will allow scenes to be cloned
@@ -809,7 +819,15 @@ namespace OpenSim.Region.CoreModules.World.Archiver
             ITerrainModule terrainModule = scene.RequestModuleInterface<ITerrainModule>();
 
             MemoryStream ms = new MemoryStream(data);
-            terrainModule.LoadFromStream(terrainPath, ms);
+            if (m_displacement != Vector3.Zero)
+            {
+                Vector2 terrainDisplacement = new Vector2(m_displacement.X, m_displacement.Y);
+                terrainModule.LoadFromStream(terrainPath, terrainDisplacement, ms);
+            }
+            else
+            {
+                terrainModule.LoadFromStream(terrainPath, ms);
+            }
             ms.Close();
 
             m_log.DebugFormat("[ARCHIVER]: Restored terrain {0}", terrainPath);
diff --git a/OpenSim/Region/CoreModules/World/Archiver/ArchiverModule.cs b/OpenSim/Region/CoreModules/World/Archiver/ArchiverModule.cs
index 1be6386..fb694de 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/ArchiverModule.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/ArchiverModule.cs
@@ -33,11 +33,14 @@ using log4net;
 using NDesk.Options;
 using Nini.Config;
 using Mono.Addins;
+
 using OpenSim.Framework;
 using OpenSim.Framework.Console;
 using OpenSim.Region.Framework.Interfaces;
 using OpenSim.Region.Framework.Scenes;
 
+using OpenMetaverse;
+
 namespace OpenSim.Region.CoreModules.World.Archiver
 {
     /// <summary>
@@ -101,9 +104,22 @@ namespace OpenSim.Region.CoreModules.World.Archiver
         {
             bool mergeOar = false;
             bool skipAssets = false;
+            Vector3 displacement = new Vector3(0f, 0f, 0f);
             
-            OptionSet options = new OptionSet().Add("m|merge", delegate (string v) { mergeOar = v != null; });
-            options.Add("s|skip-assets", delegate (string v) { skipAssets = v != null; });
+            OptionSet options = new OptionSet();
+            options.Add("m|merge", delegate (string v) { mergeOar = (v != null); });
+            options.Add("s|skip-assets", delegate (string v) { skipAssets = (v != null); });
+            options.Add("displacement=", delegate (string v) {
+                try
+                {
+                    displacement = v == null ? new Vector3(0f, 0f, 0f) : Vector3.Parse(v);
+                }
+                catch (Exception e)
+                {
+                    m_log.ErrorFormat("[ARCHIVER MODULE] failure parsing displacement");
+                    displacement = new Vector3(0f, 0f, 0f);
+                }
+            });
 
             // Send a message to the region ready module
             /* bluewall* Disable this for the time being
@@ -124,11 +140,11 @@ namespace OpenSim.Region.CoreModules.World.Archiver
 
             if (mainParams.Count > 2)
             {
-                DearchiveRegion(mainParams[2], mergeOar, skipAssets, Guid.Empty);
+                DearchiveRegion(mainParams[2], mergeOar, skipAssets, displacement, Guid.Empty);
             }
             else
             {
-                DearchiveRegion(DEFAULT_OAR_BACKUP_FILENAME, mergeOar, skipAssets, Guid.Empty);
+                DearchiveRegion(DEFAULT_OAR_BACKUP_FILENAME, mergeOar, skipAssets, displacement, Guid.Empty);
             }
         }
 
@@ -198,23 +214,23 @@ namespace OpenSim.Region.CoreModules.World.Archiver
 
         public void DearchiveRegion(string loadPath)
         {
-            DearchiveRegion(loadPath, false, false, Guid.Empty);
+            DearchiveRegion(loadPath, false, false, new Vector3(0f, 0f, 0f), Guid.Empty);
         }
         
-        public void DearchiveRegion(string loadPath, bool merge, bool skipAssets, Guid requestId)
+        public void DearchiveRegion(string loadPath, bool merge, bool skipAssets, Vector3 displacement, Guid requestId)
         {
             m_log.InfoFormat(
                 "[ARCHIVER]: Loading archive to region {0} from {1}", Scene.RegionInfo.RegionName, loadPath);
             
-            new ArchiveReadRequest(Scene, loadPath, merge, skipAssets, requestId).DearchiveRegion();
+            new ArchiveReadRequest(Scene, loadPath, merge, skipAssets, displacement, requestId).DearchiveRegion();
         }
         
         public void DearchiveRegion(Stream loadStream)
         {
-            DearchiveRegion(loadStream, false, false, Guid.Empty);
+            DearchiveRegion(loadStream, false, false, new Vector3(0f, 0f, 0f), Guid.Empty);
         }
         
-        public void DearchiveRegion(Stream loadStream, bool merge, bool skipAssets, Guid requestId)
+        public void DearchiveRegion(Stream loadStream, bool merge, bool skipAssets, Vector3 displacement, Guid requestId)
         {
             new ArchiveReadRequest(Scene, loadStream, merge, skipAssets, requestId).DearchiveRegion();
         }
diff --git a/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs b/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
index eec1cec..c412acb 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
@@ -752,7 +752,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver.Tests
                 byte[] archive = archiveWriteStream.ToArray();
                 MemoryStream archiveReadStream = new MemoryStream(archive);
 
-                m_archiverModule.DearchiveRegion(archiveReadStream, true, false, Guid.Empty);
+                m_archiverModule.DearchiveRegion(archiveReadStream, true, false, new Vector3(0f, 0f, 0f), Guid.Empty);
 
                 SceneObjectPart object1Existing = m_scene.GetSceneObjectPart(part1.Name);
                 Assert.That(object1Existing, Is.Not.Null, "object1 was not present after merge");
diff --git a/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs b/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
index 9766bfe..7bc5e88 100644
--- a/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
+++ b/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
@@ -314,12 +314,18 @@ namespace OpenSim.Region.CoreModules.World.Terrain
             LoadFromStream(filename, URIFetch(pathToTerrainHeightmap));
         }
 
+        public void LoadFromStream(string filename, Stream stream)
+        {
+            Vector2 defaultDisplacement = new Vector2(0f, 0f);
+            LoadFromStream(filename, defaultDisplacement, stream);
+        }
+
         /// <summary>
         /// Loads a terrain file from a stream and installs it in the scene.
         /// </summary>
         /// <param name="filename">Filename to terrain file. Type is determined by extension.</param>
         /// <param name="stream"></param>
-        public void LoadFromStream(string filename, Stream stream)
+        public void LoadFromStream(string filename, Vector2 displacement, Stream stream)
         {
             foreach (KeyValuePair<string, ITerrainLoader> loader in m_loaders)
             {
@@ -330,8 +336,7 @@ namespace OpenSim.Region.CoreModules.World.Terrain
                         try
                         {
                             ITerrainChannel channel = loader.Value.LoadStream(stream);
-                            m_scene.Heightmap = channel;
-                            m_channel = channel;
+                            MergeTerrainIntoExisting(channel, displacement);
                             UpdateRevertMap();
                         }
                         catch (NotImplementedException)
@@ -351,6 +356,33 @@ namespace OpenSim.Region.CoreModules.World.Terrain
             throw new TerrainException(String.Format("unable to load heightmap from file {0}: no loader available for that format", filename));
         }
 
+        private void MergeTerrainIntoExisting(ITerrainChannel channel, Vector2 displacement)
+        {
+            if (displacement == Vector2.Zero)
+            {
+                // If there is no displacement, just use this channel as the new heightmap
+                m_scene.Heightmap = channel;
+                m_channel = channel;
+            }
+            else
+            {
+                // If there is a displacement, we copy the loaded heightmap into the overall region
+                for (int xx = 0; xx < channel.Width; xx++)
+                {
+                    for (int yy = 0; yy < channel.Height; yy++)
+                    {
+                        int dispX = xx + (int)displacement.X;
+                        int dispY = yy + (int)displacement.Y;
+                        if (dispX >= 0 && dispX < m_channel.Width
+                                    && dispY >= 0 && dispY < m_channel.Height)
+                        {
+                            m_channel[dispX, dispY] = channel[xx, yy];
+                        }
+                    }
+                }
+            }
+        }
+
         private static Stream URIFetch(Uri uri)
         {
             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);