Implement terrain merging in TerrainChannel.

Modify archiver to use terrain merging when loading oars.
This makes displacement AND rotation properly work on terrain when loading oars.
Especially useful when loading legacy region oars into large varregions.

OpenSim/Region/CoreModules/World/Archiver/ArchiveReadRequest.cs

@@ -121,7 +121,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
         protected Vector3 m_displacement = Vector3.Zero;
 
         /// <value>
-        /// Rotation to apply to the objects as they are loaded.
+        /// Rotation (in radians) to apply to the objects as they are loaded.
         /// </value>
         protected float m_rotation = 0f;
 
@@ -184,7 +184,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
             m_displacement = options.ContainsKey("displacement") ? (Vector3)options["displacement"] : Vector3.Zero;
             m_rotation = options.ContainsKey("rotation") ? (float)options["rotation"] : 0f;
             m_rotationCenter = options.ContainsKey("rotationCenter") ? (Vector3)options["rotationCenter"] 
-                                : new Vector3(Constants.RegionSize / 2f, Constants.RegionSize / 2f, 0f);
+                                : new Vector3(scene.RegionInfo.RegionSizeX / 2f, scene.RegionInfo.RegionSizeY / 2f, 0f);
 
             // Zero can never be a valid user id
             m_validUserUuids[UUID.Zero] = false;
@@ -454,8 +454,7 @@ namespace OpenSim.Region.CoreModules.World.Archiver
             // Reload serialized prims
             m_log.InfoFormat("[ARCHIVER]: Loading {0} scene objects.  Please wait.", serialisedSceneObjects.Count);
 
-            float angle = (float)(m_rotation / 180.0 * Math.PI);
+            OpenMetaverse.Quaternion rot = OpenMetaverse.Quaternion.CreateFromAxisAngle(0, 0, 1, m_rotation);
-            OpenMetaverse.Quaternion rot = OpenMetaverse.Quaternion.CreateFromAxisAngle(0, 0, 1, angle);
 
             UUID oldTelehubUUID = scene.RegionInfo.RegionSettings.TelehubObject;
 
@@ -483,16 +482,25 @@ namespace OpenSim.Region.CoreModules.World.Archiver
                 // Happily this does not do much to the object since it hasn't been added to the scene yet
                 if (sceneObject.AttachmentPoint == 0)
                 {
-                    if (angle != 0f)
+                    if (m_displacement != Vector3.Zero || m_rotation != 0f)
                     {
+                        Vector3 pos = sceneObject.AbsolutePosition;
+                        if (m_rotation != 0f)
+                        {
+                            // Rotate the object
                             sceneObject.RootPart.RotationOffset = rot * sceneObject.GroupRotation;
-                        Vector3 offset = sceneObject.AbsolutePosition - m_rotationCenter;
+                            // Get object position relative to rotation axis
+                            Vector3 offset = pos - m_rotationCenter;
+                            // Rotate the object position
                             offset *= rot;
-                        sceneObject.AbsolutePosition = m_rotationCenter + offset;
+                            // Restore the object position back to relative to the region
+                            pos = m_rotationCenter + offset;
                         }
                         if (m_displacement != Vector3.Zero)
                         {
-                        sceneObject.AbsolutePosition += m_displacement;
+                            pos += m_displacement;
+                        }
+                        sceneObject.AbsolutePosition = pos;
                     }
                 }
 
@@ -868,10 +876,10 @@ namespace OpenSim.Region.CoreModules.World.Archiver
             ITerrainModule terrainModule = scene.RequestModuleInterface<ITerrainModule>();
 
             MemoryStream ms = new MemoryStream(data);
-            if (m_displacement != Vector3.Zero)
+            if (m_displacement != Vector3.Zero || m_rotation != 0f)
             {
-                Vector2 terrainDisplacement = new Vector2(m_displacement.X, m_displacement.Y);
+                Vector2 rotationCenter = new Vector2(m_rotationCenter.X, m_rotationCenter.Y);
-                terrainModule.LoadFromStream(terrainPath, terrainDisplacement, ms);
+                terrainModule.LoadFromStream(terrainPath, m_displacement, m_rotation, rotationCenter, ms);
             }
             else
             {

OpenSim/Region/CoreModules/World/Archiver/ArchiverModule.cs

@@ -120,19 +120,38 @@ namespace OpenSim.Region.CoreModules.World.Archiver
                 {
                     displacement = v == null ? Vector3.Zero : Vector3.Parse(v);
                 }
-                catch (Exception e)
+                catch
                 {
                     m_log.ErrorFormat("[ARCHIVER MODULE] failure parsing displacement");
-                    displacement = new Vector3(0f, 0f, 0f);
+                    m_log.ErrorFormat("[ARCHIVER MODULE]    Must be represented as vector3: --displacement \"<128,128,0>\"");
+                    return;
                 }
             });
             options.Add("rotation=", delegate (string v) {
-                rotation = float.Parse(v);
+                try
-                rotation = Util.Clamp<float>(rotation, -359f, 359f);
+                {
+                    rotation = v == null ? 0f : float.Parse(v);
+                }
+                catch
+                {
+                    m_log.ErrorFormat("[ARCHIVER MODULE] failure parsing rotation");
+                    m_log.ErrorFormat("[ARCHIVER MODULE]    Must be an angle in degrees between -360 and +360: --rotation 45");
+                    return;
+                }
+                // Convert to radians for internals
+                rotation = Util.Clamp<float>(rotation, -359f, 359f) / 180f * (float)Math.PI;
             });
             options.Add("rotationcenter=", delegate (string v) {
-                // RA 20130119: libomv's Vector2.Parse doesn't work. Need to use vector3 for the moment
+                try
-                rotationCenter = Vector3.Parse(v);
+                {
+                    rotationCenter = v == null ? Vector3.Zero : Vector3.Parse(v);
+                }
+                catch
+                {
+                    m_log.ErrorFormat("[ARCHIVER MODULE] failure parsing rotation displacement");
+                    m_log.ErrorFormat("[ARCHIVER MODULE]    Must be represented as vector3: --rotationcenter \"<128,128,0>\"");
+                    return;
+                }
             });
 
             // Send a message to the region ready module

OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs

@@ -316,8 +316,7 @@ namespace OpenSim.Region.CoreModules.World.Terrain
 
         public void LoadFromStream(string filename, Stream stream)
         {
-            Vector2 defaultDisplacement = new Vector2(0f, 0f);
+            LoadFromStream(filename, Vector3.Zero, 0f, Vector2.Zero, stream);
-            LoadFromStream(filename, defaultDisplacement, stream);
         }
 
         /// <summary>
@@ -325,7 +324,8 @@ namespace OpenSim.Region.CoreModules.World.Terrain
         /// </summary>
         /// <param name="filename">Filename to terrain file. Type is determined by extension.</param>
         /// <param name="stream"></param>
-        public void LoadFromStream(string filename, Vector2 displacement, Stream stream)
+        public void LoadFromStream(string filename, Vector3 displacement,
+                                float radianRotation, Vector2 rotationDisplacement, Stream stream)
         {
             foreach (KeyValuePair<string, ITerrainLoader> loader in m_loaders)
             {
@@ -336,7 +336,7 @@ namespace OpenSim.Region.CoreModules.World.Terrain
                         try
                         {
                             ITerrainChannel channel = loader.Value.LoadStream(stream);
-                            MergeTerrainIntoExisting(channel, displacement);
+                            m_channel.Merge(channel, displacement, radianRotation, rotationDisplacement);
                             UpdateRevertMap();
                         }
                         catch (NotImplementedException)
@@ -356,33 +356,6 @@ 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);

OpenSim/Region/Framework/Interfaces/ITerrainChannel.cs

@@ -26,6 +26,7 @@
  */
 
 using OpenSim.Framework;
+using OpenMetaverse;
 
 namespace OpenSim.Region.Framework.Interfaces
 {
@@ -56,5 +57,7 @@ namespace OpenSim.Region.Framework.Interfaces
         ITerrainChannel MakeCopy();
         string SaveToXmlString();
         void LoadFromXmlString(string data);
+        // Merge some terrain into this channel
+        void Merge(ITerrainChannel newTerrain, Vector3 displacement, float radianRotation, Vector2 rotationDisplacement);
     }
 }

OpenSim/Region/Framework/Interfaces/ITerrainModule.cs

@@ -51,7 +51,7 @@ namespace OpenSim.Region.Framework.Interfaces
         /// </param>
         /// <param name="stream"></param>
         void LoadFromStream(string filename, Stream stream);
-        void LoadFromStream(string filename, Vector2 displacement, Stream stream);
+        void LoadFromStream(string filename, Vector3 displacement, float radianRotation, Vector2 rotationDisplacement, Stream stream);
         void LoadFromStream(string filename, System.Uri pathToTerrainHeightmap);
         /// <summary>
         /// Save a terrain to a stream.

OpenSim/Region/Framework/Scenes/TerrainChannel.cs

@@ -36,6 +36,8 @@ using OpenSim.Data;
 using OpenSim.Framework;
 using OpenSim.Region.Framework.Interfaces;
 
+using OpenMetaverse;
+
 using log4net;
 
 namespace OpenSim.Region.Framework.Scenes
@@ -212,6 +214,76 @@ namespace OpenSim.Region.Framework.Scenes
             sr.Close();
         }
 
+        // ITerrainChannel.Merge
+        public void Merge(ITerrainChannel newTerrain, Vector3 displacement, float radianRotation, Vector2 rotationDisplacement)
+        {
+            for (int xx = 0; xx < newTerrain.Width; xx++)
+            {
+                for (int yy = 0; yy < newTerrain.Height; yy++)
+                {
+                    int dispX = (int)displacement.X;
+                    int dispY = (int)displacement.Y;
+                    float newHeight = (float)newTerrain[xx, yy] + displacement.Z;
+                    if (radianRotation == 0)
+                    {
+                        // If no rotation, place the new height in the specified location
+                        dispX += xx;
+                        dispY += yy;
+                        if (dispX >= 0 && dispX < m_terrainData.SizeX && dispY >= 0 && dispY < m_terrainData.SizeY)
+                        {
+                            m_terrainData[dispX, dispY] = newHeight;
+                        }
+                    }
+                    else
+                    {
+                        // If rotating, we have to smooth the result because the conversion
+                        //    to ints will mean heightmap entries will not get changed
+                        // First compute the rotation location for the new height.
+                        dispX += (int)(rotationDisplacement.X
+                            + ((float)xx - rotationDisplacement.X) * Math.Cos(radianRotation)
+                            - ((float)yy - rotationDisplacement.Y) * Math.Sin(radianRotation) );
+
+                        dispY += (int)(rotationDisplacement.Y
+                            + ((float)xx - rotationDisplacement.X) * Math.Sin(radianRotation)
+                            + ((float)yy - rotationDisplacement.Y) * Math.Cos(radianRotation) );
+
+                        if (dispX >= 0 && dispX < m_terrainData.SizeX && dispY >= 0 && dispY < m_terrainData.SizeY)
+                        {
+                            float oldHeight = m_terrainData[dispX, dispY];
+                            // Smooth the heights around this location if the old height is far from this one
+                            for (int sxx = dispX - 2; sxx < dispX + 2; sxx++)
+                            {
+                                for (int syy = dispY - 2; syy < dispY + 2; syy++)
+                                {
+                                    if (sxx >= 0 && sxx < m_terrainData.SizeX && syy >= 0 && syy < m_terrainData.SizeY)
+                                    {
+                                        if (sxx == dispX && syy == dispY)
+                                        {
+                                            // Set height for the exact rotated point
+                                            m_terrainData[dispX, dispY] = newHeight;
+                                        }
+                                        else
+                                        {
+                                            if (Math.Abs(m_terrainData[sxx, syy] - newHeight) > 1f)
+                                            {
+                                                // If the adjacent height is far off, force it to this height
+                                                m_terrainData[sxx, syy] = newHeight;
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+
+                        if (dispX >= 0 && dispX < m_terrainData.SizeX && dispY >= 0 && dispY < m_terrainData.SizeY)
+                        {
+                            m_terrainData[dispX, dispY] = (float)newTerrain[xx, yy];
+                        }
+                    }
+                }
+            }
+        }
+
         #endregion
 
         public TerrainChannel Copy()