* Disabled ancient TerrainEngine.

* Enabled new TerrainModule.  (The king is dead, long live the king!)
* Use the console command: "script terrain save file.r32" / "script terrain load file.r32" to load/save terrain. Now uses the extension to determine file format.
* MANY of the old terrain features do not have a replacement function in the new module yet, this needs to be corrected, but has not been done so far. This being said, the new module is faster and more efficient and should be a good replacement.

14 files changed, 125 insertions, 213 deletions

diff --git a/OpenSim/Region/ClientStack/RegionApplicationBase.cs b/OpenSim/Region/ClientStack/RegionApplicationBase.cs
index 660c3b3..43f630d 100644
--- a/OpenSim/Region/ClientStack/RegionApplicationBase.cs
+++ b/OpenSim/Region/ClientStack/RegionApplicationBase.cs
@@ -126,7 +126,7 @@ namespace OpenSim.Region.ClientStack
             scene.RegisterRegionWithGrid();
 
             scene.PhysicsScene = GetPhysicsScene();
-            scene.PhysicsScene.SetTerrain(scene.Terrain.GetHeights1D());
+            scene.PhysicsScene.SetTerrain(scene.Heightmap.GetFloatsSerialised());
 
             //Master Avatar Setup
             UserProfileData masterAvatar;
diff --git a/OpenSim/Region/Environment/EstateManager.cs b/OpenSim/Region/Environment/EstateManager.cs
index 96baf21..bfa6d59 100644
--- a/OpenSim/Region/Environment/EstateManager.cs
+++ b/OpenSim/Region/Environment/EstateManager.cs
@@ -137,13 +137,10 @@ namespace OpenSim.Region.Environment
         {
             // Water Height
             m_regInfo.EstateSettings.waterHeight = WaterHeight;
-            m_scene.Terrain.watermap.Fill(WaterHeight);
 
             // Terraforming limits
             m_regInfo.EstateSettings.terrainRaiseLimit = TerrainRaiseLimit;
             m_regInfo.EstateSettings.terrainLowerLimit = TerrainLowerLimit;
-            m_scene.Terrain.maxRaise = TerrainRaiseLimit;
-            m_scene.Terrain.minLower = TerrainLowerLimit;
 
             // Time of day / fixed sun
             m_regInfo.EstateSettings.useFixedSun = UseFixedSun;
diff --git a/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs b/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs
index 62074cb..fb83e63 100644
--- a/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs
+++ b/OpenSim/Region/Environment/Interfaces/ITerrainChannel.cs
@@ -34,6 +34,7 @@ namespace OpenSim.Region.Environment.Interfaces
         double this[int x, int y] { get; set; }
         int Width { get; }
         float[] GetFloatsSerialised();
+        double[,] GetDoubles();
         bool Tainted(int x, int y);
     }
 }
diff --git a/OpenSim/Region/Environment/LandManagement/Land.cs b/OpenSim/Region/Environment/LandManagement/Land.cs
index 1c4697c..4c6168d 100644
--- a/OpenSim/Region/Environment/LandManagement/Land.cs
+++ b/OpenSim/Region/Environment/LandManagement/Land.cs
@@ -440,11 +440,11 @@ namespace OpenSim.Region.Environment.LandManagement
                 }
             }
             landData.AABBMin =
-                new LLVector3((float) (min_x*4), (float) (min_y*4),
-                              (float) m_scene.Terrain.GetHeight((min_x*4), (min_y*4)));
+                new LLVector3((float)(min_x * 4), (float)(min_y * 4),
+                              (float)m_scene.Heightmap[(min_x * 4), (min_y * 4)]);
             landData.AABBMax =
-                new LLVector3((float) (max_x*4), (float) (max_y*4),
-                              (float) m_scene.Terrain.GetHeight((max_x*4), (max_y*4)));
+                new LLVector3((float)(max_x * 4), (float)(max_y * 4),
+                              (float)m_scene.Heightmap[(max_x * 4), (max_y * 4)]);
             landData.area = tempArea;
         }
 
diff --git a/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs b/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
index 2cf77ff..7ab1e2b 100644
--- a/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
+++ b/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
@@ -96,6 +96,11 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             return heights;
         }
 
+        public double[,] GetDoubles()
+        {
+            return map;
+        }
+
         public double this[int x, int y]
         {
             get
@@ -104,14 +109,25 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             }
             set
             {
-                taint[x / 16, y / 16] = true;
-                map[x, y] = value;
+                if (map[x, y] != value)
+                {
+                    taint[x / 16, y / 16] = true;
+                    map[x, y] = value;
+                }
             }
         }
 
         public bool Tainted(int x, int y)
         {
-            return taint[x / 16, y / 16];
+            if (taint[x / 16, y / 16] != false)
+            {
+                taint[x / 16, y / 16] = false;
+                return true;
+            }
+            else
+            {
+                return false;
+            }
         }
 
         public TerrainChannel()
@@ -163,6 +179,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
         private Dictionary<string, ITerrainLoader> m_loaders = new Dictionary<string, ITerrainLoader>();
         Scene m_scene;
         ITerrainChannel m_channel;
+        bool m_tainted = false;
         private IConfigSource m_gConfig;
 
         private void InstallDefaultEffects()
@@ -241,6 +258,44 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             }
 
             m_scene.EventManager.OnNewClient += EventManager_OnNewClient;
+            m_scene.EventManager.OnPluginConsole += EventManager_OnPluginConsole;
+            m_scene.EventManager.OnTerrainTick += EventManager_OnTerrainTick;
+        }
+
+        void EventManager_OnTerrainTick()
+        {
+            if (m_tainted)
+            {
+                m_tainted = false;
+                m_scene.PhysicsScene.SetTerrain(m_channel.GetFloatsSerialised());
+                m_scene.SaveTerrain();
+
+                //m_scene.CreateTerrainTexture(true);
+            }
+        }
+
+        void EventManager_OnPluginConsole(string[] args)
+        {
+            if (args[0] == "terrain")
+            {
+                string command = args[1];
+                string param = args[2];
+
+
+                switch (command)
+                {
+                    case "load":
+                        LoadFromFile(param);
+                        SendUpdatedLayerData();
+                        break;
+                    case "save":
+                        SaveToFile(param);
+                        break;
+                    default:
+                        m_log.Warn("Unknown terrain command.");
+                        break;
+                }
+            }
         }
 
         void EventManager_OnNewClient(IClientAPI client)
@@ -248,6 +303,31 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             client.OnModifyTerrain += client_OnModifyTerrain;
         }
 
+        void SendUpdatedLayerData()
+        {
+            bool shouldTaint = false;
+            float[] serialised = m_channel.GetFloatsSerialised();
+            int x, y;
+            for (x = 0; x < m_channel.Width; x += Constants.TerrainPatchSize)
+            {
+                for (y = 0; y < m_channel.Height; y += Constants.TerrainPatchSize)
+                {
+                    if (m_channel.Tainted(x, y))
+                    {
+                        m_scene.ForEachClient(delegate(IClientAPI controller)
+                        {
+                            controller.SendLayerData(x / Constants.TerrainPatchSize, y / Constants.TerrainPatchSize, serialised);
+                        });
+                        shouldTaint = true;
+                    }
+                }
+            }
+            if (shouldTaint)
+            {
+                m_tainted = true;
+            }
+        }
+
         void client_OnModifyTerrain(float height, float seconds, byte size, byte action, float north, float west, float south, float east, IClientAPI remoteClient)
         {
             // Not a good permissions check, if in area mode, need to check the entire area.
@@ -261,11 +341,11 @@ namespace OpenSim.Region.Environment.Modules.Terrain
                         m_painteffects[(StandardTerrainEffects)action].PaintEffect(
                             m_channel, west, south, Math.Pow(size, 2.0), seconds);
 
-                        bool usingTerrainModule = false;
+                        bool usingTerrainModule = true;
 
                         if (usingTerrainModule)
                         {
-                            remoteClient.SendLayerData(m_channel.GetFloatsSerialised());
+                            SendUpdatedLayerData();
                         }
                     }
                     else
@@ -298,11 +378,11 @@ namespace OpenSim.Region.Environment.Modules.Terrain
 
                         m_floodeffects[(StandardTerrainEffects)action].FloodEffect(
                             m_channel, fillArea, Math.Pow(size, 2.0));
-                        bool usingTerrainModule = false;
+                        bool usingTerrainModule = true;
 
                         if (usingTerrainModule)
                         {
-                            remoteClient.SendLayerData(m_channel.GetFloatsSerialised());
+                            SendUpdatedLayerData();
                         }
                     }
                     else
diff --git a/OpenSim/Region/Environment/Modules/TreePopulatorModule.cs b/OpenSim/Region/Environment/Modules/TreePopulatorModule.cs
index edd4286..8aa2223 100644
--- a/OpenSim/Region/Environment/Modules/TreePopulatorModule.cs
+++ b/OpenSim/Region/Environment/Modules/TreePopulatorModule.cs
@@ -205,7 +205,7 @@ namespace OpenSim.Region.Environment.Modules
 
         private void CreateTree(LLVector3 position)
         {
-            position.Z = (float)m_scene.Terrain.heightmap.Get((int)position.X, (int)position.Y);
+            position.Z = (float)m_scene.Heightmap[(int)position.X, (int)position.Y];
 
             SceneObjectGroup tree =
                 m_scene.AddTree(new LLVector3(0.1f, 0.1f, 0.1f),
diff --git a/OpenSim/Region/Environment/Scenes/Scene.PacketHandlers.cs b/OpenSim/Region/Environment/Scenes/Scene.PacketHandlers.cs
index 20154ea..b269e75 100644
--- a/OpenSim/Region/Environment/Scenes/Scene.PacketHandlers.cs
+++ b/OpenSim/Region/Environment/Scenes/Scene.PacketHandlers.cs
@@ -37,29 +37,6 @@ namespace OpenSim.Region.Environment.Scenes
     public partial class Scene
     {
         /// <summary>
-        /// Modifies terrain using the specified information
-        /// </summary>
-        /// <param name="height">The height at which the user started modifying the terrain</param>
-        /// <param name="seconds">The number of seconds the modify button was pressed</param>
-        /// <param name="brushsize">The size of the brush used</param>
-        /// <param name="action">The action to be performed</param>
-        /// <param name="north">Distance from the north border where the cursor is located</param>
-        /// <param name="west">Distance from the west border where the cursor is located</param>
-        public void ModifyTerrain(float height, float seconds, byte brushsize, byte action, float north, float west,
-                                  float south, float east,
-                                  IClientAPI remoteUser)
-        {
-            // Do a permissions check before allowing terraforming.
-            // random users are now no longer allowed to terraform
-            // if permissions are enabled.
-            if (!PermissionsMngr.CanTerraform(remoteUser.AgentId, new LLVector3(north, west, 0)))
-                return;
-
-            //if it wasn't for the permission checking we could have the terrain module directly subscribe to the OnModifyTerrain event
-            Terrain.ModifyTerrain(height, seconds, brushsize, action, north, west, south, east, remoteUser);
-        }
-
-        /// <summary>
         /// 
         /// </summary>
         /// <param name="message"></param>
diff --git a/OpenSim/Region/Environment/Scenes/Scene.cs b/OpenSim/Region/Environment/Scenes/Scene.cs
index 29f1af4..ec1563a 100644
--- a/OpenSim/Region/Environment/Scenes/Scene.cs
+++ b/OpenSim/Region/Environment/Scenes/Scene.cs
@@ -283,9 +283,6 @@ namespace OpenSim.Region.Environment.Scenes
             //m_sceneObjects = new Dictionary<LLUUID, SceneObjectGroup>();
             m_restorePresences = new Dictionary<LLUUID, ScenePresence>();
 
-            m_log.Info("[SCENE]: Creating LandMap");
-            Terrain = new TerrainEngine((int)RegionInfo.RegionLocX, (int)RegionInfo.RegionLocY);
-
             m_httpListener = httpServer;
             m_dumpAssetsToFile = dumpAssetsToFile;
 
@@ -843,43 +840,7 @@ namespace OpenSim.Region.Environment.Scenes
 
         private void UpdateTerrain()
         {
-            if (Terrain.IsTainted() && !Terrain.IsUserStillEditing())
-            {
-                CreateTerrainTexture(true);
-
-                lock (Terrain.heightmap)
-                {
-                    lock (SyncRoot)
-                    {
-                        PhysicsScene.SetTerrain(Terrain.GetHeights1D());
-                    }
-
-                    m_storageManager.DataStore.StoreTerrain(Terrain.GetHeights2DD(), RegionInfo.RegionID);
-
-                    SendTerrainUpdate(true);
-
-                    Terrain.ResetTaint();
-                }
-            }
-        }
-
-        public void SendTerrainUpdate(bool checkForTainted)
-        {
-            float[] terData = Heightmap.GetFloatsSerialised();
-
-            Broadcast(delegate(IClientAPI client)
-            {
-                for (int x = 0; x < 16; x++)
-                {
-                    for (int y = 0; y < 16; y++)
-                    {
-                        if ((!checkForTainted) || (Terrain.IsTainted(x * 16, y * 16)))
-                        {
-                            client.SendLayerData(x, y, terData);
-                        }
-                    }
-                }
-            });
+            EventManager.TriggerTerrainTick();
         }
 
         private void UpdateStorageBackup()
@@ -963,14 +924,9 @@ namespace OpenSim.Region.Environment.Scenes
             mapTexture.Save(fileName, ImageFormat.Jpeg);
         }
 
-        /// <summary>
-        /// Loads a world map from a specified R32 file
-        /// </summary>
-        /// <param name="filename">A working R32 file</param>
-        public void LoadWorldMap(string filename)
+        public void SaveTerrain()
         {
-            Terrain.LoadFromFileF32(filename);
-            Terrain.SaveRevertMap();
+            m_storageManager.DataStore.StoreTerrain(Heightmap.GetDoubles(), RegionInfo.RegionID);
         }
 
         /// <summary>
@@ -984,37 +940,15 @@ namespace OpenSim.Region.Environment.Scenes
                 double[,] map = m_storageManager.DataStore.LoadTerrain(RegionInfo.RegionID);
                 if (map == null)
                 {
-                    if (string.IsNullOrEmpty(m_regInfo.EstateSettings.terrainFile))
-                    {
-                        m_log.Info("[TERRAIN]: No default terrain. Generating a new terrain.");
-                        Terrain.SetDefaultTerrain();
+                    m_log.Info("[TERRAIN]: No default terrain. Generating a new terrain.");
+                    Heightmap = new Modules.Terrain.TerrainChannel();
 
-                        m_storageManager.DataStore.StoreTerrain(Terrain.GetHeights2DD(), RegionInfo.RegionID);
-                    }
-                    else
-                    {
-                        try
-                        {
-                            Terrain.LoadFromFileF32(m_regInfo.EstateSettings.terrainFile);
-                            Terrain *= m_regInfo.EstateSettings.terrainMultiplier;
-                        }
-                        catch
-                        {
-                            m_log.Info("[TERRAIN]: No terrain found in database or default. Generating a new terrain.");
-                            Terrain.SetDefaultTerrain();
-                        }
-                        m_storageManager.DataStore.StoreTerrain(Terrain.GetHeights2DD(), RegionInfo.RegionID);
-                    }
+                    m_storageManager.DataStore.StoreTerrain(Heightmap.GetDoubles(), RegionInfo.RegionID);
                 }
                 else
                 {
-                    // TODO: Install 'GetDefaultTerrainProvider' method here?
                     Heightmap = new Modules.Terrain.TerrainChannel(map);
-                    Terrain.SetHeights2D(map);
                 }
-
-                CreateTerrainTexture(true);
-                //CommsManager.GridService.RegisterRegion(RegionInfo); //hack to update the terrain texture in grid mode so it shows on world map
             }
             catch (Exception e)
             {
@@ -1049,6 +983,8 @@ namespace OpenSim.Region.Environment.Scenes
         /// </summary>
         public void CreateTerrainTexture(bool temporary)
         {
+            //TODOADAM: Move this to TerrainModule
+            /*
             //create a texture asset of the terrain 
             byte[] data = Terrain.WriteJpegImage("defaultstripe.png");
             m_regInfo.EstateSettings.terrainImageID = LLUUID.Random();
@@ -1060,6 +996,7 @@ namespace OpenSim.Region.Environment.Scenes
             asset.Type = 0;
             asset.Temporary = temporary;
             AssetCache.AddAsset(asset);
+            */
         }
 
         #endregion
@@ -1382,7 +1319,6 @@ namespace OpenSim.Region.Environment.Scenes
         {
             client.OnRegionHandShakeReply += SendLayerData;
             //remoteClient.OnRequestWearables += new GenericCall(this.GetInitialPrims);
-            client.OnModifyTerrain += ModifyTerrain;
             // client.OnRequestWearables += InformClientOfNeighbours;
             client.OnAddPrim += AddNewPrim;
             client.OnUpdatePrimGroupPosition += m_innerScene.UpdatePrimPosition;
@@ -2443,7 +2379,7 @@ namespace OpenSim.Region.Environment.Scenes
 
         public double GetLandHeight(int x, int y)
         {
-            return Terrain.GetHeight(x, y);
+            return Heightmap[x, y];
         }
 
         public LLUUID GetLandOwner(float x, float y)
diff --git a/OpenSim/Region/Environment/Scenes/SceneBase.cs b/OpenSim/Region/Environment/Scenes/SceneBase.cs
index 2a2dea1..12635c8 100644
--- a/OpenSim/Region/Environment/Scenes/SceneBase.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneBase.cs
@@ -58,7 +58,7 @@ namespace OpenSim.Region.Environment.Scenes
         protected string m_regionName;
         protected RegionInfo m_regInfo;
 
-        public TerrainEngine Terrain;
+        //public TerrainEngine Terrain;
         public ITerrainChannel Heightmap;
 
         protected EventManager m_eventManager;
@@ -112,16 +112,7 @@ namespace OpenSim.Region.Environment.Scenes
         /// <param name="RemoteClient">Client to send to</param>
         public virtual void SendLayerData(IClientAPI RemoteClient)
         {
-            bool usingTerrainModule = false;
-
-            if (usingTerrainModule)
-            {
-                RemoteClient.SendLayerData(Heightmap.GetFloatsSerialised());
-            }
-            else
-            {
-                RemoteClient.SendLayerData(Terrain.GetHeights1D());
-            }
+            RemoteClient.SendLayerData(Heightmap.GetFloatsSerialised());
         }
 
         #endregion
diff --git a/OpenSim/Region/Environment/Scenes/SceneEvents.cs b/OpenSim/Region/Environment/Scenes/SceneEvents.cs
index ac8f91e..5f8c977 100644
--- a/OpenSim/Region/Environment/Scenes/SceneEvents.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneEvents.cs
@@ -48,6 +48,10 @@ namespace OpenSim.Region.Environment.Scenes
 
         public event ClientMovement OnClientMovement;
 
+        public delegate void OnTerrainTickDelegate();
+
+        public event OnTerrainTickDelegate OnTerrainTick;
+
         public delegate void OnBackupDelegate(IRegionDataStore datastore);
 
         public event OnBackupDelegate OnBackup;
@@ -189,6 +193,7 @@ namespace OpenSim.Region.Environment.Scenes
         private NewGridInstantMessage handlerGridInstantMessageToFriends = null; //OnGridInstantMessageToFriendsModule;
         private ClientClosed handlerClientClosed = null; //OnClientClosed;
         private OnNewPresenceDelegate handlerMakeChildAgent = null; //OnMakeChildAgent;
+        private OnTerrainTickDelegate handlerTerrainTick = null; // OnTerainTick;
 
         public void TriggerOnScriptChangedEvent(uint localID, uint change)
         {
@@ -277,6 +282,14 @@ namespace OpenSim.Region.Environment.Scenes
             }
         }
 
+        public void TriggerTerrainTick()
+        {
+            handlerTerrainTick = OnTerrainTick;
+            if (handlerTerrainTick != null)
+            {
+                handlerTerrainTick();
+            }
+        }
 
         public void TriggerParcelPrimCountAdd(SceneObjectGroup obj)
         {
diff --git a/OpenSim/Region/Environment/Scenes/SceneManager.cs b/OpenSim/Region/Environment/Scenes/SceneManager.cs
index 24f71af..3ad9342 100644
--- a/OpenSim/Region/Environment/Scenes/SceneManager.cs
+++ b/OpenSim/Region/Environment/Scenes/SceneManager.cs
@@ -178,29 +178,8 @@ namespace OpenSim.Region.Environment.Scenes
 
         public bool RunTerrainCmdOnCurrentScene(string[] cmdparams, ref string result)
         {
-            if (m_currentScene == null)
-            {
-                bool success = true;
-                foreach (Scene scene in m_localScenes)
-                {
-                    if (!scene.Terrain.RunTerrainCmd(cmdparams, ref result, scene.RegionInfo.RegionName))
-                    {
-                        success = false;
-                    }
-                    
-                    // Messy way of preventing us printing out the same help text for each scene
-                    if (cmdparams.Length <= 0 || cmdparams[0] == "help")
-                    {
-                        break;
-                    }
-                }
-
-                return success;
-            }
-            else
-            {
-                return m_currentScene.Terrain.RunTerrainCmd(cmdparams, ref result, m_currentScene.RegionInfo.RegionName);
-            }
+            m_log.Warn("Terrain commands have been depreciated.");
+            return false;
         }
 
         public void SendCommandToCurrentSceneScripts(string[] cmdparams)
diff --git a/OpenSim/Region/Examples/SimpleApp/MyWorld.cs b/OpenSim/Region/Examples/SimpleApp/MyWorld.cs
index 66727d9..ef0d4d0 100644
--- a/OpenSim/Region/Examples/SimpleApp/MyWorld.cs
+++ b/OpenSim/Region/Examples/SimpleApp/MyWorld.cs
@@ -54,15 +54,7 @@ namespace SimpleApp
 
         public override void LoadWorldMap()
         {
-            float[] map = new float[65536];
 
-            for (int i = 0; i < 65536; i++)
-            {
-                map[i] = 25f;
-            }
-
-            Terrain.GetHeights1D(map);
-            CreateTerrainTexture(true);
         }
 
         public override void AddNewClient(IClientAPI client, bool child)
diff --git a/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs b/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
index d516aa5..9c7f868 100644
--- a/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
+++ b/OpenSim/Region/ScriptEngine/Common/LSL_BuiltIn_Commands.cs
@@ -1851,61 +1851,7 @@ namespace OpenSim.Region.ScriptEngine.Common
             double dsize;
             if (World.PermissionsMngr.CanTerraform(m_host.OwnerID, new LLVector3(m_host.AbsolutePosition.X, m_host.AbsolutePosition.Y, 0)))
             {
-                switch (brush)
-                {
-                    case 1:
-                        dsize = 2;
-                        break;
-                    case 2:
-                        dsize = 4;
-                        break;
-                    case 3:
-                        dsize = 8;
-                        break;
-                    default:
-                        if (brush < 0)
-                        {
-                            dsize = (double)(-1 * brush);
-                        }
-                        else
-                        {
-                            LSLError("Invalid brush size");
-                            dsize = 0; // Should cease execution, but get unassigned local variable dsize on compile.
-                        }
-                        break;
-                }
-                switch (action)
-                {
-                    case 0:
-                        if (World.Terrain.GetHeight((int)m_host.AbsolutePosition.X, (int)m_host.AbsolutePosition.Y) < m_host.AbsolutePosition.Z)
-                        {
-                            World.Terrain.FlattenTerrain(m_host.AbsolutePosition.X, m_host.AbsolutePosition.Y, dsize, 1);
-                        }
-                        break;
-                    case 1:
-                        if (World.Terrain.GetHeight((int)m_host.AbsolutePosition.X, (int)m_host.AbsolutePosition.Y) < (double)m_host.AbsolutePosition.Z)
-                        {
-                            World.Terrain.RaiseTerrain(m_host.AbsolutePosition.X, m_host.AbsolutePosition.Y, dsize, 0.1);
-                        }
-                        break;
-                    case 2:
-                        if (World.Terrain.GetHeight((int)m_host.AbsolutePosition.X, (int)m_host.AbsolutePosition.Y) > 0)
-                        {
-                            World.Terrain.LowerTerrain(m_host.AbsolutePosition.X, m_host.AbsolutePosition.Y, dsize, 1);
-                        }
-                        break;
-                    case 3:
-                        World.Terrain.SmoothTerrain(m_host.AbsolutePosition.X, m_host.AbsolutePosition.Y, dsize, 1);
-                        break;
-                    case 4:
-                        World.Terrain.NoiseTerrain(m_host.AbsolutePosition.X, m_host.AbsolutePosition.Y, dsize, 1);
-                        break;
-                    case 5:
-                        World.Terrain.RevertTerrain(m_host.AbsolutePosition.X, m_host.AbsolutePosition.Y, dsize, 1);
-                        break;
-                    default:
-                        break;
-                }
+                NotImplemented("llModifyLand");
             }
         }
 
@@ -4162,7 +4108,7 @@ namespace OpenSim.Region.ScriptEngine.Common
 
             if (World.PermissionsMngr.CanTerraform(m_host.OwnerID, new LLVector3(x, y, 0)))
             {
-                World.Terrain.Set(x, y, val);
+                World.Heightmap[x, y] = val;
                 return 1;
             }
             else
@@ -4177,7 +4123,7 @@ namespace OpenSim.Region.ScriptEngine.Common
             if (x > 255 || x < 0 || y > 255 || y < 0)
                 LSLError("osTerrainGetHeight: Coordinate out of bounds");
 
-            return World.Terrain.GetHeight(x, y);
+            return World.Heightmap[x, y];
         }
 
         public int osRegionRestart(double seconds)
diff --git a/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs b/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
index c6feb03..78764fe 100644
--- a/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
+++ b/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
@@ -299,7 +299,7 @@ namespace OpenSim.Region.Terrain
                     {
                         if (IsTainted(x * 16, y * 16))
                         {
-                            bool usingTerrainModule = false;
+                            bool usingTerrainModule = true;
 
                             if (!usingTerrainModule)
                             {