New OS scripting functions osSetTerrainTexture and osSetTerrainHeight as originally proposed in SL Jira (https://jira.secondlife.com/browse/SVC-244).

OpenSim/Region/CoreModules/World/Estate/EstateManagementModule.cs

@@ -157,12 +157,18 @@ namespace OpenSim.Region.CoreModules.World.Estate
             sendRegionInfoPacketToAll();
         }
 
-        public void setEstateTerrainBaseTexture(IClientAPI remoteClient, int corner, UUID texture)
+        public void setEstateTerrainBaseTexture(int level, UUID texture)
+        {
+            setEstateTerrainBaseTexture(null, level, texture);
+            sendRegionHandshakeToAll();
+        }
+
+        public void setEstateTerrainBaseTexture(IClientAPI remoteClient, int level, UUID texture)
         {
             if (texture == UUID.Zero)
                 return;
 
-            switch (corner)
+            switch (level)
             {
                 case 0:
                     Scene.RegionInfo.RegionSettings.TerrainTexture1 = texture;
@@ -182,6 +188,11 @@ namespace OpenSim.Region.CoreModules.World.Estate
             sendRegionInfoPacketToAll();
         }
 
+        public void setEstateTerrainTextureHeights(int corner, float lowValue, float highValue)
+        {
+            setEstateTerrainTextureHeights(null, corner, lowValue, highValue);
+        }
+
         public void setEstateTerrainTextureHeights(IClientAPI client, int corner, float lowValue, float highValue)
         {
             switch (corner)

OpenSim/Region/Framework/Interfaces/IEstateModule.cs

@@ -45,5 +45,8 @@ namespace OpenSim.Region.Framework.Interfaces
         /// Tell all clients about the current state of the region (terrain textures, water height, etc.).
         /// </summary>
         void sendRegionHandshakeToAll();
+
+        void setEstateTerrainBaseTexture(int level, UUID texture);
+        void setEstateTerrainTextureHeights(int corner, float lowValue, float highValue);
     }
 }

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/OSSL_Api.cs

@@ -3049,5 +3049,60 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
             return ScriptBaseClass.TRUE;
         }
+
+        /// <summary>
+        /// Sets terrain estate texture
+        /// </summary>
+        /// <param name="level"></param>
+        /// <param name="texture"></param>
+        /// <returns></returns>
+        public void osSetTerrainTexture(int level, LSL_Key texture)
+        {
+            CheckThreatLevel(ThreatLevel.High, "osSetTerrainTexture");
+
+            m_host.AddScriptLPS(1);
+            //Check to make sure that the script's owner is the estate manager/master
+            //World.Permissions.GenericEstatePermission(
+            if (World.Permissions.IsGod(m_host.OwnerID))
+            {
+                if (level < 0 || level > 3)
+                    return;
+
+                UUID textureID = new UUID();
+                if (!UUID.TryParse(texture, out textureID))
+                    return;
+
+                // estate module is required
+                IEstateModule estate = World.RequestModuleInterface<IEstateModule>();
+                if (estate != null)
+                    estate.setEstateTerrainBaseTexture(level, textureID);
+            }
+        }
+
+        /// <summary>
+        /// Sets terrain heights of estate
+        /// </summary>
+        /// <param name="corner"></param>
+        /// <param name="low"></param>
+        /// <param name="high"></param>
+        /// <returns></returns>
+        public void osSetTerrainTextureHeight(int corner, double low, double high)
+        {
+            CheckThreatLevel(ThreatLevel.High, "osSetTerrainTextureHeight");
+
+            m_host.AddScriptLPS(1);
+            //Check to make sure that the script's owner is the estate manager/master
+            //World.Permissions.GenericEstatePermission(
+            if (World.Permissions.IsGod(m_host.OwnerID))
+            {
+                if (corner < 0 || corner > 3)
+                    return;
+
+                // estate module is required
+                IEstateModule estate = World.RequestModuleInterface<IEstateModule>();
+                if (estate != null)
+                    estate.setEstateTerrainTextureHeights(corner, (float)low, (float)high);
+            }
+        }
     }
 }

OpenSim/Region/ScriptEngine/Shared/Api/Interface/IOSSL_Api.cs

@@ -234,5 +234,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
 
         LSL_Integer osInviteToGroup(LSL_Key agentId);
         LSL_Integer osEjectFromGroup(LSL_Key agentId);
+
+        void osSetTerrainTexture(int level, LSL_Key texture);
+        void osSetTerrainTextureHeight(int corner, double low, double high);
     }
 }

OpenSim/Region/ScriptEngine/Shared/Api/Runtime/OSSL_Stub.cs

@@ -878,5 +878,15 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
         {
             return m_OSSL_Functions.osEjectFromGroup(agentId);
         }
+
+        public void osSetTerrainTexture(int level, LSL_Key texture)
+        {
+            m_OSSL_Functions.osSetTerrainTexture(level, texture);
+        }
+
+        public void osSetTerrainTextureHeight(int corner, double low, double high)
+        {
+            m_OSSL_Functions.osSetTerrainTextureHeight(corner, low, high);
+        }
     }
 }