* Implemented 'Revert' channel in Terrain Module.

* Added Revert Area, flood brush.
* Added Revert Sphere, paint brush.

OpenSim/Region/Environment/Modules/Terrain/FloodBrushes/RevertArea.cs

@@ -0,0 +1,60 @@
+/*
+* 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.
+* 
+*/
+using OpenSim.Region.Environment.Interfaces;
+
+namespace OpenSim.Region.Environment.Modules.Terrain.FloodBrushes
+{
+    public class RevertArea : ITerrainFloodEffect
+    {
+        ITerrainChannel m_revertmap;
+
+        public RevertArea(ITerrainChannel revertmap)
+        {
+            m_revertmap = revertmap;
+        }
+
+        #region ITerrainFloodEffect Members
+
+        public void FloodEffect(ITerrainChannel map, bool[,] fillArea, double strength)
+        {
+            int x, y;
+            for (x = 0; x < map.Width; x++)
+            {
+                for (y = 0; y < map.Height; y++)
+                {
+                    if (fillArea[x, y] == true)
+                    {
+                        map[x, y] = (map[x, y] * (1.0 - strength)) + (m_revertmap[x, y] * strength);
+                    }
+                }
+            }
+        }
+
+        #endregion
+    }
+}

OpenSim/Region/Environment/Modules/Terrain/PaintBrushes/RevertSphere.cs

@@ -0,0 +1,75 @@
+/*
+* 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.
+* 
+*/
+using System;
+using OpenSim.Region.Environment.Interfaces;
+
+namespace OpenSim.Region.Environment.Modules.Terrain.PaintBrushes
+{
+    public class RevertSphere : ITerrainPaintableEffect
+    {
+        ITerrainChannel m_revertmap;
+
+        public RevertSphere(ITerrainChannel revertmap)
+        {
+            m_revertmap = revertmap;
+        }
+
+        #region ITerrainPaintableEffect Members
+
+        public void PaintEffect(ITerrainChannel map, double rx, double ry, double strength, double duration)
+        {
+            int x, y;
+            for (x = 0; x < map.Width; x++)
+            {
+                // Skip everything unlikely to be affected
+                if (Math.Abs(x - rx) > strength * 1.1)
+                    continue;
+
+                for (y = 0; y < map.Height; y++)
+                {
+                    // Skip everything unlikely to be affected
+                    if (Math.Abs(y - ry) > strength * 1.1)
+                        continue;
+
+                    // Calculate a sphere and add it to the heighmap
+                    double z = strength;
+                    z *= z;
+                    z -= ((x - rx) * (x - rx)) + ((y - ry) * (y - ry));
+
+                    if (z > 0.0)
+                    {
+                        z *= duration;
+                        map[x, y] += (map[x, y] * (1.0 - z)) + (m_revertmap[x, y] * z);
+                    }
+                }
+            }
+        }
+
+        #endregion
+    }
+}

OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs

@@ -190,6 +190,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
         private Dictionary<string, ITerrainLoader> m_loaders = new Dictionary<string, ITerrainLoader>();
         Scene m_scene;
         ITerrainChannel m_channel;
+        ITerrainChannel m_revert;
         bool m_tainted = false;
         private IConfigSource m_gConfig;
 
@@ -201,6 +202,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             m_painteffects[StandardTerrainEffects.Smooth]   = new PaintBrushes.SmoothSphere();
             m_painteffects[StandardTerrainEffects.Noise]    = new PaintBrushes.NoiseSphere();
             m_painteffects[StandardTerrainEffects.Flatten]  = new PaintBrushes.FlattenSphere();
+            m_painteffects[StandardTerrainEffects.Revert]   = new PaintBrushes.RevertSphere(m_revert);
 
             // Area of effect selection effects
             m_floodeffects[StandardTerrainEffects.Raise]    = new FloodBrushes.RaiseArea();
@@ -208,6 +210,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             m_floodeffects[StandardTerrainEffects.Smooth]   = new FloodBrushes.SmoothArea();
             m_floodeffects[StandardTerrainEffects.Noise]    = new FloodBrushes.NoiseArea();
             m_floodeffects[StandardTerrainEffects.Flatten]  = new FloodBrushes.FlattenArea();
+            m_floodeffects[StandardTerrainEffects.Revert]   = new FloodBrushes.RevertArea(m_revert);
 
             // Filesystem load/save loaders
             m_loaders[".r32"] = new FileLoaders.RAW32();
@@ -218,6 +221,18 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             m_loaders[".jpeg"] = m_loaders[".jpg"];
         }
 
+        public void UpdateRevertMap()
+        {
+            int x, y;
+            for (x = 0; x < m_channel.Width; x++)
+            {
+                for (y = 0; y < m_channel.Height; y++)
+                {
+                    m_revert[x, y] = m_channel[x, y];
+                }
+            }
+        }
+
         public void LoadFromFile(string filename)
         {
             foreach (KeyValuePair<string, ITerrainLoader> loader in m_loaders)
@@ -229,6 +244,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
                         ITerrainChannel channel = loader.Value.LoadFile(filename);
                         m_scene.Heightmap = channel;
                         m_channel = channel;
+                        UpdateRevertMap();
                     }
                     return;
                 }
@@ -266,11 +282,15 @@ namespace OpenSim.Region.Environment.Modules.Terrain
                 {
                     m_channel = new TerrainChannel();
                     m_scene.Heightmap = m_channel;
+                    m_revert = new TerrainChannel();
+                    UpdateRevertMap();
                 }
             }
             else
             {
                 m_channel = m_scene.Heightmap;
+                m_revert = new TerrainChannel();
+                UpdateRevertMap();
             }
 
             m_scene.EventManager.OnNewClient += EventManager_OnNewClient;