* Committing new terrain plugin effects system. Loads DLLs in /bin/Terrain/ as terrain module extensions. Committing sample plugin library.

* prebuild.xml changes.

2 files changed, 153 insertions, 10 deletions

diff --git a/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs b/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
index f758c91..40d4771 100644
--- a/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
+++ b/OpenSim/Region/Environment/Modules/Terrain/TerrainModule.cs
@@ -35,7 +35,6 @@ using Nini.Config;
 using OpenSim.Framework;
 using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.Environment.Modules.ModuleFramework;
-using OpenSim.Region.Environment.Modules.Terrain.Effects;
 using OpenSim.Region.Environment.Modules.Terrain.FileLoaders;
 using OpenSim.Region.Environment.Modules.Terrain.FloodBrushes;
 using OpenSim.Region.Environment.Modules.Terrain.PaintBrushes;
@@ -80,6 +79,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             new Dictionary<StandardTerrainEffects, ITerrainPaintableEffect>();
 
         private ITerrainChannel m_channel;
+        private Dictionary<string, ITerrainEffect> m_plugineffects;
         private ITerrainChannel m_revert;
         private Scene m_scene;
         private bool m_tainted = false;
@@ -135,6 +135,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
         {
             InstallDefaultEffects();
             InstallInterfaces();
+            LoadPlugins();
         }
 
         public void Close()
@@ -184,7 +185,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
                         {
                             m_log.Error(
                                 "[TERRAIN]: Unable to load heightmap, file not found. (A directory permissions error may also cause this)");
-                            throw new Exception(String.Format("unable to load heightmap: file {0} not found (or permissions do not allow access", 
+                            throw new Exception(String.Format("unable to load heightmap: file {0} not found (or permissions do not allow access",
                                                               filename));
                         }
                     }
@@ -194,7 +195,7 @@ namespace OpenSim.Region.Environment.Modules.Terrain
                 }
             }
             m_log.Error("[TERRAIN]: Unable to load heightmap, no file loader availible for that format.");
-            throw new Exception(String.Format("unable to load heightmap from file {0}: no loader available for that format", 
+            throw new Exception(String.Format("unable to load heightmap from file {0}: no loader available for that format",
                                               filename));
         }
 
@@ -222,6 +223,46 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             }
         }
 
+        #region Plugin Loading Methods
+
+        private void LoadPlugins()
+        {
+            m_plugineffects = new Dictionary<string, ITerrainEffect>();
+            // Load the files in the Terrain/ dir
+            string[] files = Directory.GetFiles("Terrain");
+            foreach (string file in files)
+            {
+                m_log.Info("Loading effects in " + file);
+                try
+                {
+                    Assembly library = Assembly.LoadFrom(file);
+                    foreach (Type pluginType in library.GetTypes())
+                    {
+                        try
+                        {
+                            if (pluginType.IsAbstract || pluginType.IsNotPublic)
+                                continue;
+
+                            if (pluginType.GetInterface("ITerrainEffect", false) != null)
+                            {
+                                ITerrainEffect terEffect = (ITerrainEffect) Activator.CreateInstance(library.GetType(pluginType.ToString()));
+                                m_plugineffects.Add(pluginType.Name, terEffect);
+                                m_log.Info("... " + pluginType.Name);
+                            }
+                        }
+                        catch (AmbiguousMatchException)
+                        {
+                        }
+                    }
+                }
+                catch (BadImageFormatException)
+                {
+                }
+            }
+        }
+
+        #endregion
+
         #endregion
 
         /// <summary>
@@ -564,10 +605,31 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             }
         }
 
-        private void InterfacePerformEffectTest(Object[] args)
+        private void InterfaceRunPluginEffect(Object[] args)
         {
-            CookieCutter cookie = new CookieCutter();
-            cookie.RunEffect(m_channel);
+            if ((string) args[0] == "list")
+            {
+                m_log.Info("List of loaded plugins");
+                foreach (KeyValuePair<string, ITerrainEffect> kvp in m_plugineffects)
+                {
+                    m_log.Info(kvp.Key);
+                }
+                return;
+            }
+            if ((string) args[0] == "reload")
+            {
+                LoadPlugins();
+                return;
+            }
+            if (m_plugineffects.ContainsKey((string) args[0]))
+            {
+                m_plugineffects[(string) args[0]].RunEffect(m_channel);
+                CheckForTerrainUpdates();
+            }
+            else
+            {
+                m_log.Warn("No such plugin effect loaded.");
+            }
         }
 
         private void InstallInterfaces()
@@ -634,9 +696,10 @@ namespace OpenSim.Region.Environment.Modules.Terrain
                             "Enables experimental brushes which replace the standard terrain brushes. WARNING: This is a debug setting and may be removed at any time.");
             experimentalBrushesCommand.AddArgument("Enabled?", "true / false - Enable new brushes", "Boolean");
 
-            // Effects
-            Command effectsTestCommand =
-                new Command("test", InterfacePerformEffectTest, "Performs an effects module test");
+            //Plugins
+            Command pluginRunCommand =
+                new Command("effect", InterfaceRunPluginEffect, "Runs a specified plugin effect");
+            pluginRunCommand.AddArgument("name", "The plugin effect you wish to run, or 'list' to see all plugins", "String");
 
             m_commander.RegisterCommand("load", loadFromFileCommand);
             m_commander.RegisterCommand("load-tile", loadFromTileCommand);
@@ -648,8 +711,8 @@ namespace OpenSim.Region.Environment.Modules.Terrain
             m_commander.RegisterCommand("bake", bakeRegionCommand);
             m_commander.RegisterCommand("revert", revertRegionCommand);
             m_commander.RegisterCommand("newbrushes", experimentalBrushesCommand);
-            m_commander.RegisterCommand("test", effectsTestCommand);
             m_commander.RegisterCommand("stats", showDebugStatsCommand);
+            m_commander.RegisterCommand("effect", pluginRunCommand);
 
             // Add this to our scene so scripts can call these functions
             m_scene.RegisterModuleCommander("Terrain", m_commander);
diff --git a/OpenSim/Region/Modules/Terrain/Extensions/DefaultEffects/Effects/ChannelDigger.cs b/OpenSim/Region/Modules/Terrain/Extensions/DefaultEffects/Effects/ChannelDigger.cs
new file mode 100644
index 0000000..2f2c04e
--- /dev/null
+++ b/OpenSim/Region/Modules/Terrain/Extensions/DefaultEffects/Effects/ChannelDigger.cs
@@ -0,0 +1,80 @@
+using System;

+using OpenSim.Region.Environment.Interfaces;

+using OpenSim.Region.Environment.Modules.Terrain;

+using OpenSim.Region.Environment.Modules.Terrain.FloodBrushes;

+

+namespace OpenSim.Region.Modules.Terrain.Extensions.DefaultEffects.Effects

+{

+    public class ChannelDigger : ITerrainEffect

+    {

+        private readonly int num_h = 4;

+        private readonly int num_w = 4;

+

+        private readonly ITerrainFloodEffect raiseFunction = new RaiseArea();

+        private readonly ITerrainFloodEffect smoothFunction = new SmoothArea();

+

+        #region ITerrainEffect Members

+

+        public void RunEffect(ITerrainChannel map)

+        {

+            FillMap(map, 15);

+            BuildTiles(map, 7);

+            SmoothMap(map, 3);

+        }

+

+        #endregion

+

+        private void SmoothMap(ITerrainChannel map, int rounds)

+        {

+            Boolean[,] bitmap = new bool[map.Width,map.Height];

+            for (int x = 0; x < map.Width; x++)

+            {

+                for (int y = 0; y < map.Height; y++)

+                {

+                    bitmap[x, y] = true;

+                }

+            }

+

+            for (int i = 0; i < rounds; i++)

+            {

+                smoothFunction.FloodEffect(map, bitmap, 1.0);

+            }

+        }

+

+        private void FillMap(ITerrainChannel map, double val)

+        {

+            for (int x = 0; x < map.Width; x++)

+                for (int y = 0; y < map.Height; y++)

+                    map[x, y] = val;

+        }

+

+        private void BuildTiles(ITerrainChannel map, double height)

+        {

+            int channelWidth = (int) Math.Floor((map.Width / num_w) * 0.8);

+            int channelHeight = (int) Math.Floor((map.Height / num_h) * 0.8);

+            int channelXOffset = (map.Width / num_w) - channelWidth;

+            int channelYOffset = (map.Height / num_h) - channelHeight;

+

+            for (int x = 0; x < num_w; x++)

+            {

+                for (int y = 0; y < num_h; y++)

+                {

+                    int xoff = ((channelXOffset + channelWidth) * x) + (channelXOffset / 2);

+                    int yoff = ((channelYOffset + channelHeight) * y) + (channelYOffset / 2);

+

+                    Boolean[,] bitmap = new bool[map.Width,map.Height];

+

+                    for (int dx = 0; dx < channelWidth; dx++)

+                    {

+                        for (int dy = 0; dy < channelHeight; dy++)

+                        {

+                            bitmap[dx + xoff, dy + yoff] = true;

+                        }

+                    }

+

+                    raiseFunction.FloodEffect(map, bitmap, height);

+                }

+            }

+        }

+    }

+}
\ No newline at end of file