From 7c3bfdd8c902375981892ff364b34e68c5344f91 Mon Sep 17 00:00:00 2001
From: Justin Clarke Casey <jjustincc@googlemail.com>
Date: Tue, 9 Dec 2008 17:00:42 +0000
Subject: [PATCH] * Apply terrain flip patch from
 http://opensimulator.org/mantis/view.php?id=2315 * This allows terrain to be
 flipped on the x or y axis with the command "terrain flip x" (or y) * See
 terrain help from the command prompt * This is in anticipation of change the
 way around in which terrain raw files are imported to match that of Second
 Life (to reduce user confusion and improve useability) * Thanks jonc!

---
 CONTRIBUTORS.txt                              |  3 +-
 .../Modules/World/Terrain/TerrainModule.cs    | 46 +++++++++++++++++++
 2 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 0b1514fcdb..2cd32bc7fb 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -55,6 +55,7 @@ Patches
 * jhurliman
 * jimbo2120 (IBM)
 * John R Sohn (XenReborn)
+* jonc
 * Junta Kohime
 * Kayne
 * Kevin Cozens
@@ -64,6 +65,7 @@ Patches
 * M.Igarashi
 * Mic Bowman
 * mikkopa/_someone - RealXtend
+* Mircea Kitsune
 * nlin
 * nornalbion
 * openlifegrid.com
@@ -80,7 +82,6 @@ Patches
 * Y. Nitta
 * YZh
 * Zha Ewry
-* Mircea Kitsune
 
 
 LSL Devs
diff --git a/OpenSim/Region/Environment/Modules/World/Terrain/TerrainModule.cs b/OpenSim/Region/Environment/Modules/World/Terrain/TerrainModule.cs
index 5646de12c3..c1d6ab2fcc 100644
--- a/OpenSim/Region/Environment/Modules/World/Terrain/TerrainModule.cs
+++ b/OpenSim/Region/Environment/Modules/World/Terrain/TerrainModule.cs
@@ -753,6 +753,47 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain
             CheckForTerrainUpdates();
         }
 
+        private void InterfaceFlipTerrain(Object[] args)
+        {
+            String direction = (String)args[0];
+
+            if( direction.ToLower().StartsWith("y"))
+            {
+                for (int x = 0; x < Constants.RegionSize; x++)
+                {
+                    for (int y = 0; y < Constants.RegionSize / 2; y++)
+                    {
+                        double height = m_channel[x, y];
+                        double flippedHeight = m_channel[x, (int)Constants.RegionSize - 1 - y];
+                        m_channel[x, y] = flippedHeight;
+                        m_channel[x, (int)Constants.RegionSize - 1 - y] = height;
+
+                    }
+                }
+            }
+            else if (direction.ToLower().StartsWith("x"))
+            {
+                for (int y = 0; y < Constants.RegionSize; y++)
+                {
+                    for (int x = 0; x < Constants.RegionSize / 2; x++)
+                    {
+                        double height = m_channel[x, y];
+                        double flippedHeight = m_channel[(int)Constants.RegionSize - 1 - x, y];
+                        m_channel[x, y] = flippedHeight;
+                        m_channel[(int)Constants.RegionSize - 1 - x, y] = height;
+
+                    }
+                }
+            }
+            else
+            {
+                m_log.Error("Unrecognised direction - need x or y");
+            }
+
+
+            CheckForTerrainUpdates();
+        }
+
         private void InterfaceElevateTerrain(Object[] args)
         {
             int x, y;
@@ -911,6 +952,10 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain
             Command revertRegionCommand =
                 new Command("revert", CommandIntentions.COMMAND_HAZARDOUS, InterfaceRevertTerrain, "Loads the revert map terrain into the regions heightmap.");
 
+            Command flipCommand =
+                new Command("flip", CommandIntentions.COMMAND_HAZARDOUS, InterfaceFlipTerrain, "Flips the current terrain about the X or Y axis");
+            flipCommand.AddArgument("direction", "[x|y] the direction to flip the terrain in", "String");
+
             // Debug
             Command showDebugStatsCommand =
                 new Command("stats", CommandIntentions.COMMAND_STATISTICAL, InterfaceShowDebugStats,
@@ -938,6 +983,7 @@ namespace OpenSim.Region.Environment.Modules.World.Terrain
             m_commander.RegisterCommand("newbrushes", experimentalBrushesCommand);
             m_commander.RegisterCommand("stats", showDebugStatsCommand);
             m_commander.RegisterCommand("effect", pluginRunCommand);
+            m_commander.RegisterCommand("flip", flipCommand);
 
             // Add this to our scene so scripts can call these functions
             m_scene.RegisterModuleCommander("Terrain", m_commander);