From: Mike Pitman <pitman@us.ibm.com>

Below is a patch for the smooth tool. 

I factored out the essential computations and placed it in a 
channel method to work similar to raise and lower. 
It now performs about the same rate as raise and lower.

1 files changed, 3 insertions, 9 deletions

diff --git a/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs b/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
index decbb73..b34ca5e 100644
--- a/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
+++ b/OpenSim/Region/Terrain.BasicTerrain/TerrainEngine.cs
@@ -251,7 +251,6 @@ namespace OpenSim.Region.Terrain
                     //SmoothTerrain(y, x , size, (double)seconds / 5.0);
                     //}
                     //}
-
                     SmoothTerrain(west, north, size, (double) seconds/5.0);
 
                     break;
@@ -1331,14 +1330,9 @@ namespace OpenSim.Region.Terrain
         {
             lock (heightmap)
             {
-                Channel smoothed = heightmap.Copy();
-                smoothed.Smooth(amount);
-
-                Channel mask = new Channel();
-                mask.Raise(rx, ry, size, amount);
-
-                heightmap.Blend(smoothed, mask);
-            }
+                // perform essential computation as a channel method    
+                heightmap.SmoothRegion(rx, ry, size, amount);
+            }   
 
             tainted++;
         }