1 files changed, 21 insertions, 0 deletions

diff --git a/OpenSim/Region/Framework/Interfaces/ISimulationDataStore.cs b/OpenSim/Region/Framework/Interfaces/ISimulationDataStore.cs
index 3787ca0..c936a84 100644
--- a/OpenSim/Region/Framework/Interfaces/ISimulationDataStore.cs
+++ b/OpenSim/Region/Framework/Interfaces/ISimulationDataStore.cs
@@ -134,5 +134,26 @@ namespace OpenSim.Region.Framework.Interfaces
         Dictionary<string, string> GetExtra(UUID regionID);
 
         void Shutdown();
+    }

+

+    // The terrain is stored as a blob in the database with a 'revision' field.

+    // Some implementations of terrain storage would fill the revision field with

+    //    the time the terrain was stored. When real revisions were added and this

+    //    feature removed, that left some old entries with the time in the revision

+    //    field.

+    // Thus, if revision is greater than 'RevisionHigh' then terrain db entry is

+    //    left over and it is presumed to be 'Legacy256'.

+    // Numbers are arbitrary and are chosen to to reduce possible mis-interpretation.

+    // If a revision does not match any of these, it is assumed to be Legacy256.

+    public enum DBTerrainRevision

+    {

+        // Terrain is 'double[256,256]'

+        Legacy256 = 11,

+        // Terrain is 'int32, int32, float[,]' where the shorts are X and Y dimensions

+        // The dimensions are presumed to be multiples of 16 and, more likely, multiples of 256.

+        Variable2D = 22,

+        // A revision that is not listed above or any revision greater than this value is 'Legacy256'.

+        RevisionHigh = 1234

     }
+
 }