Chunk coordinates were being aliased during chunk generation, causing Minecraft to hang. Also fixed player object creation.

Substrate/SubstrateCS/Examples/FlatMap/Program.cs

@@ -13,10 +13,10 @@ namespace FlatMap
         static void Main (string[] args)
         {
             string dest = "F:\\Minecraft\\test";
-            int xmin = -10;
-            int xmax = 10;
-            int zmin = -10;
-            int zmaz = 10;
+            int xmin = -20;
+            int xmax = 20;
+            int zmin = -20;
+            int zmaz = 20;
 
             // This will instantly create any necessary directory structure
             BetaWorld world = BetaWorld.Create(dest);
@@ -24,6 +24,7 @@ namespace FlatMap
 
             // We can set different world parameters
             world.Level.LevelName = "Flatlands";
+            world.Level.SetDefaultPlayer();
 
             // We'll create chunks at chunk coordinates xmin,zmin to xmax,zmax
             for (int xi = xmin; xi < xmax; xi++) {
@@ -33,6 +34,10 @@ namespace FlatMap
                     // written to disk)
                     ChunkRef chunk = cm.CreateChunk(xi, zi);
 
+                    // This will suppress generating caves, ores, and all those
+                    // other goodies.
+                    chunk.IsTerrainPopulated = true;
+
                     // Auto light recalculation is horrifically bad for creating
                     // chunks from scratch, because we're placing thousands
                     // of blocks.  Turn it off.

Substrate/SubstrateCS/Source/Chunk.cs

@@ -106,9 +106,9 @@ namespace Substrate
             level.Add("HeightMap", _heightMap);
             level.Add("Entities", _entities);
             level.Add("TileEntities", _tileEntities);
-            level.Add("LastUpdate", new TagLong());
-            level.Add("xPos", new TagInt());
-            level.Add("zPos", new TagInt());
+            level.Add("LastUpdate", new TagLong(Timestamp()));
+            level.Add("xPos", new TagInt(_cx));
+            level.Add("zPos", new TagInt(_cz));
             level.Add("TerrainPopulated", new TagByte());
 
             _tree = new NBT_Tree();
@@ -799,5 +799,11 @@ namespace Substrate
 
             return Math.Max(light, info.Luminance);
         }
+
+        private int Timestamp ()
+        {
+            DateTime epoch = new DateTime(1970, 1, 1, 0, 0, 0, 0);
+            return (int)((DateTime.UtcNow - epoch).Ticks / (10000L * 1000L));
+        }
     }
 }

Substrate/SubstrateCS/Source/Entity.cs

@@ -97,6 +97,9 @@ namespace Substrate
 
         public UntypedEntity ()
         {
+            _pos = new Vector3();
+            _motion = new Vector3();
+            _rotation = new Orientation();
         }
 
         public UntypedEntity (UntypedEntity e)

Substrate/SubstrateCS/Source/Player.cs

@@ -85,6 +85,10 @@ namespace Substrate
             _dimension = 0;
             _sleeping = 0;
             _sleepTimer = 0;
+
+            Air = 300;
+            //Health = 20;
+            Fire = -20;
         }
 
         public Player (Player p)

Substrate/SubstrateCS/Source/Region.cs

@@ -264,7 +264,10 @@ namespace Substrate
 
             DeleteChunk(lcx, lcz);
 
-            Chunk c = new Chunk(lcx, lcz);
+            int cx = lcx + _rx * ChunkManager.REGION_XLEN;
+            int cz = lcz + _rz * ChunkManager.REGION_ZLEN;
+
+            Chunk c = new Chunk(cx, cz);
             c.Save(GetChunkOutStream(lcx, lcz));
 
             ChunkRef cr = new ChunkRef(this, cache, lcx, lcz);