Generate blobs of dirt and gravel in stone

diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index 61718d91088ba1e37ca19c092ab3744bcf1b6d14..ceef9c61085bf4f021493ce1e0f32cc4aea19909 100644 (file)
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -1345,8 +1345,7 @@ void make_block(BlockMakeData *data)
        /*
                Create a block-specific seed
        */
-       /*u32 blockseed = (u32)(data->seed%0x100000000ULL) + full_node_min.Z*38134234
-                       + full_node_min.Y*42123 + full_node_min.X*23;*/
+       u32 blockseed = get_blockseed(data->seed, full_node_min);
        
        /*
                Cache some ground type values for speed
@@ -1444,6 +1443,42 @@ void make_block(BlockMakeData *data)
 #endif
        
        }//timer1
+       
+       /*
+               Add blobs of dirt and gravel underground
+       */
+       {
+       PseudoRandom pr(blockseed+983);
+       for(int i=0; i<volume_nodes/12/12/12; i++){
+               v3s16 size(
+                       pr.range(1, 6),
+                       pr.range(1, 6),
+                       pr.range(1, 6)
+               );
+               v3s16 p0(
+                       pr.range(node_min.X, node_max.X)-size.X/2,
+                       pr.range(node_min.Y, node_max.Y)-size.Y/2,
+                       pr.range(node_min.Z, node_max.Z)-size.Z/2
+               );
+               MapNode n1;
+               if(p0.Y > -32 && pr.range(0,1) == 0)
+                       n1 = MapNode(c_dirt);
+               else
+                       n1 = MapNode(c_gravel);
+               for(int x1=0; x1<size.X; x1++)
+               for(int y1=0; y1<size.Y; y1++)
+               for(int z1=0; z1<size.Z; z1++)
+               {
+                       v3s16 p = p0 + v3s16(x1,y1,z1);
+                       u32 i = vmanip.m_area.index(p);
+                       if(!vmanip.m_area.contains(i))
+                               continue;
+                       if(vmanip.m_data[i].getContent() != c_stone)
+                               continue;
+                       vmanip.m_data[i] = n1;
+               }
+       }
+       }
 
        // Limit dirt flow area by 1 because mud is flown into neighbors.
        assert(central_area_size.X == central_area_size.Z);