Don't replace existing nodes in singlenode mapgen

diff --git a/src/mapgen_singlenode.cpp b/src/mapgen_singlenode.cpp
index 04bf02bd1c37fbe5ceb5cbdf5702c920e5a22b62..7fa56eaf14bfbdd015b1bd7f2fe6f32ee619e4c1 100644 (file)
--- a/src/mapgen_singlenode.cpp
+++ b/src/mapgen_singlenode.cpp
@@ -72,13 +72,18 @@ void MapgenSinglenode::makeChunk(BlockMakeData *data) {
        v3s16 node_max = (blockpos_max+v3s16(1,1,1))*MAP_BLOCKSIZE-v3s16(1,1,1);
 
        content_t c_node = ndef->getId("mapgen_singlenode");
-       if(c_node == CONTENT_IGNORE)
+       if (c_node == CONTENT_IGNORE)
                c_node = CONTENT_AIR;
-       for(s16 z=node_min.Z; z<=node_max.Z; z++)
-       for(s16 y=node_min.Y; y<=node_max.Y; y++)
-       for(s16 x=node_min.X; x<=node_max.X; x++)
-       {
-               data->vmanip->setNode(v3s16(x,y,z), MapNode(c_node));
+       
+       MapNode n_node(c_node);
+       int i = 0;
+       
+       for (s16 z=node_min.Z; z<=node_max.Z; z++)
+       for (s16 y=node_min.Y; y<=node_max.Y; y++)
+       for (s16 x=node_min.X; x<=node_max.X; x++) {
+               if (vm->m_data[i].getContent() == CONTENT_IGNORE)
+                       vm->m_data[i] = n_node;
+               i++;
        }
 
        // Add top and bottom side of water to transforming_liquid queue