make outline-making not hang the server

nc_sky_isgen/init.lua

@@ -190,9 +190,9 @@ local function spawn_particles(x,y,z,player)
   local visited = {}
   for n1=0,1 do
     for n2=0,1 do
-      for _,ord1 in ipairs({"x","y","z"}) do
+      minetest.after(0,function() for _,ord1 in ipairs({"x","y","z"}) do
-        for _,ord2 in ipairs({"x","y","z"}) do
+        minetest.after(0,function() for _,ord2 in ipairs({"x","y","z"}) do
-          for _,ord3 in ipairs({"x","y","z"}) do
+          minetest.after(0,function()for _,ord3 in ipairs({"x","y","z"}) do
             if ord2 ~= ord1 and ord3 ~= ord2 and ord3 ~= ord1 then
               for x=mi[ord1],ma[ord1] do
                 local pos = {[ord1]=x}
@@ -212,9 +212,9 @@ local function spawn_particles(x,y,z,player)
                 --end
               end
             end
-          end
+          end end)
-        end
+        end end)
-      end
+      end end)
     end
   end
 end