Sync with indev branch, bump version to 0.4.7

RealBadAngel

2013-06-30 8e03d7ded6441b26e9d44102c0cd2ee39f9e90bc

 technic/battery_box_mv.lua

@@ -1,355 +1,338 @@
MV_machines = {}

registered_MV_machines_count=0

function register_MV_machine (string1,string2)
registered_MV_machines_count=registered_MV_machines_count+1
MV_machines[registered_MV_machines_count]={}
MV_machines[registered_MV_machines_count].machine_name=string1
MV_machines[registered_MV_machines_count].machine_type=string2
-- register MV machines here
technic.MV_machines = {}
--local MV_machines = {}
local MV_machines = technic.MV_machines
function register_MV_machine(string1,string2)
   technic.MV_machines[string1] = string2
end

minetest.register_craft({
   output = 'technic:mv_battery_box 1',
   recipe = {
      {'technic:battery_box', 'technic:battery_box', 'technic:battery_box'},
      {'technic:battery_box', 'technic:mv_transformer', 'technic:battery_box'},
      {'', 'technic:mv_cable', ''},
   }
}) 
minetest.register_craft(
   {
      output = 'technic:mv_battery_box 1',
      recipe = {
    {'technic:battery_box', 'technic:battery_box', 'technic:battery_box'},
    {'technic:battery_box', 'technic:mv_transformer', 'technic:battery_box'},
    {'', 'technic:mv_cable', ''},
      }
   })

mv_battery_box_formspec =
   "invsize[8,9;]"..
   "image[1,1;1,2;technic_power_meter_bg.png]"..
   "list[current_name;src;3,1;1,1;]"..
   "image[4,1;1,1;technic_battery_reload.png]"..
   "list[current_name;dst;5,1;1,1;]"..
   "label[0,0;MV_Battery box]"..
   "label[3,0;Charge]"..
   "label[5,0;Discharge]"..
   "label[1,3;Power level]"..
   "list[current_player;main;0,5;8,4;]"
   "invsize[8,9;]"..
   "image[1,1;1,2;technic_power_meter_bg.png]"..
   "list[current_name;src;3,1;1,1;]"..
   "image[4,1;1,1;technic_battery_reload.png]"..
   "list[current_name;dst;5,1;1,1;]"..
   "label[0,0;MV_Battery box]"..
   "label[3,0;Charge]"..
   "label[5,0;Discharge]"..
   "label[1,3;Power level]"..
   "list[current_player;main;0,5;8,4;]"

minetest.register_node("technic:mv_battery_box", {
   description = "MV Battery Box",
   tiles = {"technic_mv_battery_box_top.png", "technic_mv_battery_box_bottom.png", "technic_mv_battery_box_side0.png",
      "technic_mv_battery_box_side0.png", "technic_mv_battery_box_side0.png", "technic_mv_battery_box_side0.png"},
   groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
   sounds = default.node_sound_wood_defaults(),
   technic_mv_power_machine=1,
   last_side_shown=0,
   drop="technic:mv_battery_box",
   on_construct = function(pos)
      local meta = minetest.env:get_meta(pos)
      meta:set_string("infotext", "MV Battery box")
      meta:set_float("technic_mv_power_machine", 1)
      meta:set_string("formspec", battery_box_formspec)
      local inv = meta:get_inventory()
      inv:set_size("src", 1)
      inv:set_size("dst", 1)
      battery_charge = 0
      max_charge = 300000
      last_side_shown=0
      end,	
   can_dig = function(pos,player)
      local meta = minetest.env:get_meta(pos);
      local inv = meta:get_inventory()
      if not inv:is_empty("dst") then
         return false
      elseif not inv:is_empty("src") then
         return false
minetest.register_node(
   "technic:mv_battery_box", {
      description = "MV Battery Box",
      tiles  = {"technic_mv_battery_box_top.png", "technic_mv_battery_box_bottom.png", "technic_mv_battery_box_side0.png",
           "technic_mv_battery_box_side0.png", "technic_mv_battery_box_side0.png", "technic_mv_battery_box_side0.png"},
      groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
      sounds = default.node_sound_wood_defaults(),
      drop   = "technic:mv_battery_box",
      on_construct = function(pos)
         if pos==nil then return end
         local meta = minetest.env:get_meta(pos);
         local inv = meta:get_inventory()
         meta:set_string("infotext", "MV Battery box")
         meta:set_float("technic_mv_power_machine", 1)
         meta:set_string("formspec", battery_box_formspec)
         meta:set_float("internal_EU_buffer", 0)
         meta:set_float("internal_EU_buffer_size", 300000)
         inv:set_size("src", 1)
         inv:set_size("dst", 1)
           end,
      can_dig = function(pos,player)
         if pos==nil then return end
         local meta = minetest.env:get_meta(pos);
         local inv = meta:get_inventory()
         if not inv:is_empty("dst") then
            return false
         elseif not inv:is_empty("src") then
            return false
         end
         return true
      end
      return true
   end,
})
   })


for i=1,8,1 do
minetest.register_node("technic:mv_battery_box"..i, {
   description = "MV Battery Box",
   tiles = {"technic_mv_battery_box_top.png", "technic_mv_battery_box_bottom.png", "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png",
      "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png", "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png", "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png"},
   groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,not_in_creative_inventory=1},
   sounds = default.node_sound_wood_defaults(),
   technic_power_machine=1,
   last_side_shown=0,
   drop="technic:mv_battery_box",
   on_construct = function(pos)
      local meta = minetest.env:get_meta(pos)
      meta:set_string("infotext", "MV Battery box")
      meta:set_float("technic_mv_power_machine", 1)
      meta:set_string("formspec", battery_box_formspec)
      local inv = meta:get_inventory()
      inv:set_size("src", 1)
      inv:set_size("dst", 1)
      battery_charge = 0
      max_charge = 300000
      last_side_shown=0
      end,
   can_dig = function(pos,player)
      local meta = minetest.env:get_meta(pos);
      local inv = meta:get_inventory()
      if not inv:is_empty("dst") then
         return false
      elseif not inv:is_empty("src") then
         return false
      end
      return true
   end,
})
   minetest.register_node(
      "technic:mv_battery_box"..i, {
    description = "MV Battery Box",
    tiles  = {"technic_mv_battery_box_top.png", "technic_mv_battery_box_bottom.png", "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png",
         "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png", "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png", "technic_mv_battery_box_side0.png^technic_power_meter"..i..".png"},
    groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2,not_in_creative_inventory=1},
    sounds = default.node_sound_wood_defaults(),
    drop   = "technic:mv_battery_box",
    on_construct = function(pos)
            if pos==nil then return end
            local meta = minetest.env:get_meta(pos);
            local inv = meta:get_inventory()
            meta:set_string("infotext", "MV Battery box")
            meta:set_float("technic_mv_power_machine", 1)
            meta:set_string("formspec", battery_box_formspec)
            meta:set_float("internal_EU_buffer", 0)
            meta:set_float("internal_EU_buffer_size", 300000)
            inv:set_size("src", 1)
            inv:set_size("dst", 1)
         end,
    can_dig = function(pos,player)
            if pos==nil then return end
            local meta = minetest.env:get_meta(pos);
            local inv = meta:get_inventory()
            if not inv:is_empty("dst") then
          return false
            elseif not inv:is_empty("src") then
          return false
            end
            return true
         end
      })
end

minetest.register_abm(
   {nodenames = {"technic:mv_battery_box","technic:mv_battery_box1","technic:mv_battery_box2","technic:mv_battery_box3","technic:mv_battery_box4",
       "technic:mv_battery_box5","technic:mv_battery_box6","technic:mv_battery_box7","technic:mv_battery_box8"
         },
    interval = 1,
    chance = 1,
    action = function(pos, node, active_object_count, active_object_count_wider)
      local meta       = minetest.env:get_meta(pos)
      local max_charge = 300000 -- Set maximum charge for the device here
      local charge     = meta:get_int("internal_EU_buffer")

MV_nodes_visited = {}


minetest.register_abm({
   nodenames = {"technic:mv_battery_box","technic:mv_battery_box1","technic:mv_battery_box2","technic:mv_battery_box3","technic:mv_battery_box4",
           "technic:mv_battery_box5","technic:mv_battery_box6","technic:mv_battery_box7","technic:mv_battery_box8"
         },
   interval = 1,
   chance = 1,
   action = function(pos, node, active_object_count, active_object_count_wider)
   local meta = minetest.env:get_meta(pos)
   charge= meta:get_int("battery_charge")
   max_charge= 300000
   local i=math.ceil((charge/max_charge)*8)
   if i>8 then i=8 end
   j=meta:get_float("last_side_shown")
   if i~=j then
   if i>0 then hacky_swap_node(pos,"technic:mv_battery_box"..i)  
   elseif i==0 then hacky_swap_node(pos,"technic:mv_battery_box") end 
   meta:set_float("last_side_shown",i)
   end

--loading registered power tools
   local inv = meta:get_inventory()
   if inv:is_empty("src")==false  then 
      local srcstack = inv:get_stack("src", 1)
      local src_item=srcstack:to_table()
      local src_meta=get_item_meta(src_item["metadata"])

      local item_max_charge=nil
      for i=1,registered_power_tools_count,1 do
         if power_tools[i].tool_name==src_item["name"] then
            src_meta=get_item_meta(src_item["metadata"])
            if src_meta==nil then 
               src_meta={}
               src_meta["technic_power_tool"]=true
               src_meta["charge"]=0
            else 
               if src_meta["technic_power_tool"]==nil then
                  src_meta["technic_power_tool"]=true
                  src_meta["charge"]=0
               end
            end
            item_max_charge=power_tools[i].max_charge
         end
      end
		
      if item_max_charge then
         load1=src_meta["charge"] 
         load_step=4000
         if load1<item_max_charge and charge>0 then 
            if charge-load_step<0 then load_step=charge end
            if load1+load_step>item_max_charge then load_step=item_max_charge-load1 end
            load1=load1+load_step
            charge=charge-load_step
            set_RE_wear(src_item,load1,item_max_charge)
            src_meta["charge"]=load1
            src_item["metadata"]=set_item_meta(src_meta)
            inv:set_stack("src", 1, src_item)
         end
         meta:set_int("battery_charge",charge)
      end	
   end
	
-- dischargin registered power tools
      if inv:is_empty("dst") == false then 
      srcstack = inv:get_stack("dst", 1)
      src_item=srcstack:to_table()
      local src_meta=get_item_meta(src_item["metadata"])
      local item_max_charge=nil
      for i=1,registered_power_tools_count,1 do
         if power_tools[i].tool_name==src_item["name"] then
            src_meta=get_item_meta(src_item["metadata"])
            if src_meta==nil then 
               src_meta={}
               src_meta["technic_power_tool"]=true
               src_meta["charge"]=0
            else 
               if src_meta["technic_power_tool"]==nil then
                  src_meta["technic_power_tool"]=true
                  src_meta["charge"]=0
               end
            end
            item_max_charge=power_tools[i].max_charge
         end
      -- Select node textures
      local i = math.ceil((charge/max_charge)*8)
      if i > 8 then i = 8 end
      local j = meta:get_float("last_side_shown")
      if i~=j then
         if i>0 then hacky_swap_node(pos,"technic:mv_battery_box"..i)
         elseif i==0 then hacky_swap_node(pos,"technic:mv_battery_box") end
         meta:set_float("last_side_shown",i)
      end

      if item_max_charge then
      local load1=src_meta["charge"] 
      load_step=4000
      if load1>0 and charge<max_charge then 
          if charge+load_step>max_charge then load_step=max_charge-charge end
            if load1-load_step<0 then load_step=load1 end
      load1=load1-load_step
      charge=charge+load_step
      set_RE_wear(src_item,load1,item_max_charge)
      src_meta["charge"]=load1
      src_item["metadata"]=set_item_meta(src_meta)
      inv:set_stack("dst", 1, src_item)
      end		
      end
      end
		
   meta:set_int("battery_charge",charge)
      --charge registered power tools
      local inv = meta:get_inventory()
      if inv:is_empty("src")==false  then
         local srcstack = inv:get_stack("src", 1)
         local src_item=srcstack:to_table()
         local src_meta=get_item_meta(src_item["metadata"])

   local load = math.floor((charge/300000) * 100)
   meta:set_string("formspec",
         -- Power tools should really be made into a hash table to avoid linear search. But the list is short so okay...
         for i=1,registered_power_tools_count,1 do
            if power_tools[i].tool_name==src_item["name"] then
          -- What is this code doing? Setting tool properties if not set already????
          src_meta=get_item_meta(src_item["metadata"])
          if src_meta==nil then
             src_meta={}
             src_meta["technic_power_tool"]=true
             src_meta["charge"]=0
          else
             if src_meta["technic_power_tool"]==nil then
                src_meta["technic_power_tool"]=true
                src_meta["charge"]=0
             end
          end
          -- Do the charging
          local item_max_charge = power_tools[i].max_charge
          local load1           = src_meta["charge"]
          local load_step       = 4000 -- how much to charge per tick
          if load1<item_max_charge and charge>0 then
             if charge-load_step<0 then load_step=charge end
             if load1+load_step>item_max_charge then load_step=item_max_charge-load1 end
             load1=load1+load_step
             charge=charge-load_step
             set_RE_wear(src_item,load1,item_max_charge)
             src_meta["charge"]   = load1
             src_item["metadata"] = set_item_meta(src_meta)
             inv:set_stack("src", 1, src_item)
          end
          meta:set_int("internal_EU_buffer",charge)
          break
            end
         end
      end

      -- discharging registered power tools
      if inv:is_empty("dst") == false then
         srcstack = inv:get_stack("dst", 1)
         src_item=srcstack:to_table()
         local src_meta=get_item_meta(src_item["metadata"])
         local item_max_charge=nil
         for i=1,registered_power_tools_count,1 do
            if power_tools[i].tool_name==src_item["name"] then
          src_meta=get_item_meta(src_item["metadata"])
          if src_meta==nil then
             src_meta={}
             src_meta["technic_power_tool"]=true
             src_meta["charge"]=0
          else
             if src_meta["technic_power_tool"]==nil then
                src_meta["technic_power_tool"]=true
                src_meta["charge"]=0
             end
          end
          local item_max_charge = power_tools[i].max_charge
          local load1           = src_meta["charge"]
          local load_step       = 4000 -- how much to discharge per tick
          if load1>0 and charge<max_charge then
             if charge+load_step>max_charge then load_step=max_charge-charge end
             if load1-load_step<0 then load_step=load1 end
             load1=load1-load_step
             charge=charge+load_step
             set_RE_wear(src_item,load1,item_max_charge)
             src_meta["charge"]=load1
             src_item["metadata"]=set_item_meta(src_meta)
             inv:set_stack("dst", 1, src_item)
          end
          meta:set_int("internal_EU_buffer",charge)
          break
            end
         end
      end

      local load = math.floor((charge/300000) * 100)
      meta:set_string("formspec",
            mv_battery_box_formspec..
            "image[1,1;1,2;technic_power_meter_bg.png^[lowpart:"..
                  (load)..":technic_power_meter_fg.png]"
            )
		
   local pos1={}
               "image[1,1;1,2;technic_power_meter_bg.png^[lowpart:"..
               (load)..":technic_power_meter_fg.png]"
              )

   pos1.y=pos.y-1
   pos1.x=pos.x
   pos1.z=pos.z
      -- Next index the surrounding network the get the producers and receivers on the power grid
      local pos1 = {}
      pos1.y = pos.y-1
      pos1.x = pos.x
      pos1.z = pos.z


   meta1 = minetest.env:get_meta(pos1)
   if meta1:get_float("mv_cablelike")~=1 then return end
      meta1 = minetest.env:get_meta(pos1)
      if meta1:get_float("mv_cablelike")~=1 then return end

      local MV_nodes = {}
      local PR_nodes = {}
      local RE_nodes = {}
      local BA_nodes = {}

       MV_nodes[1]={}
       MV_nodes[1].x=pos1.x
      MV_nodes[1].y=pos1.y
      MV_nodes[1].z=pos1.z
      MV_nodes[1].visited=false
	
table_index=1
   repeat
   check_MV_node (PR_nodes,RE_nodes,MV_nodes,table_index)
   table_index=table_index+1
   if MV_nodes[table_index]==nil then break end
   until false
      MV_nodes[1]   = {}
      MV_nodes[1].x = pos1.x
      MV_nodes[1].y = pos1.y
      MV_nodes[1].z = pos1.z

      local table_index=1
      repeat
         check_MV_node(PR_nodes,RE_nodes,BA_nodes,MV_nodes,table_index)
         table_index=table_index+1
         if MV_nodes[table_index]==nil then break end
      until false

local pos1={}
i=1
   repeat
   if PR_nodes[i]==nil then break end -- gettin power from all connected producers
      pos1.x=PR_nodes[i].x
      pos1.y=PR_nodes[i].y
      pos1.z=PR_nodes[i].z
   local meta1 = minetest.env:get_meta(pos1)
   local internal_EU_buffer=meta1:get_float("internal_EU_buffer")
   if charge<max_charge then 
   charge_to_take=1000	
   if internal_EU_buffer-charge_to_take<=0 then
      charge_to_take=internal_EU_buffer
   end
   if charge_to_take>0 then 
   charge=charge+charge_to_take 
   internal_EU_buffer=internal_EU_buffer-charge_to_take
   meta1:set_float("internal_EU_buffer",internal_EU_buffer)
   end
   end
   i=i+1
   until false
      -- Get power from all connected producers
      local pr_pos
                for _,pr_pos in ipairs(PR_nodes) do
         local meta1              = minetest.env:get_meta(pr_pos)
         local internal_EU_buffer = meta1:get_float("internal_EU_buffer")
         local charge_to_take     = 1000
         if charge<max_charge then
            if internal_EU_buffer-charge_to_take<=0 then
          charge_to_take=internal_EU_buffer
            end
            if charge_to_take>0 then
          charge=charge+charge_to_take
          internal_EU_buffer=internal_EU_buffer-charge_to_take
          meta1:set_float("internal_EU_buffer",internal_EU_buffer)
            end
         end
      end

if charge>max_charge then charge=max_charge end
      if charge>max_charge then charge=max_charge end

i=1
   repeat
   if RE_nodes[i]==nil then break end
      pos1.x=RE_nodes[i].x         -- loading all conected machines buffers
      pos1.y=RE_nodes[i].y
      pos1.z=RE_nodes[i].z
   local meta1 = minetest.env:get_meta(pos1)
   local internal_EU_buffer=meta1:get_float("internal_EU_buffer")
   local internal_EU_buffer_size=meta1:get_float("internal_EU_buffer_size")
      -- Provide power to all connected receivers
      local re_pos
                for _,re_pos in ipairs(RE_nodes) do
         local meta1                   = minetest.env:get_meta(re_pos)
         local internal_EU_buffer      = meta1:get_float("internal_EU_buffer")
         local internal_EU_buffer_size = meta1:get_float("internal_EU_buffer_size")
         local charge_to_give          = math.min(1000, charge/table.getn(RE_nodes))
         if internal_EU_buffer+charge_to_give>internal_EU_buffer_size then
            charge_to_give=internal_EU_buffer_size-internal_EU_buffer
         end
         if charge-charge_to_give<0 then charge_to_give=charge end

   local charge_to_give=1000
   if internal_EU_buffer+charge_to_give>internal_EU_buffer_size then
      charge_to_give=internal_EU_buffer_size-internal_EU_buffer
   end
   if charge-charge_to_give<0 then charge_to_give=charge end
         internal_EU_buffer=internal_EU_buffer+charge_to_give
         meta1:set_float("internal_EU_buffer",internal_EU_buffer)
         charge=charge-charge_to_give;
      end
      charge=math.floor(charge)
      meta:set_string("infotext", "MV Battery box: "..charge.."/"..max_charge);
      meta:set_int("internal_EU_buffer",charge)
        end
 })

   internal_EU_buffer=internal_EU_buffer+charge_to_give
   meta1:set_float("internal_EU_buffer",internal_EU_buffer)
   charge=charge-charge_to_give;
	
   i=i+1
   until false
   charge=math.floor(charge)
   charge_string=tostring(charge)
   meta:set_string("infotext", "Battery box: "..charge_string.."/"..max_charge);
   meta:set_int("battery_charge",charge)

-- Register as a battery type
-- Battery type machines function as power reservoirs and can both receive and give back power
register_MV_machine("technic:mv_battery_box","BA")
for i=1,8,1 do
   register_MV_machine("technic:mv_battery_box"..i,"BA")
end
})

function add_new_MVcable_node (MV_nodes,pos1)
local i=1
   repeat
      if MV_nodes[i]==nil then break end
      if pos1.x==MV_nodes[i].x and pos1.y==MV_nodes[i].y and pos1.z==MV_nodes[i].z then return false end
      i=i+1
   until false
MV_nodes[i]={}
MV_nodes[i].x=pos1.x
MV_nodes[i].y=pos1.y
MV_nodes[i].z=pos1.z
MV_nodes[i].visited=false
return true
   if MV_nodes == nil then return true end
   local i=1
   repeat
      if MV_nodes[i]==nil then break end
      if pos1.x==MV_nodes[i].x and pos1.y==MV_nodes[i].y and pos1.z==MV_nodes[i].z then return false end
      i=i+1
   until false
   MV_nodes[i]={}
   MV_nodes[i].x=pos1.x
   MV_nodes[i].y=pos1.y
   MV_nodes[i].z=pos1.z
   return true
end

function check_MV_node (PR_nodes,RE_nodes,MV_nodes,i)
      local pos1={}
      pos1.x=MV_nodes[i].x
      pos1.y=MV_nodes[i].y
      pos1.z=MV_nodes[i].z
      MV_nodes[i].visited=true
      new_node_added=false
	
      pos1.x=pos1.x+1
      check_MV_node_subp (PR_nodes,RE_nodes,MV_nodes,pos1)
      pos1.x=pos1.x-2
      check_MV_node_subp (PR_nodes,RE_nodes,MV_nodes,pos1)
      pos1.x=pos1.x+1
		
      pos1.y=pos1.y+1
      check_MV_node_subp (PR_nodes,RE_nodes,MV_nodes,pos1)
      pos1.y=pos1.y-2
      check_MV_node_subp (PR_nodes,RE_nodes,MV_nodes,pos1)
      pos1.y=pos1.y+1
function check_MV_node(PR_nodes,RE_nodes,BA_nodes,MV_nodes,i)
   local pos1={}
   pos1.x=MV_nodes[i].x
   pos1.y=MV_nodes[i].y
   pos1.z=MV_nodes[i].z

      pos1.z=pos1.z+1
      check_MV_node_subp (PR_nodes,RE_nodes,MV_nodes,pos1)
      pos1.z=pos1.z-2
      check_MV_node_subp (PR_nodes,RE_nodes,MV_nodes,pos1)
      pos1.z=pos1.z+1
return new_node_added
   pos1.x=pos1.x+1
   check_MV_node_subp(PR_nodes,RE_nodes,BA_nodes,MV_nodes,pos1)
   pos1.x=pos1.x-2
   check_MV_node_subp(PR_nodes,RE_nodes,BA_nodes,MV_nodes,pos1)
   pos1.x=pos1.x+1

   pos1.y=pos1.y+1
   check_MV_node_subp(PR_nodes,RE_nodes,BA_nodes,MV_nodes,pos1)
   pos1.y=pos1.y-2
   check_MV_node_subp(PR_nodes,RE_nodes,BA_nodes,MV_nodes,pos1)
   pos1.y=pos1.y+1

   pos1.z=pos1.z+1
   check_MV_node_subp(PR_nodes,RE_nodes,BA_nodes,MV_nodes,pos1)
   pos1.z=pos1.z-2
   check_MV_node_subp(PR_nodes,RE_nodes,BA_nodes,MV_nodes,pos1)
   pos1.z=pos1.z+1
end

function check_MV_node_subp (PR_nodes,RE_nodes,MV_nodes,pos1)
meta = minetest.env:get_meta(pos1)
if meta:get_float("mv_cablelike")==1 then new_node_added=add_new_MVcable_node(MV_nodes,pos1) end
for i in ipairs(MV_machines) do
   if minetest.env:get_node(pos1).name == MV_machines[i].machine_name then 
      if MV_machines[i].machine_type == "PR" then
         new_node_added=add_new_MVcable_node(PR_nodes,pos1) 
         end
      if MV_machines[i].machine_type == "RE" then
         new_node_added=add_new_MVcable_node(RE_nodes,pos1) 
         end
   end
function check_MV_node_subp (PR_nodes,RE_nodes,BA_nodes,MV_nodes,pos1)
   local meta = minetest.env:get_meta(pos1)
   local name = minetest.env:get_node(pos1).name
   if meta:get_float("mv_cablelike")==1 then
      add_new_MVcable_node(MV_nodes,pos1)
   elseif MV_machines[name] then
      --print(name.." is a "..MV_machines[name])
      if     MV_machines[name] == "PR" then
    add_new_MVcable_node(PR_nodes,pos1)
      elseif MV_machines[name] == "RE" then
    add_new_MVcable_node(RE_nodes,pos1)
      elseif MV_machines[name] == "BA" then
    add_new_MVcable_node(BA_nodes,pos1)
      end
   end
end
end