From 8e03d7ded6441b26e9d44102c0cd2ee39f9e90bc Mon Sep 17 00:00:00 2001
From: RealBadAngel <mk@realbadangel.pl>
Date: Sun, 30 Jun 2013 07:12:02 +0200
Subject: [PATCH] Sync with indev branch, bump version to 0.4.7

---
 technic/battery_box.lua |  655 +++++++++++++++++++++++++++++------------------------------
 1 files changed, 323 insertions(+), 332 deletions(-)

diff --git a/technic/battery_box.lua b/technic/battery_box.lua
index d36bca1..5726053 100644
--- a/technic/battery_box.lua
+++ b/technic/battery_box.lua
@@ -1,402 +1,393 @@
-LV_machines = {}
-registered_LV_machines_count=0
-
-function register_LV_machine (string1,string2)
-registered_LV_machines_count=registered_LV_machines_count+1
-LV_machines[registered_LV_machines_count]={}
-LV_machines[registered_LV_machines_count].machine_name=string1
-LV_machines[registered_LV_machines_count].machine_type=string2
+-- register LV machines here
+local LV_machines = {}
+function register_LV_machine(string1,string2)
+   LV_machines[string1] = string2
 end
 
 power_tools ={}
 registered_power_tools_count=0
 
 function register_power_tool (string1,max_charge)
-registered_power_tools_count=registered_power_tools_count+1
-power_tools[registered_power_tools_count]={}
-power_tools[registered_power_tools_count].tool_name=string1
-power_tools[registered_power_tools_count].max_charge=max_charge
+   registered_power_tools_count=registered_power_tools_count+1
+   power_tools[registered_power_tools_count]={}
+   power_tools[registered_power_tools_count].tool_name=string1
+   power_tools[registered_power_tools_count].max_charge=max_charge
 end
 
-register_power_tool ("technic:mining_drill",60000)
-register_power_tool ("technic:chainsaw",30000)
-register_power_tool ("technic:laser_mk1",40000)
 register_power_tool ("technic:battery",10000)
-register_power_tool ("technic:sonic_screwdriver",15000)
-register_power_tool ("technic:flashlight",30000)
 register_power_tool ("technic:red_energy_crystal",100000)
 register_power_tool ("technic:green_energy_crystal",250000)
 register_power_tool ("technic:blue_energy_crystal",500000)
 
-minetest.register_alias("battery", "technic:battery")
-minetest.register_alias("battery_box", "technic:battery_box")
+minetest.register_craft({
+			   output = 'technic:battery 1',
+			   recipe = {
+			      {'default:wood', 'moreores:copper_ingot', 'default:wood'},
+			      {'default:wood', 'moreores:tin_ingot', 'default:wood'},
+			      {'default:wood', 'moreores:copper_ingot', 'default:wood'},
+			   }
+			})
 
 minetest.register_craft({
-	output = 'technic:battery 1',
-	recipe = {
-		{'default:wood', 'moreores:copper_ingot', 'default:wood'},
-		{'default:wood', 'moreores:tin_ingot', 'default:wood'},
-		{'default:wood', 'moreores:copper_ingot', 'default:wood'},
-	}
-}) 
-
-minetest.register_craft({
-	output = 'technic:battery_box 1',
-	recipe = {
-		{'technic:battery', 'default:wood', 'technic:battery'},
-		{'technic:battery', 'moreores:copper_ingot', 'technic:battery'},
-		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
-	}
-}) 
+			   output = 'technic:battery_box 1',
+			   recipe = {
+			      {'technic:battery', 'default:wood', 'technic:battery'},
+			      {'technic:battery', 'moreores:copper_ingot', 'technic:battery'},
+			      {'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
+			   }
+			})
 
 
 minetest.register_tool("technic:battery",
-{description = "RE Battery",
-inventory_image = "technic_battery.png",
-tool_capabilities = {load=0,max_drop_level=0, groupcaps={fleshy={times={}, uses=10000, maxlevel=0}}}}) 
+		       {description = "RE Battery",
+			inventory_image = "technic_battery.png",
+			tool_capabilities = {load=0,max_drop_level=0, groupcaps={fleshy={times={}, uses=10000, maxlevel=0}}}})
 
 minetest.register_craftitem("technic:battery_box", {
-	description = "Battery box",
-	stack_max = 99,
-}) 
+			       description = "Battery box",
+			       stack_max = 99,
+			    })
 
 
 
 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;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;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:battery_box", {
-	description = "Battery box",
-	tiles = {"technic_battery_box_top.png", "technic_battery_box_bottom.png", "technic_battery_box_side0.png",
-		"technic_battery_box_side0.png", "technic_battery_box_side0.png", "technic_battery_box_side0.png"},
-	groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
-	sounds = default.node_sound_wood_defaults(),
-	technic_power_machine=1,
-	last_side_shown=0,
-	drop="technic:battery_box",
-	on_construct = function(pos)
-		local meta = minetest.env:get_meta(pos)
-		meta:set_string("infotext", "Battery box")
-		meta:set_float("technic_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 = 60000
-		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:battery_box", {
+      description = "LV Battery Box",
+      tiles = {"technic_battery_box_top.png", "technic_battery_box_bottom.png", "technic_battery_box_side0.png",
+	       "technic_battery_box_side0.png", "technic_battery_box_side0.png", "technic_battery_box_side0.png"},
+      groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
+      sounds = default.node_sound_wood_defaults(),
+      drop="technic: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", "Battery box")
+			     meta:set_float("technic_power_machine", 1)
+			     meta:set_string("formspec", battery_box_formspec)
+			     meta:set_float("internal_EU_buffer", 0)
+			     meta:set_float("internal_EU_buffer_size", 60000)
+			     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,
+   })
 
 
 for i=1,8,1 do
-minetest.register_node("technic:battery_box"..i, {
-	description = "Battery box",
-	tiles = {"technic_battery_box_top.png", "technic_battery_box_bottom.png", "technic_battery_box_side0.png^technic_power_meter"..i..".png",
-		"technic_battery_box_side0.png^technic_power_meter"..i..".png", "technic_battery_box_side0.png^technic_power_meter"..i..".png", "technic_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:battery_box",
-	on_construct = function(pos)
-		local meta = minetest.env:get_meta(pos)
-		meta:set_string("infotext", "Battery box")
-		meta:set_float("technic_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 = 60000
-		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:battery_box"..i, {
+	 description = "LV Battery Box",
+	 tiles = {"technic_battery_box_top.png", "technic_battery_box_bottom.png", "technic_battery_box_side0.png^technic_power_meter"..i..".png",
+		  "technic_battery_box_side0.png^technic_power_meter"..i..".png", "technic_battery_box_side0.png^technic_power_meter"..i..".png", "technic_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: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", "Battery box")
+			     meta:set_float("technic_power_machine", 1)
+			     meta:set_string("formspec", battery_box_formspec)
+			     meta:set_float("internal_EU_buffer", 0)
+			     meta:set_float("internal_EU_buffer_size", 60000)
+			     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
 
-
-LV_nodes_visited = {}
-
 function get_RE_item_load (load1,max_load)
-if load1==0 then load1=65535 end
-local temp = 65536-load1
-temp= temp/65535*max_load
-return math.floor(temp + 0.5)
+   if load1==0 then load1=65535 end
+   local temp = 65536-load1
+   temp= temp/65535*max_load
+   return math.floor(temp + 0.5)
 end
 
 function set_RE_item_load (load1,max_load)
-if load1 == 0 then return 65535 end
-local temp=load1/max_load*65535
-temp=65536-temp
-return math.floor(temp)
+   if load1 == 0 then return 65535 end
+   local temp=load1/max_load*65535
+   temp=65536-temp
+   return math.floor(temp)
 end
 
 function set_RE_wear (item_stack,load1,max_load)
-local temp=65536-math.floor(load1/max_load*65535)
-item_stack["wear"]=tostring(temp)
-return item_stack	
+   local temp=65536-math.floor(load1/max_load*65535)
+   item_stack["wear"]=tostring(temp)
+   return item_stack
 end
 
-minetest.register_abm({
-	nodenames = {"technic:battery_box","technic:battery_box1","technic:battery_box2","technic:battery_box3","technic:battery_box4",
-		     "technic:battery_box5","technic:battery_box6","technic:battery_box7","technic: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= 60000
-	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:battery_box"..i)  
-	elseif i==0 then hacky_swap_node(pos,"technic:battery_box") end 
-	meta:set_float("last_side_shown",i)
-	end
+minetest.register_abm(
+   {nodenames = {"technic:battery_box","technic:battery_box1","technic:battery_box2","technic:battery_box3","technic:battery_box4",
+		 "technic:battery_box5","technic:battery_box6","technic:battery_box7","technic: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 = 60000 -- Set maximum charge for the device here
+		local charge     = meta:get_int("internal_EU_buffer")
 
---loading registered power tools	
-	local inv = meta:get_inventory()
-	if inv:is_empty("src")==false  then 
-		srcstack = inv:get_stack("src", 1)
-		src_item=srcstack:to_table()
-		item_meta=srcstack:get_metadata()
-		if src_item["metadata"]=="" then src_item["metadata"]="0" end --create meta for not used before tool/item
-
-	local item_max_charge = nil
-	local counter=registered_power_tools_count
-	for i=1, counter,1 do
-		if power_tools[i].tool_name==src_item["name"] then
-		item_max_charge=power_tools[i].max_charge	
-		end
-		end
-	if item_max_charge then
-		load1=tonumber((src_item["metadata"])) 
-		load_step=1000
-		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_item["metadata"]=tostring(load1)
-		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 item_max_charge = nil
-		local counter=registered_power_tools_count-1
-		for i=1, counter,1 do
-		if power_tools[i].tool_name==src_item["name"] then
-		item_max_charge=power_tools[i].max_charge	
-		end
-		end
-		if item_max_charge then
-		if src_item["metadata"]=="" then src_item["metadata"]="0" end --create meta for not used before battery/crystal
-		local load1=tonumber((src_item["metadata"])) 
-		load_step=1000
-		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_item["metadata"]=tostring(load1)	
-		inv:set_stack("dst", 1, src_item)
-		end		
-		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:battery_box"..i)
+		   elseif i==0 then hacky_swap_node(pos,"technic:battery_box") end
+		   meta:set_float("last_side_shown",i)
 		end
 		
-	meta:set_int("battery_charge",charge)
-
-	local load = math.floor(charge/60000 * 100)
-	meta:set_string("formspec",
-				"invsize[8,9;]"..
-				"image[1,1;1,2;technic_power_meter_bg.png^[lowpart:"..
-						(load)..":technic_power_meter_fg.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;Battery box]"..
-				"label[3,0;Charge]"..
-				"label[5,0;Discharge]"..
-				"label[1,3;Power level]"..
-				"list[current_player;main;0,5;8,4;]")
+		--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 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
+			 -- Do the charging
+			 local item_max_charge = power_tools[i].max_charge
+			 local load1           = src_meta["charge"]
+			 local load_step       = 1000 -- 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
 		
-	local pos1={}
+		-- 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
 
-	pos1.y=pos.y-1
-	pos1.x=pos.x
-	pos1.z=pos.z
+		local load = math.floor(charge/60000 * 100)
+		meta:set_string("formspec",
+				battery_box_formspec..
+				   "image[1,1;1,2;technic_power_meter_bg.png^[lowpart:"..
+				   (load)..":technic_power_meter_fg.png]"
+			     )
 
+		-- 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("cablelike")~=1 then return end
+		meta1 = minetest.env:get_meta(pos1)
+		if meta1:get_float("cablelike")~=1 then return end
 
 		local LV_nodes = {}
 		local PR_nodes = {}
 		local RE_nodes = {}
+		local BA_nodes = {}
 
-	 	LV_nodes[1]={}
-	 	LV_nodes[1].x=pos1.x
+		LV_nodes[1]={}
+		LV_nodes[1].x=pos1.x
 		LV_nodes[1].y=pos1.y
 		LV_nodes[1].z=pos1.z
 		LV_nodes[1].visited=false
 
-
-table_index=1
-	repeat
-	check_LV_node (PR_nodes,RE_nodes,LV_nodes,table_index)
-	table_index=table_index+1
-	if LV_nodes[table_index]==nil then break end
-	until false
+		local table_index=1
+		repeat
+		   check_LV_node(PR_nodes,RE_nodes,BA_nodes,LV_nodes,table_index)
+		   table_index=table_index+1
+		   if LV_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=200	
-	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     = 200
+		   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(200, 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=200
-	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", "LV 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_LV_machine("technic:battery_box","BA")
+for i=1,8,1 do
+   register_LV_machine("technic:battery_box"..i,"BA")
 end
-})
 
 function add_new_cable_node (LV_nodes,pos1)
-local i=1
-	repeat
-		if LV_nodes[i]==nil then break end
-		if pos1.x==LV_nodes[i].x and pos1.y==LV_nodes[i].y and pos1.z==LV_nodes[i].z then return false end
-		i=i+1
-	until false
-LV_nodes[i]={}
-LV_nodes[i].x=pos1.x
-LV_nodes[i].y=pos1.y
-LV_nodes[i].z=pos1.z
-LV_nodes[i].visited=false
-return true
+   if LV_nodes == nil then return true end
+   local i=1
+   repeat
+      if LV_nodes[i]==nil then break end
+      if pos1.x==LV_nodes[i].x and pos1.y==LV_nodes[i].y and pos1.z==LV_nodes[i].z then return false end
+      i=i+1
+   until false
+   LV_nodes[i]={}
+   LV_nodes[i].x=pos1.x
+   LV_nodes[i].y=pos1.y
+   LV_nodes[i].z=pos1.z
+   return true
 end
 
-function check_LV_node (PR_nodes,RE_nodes,LV_nodes,i)
-		local pos1={}
-		pos1.x=LV_nodes[i].x
-		pos1.y=LV_nodes[i].y
-		pos1.z=LV_nodes[i].z
-		LV_nodes[i].visited=true
-		new_node_added=false
-	
-		pos1.x=pos1.x+1
-		check_LV_node_subp (PR_nodes,RE_nodes,LV_nodes,pos1)
-		pos1.x=pos1.x-2
-		check_LV_node_subp (PR_nodes,RE_nodes,LV_nodes,pos1)
-		pos1.x=pos1.x+1
-		
-		pos1.y=pos1.y+1
-		check_LV_node_subp (PR_nodes,RE_nodes,LV_nodes,pos1)
-		pos1.y=pos1.y-2
-		check_LV_node_subp (PR_nodes,RE_nodes,LV_nodes,pos1)
-		pos1.y=pos1.y+1
+function check_LV_node(PR_nodes,RE_nodes,BA_nodes,LV_nodes,i)
+   local pos1={}
+   pos1.x=LV_nodes[i].x
+   pos1.y=LV_nodes[i].y
+   pos1.z=LV_nodes[i].z
 
-		pos1.z=pos1.z+1
-		check_LV_node_subp (PR_nodes,RE_nodes,LV_nodes,pos1)
-		pos1.z=pos1.z-2
-		check_LV_node_subp (PR_nodes,RE_nodes,LV_nodes,pos1)
-		pos1.z=pos1.z+1
-return new_node_added
+   pos1.x=pos1.x+1
+   check_LV_node_subp (PR_nodes,RE_nodes,BA_nodes,LV_nodes,pos1)
+   pos1.x=pos1.x-2
+   check_LV_node_subp (PR_nodes,RE_nodes,BA_nodes,LV_nodes,pos1)
+   pos1.x=pos1.x+1
+
+   pos1.y=pos1.y+1
+   check_LV_node_subp (PR_nodes,RE_nodes,BA_nodes,LV_nodes,pos1)
+   pos1.y=pos1.y-2
+   check_LV_node_subp (PR_nodes,RE_nodes,BA_nodes,LV_nodes,pos1)
+   pos1.y=pos1.y+1
+
+   pos1.z=pos1.z+1
+   check_LV_node_subp (PR_nodes,RE_nodes,BA_nodes,LV_nodes,pos1)
+   pos1.z=pos1.z-2
+   check_LV_node_subp (PR_nodes,RE_nodes,BA_nodes,LV_nodes,pos1)
+   pos1.z=pos1.z+1
+   return new_node_added
 end
 
-function check_LV_node_subp (PR_nodes,RE_nodes,LV_nodes,pos1)
-meta = minetest.env:get_meta(pos1)
-if meta:get_float("cablelike")==1 then new_node_added=add_new_cable_node(LV_nodes,pos1) end
-for i in ipairs(LV_machines) do
-	if minetest.env:get_node(pos1).name == LV_machines[i].machine_name then 
-		if LV_machines[i].machine_type == "PR" then
-			new_node_added=add_new_cable_node(PR_nodes,pos1) 
-			end
-		if LV_machines[i].machine_type == "RE" then
-			new_node_added=add_new_cable_node(RE_nodes,pos1) 
-			end
-	end
-end
+function check_LV_node_subp (PR_nodes,RE_nodes,BA_nodes,LV_nodes,pos1)
+   local meta = minetest.env:get_meta(pos1)
+   local name = minetest.env:get_node(pos1).name
+   if meta:get_float("cablelike")==1 then
+      add_new_cable_node(LV_nodes,pos1)
+   elseif LV_machines[name] then
+      --print(name.." is a "..LV_machines[name])
+      if     LV_machines[name] == "PR" then
+	 add_new_cable_node(PR_nodes,pos1)
+      elseif LV_machines[name] == "RE" then
+	 add_new_cable_node(RE_nodes,pos1)
+      elseif LV_machines[name] == "BA" then
+	 add_new_cable_node(BA_nodes,pos1)
+      end
+   end
 end

--
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