Changed power distribution method and streamlined the various existing machines.

An electrical network now requires a switching station to work. This statin is the one
resolving the network collecting power and distributing it again.
Added up/down converter. It is kind of finished. It can be updated with a slot for an upgrade
but so far it works without by resolving the types of wires above and below the box.
Tool and machine registering changed to use a table with key+value instead of the iterative method it used to have.
The power radiator changed to be able to send up to 3000MV EUs in a radius of 6.

This update will most likely require existing networks to be dug up and placed again. Also the
switching station must be added.

technic/init.lua

@@ -4,7 +4,13 @@
 
 technic = {}
 
-modpath=minetest.get_modpath("technic")
+technic.dprint = function(string)
+		    if technic.DBG == 1 then
+		       print(string)
+		    end
+		 end
+
+local modpath=minetest.get_modpath("technic")
 
 --Read technic config file
 dofile(modpath.."/config.lua")
@@ -14,19 +20,26 @@ dofile(modpath.."/helpers.lua")
 --items 
 dofile(modpath.."/items.lua")
 
+-- Register functions
+dofile(modpath.."/register_machine_and_tool.lua")
+dofile(modpath.."/alloy_furnaces_commons.lua") -- Idea: Let the LV, MV, HV version of the furnace support different alloys
+
+-- Switching station LV,MV,HV
+dofile(modpath.."/switching_station.lua")
+dofile(modpath.."/supply_converter.lua")
+
 --LV machines
 dofile(modpath.."/wires.lua")
 dofile(modpath.."/battery_box.lua")
-dofile(modpath.."/alloy_furnaces_commons.lua")
 dofile(modpath.."/alloy_furnace.lua")
 dofile(modpath.."/solar_panel.lua")
 dofile(modpath.."/solar_array_lv.lua")
 dofile(modpath.."/geothermal.lua")
 dofile(modpath.."/water_mill.lua")
+dofile(modpath.."/generator.lua")
 dofile(modpath.."/electric_furnace.lua")
 dofile(modpath.."/tool_workshop.lua")
 dofile(modpath.."/music_player.lua")
-dofile(modpath.."/generator.lua")
 dofile(modpath.."/grinder.lua")
 dofile(modpath.."/cnc.lua")
 dofile(modpath.."/cnc_api.lua")
@@ -36,20 +49,18 @@ dofile(modpath.."/cnc_nodes.lua")
 dofile(modpath.."/wires_mv.lua")
 dofile(modpath.."/battery_box_mv.lua")
 dofile(modpath.."/solar_array_mv.lua")
-dofile(modpath.."/down_converter_mv.lua")
 dofile(modpath.."/electric_furnace_mv.lua")
 dofile(modpath.."/alloy_furnace_mv.lua")
-dofile(modpath.."/forcefield.lua")
--- These two are a concept study: Supplying appliances with inductive coupled power:
--- lighting and associated textures is taken directly from VanessaE's homedecor and made electric.
+--dofile(modpath.."/forcefield.lua")
+---- The power radiator supplies appliances with inductive coupled power:
+---- lighting and associated textures is taken directly from VanessaE's homedecor and made electric.
 dofile(modpath.."/power_radiator.lua")
 dofile(modpath.."/lighting.lua")
-
---HV machines
+--
+----HV machines
 dofile(modpath.."/wires_hv.lua")
 dofile(modpath.."/battery_box_hv.lua")
 dofile(modpath.."/solar_array_hv.lua")
-dofile(modpath.."/down_converter_hv.lua")
 
 --Tools
 if technic.config:getBool("enable_mining_drill") then dofile(modpath.."/mining_drill.lua") end
@@ -59,8 +70,8 @@ dofile(modpath.."/cans.lua")
 dofile(modpath.."/chainsaw.lua")
 dofile(modpath.."/tree_tap.lua")
 dofile(modpath.."/sonic_screwdriver.lua")
-
--- mesecons and tubes related
+--
+---- mesecons and tubes related
 dofile(modpath.."/injector.lua")
 dofile(modpath.."/node_breaker.lua")
 dofile(modpath.."/deployer.lua")
@@ -68,24 +79,23 @@ dofile(modpath.."/constructor.lua")
 dofile(modpath.."/frames.lua")
 
 function has_locked_chest_privilege(meta, player)
-	if player:get_player_name() ~= meta:get_string("owner") then
-		return false
-	end
-	return true
+   if player:get_player_name() ~= meta:get_string("owner") then
+      return false
+   end
+   return true
 end
 
 
+-- Swap nodes out. Return the node name.
 function hacky_swap_node(pos,name)
-	local node = minetest.env:get_node(pos)
-	local meta = minetest.env:get_meta(pos)
-	local meta0 = meta:to_table()
-	if node.name == name then
-		return nil
-	end
-	node.name = name
-	local meta0 = meta:to_table()
-	minetest.env:set_node(pos,node)
-	meta = minetest.env:get_meta(pos)
-	meta:from_table(meta0)
-	return 1
+   local node = minetest.env:get_node(pos)
+   if node.name ~= name then
+      local meta = minetest.env:get_meta(pos)
+      local meta0 = meta:to_table()
+      node.name = name
+      minetest.env:set_node(pos,node)
+      meta = minetest.env:get_meta(pos)
+      meta:from_table(meta0)
+   end
+   return node.name
 end