game/technic.git

New file
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			-- LV Battery box and some other nodes...
			technic.register_LV_power_tool("technic:battery",10000)
			technic.register_MV_power_tool("technic:red_energy_crystal",100000)
			technic.register_HV_power_tool("technic:green_energy_crystal",250000)
			technic.register_HV_power_tool("technic:blue_energy_crystal",500000)

			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_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}}}})

			--------------------------------------------
			-- The Battery box
			--------------------------------------------
			minetest.register_craftitem(
			"technic:battery_box",
			{
			description = "Battery box",
			stack_max = 99,
			})

			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'},
			}
			})

			local 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;]"

			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)
			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_int("LV_EU_demand", 0) -- How much can this node charge
			meta:set_int("LV_EU_supply", 0) -- How much can this node discharge
			meta:set_int("LV_EU_input", 0) -- How much power is this machine getting.
			meta:set_float("internal_EU_charge", 0)
			inv:set_size("src", 1)
			inv:set_size("dst", 1)
			end,
			can_dig = function(pos,player)
			local meta = minetest.env:get_meta(pos);
			local inv = meta:get_inventory()
			if not inv:is_empty("src") or not inv:is_empty("dst") then
			minetest.chat_send_player(player:get_player_name(), "Machine cannot be removed because it is not empty");
			return false
			else
			return true
			end
			end,
			})


			for i=1,8,1 do
			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",
			can_dig = function(pos,player)
			local meta = minetest.env:get_meta(pos);
			local inv = meta:get_inventory()
			if not inv:is_empty("src") or not inv:is_empty("dst") then
			minetest.chat_send_player(player:get_player_name(), "Machine cannot be removed because it is not empty");
			return false
			else
			return true
			end
			end,
			})
			end

			local power_tools = technic.LV_power_tools

			local charge_LV_tools = function(meta, 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 toolname = src_item["name"]
			if power_tools[toolname] ~= nil then
			-- Set meta data for the tool if it didn't do it itself :-(
			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[toolname]
			local load = src_meta["charge"]
			local load_step = 1000 -- how much to charge per tick
			if load<item_max_charge and charge>0 then
			if charge-load_step<0 then load_step=charge end
			if load+load_step>item_max_charge then load_step=item_max_charge-load end
			load=load+load_step
			charge=charge-load_step
			technic.set_RE_wear(src_item,load,item_max_charge)
			src_meta["charge"] = load
			src_item["metadata"] = set_item_meta(src_meta)
			inv:set_stack("src", 1, src_item)
			end
			end
			end
			return charge -- return the remaining charge in the battery
			end

			local discharge_LV_tools = function(meta, charge, max_charge)
			-- discharging registered power tools
			local inv = meta:get_inventory()
			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 toolname = src_item["name"]
			if power_tools[toolname] ~= nil then
			-- Set meta data for the tool if it didn't do it itself :-(
			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 discharging
			local item_max_charge = power_tools[toolname]
			local load = src_meta["charge"]
			local load_step = 4000 -- how much to discharge per tick
			if load>0 and charge<max_charge then
			if charge+load_step>max_charge then load_step=max_charge-charge end
			if load-load_step<0 then load_step=load end
			load=load-load_step
			charge=charge+load_step
			technic.set_RE_wear(src_item,load,item_max_charge)
			src_meta["charge"]=load
			src_item["metadata"]=set_item_meta(src_meta)
			inv:set_stack("dst", 1, src_item)
			end
			end
			end
			return charge -- return the remaining charge in the battery
			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 max_charge_rate = 1000 -- Set maximum rate of charging
			local max_discharge_rate = 2000 -- Set maximum rate of discharging
			local eu_input = meta:get_int("LV_EU_input")
			local current_charge = meta:get_int("internal_EU_charge") -- Battery charge right now

			-- Power off automatically if no longer connected to a switching station
			technic.switching_station_timeout_count(pos, "LV")

			-- Charge/discharge the battery with the input EUs
			if eu_input >=0 then
			current_charge = math.min(current_charge+eu_input, max_charge)
			else
			current_charge = math.max(current_charge+eu_input, 0)
			end

			-- Charging/discharging tools here
			current_charge = charge_LV_tools(meta, current_charge)
			current_charge = discharge_LV_tools(meta, current_charge, max_charge)

			-- Set a demand (we allow batteries to charge on less than the demand though)
			meta:set_int("LV_EU_demand", math.min(max_charge_rate, max_charge-current_charge))
			--print("BA:"..max_charge_rate.."\|"..max_charge-current_charge.."\|"..math.min(max_charge_rate, max_charge-current_charge))

			-- Set how much we can supply
			meta:set_int("LV_EU_supply", math.min(max_discharge_rate, current_charge))

			meta:set_int("internal_EU_charge", current_charge)
			--dprint("BA: input:"..eu_input.." supply="..meta:get_int("LV_EU_supply").." demand="..meta:get_int("LV_EU_demand").." current:"..current_charge)

			-- Select node textures
			local i=math.ceil((current_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

			local load = math.floor(current_charge/max_charge * 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]"
			)

			if eu_input == 0 then
			meta:set_string("infotext", "LV Battery box: "..current_charge.."/"..max_charge.." (idle)")
			else
			meta:set_string("infotext", "LV Battery box: "..current_charge.."/"..max_charge)
			end

			end
			})

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