advtrains.git - Advtrains mod for minetest.

path: root/advtrains/models/advtrains_dtrack_cr_30.b3d

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--atc.lua
--registers and controls the ATC system

local atc={}
-- ATC persistence table
atc.controllers = {}
--contents: {command="...", arrowconn=0-15 where arrow points}

advtrains.fpath_atc=minetest.get_worldpath().."/advtrains_atc"
local file, err = io.open(advtrains.fpath_atc, "r")
if not file then
	local er=err or "Unknown Error"
	atprint("[advtrains]Failed loading advtrains atc save file "..er)
else
	local tbl = minetest.deserialize(file:read("*a"))
	if type(tbl) == "table" then
		atc.controllers=tbl.controllers
	end
	file:close()
end
function atc.save()
	--leave space for more save data.
	local datastr = minetest.serialize({controllers = atc.controllers})
	if not datastr then
		minetest.log("error", "[advtrains] Failed to serialize trackdb data!")
		return
	end
	local file, err = io.open(advtrains.fpath_atc, "w")
	if err then
		return err
	end
	file:write(datastr)
	file:close()
end

--call from advtrains.detector subprogram

function atc.trigger_controller_train_enter(pos, train_id)
	atc.send_command(pos)
end

--general

function atc.send_command(pos)
	local pts=minetest.pos_to_string(pos)
	if atc.controllers[pts] then
		atprint("Called send_command at "..pts)
		local train_id = advtrains.detector.on_node[pts]
		if train_id then
			if advtrains.trains[train_id] then
				atprint("send_command inside if: "..sid(train_id))
				atc.train_reset_command(train_id)
				local arrowconn=atc.controllers[pts].arrowconn
				local train=advtrains.trains[train_id]
				for index, ppos in pairs(train.path) do
					if vector.equals(advtrains.round_vector_floor_y(ppos), pos) then
						advtrains.trains[train_id].atc_arrow =
								vector.equals(
										advtrains.dirCoordSet(pos, arrowconn),
										advtrains.round_vector_floor_y(train.path[index+train.movedir])
								)
						advtrains.trains[train_id].atc_command=atc.controllers[pts].command
						atprint("Sending ATC Command: "..atc.controllers[pts].command)
					end
				end
			end
		end
	end
	return false
end

function atc.train_reset_command(train_id)
	advtrains.trains[train_id].atc_command=nil
	advtrains.trains[train_id].atc_delay=0
	advtrains.trains[train_id].atc_brake_target=nil
	advtrains.trains[train_id].atc_wait_finish=nil
	advtrains.trains[train_id].atc_arrow=nil
end

--nodes
local idxtrans={static=1, mesecon=2, digiline=3}
local apn_func=function(pos)
	advtrains.reset_trackdb_position(pos)
	local meta=minetest.get_meta(pos)
	if meta then
		meta:set_string("infotext", "ATC controller, unconfigured.")
		meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
	end
end

advtrains.register_tracks("default", {
	nodename_prefix="advtrains:dtrack_atc",
	texture_prefix="advtrains_dtrack_atc",
	models_prefix="advtrains_dtrack_detector",
	models_suffix=".b3d",
	shared_texture="advtrains_dtrack_rail_atc.png",
	description="ATC controller",
	formats={},
	get_additional_definiton = function(def, preset, suffix, rotation)
		return {
			after_place_node=apn_func,
			on_place_rail=apn_func,
			after_dig_node=function(pos)
				advtrains.invalidate_all_paths()
				advtrains.reset_trackdb_position(pos)
				local pts=minetest.pos_to_string(pos)
				atc.controllers[pts]=nil
			end,
			on_receive_fields = function(pos, formname, fields, player)
				if minetest.is_protected(pos, player:get_player_name()) then
					minetest.chat_send_player(player:get_player_name(), "This position is protected!")
					return
				end
				local meta=minetest.get_meta(pos)
				if meta then
					if not fields.save then 
						--maybe only the dropdown changed
						if fields.mode then
							meta:set_string("mode", idxtrans[fields.mode])
							meta:set_string("infotext", "ATC controller, mode "..fields.mode.."\n"..( fields.mode=="digiline" and "Channel: "..meta:get_string("channel") or "Command: "..meta:get_string("command") ) )
							meta:set_string("formspec", atc.get_atc_controller_formspec(pos, meta))
						end
						return
					end
					meta:set_string("mode", idxtrans[fields.mode])
					meta:set_string("command", fields.command)
					meta:set_string("command_on", fields.command_on)
					meta:set_string("channel", fields.channel)


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