250 lines
8 KiB
Lua
250 lines
8 KiB
Lua
-- atc_rail.lua
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-- registers and handles the ATC rail. Active component.
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-- This is the only component that can interface with trains, so train interface goes here too.
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--Using subtable
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local r={}
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-- Note on appr_internal:
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-- The Approach callback is a special corner case: the train is not on the node, and it is executed synchronized
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-- (in the train step right during LZB traversal). We therefore need access to the train id and the lzbdata table
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function r.fire_event(pos, evtdata, appr_internal)
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local ph=minetest.pos_to_string(pos)
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local railtbl = atlatc.active.nodes[ph]
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if not railtbl then
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atwarn("LuaATC interface rail at",ph,": Data not in memory! Please visit position and click 'Save'!")
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return
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end
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--prepare ingame API for ATC. Regenerate each time since pos needs to be known
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--If no train, then return false.
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-- try to get the train from the event data
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-- This workaround is required because the callback is one step delayed, and a fast train may have already left the node.
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-- Also used for approach callback
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local train_id = evtdata._train_id
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local atc_arrow = evtdata._train_arrow
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local train, tvel
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if train_id then
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train=advtrains.trains[train_id]
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-- speed
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tvel=train.velocity
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-- if still no train_id available, try to get the train at my position
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else
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train_id=advtrains.get_train_at_pos(pos)
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if train_id then
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train=advtrains.trains[train_id]
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advtrains.train_ensure_init(train_id, train)
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-- look up atc_arrow
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local index = advtrains.path_lookup(train, pos)
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atc_arrow = (train.path_cn[index] == 1)
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-- speed
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tvel=train.velocity
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end
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end
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local customfct={
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atc_send = function(cmd)
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if not train_id then return false end
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assertt(cmd, "string")
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advtrains.atc.train_set_command(train, cmd, atc_arrow)
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return true
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end,
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split_at_index = function(index, cmd)
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if not train_id then return false end
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assertt(cmd, "string")
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if type(index) ~= "number" or index < 2 then
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return false
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end
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local new_id = advtrains.split_train_at_index(train, index)
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if new_id then
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minetest.after(1,advtrains.atc.train_set_command,advtrains.trains[new_id], cmd, atc_arrow)
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return true
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end
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return false
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end,
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split_at_fc = function(cmd, len)
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assertt(cmd, "string")
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if not train_id then return false end
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local new_id, fc = advtrains.split_train_at_fc(train, false, len)
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if new_id then
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minetest.after(1,advtrains.atc.train_set_command,advtrains.trains[new_id], cmd, atc_arrow)
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end
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return fc or ""
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end,
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split_off_locomotive = function(cmd, len)
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assertt(cmd, "string")
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if not train_id then return false end
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local new_id, fc = advtrains.split_train_at_fc(train, true, len)
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if new_id then
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minetest.after(1,advtrains.atc.train_set_command,advtrains.trains[new_id], cmd, atc_arrow)
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end
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end,
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train_length = function ()
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if not train_id then return false end
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return #train.trainparts
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end,
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step_fc = function()
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if not train_id then return false end
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advtrains.train_step_fc(train)
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end,
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set_shunt = function()
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-- enable shunting mode
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if not train_id then return false end
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train.is_shunt = true
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end,
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unset_shunt = function()
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if not train_id then return false end
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train.is_shunt = nil
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end,
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set_autocouple = function ()
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if not train_id then return false end
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train.autocouple = true
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end,
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unset_autocouple = function ()
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if not train_id then return false end
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train.autocouple = nil
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end,
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set_line = function(line)
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if type(line)~="string" and type(line)~="number" then
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return false
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end
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train.line = line .. ""
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minetest.after(0, advtrains.invalidate_path, train_id)
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return true
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end,
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get_line = function()
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return train.line
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end,
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set_rc = function(rc)
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if type(rc)~="string"then
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return false
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end
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train.routingcode = rc
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minetest.after(0, advtrains.invalidate_path, train_id)
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return true
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end,
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get_rc = function()
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return train.routingcode
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end,
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atc_reset = function(cmd)
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if not train_id then return false end
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assertt(cmd, "string")
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advtrains.atc.train_reset_command(train)
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return true
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end,
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atc_arrow = atc_arrow,
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atc_id = train_id,
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atc_speed = tvel,
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atc_set_text_outside = function(text)
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if not train_id then return false end
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if text then assertt(text, "string") end
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advtrains.trains[train_id].text_outside=text
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return true
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end,
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atc_set_text_inside = function(text)
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if not train_id then return false end
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if text then assertt(text, "string") end
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advtrains.trains[train_id].text_inside=text
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return true
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end,
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atc_get_text_outside = function()
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if not train_id then return false end
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return advtrains.trains[train_id].text_outside
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end,
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atc_get_text_inside = function(text)
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if not train_id then return false end
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return advtrains.trains[train_id].text_inside
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end,
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atc_set_lzb_tsr = function(speed)
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if not appr_internal then
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error("atc_set_lzb_tsr() can only be used during 'approach' events!")
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end
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assert(tonumber(speed), "Number expected!")
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local index = appr_internal.index
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advtrains.lzb_add_checkpoint(train, index, speed, nil)
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return true
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end,
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}
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-- interlocking specific
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if advtrains.interlocking then
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customfct.atc_set_ars_disable = function(value)
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advtrains.interlocking.ars_set_disable(train, value)
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end
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end
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atlatc.active.run_in_env(pos, evtdata, customfct)
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end
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advtrains.register_tracks("default", {
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nodename_prefix="advtrains_luaautomation:dtrack",
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texture_prefix="advtrains_dtrack_atc",
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models_prefix="advtrains_dtrack",
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models_suffix=".b3d",
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shared_texture="advtrains_dtrack_shared_atc.png",
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description=atltrans("LuaATC Rail"),
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formats={},
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get_additional_definiton = function(def, preset, suffix, rotation)
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return {
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after_place_node = atlatc.active.after_place_node,
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after_dig_node = atlatc.active.after_dig_node,
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on_receive_fields = function(pos, ...)
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atlatc.active.on_receive_fields(pos, ...)
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--set arrowconn (for ATC)
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local ph=minetest.pos_to_string(pos)
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local _, conns=advtrains.get_rail_info_at(pos, advtrains.all_tracktypes)
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local nodeent = atlatc.active.nodes[ph]
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if nodeent then
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nodeent.arrowconn=conns[1].c
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end
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end,
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advtrains = {
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on_train_enter = function(pos, train_id, train, index)
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--do async. Event is fired in train steps
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atlatc.interrupt.add(0, pos, {type="train", train=true, id=train_id,
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_train_id = train_id, _train_arrow = (train.path_cn[index] == 1)})
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end,
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on_train_approach = function(pos, train_id, train, index, has_entered, lzbdata)
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-- Insert an event only if the rail indicated that it supports approach callbacks
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local ph=minetest.pos_to_string(pos)
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local railtbl = atlatc.active.nodes[ph]
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-- uses a "magic variable" in the local environment of the node
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-- This hack is necessary because code might not be prepared to get approach events...
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if railtbl and railtbl.data and railtbl.data.__approach_callback_mode then
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local acm = railtbl.data.__approach_callback_mode
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local in_arrow = (train.path_cn[index] == 1)
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if acm==2 or (acm==1 and in_arrow) then
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local evtdata = {type="approach", approach=true, id=train_id, has_entered = has_entered,
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_train_id = train_id, _train_arrow = in_arrow} -- reuses code from train_enter
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-- This event is *required* to run synchronously, because it might set the ars_disable flag on the train and add LZB checkpoints,
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-- although this is generally discouraged because this happens right in a train step
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-- At this moment, I am not aware whether this may cause side effects, and I must encourage users not to do expensive calculations here.
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r.fire_event(pos, evtdata, {train_id = train_id, train = train, index = index, lzbdata = lzbdata})
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end
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end
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end,
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},
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luaautomation = {
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fire_event=r.fire_event
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},
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digiline = {
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receptor = {},
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effector = {
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action = atlatc.active.on_digiline_receive
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},
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},
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}
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end,
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}, advtrains.trackpresets.t_30deg_straightonly)
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atlatc.rail = r
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