advtrains.git - Advtrains mod for minetest.

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author	Gabriel Pérez-Cerezo <gabriel@gpcf.eu>	2016-10-26 17:01:31 +0200
committer	Gabriel Pérez-Cerezo <gabriel@gpcf.eu>	2016-10-26 17:01:31 +0200
commit	8f409f592060ea44755263d81bce8d13e7d6db3e (patch)
tree	b3479a211be442001fa83d1351d29132237e0fc2 /textures/advtrains_track_swrcr_45.png
parent	3990565538067850d920bcc439e31027b7926a4d (diff)
parent	8403d69097559815bfda7c85943ac5db3718c3cf (diff)
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Merge branch 'master' of https://github.com/orwell96/advtrains

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-- Signal API implementation --[[ Signal aspect table: Note: All speeds are measured in m/s, aka the number of + signs in the HUD. asp = { main = <int speed>, -- Main signal aspect, tells state and permitted speed of next section -- 0 = section is blocked -- >0 = section is free, speed limit is this value -- -1 = section is free, maximum speed permitted -- false/nil = Signal doesn't provide main signal information, retain current speed limit. shunt = <boolean>, -- Whether train may proceed as shunt move, on sight -- main aspect takes precedence over this -- When main==0, train switches to shunt move and is restricted to speed 6 proceed_as_main = <boolean>, -- If an approaching train is a shunt move and 'shunt' is false, -- the train may proceed as a train move under the "main" aspect -- if the main aspect permits it (i.e. main!=0) -- If this is not set, shunt moves are NOT allowed to switch to -- a train move, and must stop even if "main" would permit passing. -- This is intended to be used for "Halt for shunt moves" signs. dst = <int speed>, -- Distant signal aspect, tells state and permitted speed of the section after next section -- The character of these information is purely informational -- At this time, this field is not actively used -- 0 = section is blocked -- >0 = section is free, speed limit is this value -- -1 = section is free, maximum speed permitted -- false/nil = Signal doesn't provide distant signal information. -- the character of call_on and dead_end is purely informative call_on = <boolean>, -- Call-on route, expect train in track ahead (not implemented yet) dead_end = <boolean>, -- Route ends on a dead end (e.g. bumper) (not implemented yet) w_speed = <integer>, -- "Warning speed restriction". Supposed for short-term speed -- restrictions which always override any other restrictions -- imposed by "speed" fields, until lifted by a value of -1 -- (Example: german Langsamfahrstellen-Signale) } } == How signals actually work in here == Each signal (in the advtrains universe) is some node that has at least the following things: - An "influence point" that is set somewhere on a rail - An aspect which trains that pass the "influence point" have to obey There can be static and dynamic signals. Static signals are, roughly spoken, signs, while dynamic signals are "real" signals which can display different things. The node definition of a signal node should contain those fields: groups = { advtrains_signal = 2, save_in_at_nodedb = 1, } advtrains = { set_aspect = function(pos, node, asp) -- This function gets called whenever the signal should display -- a new or changed signal aspect. It is not required that -- the signal actually displays the exact same aspect, since -- some signals can not do this by design. However, it must -- display an aspect that is at least as restrictive as the passed -- aspect as far as it is capable of doing so. -- Examples: -- - pure shunt signals can not display a "main" aspect -- and have no effect on train moves, so they will only ever -- honor the shunt.free field for their aspect. -- - the german Hl system can only signal speeds of 40, 60 -- and 100 km/h, a speed of 80km/h should then be signalled -- as 60 km/h instead. -- In turn, it is not guaranteed that the aspect will fulfill the -- criteria put down in supported_aspects. -- If set_aspect is present, supported_aspects should also be declared. -- The aspect passed in here can always be queried using the -- advtrains.interlocking.signal_get_supposed_aspect(pos) function. -- It is always DANGER when the signal is not used as route signal. -- For static signals, this function should be completely omitted -- If this function is omitted, it won't be possible to use -- route setting on this signal. end, supported_aspects = { -- A table which tells which different types of aspects this signal -- is able to display. It is used to construct the "aspect editing" -- formspec for route programming (and others) It should always be -- present alongside with set_aspect. If this is not specified but -- set_aspect is, the user will be allowed to select any aspect. -- Any of the fields marked with <boolean/nil> support 3 types of values: nil: if this signal can switch between free/blocked false: always shows "blocked", unchangable true: always shows "free", unchangable -- Any of the "speed" fields should contain a list of possible values -- to be set as restriction. If omitted, the value of the described -- field is always assumed to be false (no information) -- A speed of 0 means that the signal can show a "blocked" aspect -- (which is probably the case for most signals) -- If the signal can signal "no information" on one of the fields -- (thus false is an acceptable value), include false in the list -- If your signal can only display a single speed (may it be -1), -- always enclose that single value into a list. (such as {-1}) main = {<speed1>, ..., <speedn>} or nil, dst = {<speed1>, ..., <speedn>} or nil, shunt = <boolean/nil>, call_on = <boolean/nil>, dead_end = <boolean/nil>, w_speed = {<speed1>, ..., <speedn>} or nil, }, Example for supported_aspects: supported_aspects = { main = {0, 6, -1}, -- can show either "Section blocked", "Proceed at speed 6" or "Proceed at maximum speed" dst = {0, false}, -- can show only if next signal shows "blocked", no other information. shunt = false, -- shunting by this signal is never allowed. call_on = false, dead_end = false, w_speed = nil, -- none of the information can be shown by the signal }, get_aspect = function(pos, node) -- This function gets called by the train safety system. It should return the aspect that this signal actually displays, not preferably the input of set_aspect. -- For regular, full-featured light signals, they will probably honor all entries in the original aspect, however, e.g. simple shunt signals always return main=false regardless of the set_aspect input because they can not signal "Halt" to train moves. -- advtrains.interlocking.DANGER contains a default "all-danger" aspect. -- If your signal does not cover certain sub-tables of the aspect, the following reasonable defaults are automatically assumed: main = false (unchanged) dst = false (unchanged) shunt = false (shunting not allowed) info = {} (no further information) end, } on_rightclick = advtrains.interlocking.signal_rc_handler can_dig = advtrains.interlocking.signal_can_dig after_dig_node = advtrains.interlocking.signal_after_dig (If you need to specify custom can_dig or after_dig_node callbacks, please call those functions anyway!) Important note: If your signal should support external ways to set its aspect (e.g. via mesecons), there are some things that need to be considered: - advtrains.interlocking.signal_get_supposed_aspect(pos) won't respect this - Whenever you change the signal aspect, and that aspect change did not happen through a call to advtrains.interlocking.signal_set_aspect(pos, asp), you are *required* to call this function: advtrains.interlocking.signal_on_aspect_changed(pos) in order to notify trains about the aspect change. This function will query get_aspect to retrieve the new aspect. ]]-- local DANGER = { main = 0, dst = false, shunt = false, } advtrains.interlocking.DANGER = DANGER advtrains.interlocking.GENERIC_FREE = { main = -1, shunt = false, dst = false, } local function convert_aspect_if_necessary(asp) if type(asp.main) == "table" then local newasp = {} if asp.main.free then newasp.main = asp.main.speed else newasp.main = 0 end if asp.dst and asp.dst.free then newasp.dst = asp.dst.speed else newasp.dst = 0 end newasp.proceed_as_main = asp.shunt.proceed_as_main newasp.shunt = asp.shunt.free -- Note: info table not transferred, it's not used right now return newasp end return asp end function advtrains.interlocking.update_signal_aspect(tcbs) if tcbs.signal then local asp = tcbs.aspect or DANGER advtrains.interlocking.signal_set_aspect(tcbs.signal, asp) end end function advtrains.interlocking.signal_can_dig(pos) return not advtrains.interlocking.db.get_sigd_for_signal(pos) end function advtrains.interlocking.signal_after_dig(pos) -- clear influence point advtrains.interlocking.db.clear_ip_by_signalpos(pos) end function advtrains.interlocking.signal_set_aspect(pos, asp) asp = convert_aspect_if_necessary(asp) local node=advtrains.ndb.get_node(pos) local ndef=minetest.registered_nodes[node.name] if ndef and ndef.advtrains and ndef.advtrains.set_aspect then ndef.advtrains.set_aspect(pos, node, asp) advtrains.interlocking.signal_on_aspect_changed(pos) end end -- should be called when aspect has changed on this signal. function advtrains.interlocking.signal_on_aspect_changed(pos) local ipts, iconn = advtrains.interlocking.db.get_ip_by_signalpos(pos) if not ipts then return end local ipos = minetest.string_to_pos(ipts) advtrains.invalidate_all_paths_ahead(ipos) end function advtrains.interlocking.signal_rc_handler(pos, node, player, itemstack, pointed_thing) local pname = player:get_player_name() local control = player:get_player_control() if control.aux1 then advtrains.interlocking.show_ip_form(pos, pname) return end local sigd = advtrains.interlocking.db.get_sigd_for_signal(pos) if sigd then advtrains.interlocking.show_signalling_form(sigd, pname) else local ndef = minetest.registered_nodes[node.name] if ndef.advtrains and ndef.advtrains.set_aspect then -- permit to set aspect manually local function callback(pname, aspect) advtrains.interlocking.signal_set_aspect(pos, aspect) end local isasp = ndef.advtrains.get_aspect(pos, node) advtrains.interlocking.show_signal_aspect_selector( pname, ndef.advtrains.supported_aspects, "Set aspect manually", callback, isasp) else --static signal - only IP advtrains.interlocking.show_ip_form(pos, pname) end end end -- Returns the aspect the signal at pos is supposed to show function advtrains.interlocking.signal_get_supposed_aspect(pos) local sigd = advtrains.interlocking.db.get_sigd_for_signal(pos) if sigd then local tcbs = advtrains.interlocking.db.get_tcbs(sigd) if tcbs.aspect then return convert_aspect_if_necessary(tcbs.aspect) end end return DANGER; end -- Returns the actual aspect of the signal at position, as returned by the nodedef. -- returns nil when there's no signal at the position function advtrains.interlocking.signal_get_aspect(pos) local node=advtrains.ndb.get_node(pos) local ndef=minetest.registered_nodes[node.name] if ndef and ndef.advtrains and ndef.advtrains.get_aspect then local asp = ndef.advtrains.get_aspect(pos, node) if not asp then asp = DANGER end return convert_aspect_if_necessary(asp) end return nil end -- Returns the "supported_aspects" of the signal at position, as returned by the nodedef. -- returns nil when there's no signal at the position function advtrains.interlocking.signal_get_supported_aspects(pos) local node=advtrains.ndb.get_node(pos) local ndef=minetest.registered_nodes[node.name] if ndef and ndef.advtrains and ndef.advtrains.supported_aspects then local asp = ndef.advtrains.supported_aspects return asp end return nil end local players_assign_ip = {} local function ipmarker(ipos, connid) local node_ok, conns, rhe = advtrains.get_rail_info_at(ipos, advtrains.all_tracktypes) if not node_ok then return end local yaw = advtrains.dir_to_angle(conns[connid].c) -- using tcbmarker here local obj = minetest.add_entity(vector.add(ipos, {x=0, y=0.2, z=0}), "advtrains_interlocking:tcbmarker") if not obj then return end obj:set_yaw(yaw) obj:set_properties({ textures = { "at_il_signal_ip.png" }, }) end -- shows small info form for signal IP state/assignment -- only_notset: show only if it is not set yet (used by signal tcb assignment) function advtrains.interlocking.show_ip_form(pos, pname, only_notset) if not minetest.check_player_privs(pname, "interlocking") then return end local form = "size[7,5]label[0.5,0.5;Signal at "..minetest.pos_to_string(pos).."]" advtrains.interlocking.db.check_for_duplicate_ip(pos) local pts, connid = advtrains.interlocking.db.get_ip_by_signalpos(pos) if pts then form = form.."label[0.5,1.5;Influence point is set at "..pts.."/"..connid.."]" form = form.."button_exit[0.5,2.5; 5,1;set;Move]" form = form.."button_exit[0.5,3.5; 5,1;clear;Clear]" local ipos = minetest.string_to_pos(pts) ipmarker(ipos, connid) else form = form.."label[0.5,1.5;Influence point is not set.]" form = form.."label[0.5,2.0;It is recommended to set an influence point.]" form = form.."label[0.5,2.5;This is the point where trains will obey the signal.]" form = form.."button_exit[0.5,3.5; 5,1;set;Set]" end if not only_notset or not pts then minetest.show_formspec(pname, "at_il_ipassign_"..minetest.pos_to_string(pos), form) end end minetest.register_on_player_receive_fields(function(player, formname, fields) local pname = player:get_player_name() if not minetest.check_player_privs(pname, {train_operator=true, interlocking=true}) then return end local pts = string.match(formname, "^at_il_ipassign_([^_]+)$") local pos if pts then pos = minetest.string_to_pos(pts) end if pos then if fields.set then advtrains.interlocking.signal_init_ip_assign(pos, pname) elseif fields.clear then advtrains.interlocking.db.clear_ip_by_signalpos(pos) end end end) -- inits the signal IP assignment process function advtrains.interlocking.signal_init_ip_assign(pos, pname) if not minetest.check_player_privs(pname, "interlocking") then minetest.chat_send_player(pname, "Insufficient privileges to use this!") return end --remove old IP --advtrains.interlocking.db.clear_ip_by_signalpos(pos) minetest.chat_send_player(pname, "Configuring Signal: Please look in train's driving direction and punch rail to set influence point.") players_assign_ip[pname] = pos end minetest.register_on_punchnode(function(pos, node, player, pointed_thing) local pname = player:get_player_name() if not minetest.check_player_privs(pname, "interlocking") then return end -- IP assignment local signalpos = players_assign_ip[pname] if signalpos then if vector.distance(pos, signalpos)<=50 then local node_ok, conns, rhe = advtrains.get_rail_info_at(pos, advtrains.all_tracktypes) if node_ok and #conns == 2 then local yaw = player:get_look_horizontal() local plconnid = advtrains.yawToClosestConn(yaw, conns) -- add assignment if not already present. local pts = advtrains.roundfloorpts(pos) if not advtrains.interlocking.db.get_ip_signal_asp(pts, plconnid) then advtrains.interlocking.db.set_ip_signal(pts, plconnid, signalpos) ipmarker(pos, plconnid) minetest.chat_send_player(pname, "Configuring Signal: Successfully set influence point") else minetest.chat_send_player(pname, "Configuring Signal: Influence point of another signal is already present!") end else minetest.chat_send_player(pname, "Configuring Signal: This is not a normal two-connection rail! Aborted.") end else minetest.chat_send_player(pname, "Configuring Signal: Node is too far away. Aborted.") end players_assign_ip[pname] = nil end end) --== aspect selector ==-- local players_aspsel = {} --[[ suppasp: "supported_aspects" table purpose: form title string callback: func(pname, aspect) called on form submit isasp: aspect currently set ]] function advtrains.interlocking.show_signal_aspect_selector(pname, p_suppasp, p_purpose, callback, isasp) local suppasp = p_suppasp or { main = {0, -1}, dst = {false}, shunt = false, info = {}, } local purpose = p_purpose or "" local form = "size[7,7]label[0.5,0.5;Select Signal Aspect:]" form = form.."label[0.5,1;"..purpose.."]" form = form.."label[0.5,1.5;== Main Signal ==]" local selid = 1 local entries = {} for idx, spv in ipairs(suppasp.main) do local entry if spv == 0 then entry = "Halt" elseif spv == -1 then entry = "Continue at maximum speed" elseif not spv then entry = "Continue\\, speed limit unchanged (no info)" else entry = "Continue at speed of "..spv end -- hack: the crappy formspec system returns the label, not the index. save the index in it. entries[idx] = idx.."| "..entry if isasp and spv == (isasp.main or false) then selid = idx end end form = form.."dropdown[0.5,2;6;main;"..table.concat(entries, ",")..";"..selid.."]" form = form.."label[0.5,3;== Shunting ==]" if suppasp.shunt == nil then local st = 1 if isasp and isasp.shunt then st=2 end form = form.."dropdown[0.5,3.5;6;shunt_free;---,allowed;"..st.."]" end form = form.."label[0.5,4.5;== Distant Signal ==]" local selid = 1 local entries = {} for idx, spv in ipairs(suppasp.dst) do local entry if spv == 0 then entry = "Expect to stop at the next signal" elseif spv == -1 then entry = "Expect to pass the next signal at maximum speed" elseif not spv then entry = "No info" else entry = string.format("Expect to pass the next signal at speed of %d", spv) end entries[idx] = idx.."| "..entry if isasp and spv == (isasp.dst or false) then selid = idx end end form = form.."dropdown[0.5,5;6;dst;"..table.concat(entries, ",")..";"..selid.."]" form = form.."button_exit[0.5,6;5,1;save;Save signal aspect]" local token = advtrains.random_id() minetest.show_formspec(pname, "at_il_sigaspdia_"..token, form) minetest.after(1, function() players_aspsel[pname] = { suppasp = suppasp, callback = callback, token = token, } end) end local function usebool(sup, val, free) if sup == nil then return val==free else return sup end end -- other side of hack: extract the index local function ddindex(val) return tonumber(string.match(val, "^(%d+)|")) end -- TODO use non-hacky way to parse outputs minetest.register_on_player_receive_fields(function(player, formname, fields) local pname = player:get_player_name() local psl = players_aspsel[pname] if psl then if formname == "at_il_sigaspdia_"..psl.token then if fields.save then local maini = ddindex(fields.main) if not maini then return end local dsti = ddindex(fields.dst) if not dsti then return end local asp = { main = psl.suppasp.main[maini], dst = psl.suppasp.dst[dsti], shunt = usebool(psl.suppasp.shunt, fields.shunt_free, "allowed"), info = {} } psl.callback(pname, asp) end else players_aspsel[pname] = nil end end end)


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