Signal assignment and route programming procedure

15 files changed, 476 insertions, 17 deletions

diff --git a/advtrains/nodedb.lua b/advtrains/nodedb.lua
index 7433042..edb3329 100644
--- a/advtrains/nodedb.lua
+++ b/advtrains/nodedb.lua
@@ -133,7 +133,9 @@ end
 
 
 function ndb.swap_node(pos, node, no_inval)
-	minetest.swap_node(pos, node)
+	if minetest.get_node_or_nil(pos) then
+		minetest.swap_node(pos, node)
+	end
 	ndb.update(pos, node)
 end
 
@@ -294,6 +296,5 @@ minetest.register_chatcommand("at_sync_ndb",
 				return true, text
 			end)
         end,
-        privs = {train_operator=true}, -- Require the "privs" privilege to run
     })
 
diff --git a/advtrains_interlocking/database.lua b/advtrains_interlocking/database.lua
index f4a6871..6c6047f 100644
--- a/advtrains_interlocking/database.lua
+++ b/advtrains_interlocking/database.lua
@@ -95,6 +95,8 @@ local ildb = {}
 local track_circuit_breaks = {}
 local track_sections = {}
 
+local signal_assignments = {}
+
 function ildb.load(data)
 	if not data then return end
 	if data.tcbs then
@@ -103,10 +105,13 @@ function ildb.load(data)
 	if data.ts then
 		track_sections = data.ts
 	end
+	if data.signalass then
+		signal_assignments = data.signalass
+	end
 end
 
 function ildb.save()
-	return {tcbs = track_circuit_breaks, ts=track_sections}
+	return {tcbs = track_circuit_breaks, ts=track_sections, signalass = signal_assignments}
 end
 
 --
@@ -123,6 +128,7 @@ TCB data structure
 	-- while the signal still displays danger and nothing is written to the TCs
 	-- As soon as the route can actually be set, all relevant TCs and turnouts are set and this field
 	-- is set true, clearing the signal
+	aspect = <asp> -- The aspect the signal should show. If this is nil, should show the most restrictive aspect (red)
 },
 [2] = { -- Variant: end of track-circuited area (initial state of TC)
 	ts_id = nil, -- this is the indication for end_of_interlocking
@@ -145,6 +151,11 @@ Track section
 
 Signal specifier (sigd) (a pair of TCB/Side):
 {p = <pos>, s = <1/2>}
+
+Signal Assignments: reverse lookup of signals assigned to TCBs
+signal_assignments = {
+[<signal pts>] = <sigd>
+}
 ]]
 
 
@@ -406,6 +417,19 @@ function ildb.get_ts_at_pos(pos)
 	return nil
 end
 
+
+-- returns the sigd the signal at pos belongs to, if this is known
+function ildb.get_sigd_for_signal(pos)
+	local pts = advtrains.roundfloorpts(pos)
+	return signal_assignments[pts]
+end
+function ildb.set_sigd_for_signal(pos, sigd)
+	local pts = advtrains.roundfloorpts(pos)
+	signal_assignments[pts] = sigd
+end
+
+
+
 advtrains.interlocking.db = ildb
 
 
diff --git a/advtrains_interlocking/demosignals.lua b/advtrains_interlocking/demosignals.lua
index 8320afb..d5d5c4f 100644
--- a/advtrains_interlocking/demosignals.lua
+++ b/advtrains_interlocking/demosignals.lua
@@ -1,13 +1,16 @@
 -- Demonstration signals
 -- Those can display the 3 main aspects of Ks signals
 
+-- Note that the group value of advtrains_signal is 2, which means "step 2 of signal capabilities"
+-- advtrains_signal=1 is meant for signals that do not implement set_aspect.
+
 
 minetest.register_node("advtrains_interlocking:ds_danger", {
 	description = "Demo signal at Danger",
 	tiles = {"at_il_signal_asp_danger.png"},
 	groups = {
 		cracky = 3,
-		advtrains_signal = 1,
+		advtrains_signal = 2,
 		save_in_at_nodedb = 1,
 	},
 	sounds = default.node_sound_stone_defaults(),
@@ -35,7 +38,7 @@ minetest.register_node("advtrains_interlocking:ds_free", {
 	tiles = {"at_il_signal_asp_free.png"},
 	groups = {
 		cracky = 3,
-		advtrains_signal = 1,
+		advtrains_signal = 2,
 		save_in_at_nodedb = 1,
 	},
 	sounds = default.node_sound_stone_defaults(),
@@ -63,7 +66,7 @@ minetest.register_node("advtrains_interlocking:ds_slow", {
 	tiles = {"at_il_signal_asp_slow.png"},
 	groups = {
 		cracky = 3,
-		advtrains_signal = 1,
+		advtrains_signal = 2,
 		save_in_at_nodedb = 1,
 	},
 	sounds = default.node_sound_stone_defaults(),
diff --git a/advtrains_interlocking/init.lua b/advtrains_interlocking/init.lua
index a7138f8..05665e3 100644
--- a/advtrains_interlocking/init.lua
+++ b/advtrains_interlocking/init.lua
@@ -10,3 +10,4 @@ dofile(modpath.."tcb_ts_ui.lua")
 dofile(modpath.."signal_api.lua")
 dofile(modpath.."demosignals.lua")
 dofile(modpath.."train_related.lua")
+dofile(modpath.."route_prog.lua")
diff --git a/advtrains_interlocking/route_prog.lua b/advtrains_interlocking/route_prog.lua
new file mode 100644
index 0000000..72f72ca
--- /dev/null
+++ b/advtrains_interlocking/route_prog.lua
@@ -0,0 +1,323 @@
+-- Route programming system
+
+--[[
+Progamming routes:
+1. Select "program new route" in the signalling dialog
+-> route_start marker will appear to designate route-program mode
+2. Do those actions in any order:
+A. punch a TCB marker node to proceed route along this TCB. This will only work if
+	this is actually a TCB bordering the current TS, and will place a
+	route_set marker and shift to the next TS
+B. right-click a turnout to switch it (no impact to route programming
+C. punch a turnout (or some other passive component) to fix its state (toggle)
+	for the route. A sprite telling "Route Fix" will show that fact.
+3. To complete route setting, use the chat command '/at_program_route <route name>'.
+	The last punched TCB will get a 'route end' marker
+	The end of a route should be at another signal facing the same direction as the entrance signal,
+	however this is not enforced and left up to the signal engineer (the programmer)
+	
+The route visualization will also be used to visualize routes after they have been programmed.
+]]--
+
+
+-- table with objectRefs
+local markerent = {}
+
+minetest.register_entity("advtrains_interlocking:routemarker", {
+	visual = "mesh",
+	mesh = "trackplane.b3d",
+	textures = {"at_il_route_set.png"},
+	collisionbox = {-1,-0.5,-1, 1,-0.4,1},
+	visual_size = {x=10, y=10},
+	on_punch = function(self)
+		self.object:remove()
+	end,
+	get_staticdata = function() return "STATIC" end,
+	on_activate = function(self, sdata) if sdata=="STATIC" then self.object:remove() end end,
+	static_save = false,
+})
+
+
+-- Spawn or update a route marker entity
+-- pos: position where this is going to be
+-- key: something unique to determine which entity to remove if this was set before
+-- img: texture
+local function routemarker(context, pos, key, img, yaw, itex)
+	if not markerent[context] then
+		markerent[context] = {}
+	end
+	if markerent[context][key] then
+		markerent[context][key]:remove()
+	end
+	
+	local obj = minetest.add_entity(vector.add(pos, {x=0, y=0.3, z=0}), "advtrains_interlocking:routemarker")
+	if not obj then return end
+	obj:set_yaw(yaw)
+	obj:set_properties({
+		infotext = itex,
+		textures = {img},
+	})
+	
+	markerent[context][key] = obj
+end
+
+minetest.register_entity("advtrains_interlocking:routesprite", {
+	visual = "sprite",
+	textures = {"at_il_turnout_free.png"},
+	collisionbox = {-0.2,-0.2,-0.2, 0.2,0.2,0.2},
+	visual_size = {x=1, y=1},
+	on_punch = function(self)
+		self.object:remove()
+	end,
+	get_staticdata = function() return "STATIC" end,
+	on_activate = function(self, sdata) if sdata=="STATIC" then self.object:remove() end end,
+	static_save = false,
+})
+
+
+-- Spawn or update a route sprite entity
+-- pos: position where this is going to be
+-- key: something unique to determine which entity to remove if this was set before
+-- img: texture
+local function routesprite(context, pos, key, img, itex)
+	if not markerent[context] then
+		markerent[context] = {}
+	end
+	if markerent[context][key] then
+		markerent[context][key]:remove()
+	end
+	
+	local obj = minetest.add_entity(vector.add(pos, {x=0, y=0, z=0}), "advtrains_interlocking:routesprite")
+	if not obj then return end
+	obj:set_properties({
+		infotext = itex,
+		textures = {img},
+	})
+	
+	markerent[context][key] = obj
+end
+
+--[[
+Route definition:
+route = {
+	name = <string>
+	tcbpath = {
+		[n] = <sigd>
+	}
+	pcfix = {
+		[<pts>] = "state"
+	}
+}
+The first item in the TCB path is always the start signal of this route,
+so this is left out.
+
+
+]]--
+
+function advtrains.interlocking.clear_visu_context(context)
+	if not markerent[context] then return end
+	for key, obj in pairs(markerent[context]) do
+		obj:remove()
+	end
+	markerent[context] = nil
+end
+
+-- visualize route. 'context' is a string that identifies the context of this visualization
+-- e.g. prog_<player> or vis<pts> for later visualizations
+function advtrains.interlocking.visualize_route(origin, route, context)
+	advtrains.interlocking.clear_visu_context(context)
+	for k,sigd in ipairs(route.tcbpath) do
+		local yaw = 0
+		local node_ok, conns, rhe = advtrains.get_rail_info_at(sigd.p, advtrains.all_tracktypes)
+		if node_ok then
+			yaw = advtrains.dir_to_angle(conns[sigd.s].c)
+		end
+		local img = "at_il_route_set.png"
+		if k == #route.tcbpath then img = "at_il_route_end.png" end
+		routemarker(context, sigd.p, "rte"..k, img, yaw, route.name.." #"..k)
+	end
+	for pts, state in pairs(route.pcfix) do
+		local pos = minetest.string_to_pos(pts)
+		routesprite(context, pos, "fix"..pts, "at_il_route_lock.png", "Fixed in state '"..state.."' by route "..route.name)
+	end
+end
+
+
+local player_rte_prog = {}
+
+function advtrains.interlocking.init_route_prog(pname, sigd)
+	player_rte_prog[pname] = {
+		origin = sigd,
+		route = {
+			name = "PROG["..pname.."]",
+			tcbpath = {},
+			pcfix = {},
+		}
+	}
+	minetest.chat_send_player(pname, "Route programming mode active. Punch TCBs to add route segments, punch turnouts to lock them.")
+end
+
+local function get_last_route_item(origin, route)
+	if #route.tcbpath == 0 then
+		return origin
+	end
+	return route.tcbpath[#route.tcbpath]
+end
+
+local function chat(pname, message)
+	minetest.chat_send_player(pname, "[Route programming] "..message)
+end
+local function otherside(s)
+	if s==1 then return 2 else return 1 end
+end
+
+-- Central route programming punch callback
+minetest.register_on_punchnode(function(pos, node, player, pointed_thing)
+	local pname = player:get_player_name()
+	local rp = player_rte_prog[pname]
+	if rp then
+		-- determine what the punched node is
+		if minetest.get_item_group(node.name, "at_il_track_circuit_break") >= 1 then
+			-- get position of the assigned tcb
+			local meta = minetest.get_meta(pos)
+			local tcbpts = meta:get_string("tcb_pos")
+			if tcbpts == "" then 
+				chat(pname, "This TCB is unconfigured, you first need to assign it to a rail")
+				return
+			end
+			local tcbpos = minetest.string_to_pos(tcbpts)
+			
+			-- track circuit break, try to advance route over it
+			local lri = get_last_route_item(rp.origin, rp.route)
+			if vector.equals(lri.p, tcbpos) then
+				chat(pname, "You cannot continue the route to where you came from!")
+				return
+			end
+			
+			local start_tcbs = advtrains.interlocking.db.get_tcbs(lri)
+			if not start_tcbs.ts_id then
+				chat(pname, "The previous TCB was End of Interlocking. Please complete route programming using '/at_rp_set <name>'")
+				return
+			end
+			
+			local ts = advtrains.interlocking.db.get_ts(start_tcbs.ts_id)
+			if not ts then atwarn("Internal error, ts inexistant for id!") return end
+			local found = nil
+			for _,sigd in ipairs(ts.tc_breaks) do
+				if vector.equals(sigd.p, tcbpos) then
+					found = otherside(sigd.s)
+				end
+			end
+			if not found then
+				chat(pname, "Previous and this TCB belong to different track sections!")
+				return
+			end
+			-- everything worked, just add the other side to the list
+			table.insert(rp.route.tcbpath, {p = tcbpos, s = found})
+			chat(pname, "Added track section '"..ts.name.."' to the route (revert with /at_rp_back)")
+			advtrains.interlocking.visualize_route(rp.origin, rp.route, "prog_"..pname)
+			return
+		end
+		local ndef = minetest.registered_nodes[node.name]
+		if ndef and ndef.luaautomation and ndef.luaautomation.getstate then
+			local pts = advtrains.roundfloorpts(pos)
+			if rp.route.pcfix[pts] then
+				rp.route.pcfix[pts] = nil
+				chat(pname, pts.." is no longer affected when this route is set.")
+			else
+				local state = ndef.luaautomation.getstate
+				if type(state)=="function" then
+					state = state(pos, node)
+				end
+				rp.route.pcfix[pts] = state
+				chat(pname, pts.." is held in "..state.." position when this route is set.")
+			end
+			advtrains.interlocking.visualize_route(rp.origin, rp.route, "prog_"..pname)
+			return
+		end
+		
+	end
+end)
+
+minetest.register_chatcommand("at_rp_set",
+	{
+        params = "<name>", -- Short parameter description
+        description = "Completes route programming procedure", -- Full description
+        privs = {}, -- TODO
+        func = function(pname, param)
+			return advtrains.pcall(function()
+				if param=="" then
+					return false, "Missing name parameter!" 
+				end
+				local rp = player_rte_prog[pname]
+				if rp then
+					if #rp.route.tcbpath <= 0 then
+						return false, "Cannot program route without a target"
+					end
+					rp.route.name = param
+					-- TODO save that route somewhere in origin
+					atdebug("ROUTE RESULT:",rp)
+					advtrains.interlocking.clear_visu_context("prog_"..pname)
+					return true, "Successfully programmed route" 
+				end
+				return false, "You were not programming a route!" 
+			end)
+        end,
+    })
+    
+minetest.register_chatcommand("at_rp_back",
+	{
+        params = "", -- Short parameter description
+        description = "Remove last route segment", -- Full description
+        privs = {}, -- Require the "privs" privilege to run
+        func = function(pname, param)
+			return advtrains.pcall(function()
+				local rp = player_rte_prog[pname]
+				if rp then
+					if #rp.route.tcbpath <= 0 then
+						return false, "Cannot backtrack when there are no route elements"
+					end
+					rp.route.tcbpath[#rp.route.tcbpath] = nil
+					advtrains.interlocking.visualize_route(rp.origin, rp.route, "prog_"..pname)
+					return true, "Route section "..(#rp.route.tcbpath+1).." removed." 
+				end
+				return false, "You were not programming a route!" 
+			end)
+        end,
+    })
+minetest.register_chatcommand("at_rp_mark",
+	{
+        params = "", -- Short parameter description
+        description = "Re-set route programming markers", -- Full description
+        privs = {}, -- TODO
+        func = function(pname, param)
+			return advtrains.pcall(function()
+				local rp = player_rte_prog[pname]
+				if rp then
+					advtrains.interlocking.visualize_route(rp.origin, rp.route, "prog_"..pname)
+					return true, "Redrawn route markers" 
+				end
+				return false, "You were not programming a route!" 
+			end)
+        end,
+    })
+minetest.register_chatcommand("at_rp_discard",
+	{
+        params = "", -- Short parameter description
+        description = "Discards the currently programmed route", -- Full description
+        privs = {}, -- Require the "privs" privilege to run
+        func = function(pname, param)
+			return advtrains.pcall(function()
+				player_rte_prog[pname] = nil
+				advtrains.interlocking.clear_visu_context("prog_"..pname)
+				return true, "Route discarded" 
+			end)
+        end,
+    })
+
+
+--TODO on route setting
+-- locked turnouts need to somehow know the TS they're associated to, which isn't possible with the current route programming and saving method
+-- unify luaautomation get/setstate interface to the core
+-- privileges for route programming
+-- for now, that locking aspect will be ignored and turnouts just set when route gets commited.
diff --git a/advtrains_interlocking/signal_api.lua b/advtrains_interlocking/signal_api.lua
index e072273..17799ae 100644
--- a/advtrains_interlocking/signal_api.lua
+++ b/advtrains_interlocking/signal_api.lua
@@ -33,6 +33,21 @@ on_rightclick = advtrains.interlocking.signal_rc_handler
 
 ]]--
 
+local DANGER = {
+	main = {
+		free = false,
+		speed = 0,
+	},
+	shunt = {
+		free = false,
+	},
+	dst = {
+		free = false,
+		speed = 0,
+	},
+	info = {}
+}
+
 function advtrains.interlocking.signal_set_aspect(pos, asp)
 	local node=advtrains.ndb.get_node(pos)
 	local ndef=minetest.registered_nodes[node.name]
@@ -43,7 +58,13 @@ end
 
 function advtrains.interlocking.signal_rc_handler(pos, node, player, itemstack, pointed_thing)
 	local pname = player:get_player_name()
-	minetest.show_formspec(pname, "at_il_sigasp_"..minetest.pos_to_string(pos), "field[aspect;Set Aspect (F/D)Speed(F/D)Speed(F/D);D0D0D]")
+	local sigd = advtrains.interlocking.db.get_sigd_for_signal(pos)
+	if sigd then
+		advtrains.interlocking.show_signalling_form(sigd, pname)
+	else
+		-- permit to set aspect manually
+		minetest.show_formspec(pname, "at_il_sigasp_"..minetest.pos_to_string(pos), "field[aspect;Set Aspect (F/D)Speed(F/D)Speed(F/D);D0D0D]")
+	end
 end
 
 minetest.register_on_player_receive_fields(function(player, formname, fields)
@@ -73,3 +94,15 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		advtrains.interlocking.signal_set_aspect(pos, asp)
 	end
 end)
+
+-- Returns the aspect the signal at pos is supposed to show
+function advtrains.interlocking.signal_get_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 tcbs.aspect
+		end
+	end
+	return DANGER;
+end
diff --git a/advtrains_interlocking/tcb_ts_ui.lua b/advtrains_interlocking/tcb_ts_ui.lua
index 0ebe767..454e2c4 100644
--- a/advtrains_interlocking/tcb_ts_ui.lua
+++ b/advtrains_interlocking/tcb_ts_ui.lua
@@ -1,6 +1,7 @@
 -- Track Circuit Breaks and Track Sections - Player interaction
 
 local players_assign_tcb = {}
+local players_assign_signal = {}
 local players_link_ts = {}
 
 local lntrans = { "A", "B" }
@@ -26,6 +27,7 @@ minetest.register_node("advtrains_interlocking:tcb_node", {
 		cracky=3,
 		not_blocking_trains=1,
 		--save_in_at_nodedb=2,
+		at_il_track_circuit_break = 1,
 	},
 	after_place_node = function(pos, node, player)
 		local meta = minetest.get_meta(pos)
@@ -46,14 +48,14 @@ minetest.register_node("advtrains_interlocking:tcb_node", {
 			players_assign_tcb[pname] = pos
 		end	
 	end,
-	on_punch = function(pos, node, player)
-		local meta = minetest.get_meta(pos)
-		local tcbpts = meta:get_string("tcb_pos")
-		if tcbpts ~= "" then
-			local tcbpos = minetest.string_to_pos(tcbpts)
-			advtrains.interlocking.show_tcb_marker(tcbpos)
-		end	
-	end,
+	--on_punch = function(pos, node, player)
+	--	local meta = minetest.get_meta(pos)
+	--	local tcbpts = meta:get_string("tcb_pos")
+	--	if tcbpts ~= "" then
+	--		local tcbpos = minetest.string_to_pos(tcbpts)
+	--		advtrains.interlocking.show_tcb_marker(tcbpos)
+	--	end	
+	--end,
 	can_dig = function(pos, player)
 		-- Those markers can only be dug when all adjacent TS's are set
 		-- as EOI.
@@ -83,6 +85,7 @@ minetest.register_node("advtrains_interlocking:tcb_node", {
 
 minetest.register_on_punchnode(function(pos, node, player, pointed_thing)
 	local pname = player:get_player_name()
+	-- TCB assignment
 	local tcbnpos = players_assign_tcb[pname]
 	if tcbnpos then
 		if vector.distance(pos, tcbnpos)<=20 then
@@ -109,6 +112,29 @@ minetest.register_on_punchnode(function(pos, node, player, pointed_thing)
 		end
 		players_assign_tcb[pname] = nil
 	end
+	
+	-- Signal assignment
+	local sigd = players_assign_signal[pname]
+	if sigd then
+		if vector.distance(pos, sigd.p)<=50 then
+			local is_signal = minetest.get_item_group(node.name, "advtrains_signal") >= 2
+			if is_signal then
+				local tcbs = advtrains.interlocking.db.get_tcbs(sigd)
+				if tcbs then
+					tcbs.signal = pos
+					advtrains.interlocking.db.set_sigd_for_signal(pos, sigd)
+					minetest.chat_send_player(pname, "Configuring TCB: Successfully assigned signal.")
+				else
+					minetest.chat_send_player(pname, "Configuring TCB: Internal error, TCBS doesn't exist. Aborted.")
+				end
+			else
+				minetest.chat_send_player(pname, "Configuring TCB: Not a compatible signal. Aborted.")
+			end
+		else
+			minetest.chat_send_player(pname, "Configuring TCB: Node is too far away. Aborted.")
+		end
+		players_assign_tcb[pname] = nil
+	end
 end)
 
 
@@ -135,6 +161,11 @@ local function mktcbformspec(tcbs, btnpref, offset, pname)
 			form = form.."button[0.5,"..(offset+1.5)..";5,1;"..btnpref.."_setfree;Section is blocked]"		
 		end
 	end
+	if tcbs.signal then
+		form = form.."button[0.5,"..(offset+2.5)..";5,1;"..btnpref.."_sigdia;Signalling]"	
+	else
+		form = form.."button[0.5,"..(offset+2.5)..";5,1;"..btnpref.."_asnsig;Assign a signal]"
+	end
 	return form
 end
 
@@ -143,9 +174,9 @@ function advtrains.interlocking.show_tcb_form(pos, pname)
 	local tcb = advtrains.interlocking.db.get_tcb(pos)
 	if not tcb then return end
 	
-	local form = "size[6,7] label[0.5,0.5;Track Circuit Break Configuration]"
+	local form = "size[6,9] label[0.5,0.5;Track Circuit Break Configuration]"
 	form = form .. mktcbformspec(tcb[1], "A", 1, pname)
-	form = form .. mktcbformspec(tcb[2], "B", 4, pname)
+	form = form .. mktcbformspec(tcb[2], "B", 5, pname)
 	
 	minetest.show_formspec(pname, "at_il_tcbconfig_"..minetest.pos_to_string(pos), form)
 	advtrains.interlocking.show_tcb_marker(pos)
@@ -174,6 +205,8 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		local f_makeil = {fields.A_makeil, fields.B_makeil}
 		local f_setlocked = {fields.A_setlocked, fields.B_setlocked}
 		local f_setfree = {fields.A_setfree, fields.B_setfree}
+		local f_asnsig = {fields.A_asnsig, fields.B_asnsig}
+		local f_sigdia = {fields.A_sigdia, fields.B_sigdia}
 		
 		for connid=1,2 do
 			local tcbs = tcb[connid]
@@ -201,6 +234,17 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 					tcbs.section_free = nil
 				end
 			end
+			if f_asnsig[connid] and not tcbs.signal then
+				minetest.chat_send_player(pname, "Configuring TCB: Please punch the signal to assign.")
+				players_assign_signal[pname] = {p=pos, s=connid}
+				minetest.close_formspec(pname, formname)
+				return
+			end
+			if f_sigdia[connid] and tcbs.signal then
+				advtrains.interlocking.show_signalling_form({p=pos, s=connid}, pname)
+				return
+			end
+
 		end
 		advtrains.interlocking.show_tcb_form(pos, pname)
 	end
@@ -373,3 +417,33 @@ function advtrains.interlocking.show_tcb_marker(pos)
 	
 	markerent[pts] = obj
 end
+
+-- Signalling formspec - set routes a.s.o
+
+function advtrains.interlocking.show_signalling_form(sigd, pname)
+	local form = "size[10,10]label[0.5,0.5;Track Section Detail - ]"
+	form = form.."field[0.8,2;5.2,1;name;Section name;]"
+	form = form.."button[5.5,1.7;1,1;setname;Set]"
+	
+	--minetest.show_formspec(pname, "at_il_signalling_"..sigd.p.."_"..sigd.s, form)
+	--TODO this is temporary
+	advtrains.interlocking.init_route_prog(pname, sigd)
+end
+
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	local pname = player:get_player_name()
+	local pts, connids = string.match(formname, "^at_il_signalling_([^_]+)_(%d)$")
+	local pts = string.match(formname, "^at_il_tcbconfig_(.+)$")
+	local pos, connid
+	if pts then
+		pos = minetest.string_to_pos(pts)
+		connid = tonumber(connids)
+		if not connid or connid<1 or connid>2 then return end
+	end
+	if pos and connid and not fields.quit then
+		
+		advtrains.interlocking.show_signalling_form(ts_id, pname, sel_tcb)
+	end
+
+end)
diff --git a/advtrains_interlocking/textures/at_il_route_end.png b/advtrains_interlocking/textures/at_il_route_end.png
new file mode 100644
index 0000000..1433f0c
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_route_end.png
diff --git a/advtrains_interlocking/textures/at_il_route_lock.png b/advtrains_interlocking/textures/at_il_route_lock.png
new file mode 100644
index 0000000..57eba71
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_route_lock.png
diff --git a/advtrains_interlocking/textures/at_il_route_set.png b/advtrains_interlocking/textures/at_il_route_set.png
new file mode 100644
index 0000000..3531420
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_route_set.png
diff --git a/advtrains_interlocking/textures/at_il_route_start.png b/advtrains_interlocking/textures/at_il_route_start.png
new file mode 100644
index 0000000..dcb5160
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_route_start.png
diff --git a/advtrains_interlocking/textures/at_il_turnout_cr_l.png b/advtrains_interlocking/textures/at_il_turnout_cr_l.png
new file mode 100644
index 0000000..fb79e3d
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_turnout_cr_l.png
diff --git a/advtrains_interlocking/textures/at_il_turnout_cr_r.png b/advtrains_interlocking/textures/at_il_turnout_cr_r.png
new file mode 100644
index 0000000..e04dfbd
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_turnout_cr_r.png
diff --git a/advtrains_interlocking/textures/at_il_turnout_free.png b/advtrains_interlocking/textures/at_il_turnout_free.png
new file mode 100644
index 0000000..5c83193
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_turnout_free.png
diff --git a/advtrains_interlocking/textures/at_il_turnout_st.png b/advtrains_interlocking/textures/at_il_turnout_st.png
new file mode 100644
index 0000000..50d5ad5
--- /dev/null
+++ b/advtrains_interlocking/textures/at_il_turnout_st.png