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advtrains/advtrains_interlocking/route_prog.lua

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-- 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)
if self.callback then
self.callback()
end
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, callback)
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},
})
if callback then
obj:get_luaentity().callback = callback
end
markerent[context][key] = obj
end
--[[
Route definition:
route = {
name = <string>
[n] = {
next = <sigd>, -- of the next (note: next) TCB on the route
locks = {<pts> = "state"} -- route locks of this route segment
}
terminal =
}
The first item in the TCB path (namely i=0) is always the start signal of this route,
so this is left out.
All subsequent entries, starting from 1, contain:
- all route locks of the segment on TS between the (i-1). and the i. TCB
- the next TCB signal describer in proceeding direction of the route.
'Terminal' once again repeats the "next" entry of the last route segment.
It is needed for distant signal aspect determination. If it is not set,
the distant signal aspect is determined as DANGER.
]]--
local function chat(pname, message)
minetest.chat_send_player(pname, "[Route programming] "..message)
end
local function clear_lock(locks, pname, pts)
locks[pts] = nil
chat(pname, pts.." is no longer affected when this route is set.")
end
local function otherside(s)
if s==1 then return 2 else return 1 end
end
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
-- last 2 parameters are only to be used in the context of route programming!
function advtrains.interlocking.visualize_route(origin, route, context, tmp_lcks, pname)
advtrains.interlocking.clear_visu_context(context)
local oyaw = 0
local onode_ok, oconns, orhe = advtrains.get_rail_info_at(origin.p, advtrains.all_tracktypes)
if onode_ok then
oyaw = advtrains.dir_to_angle(oconns[origin.s].c)
end
routemarker(context, origin.p, "rte_origin", "at_il_route_start.png", oyaw, route.name)
local c_sigd = origin
for k,v in ipairs(route) do
c_sigd = v.next
-- display route path
-- Final "next" marker can be EOI, thus undefined. This is legitimate.
if c_sigd then
local yaw = 0
local node_ok, conns, rhe = advtrains.get_rail_info_at(c_sigd.p, advtrains.all_tracktypes)
if node_ok then
yaw = advtrains.dir_to_angle(conns[c_sigd.s].c)
end
local img = "at_il_route_set.png"
if k==#route and not tmp_lcks then
img = "at_il_route_end.png"
end
routemarker(context, c_sigd.p, "rte"..k, img, yaw, route.name.." #"..k)
end
-- display locks
for pts, state in pairs(v.locks) do
local pos = minetest.string_to_pos(pts)
routesprite(context, pos, "fix"..k..pts, "at_il_route_lock.png", "Fixed in state '"..state.."' by route "..route.name.." until segment #"..k.." is freed.")
end
end
-- The presence of tmp_lcks tells us that we are displaying during route programming.
if tmp_lcks then
-- display route end markers at appropriate places (check next TS, if it exists)
local terminal = c_sigd
if terminal then
local term_tcbs = advtrains.interlocking.db.get_tcbs(terminal)
if term_tcbs.ts_id then
local over_ts = advtrains.interlocking.db.get_ts(term_tcbs.ts_id)
for i, sigd in ipairs(over_ts.tc_breaks) do
if not vector.equals(sigd.p, terminal.p) then
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[otherside(sigd.s)].c)
end
routemarker(context, sigd.p, "rteterm"..i, "at_il_route_end.png", yaw, route.name.." Terminal "..i)
end
end
end
end
-- display locks set by player
for pts, state in pairs(tmp_lcks) do
local pos = minetest.string_to_pos(pts)
routesprite(context, pos, "fixp"..pts, "at_il_route_lock_edit.png", "Fixed in state '"..state.."' by route "..route.name.." (punch to unfix)",
function() clear_lock(tmp_lcks, pname, pts) end)
end
end
end
local player_rte_prog = {}
function advtrains.interlocking.init_route_prog(pname, sigd)
if not minetest.check_player_privs(pname, "interlocking") then
minetest.chat_send_player(pname, "Insufficient privileges to use this!")
return
end
player_rte_prog[pname] = {
origin = sigd,
route = {
name = "PROG["..pname.."]",
},
tmp_lcks = {},
}
advtrains.interlocking.visualize_route(sigd, player_rte_prog[pname].route, "prog_"..pname, player_rte_prog[pname].tmp_lcks, pname)
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 == 0 then
return origin
end
return route[#route].next
end
local function do_advance_route(pname, rp, sigd, tsname)
table.insert(rp.route, {next = sigd, locks = rp.tmp_lcks})
rp.tmp_lcks = {}
chat(pname, "Added track section '"..tsname.."' to the route.")
end
local function finishrpform(pname)
local rp = player_rte_prog[pname]
if not rp then return end
local form = "size[7,6]label[0.5,0.5;Finish programming route]"
local terminal = get_last_route_item(rp.origin, rp.route)
if terminal then
local term_tcbs = advtrains.interlocking.db.get_tcbs(terminal)
if term_tcbs.signal then
form = form .. "label[0.5,1.5;Route ends at signal:]"
form = form .. "label[0.5,2 ;"..term_tcbs.signal_name.."]"
else
form = form .. "label[0.5,1.5;WARNING: Route does not end at a signal.]"
form = form .. "label[0.5,2 ;Routes should in most cases end at signals.]"
form = form .. "label[0.5,2.5;Cancel if you are unsure!]"
end
else
form = form .. "label[0.5,1.5;Route leads into]"
form = form .. "label[0.5,2 ;non-interlocked area]"
end
form = form.."field[0.8,3.5;5.2,1;name;Enter Route Name;]"
form = form.."button_exit[0.5,4.5; 5,1;save;Save Route]"
minetest.show_formspec(pname, "at_il_routepf", form)
end
local function check_advance_valid(tcbpos, rp)
-- track circuit break, try to advance route over it
local lri = get_last_route_item(rp.origin, rp.route)
if not lri then
return false, false
end
local is_endpoint = false
local this_sigd, this_ts, adv_side
if vector.equals(lri.p, tcbpos) then
-- If the player just punched the last TCB again, it's of course possible to
-- finish the route here (although it can't be advanced by here.
-- Fun fact: you can now program routes that end exactly where they begin :)
is_endpoint = true
this_sigd = lri
else
-- else, we need to check whether this TS actually borders
local start_tcbs = advtrains.interlocking.db.get_tcbs(lri)
if not start_tcbs.ts_id then
return false, false
end
this_ts = advtrains.interlocking.db.get_ts(start_tcbs.ts_id)
for _,sigd in ipairs(this_ts.tc_breaks) do
if vector.equals(sigd.p, tcbpos) then
adv_side = otherside(sigd.s)
end
end
if not adv_side then
-- this TCB is not bordering to the section
return false, false
end
this_sigd = {p=tcbpos, s=adv_side}
end
-- check whether the ts at the other end is capable of "end over"
local adv_tcbs = advtrains.interlocking.db.get_tcbs(this_sigd)
local next_tsid = adv_tcbs.ts_id
local can_over, over_ts, next_tc_bs = false, nil, nil
local cannotover_rsn = "Next section is diverging (>2 TCBs)"
if next_tsid then
-- you may not advance over EOI. While this is technically possible,
-- in practise this just enters an unnecessary extra empty route item.
over_ts = advtrains.interlocking.db.get_ts(adv_tcbs.ts_id)
next_tc_bs = over_ts.tc_breaks
can_over = #next_tc_bs <= 2
else
cannotover_rsn = "End of interlocking"
end
local over_sigd = nil
if can_over then
if next_tc_bs and #next_tc_bs == 2 then
local sdt
if vector.equals(next_tc_bs[1].p, tcbpos) then
sdt = next_tc_bs[2]
end
if vector.equals(next_tc_bs[2].p, tcbpos) then
sdt = next_tc_bs[1]
end
if not sdt then
error("Inconsistency: "..dump(next_ts))
end
-- swap TCB direction
over_sigd = {p = sdt.p, s = otherside(sdt.s) }
end
end
return is_endpoint, true, this_sigd, this_ts, can_over, over_ts, over_sigd, cannotover_rsn
end
local function show_routing_form(pname, tcbpos, message)
local rp = player_rte_prog[pname]
if not rp then return end
local is_endpoint, advance_valid, this_sigd, this_ts, can_over, over_ts, over_sigd, cannotover_rsn = check_advance_valid(tcbpos, rp)
-- at this place, advance_valid shows whether the current route can be advanced
-- over this TCB.
-- If it can:
-- Advance over (continue programming)
-- End here
-- Advance and end (only <=2 TCBs, terminal signal needs to be known)
-- if not:
-- show nothing at all
-- In all cases, Discard and Backtrack buttons needed.
local form = "size[7,9.5]label[0.5,0.5;Advance/Complete Route]"
if message then
form = form .. "label[0.5,1;"..message.."]"
end
if advance_valid and not is_endpoint then
form = form.. "label[0.5,1.8;Advance to next route section]"
form = form.."image_button[0.5,2.2; 5,1;at_il_routep_advance.png;advance;]"
form = form.. "label[0.5,3.5;-------------------------]"
else
form = form.. "label[0.5,2.3;This TCB is not suitable as]"
form = form.. "label[0.5,2.8;route continuation.]"
end
if advance_valid or is_endpoint then
form = form.. "label[0.5,3.8;Finish route HERE]"
form = form.."image_button[0.5, 4.2; 5,1;at_il_routep_end_here.png;endhere;]"
if can_over then
form = form.. "label[0.5,5.3;Finish route at end of NEXT section]"
form = form.."image_button[0.5,5.7; 5,1;at_il_routep_end_over.png;endover;]"
else
form = form.. "label[0.5,5.3;Advancing over next section is]"
form = form.. "label[0.5,5.8;impossible at this place.]"
if cannotover_rsn then
form = form.. "label[0.5,6.3;"..cannotover_rsn.."]"
end
end
end
form = form.. "label[0.5,7;-------------------------]"
if #rp.route > 0 then
form = form.."button[0.5,7.4; 5,1;retract;Step back one section]"
end
form = form.."button[0.5,8.4; 5,1;cancel;Cancel route programming]"
minetest.show_formspec(pname, "at_il_rprog_"..minetest.pos_to_string(tcbpos), form)
end
minetest.register_on_player_receive_fields(function(player, formname, fields)
local pname = player:get_player_name()
local tcbpts = string.match(formname, "^at_il_rprog_([^_]+)$")
local tcbpos
if tcbpts then
tcbpos = minetest.string_to_pos(tcbpts)
end
if tcbpos then
-- RPROG form
local rp = player_rte_prog[pname]
if not rp then
minetest.close_formspec(pname, formname)
return
end
local is_endpoint, advance_valid, this_sigd, this_ts, can_over, over_ts, over_sigd = check_advance_valid(tcbpos, rp)
if advance_valid then
if fields.advance then
-- advance route
if not is_endpoint then
do_advance_route(pname, rp, this_sigd, this_ts.name)
end
end
if fields.endhere then
if not is_endpoint then
do_advance_route(pname, rp, this_sigd, this_ts.name)
end
finishrpform(pname)
end
if can_over and fields.endover then
if not is_endpoint then
do_advance_route(pname, rp, this_sigd, this_ts.name)
end
do_advance_route(pname, rp, over_sigd, over_ts and over_ts.name or "--EOI--")
finishrpform(pname)
end
end
if fields.retract then
if #rp.route <= 0 then
minetest.close_formspec(pname, formname)
return
end
rp.tmp_locks = rp.route[#rp.route].locks
rp.route[#rp.route] = nil
chat(pname, "Route section "..(#rp.route+1).." removed.")
end
if fields.cancel then
player_rte_prog[pname] = nil
advtrains.interlocking.clear_visu_context("prog_"..pname)
chat(pname, "Route discarded.")
minetest.close_formspec(pname, formname)
return
end
advtrains.interlocking.visualize_route(rp.origin, rp.route, "prog_"..pname, rp.tmp_lcks, pname)
minetest.close_formspec(pname, formname)
return
end
if formname == "at_il_routepf" then
if not fields.save or not fields.name then return end
if fields.name == "" then
-- show form again
finishrpform(pname)
return
end
local rp = player_rte_prog[pname]
if rp then
if #rp.route <= 0 then
chat(pname, "Cannot program route without a target")
return
end
local tcbs = advtrains.interlocking.db.get_tcbs(rp.origin)
if not tcbs then
chat(pname, "The origin TCB has become unknown during programming. Try again.")
return
end
local terminal = get_last_route_item(rp.origin, rp.route)
rp.route.terminal = terminal
rp.route.name = fields.name
table.insert(tcbs.routes, rp.route)
advtrains.interlocking.clear_visu_context("prog_"..pname)
player_rte_prog[pname] = nil
chat(pname, "Successfully programmed route.")
advtrains.interlocking.show_route_edit_form(pname, rp.origin, #tcbs.routes)
return
end
end
end)
-- Central route programming punch callback
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
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)
-- show formspec
show_routing_form(pname, tcbpos)
advtrains.interlocking.visualize_route(rp.origin, rp.route, "prog_"..pname, rp.tmp_lcks, pname)
return
end
if advtrains.is_passive(pos) then
local pts = advtrains.roundfloorpts(pos)
if rp.tmp_lcks[pts] then
clear_lock(rp.tmp_lcks, pname, pts)
else
local state = advtrains.getstate(pos)
rp.tmp_lcks[pts] = state
chat(pname, pts.." is held in "..state.." position when this route is set and freed ")
end
advtrains.interlocking.visualize_route(rp.origin, rp.route, "prog_"..pname, rp.tmp_lcks, pname)
return
end
end
end)
--TODO on route setting
-- routes should end at signals. complete route setting by punching a signal, and command as exceptional route completion
-- Create simpler way to advance a route to the next tcb/signal on simple sections without turnouts
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