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path: root/advtrains_interlocking/tsr_rail.lua
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-- tsr_rail.lua
-- Point speed restriction rails
-- Simple rail whose only purpose is to place a TSR on the position, as a temporary solution until the timetable system covers everything.
-- This code resembles the code in lines/stoprail.lua

local function updateform(pos)
	local meta = minetest.get_meta(pos)
	local pe = advtrains.encode_pos(pos)
	local npr = advtrains.interlocking.npr_rails[pe] or 2
	
	meta:set_string("infotext", "Point speed restriction: "..npr)
	meta:set_string("formspec", "field[npr;Set point speed restriction:;"..npr.."]")
end


local adefunc = function(def, preset, suffix, rotation)
		return {
			after_place_node=function(pos)
				updateform(pos)
			end,
			after_dig_node=function(pos)
				local pe = advtrains.encode_pos(pos)
				advtrains.interlocking.npr_rails[pe] = nil
			end,
			on_receive_fields = function(pos, formname, fields, player)
				if fields.npr then
					local pe = advtrains.encode_pos(pos)
					advtrains.interlocking.npr_rails[pe] = tonumber(fields.npr)
					updateform(pos)
				end
			end,
			advtrains = {
				on_train_approach = function(pos,train_id, train, index)
					if train.path_cn[index] == 1 then
						local pe = advtrains.encode_pos(pos)
						local npr = advtrains.interlocking.npr_rails[pe] or 2
						advtrains.lzb_add_checkpoint(train, index, npr, nil)
					end
				end,
			},
		}
end



advtrains.register_tracks("default", {
	nodename_prefix="advtrains_interlocking:dtrack_npr",
	texture_prefix="advtrains_dtrack_npr",
	models_prefix="advtrains_dtrack",
	models_suffix=".b3d",
	shared_texture="advtrains_dtrack_shared_npr.png",
	description="Point Speed Restriction Rail",
	formats={},
	get_additional_definiton = adefunc,
}, advtrains.trackpresets.t_30deg_straightonly)
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-- Ks signals
-- Can display main aspects (no Zs) + Sht

-- ask engine for translator instance, this will load the translation files
local S = core.get_translator("advtrains_signals_ks")

-- 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.

local function asp_to_zs3type(asp)
	local n = tonumber(asp)
	if not n or n < 4 then return "off" end
	if n < 8 then return 2*math.floor(n/2) end
	return math.min(16,4*math.floor(n/4))
end

local function setzs3(msp, asp, rot)
	local pos = {x = msp.x, y = msp.y+1, z = msp.z}
	local node = advtrains.ndb.get_node(pos)
	if node.name:find("^advtrains_signals_ks:zs3_") then
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:zs3_"..asp.."_"..rot, param2 = node.param2})
	end
end

local function getzs3(msp)
	local pos = {x = msp.x, y = msp.y+1, z = msp.z}
	local nodename = advtrains.ndb.get_node(pos).name
	local speed = nodename:match("^advtrains_signals_ks:zs3_(%w+)_%d+$")
	if not speed then return nil end
	speed = tonumber(speed)
	if not speed then return false end
	return speed
end

local function setzs3v(msp, lim, rot)
	local pos = {x = msp.x, y = msp.y-1, z = msp.z}
	local node = advtrains.ndb.get_node(pos)
	local asp = asp_to_zs3type(lim)
	if node.name:find("^advtrains_signals_ks:zs3v_") then
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:zs3v_"..asp.."_"..rot, param2 = node.param2})
	end
end

local function getzs3v(msp)
	local pos = {x = msp.x, y = msp.y-1, z = msp.z}
	local nodename = advtrains.ndb.get_node(pos).name
	local speed = nodename:match("^advtrains_signals_ks:zs3v_(%w+)_%d+$")
	if not speed then return nil end
	speed = tonumber(speed)
	if not speed then return false end
	return speed
end

local applyaspectf_main = function(rot)
 return function(pos, node, main_aspect, dst_aspect, dst_aspect_info)
	if main_aspect.halt then
		-- halt aspect, set red and don't do anything further
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:hs_danger_"..rot, param2 = node.param2})
		setzs3(pos, "off", rot)
		setzs3v(pos, nil, rot)
		return
	end
	-- set zs3 signal to show speed according to main_aspect
	setzs3(pos, main_aspect.zs3, rot)
	-- select appropriate lamps based on mainaspect and dst
	if main_aspect.shunt then
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:hs_shunt_"..rot, param2 = node.param2})
		setzs3v(pos, nil, rot)
	else
		if not dst_aspect_info
				or not dst_aspect_info.main
				or dst_aspect_info.main == -1 then
			advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:hs_free_"..rot, param2 = node.param2})
			setzs3v(pos, nil, rot)
		elseif dst_aspect_info.main == 0 then
			advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:hs_slow_"..rot, param2 = node.param2})
			setzs3v(pos, nil, rot)
		else
			advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:hs_nextslow_"..rot, param2 = node.param2})
			setzs3v(pos, dst_aspect_info.main, rot)
		end
	end
 end
end

-- Main aspects main signal
-- These aspects tell only the speed signalization at this signal.
-- Actual signal aspect is chosen based on this and the Dst signal.
local mainaspects_main = {
	{
		name = "proceed",
		description = S("Proceed"),
		zs3 = "off"
	},
	{
		name = "shunt",
		description = S("Shunt"),
		zs3 = "off",
		shunt = true,
	},
	{
		name = "proceed_16",
		description = S("Proceed (speed 16)"),
		zs3 = "16",
	},
	{
		name = "proceed_12",
		description = S("Proceed (speed 12)"),
		zs3 = "12",
	},
	{
		name = "proceed_8",
		description = S("Proceed (speed 8)"),
		zs3 = "8",
	},
	{
		name = "proceed_6",
		description = S("Proceed (speed 6)"),
		zs3 = "6",
	},
	{
		name = "proceed_4",
		description = S("Proceed (speed 4)"),
		zs3 = "4",
	},
}

local applyaspectf_distant = function(rot)
 return function(pos, node, main_aspect, dst_aspect, dst_aspect_info)
	if main_aspect.halt then
		-- halt aspect, set red and don't do anything further
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:vs_slow_"..rot, param2 = node.param2})
		setzs3v(pos, nil, rot)
		return
	end
	-- select appropriate lamps based on mainaspect and dst
	if not dst_aspect_info
			or not dst_aspect_info.main
			or dst_aspect_info.main == -1 then
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:vs_free_"..rot, param2 = node.param2})
		setzs3v(pos, nil, rot)
	elseif dst_aspect_info.main == 0 then
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:vs_slow_"..rot, param2 = node.param2})
		setzs3v(pos, nil, rot)
	else
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:vs_nextslow_"..rot, param2 = node.param2})
		setzs3v(pos, dst_aspect_info.main, rot)
	end
 end
end

-- Main aspects distant signal
-- Only one aspect for "expect free". Whether green or yellow lamp is shown and which speed indicator is determined by remote signal
local mainaspects_dst = {
	{
		name = "expectclear",
		description = S("Expect Clear"),
	},
}

--Rangiersignal
local applyaspectf_ra = function(rot)
 -- we get here the full main_aspect table
 return function(pos, node, main_aspect, dst_aspect, dst_aspect_info)
	if not main_aspect.halt then
		-- any non-halt main aspect is fine, there's only one anyway
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:ra_shuntd_"..rot, param2 = node.param2})
	else
		advtrains.ndb.swap_node(pos, {name="advtrains_signals_ks:ra_danger_"..rot, param2 = node.param2})
	end
 end
end

-- Main aspects shunt signal
-- Shunt signals have only two states, distant doesn't matter
local mainaspects_ra = {
	{
		name = "shunt",
		description = S("Shunt"),
		shunt = true,
	},
}

for _, rtab in ipairs({
		{rot =  "0", sbox = {-1/8, -1/2, -1/2,  1/8, 1/2, -1/4}, ici=true, nextrot = "30"},
		{rot = "30", sbox = {-3/8, -1/2, -1/2, -1/8, 1/2, -1/4}, nextrot = "45"},
		{rot = "45", sbox = {-1/2, -1/2, -1/2, -1/4, 1/2, -1/4}, nextrot = "60"},
		{rot = "60", sbox = {-1/2, -1/2, -3/8, -1/4, 1/2, -1/8}, nextrot = "0"},
	}) do
	local rot = rtab.rot
	
	-- Hauptsignal
	for typ, prts in pairs({
			danger   = {asp = advtrains.interlocking.signal.ASPI_HALT, n = "slow", ici=true},
			slow     = {
				asp = function(pos)
					return { main = getzs3(pos) or -1, proceed_as_main = true, dst = 0 }
				end,
				n = "nextslow"
			},
			nextslow = {
				asp = function(pos)
					return { main = getzs3(pos) or -1, proceed_as_main = true, dst = getzs3v(pos) or 6 }
				end,
				n = "free"
			},
			free     = {
				asp = function(pos)
					return { main = getzs3(pos) or -1, proceed_as_main = true, dst = -1 }
				end,
	                        n = "shunt"
			},
			shunt    = {asp = { main =  0, shunt = true} , n = "danger"},
		}) do
		local tile = "advtrains_signals_ks_ltm_"..typ..".png"
		local afunc = prts.asp
		if type(afunc) == "table" then
			afunc = function() return prts.asp end
		end
		if typ == "nextslow" then
			tile = {
				name = tile,
				animation = {
					type = "vertical_frames",
					aspect_w = 32,
					aspect_h = 32,
					length = 1,
				}
			}
		end
		minetest.register_node("advtrains_signals_ks:hs_"..typ.."_"..rot, {
			description = S("Ks Main Signal"),
			drawtype = "mesh",
			mesh = "advtrains_signals_ks_main_smr"..rot..".obj",
			tiles = {"advtrains_signals_ks_mast.png", "advtrains_signals_ks_head.png", "advtrains_signals_ks_head.png", tile},
			
			paramtype="light",
			sunlight_propagates=true,
			light_source = 4,
			
			paramtype2 = "facedir",
			selection_box = {
				type = "fixed",
				fixed = {rtab.sbox, {-1/4, -1/2, -1/4, 1/4, -7/16, 1/4}}
			},
			groups = {
				cracky = 2,
				advtrains_signal = 2,
				not_blocking_trains = 1,
				save_in_at_nodedb = 1,
				not_in_creative_inventory = (rtab.ici and prts.ici) and 0 or 1,
			},
			drop = "advtrains_signals_ks:hs_danger_0",
			inventory_image = "advtrains_signals_ks_hs_inv.png",
			advtrains = {
				main_aspects = mainaspects_main,
				apply_aspect = applyaspectf_main(rot),
				get_aspect_info = afunc,
				route_role = "main_distant",
				trackworker_next_rot = "advtrains_signals_ks:hs_"..typ.."_"..rtab.nextrot,
				trackworker_rot_incr_param2 = (rot=="60")
			},
			on_rightclick = advtrains.interlocking.signal.on_rightclick,
			can_dig = advtrains.interlocking.signal.can_dig,
			after_dig_node = advtrains.interlocking.signal.after_dig,
		})
		-- rotatable by trackworker
	end
	
	-- Vorsignal (NEU!)
	for typ, prts in pairs({
			-- note: the names are taken from the main signal equivalent so that the same names for the lamp images can be used
			slow   = {asp = function(pos) return { dst = 0, shunt = true } end, n = "nextslow", ici=true},
			nextslow = {
				asp = function(pos)
					return { dst = getzs3v(pos) or 6, shunt = true }
				end,
				n = "free"
			},
			free     = {
				asp = function(pos)
					return { dst = -1, shunt = true }
				end,
	            n = "slow"
			},
		}) do
		local tile = "advtrains_signals_ks_ltm_"..typ..".png"
		local afunc = prts.asp
		if type(afunc) == "table" then
			afunc = function() return prts.asp end
		end
		if typ == "nextslow" then
			tile = {
				name = tile,
				animation = {
					type = "vertical_frames",
					aspect_w = 32,
					aspect_h = 32,
					length = 1,
				}
			}
		end
		minetest.register_node("advtrains_signals_ks:vs_"..typ.."_"..rot, {
			description = S("Ks Distant Signal"),
			drawtype = "mesh",
			mesh = "advtrains_signals_ks_distant_smr"..rot..".obj",
			tiles = {"advtrains_signals_ks_mast.png", "advtrains_signals_ks_head.png", "advtrains_signals_ks_head.png", tile},
			
			paramtype="light",
			sunlight_propagates=true,
			light_source = 4,
			
			paramtype2 = "facedir",
			selection_box = {
				type = "fixed",
				fixed = {rtab.sbox, {-1/4, -1/2, -1/4, 1/4, -7/16, 1/4}}
			},
			groups = {
				cracky = 2,
				advtrains_signal = 2,
				not_blocking_trains = 1,
				save_in_at_nodedb = 1,
				not_in_creative_inventory = (rtab.ici and prts.ici) and 0 or 1,
			},
			drop = "advtrains_signals_ks:vs_slow_0",
			inventory_image = "advtrains_signals_ks_vs_inv.png",
			advtrains = {
				main_aspects = mainaspects_dst,
				apply_aspect = applyaspectf_distant(rot),
				get_aspect_info = afunc,
				route_role = "distant",
				pure_distant = true,
				trackworker_next_rot = "advtrains_signals_ks:vs_"..typ.."_"..rtab.nextrot,
				trackworker_rot_incr_param2 = (rot=="60")
			},
			on_rightclick = advtrains.interlocking.signal.on_rightclick,
			can_dig = advtrains.interlocking.signal.can_dig,
			after_dig_node = advtrains.interlocking.signal.after_dig,
		})
		-- rotatable by trackworker
	end
	
	
	--Rangiersignale:
	for typ, prts in pairs({
			danger = {asp = { main = false, shunt = false }, n = "shuntd", ici=true},
			shuntd = {asp = { main = false, shunt = true } , n = "danger"},
		}) do
		local sbox = table.copy(rtab.sbox)
		sbox[5] = 0
		local afunc = prts.asp
		if type(afunc) == "table" then
			afunc = function() return prts.asp end
		end
		minetest.register_node("advtrains_signals_ks:ra_"..typ.."_"..rot, {
			description = S("Ks Shunting Signal"),
			drawtype = "mesh",
			mesh = "advtrains_signals_ks_sht_smr"..rot..".obj",
			tiles = {"advtrains_signals_ks_mast.png", "advtrains_signals_ks_head.png", "advtrains_signals_ks_head.png", "advtrains_signals_ks_ltm_"..typ..".png"},
			
			paramtype="light",
			sunlight_propagates=true,
			light_source = 4,
			
			paramtype2 = "facedir",
			selection_box = {
				type = "fixed",
				fixed = {sbox, {-1/4, -1/2, -1/4, 1/4, -7/16, 1/4}}
			},
			collision_box = {
				type = "fixed",
				fixed = sbox,
			},
			groups = {
				cracky = 2,
				advtrains_signal = 2,
				not_blocking_trains = 1,
				save_in_at_nodedb = 1,
				not_in_creative_inventory = (rtab.ici and prts.ici) and 0 or 1,
			},
			drop = "advtrains_signals_ks:ra_danger_0",
			inventory_image = "advtrains_signals_ks_ra_inv.png",
			advtrains = {
				main_aspects = mainaspects_ra,
				apply_aspect = applyaspectf_ra(rot),
				get_aspect_info = afunc,
				route_role = "shunt",
				trackworker_next_rot = "advtrains_signals_ks:ra_"..typ.."_"..rtab.nextrot,
				trackworker_rot_incr_param2 = (rot=="60")
			},
			on_rightclick = advtrains.interlocking.signal.on_rightclick,
			can_dig = advtrains.interlocking.signal.can_dig,
			after_dig_node = advtrains.interlocking.signal.after_dig,
		})
		-- rotatable by trackworker
	end

	-- Schilder:
	local function register_sign(prefix, typ, nxt, description, mesh, tile2, dtyp, inv, asp)
		minetest.register_node("advtrains_signals_ks:"..prefix.."_"..typ.."_"..rot, {
			description = description,
			drawtype = "mesh",
			mesh = "advtrains_signals_ks_"..mesh.."_smr"..rot..".obj",
			tiles = {"advtrains_signals_ks_signpost.png", tile2},
			
			paramtype="light",
			sunlight_propagates=true,
			light_source = 4,
			
			paramtype2 = "facedir",
			selection_box = {
				type = "fixed",
				fixed = {rtab.sbox, {-1/4, -1/2, -1/4, 1/4, -7/16, 1/4}}
			},
			groups = {
				cracky = 2,
				advtrains_signal = 2,
				not_blocking_trains = 1,
				save_in_at_nodedb = 1,
				not_in_creative_inventory = (rtab.ici and typ == dtyp) and 0 or 1,
			},
			drop = "advtrains_signals_ks:"..prefix.."_"..dtyp.."_0",
			inventory_image = inv,
			advtrains = {
				get_aspect_info = asp,
				trackworker_next_rot = "advtrains_signals_ks:"..prefix.."_"..typ.."_"..rtab.nextrot,
				trackworker_rot_incr_param2 = (rot=="60"),
				trackworker_next_var = "advtrains_signals_ks:"..prefix.."_"..nxt.."_"..rot,
			},
			on_rightclick = advtrains.interlocking.signal.on_rightclick,
			can_dig = advtrains.interlocking.signal.can_dig,
			after_dig_node = advtrains.interlocking.signal.after_dig,
		})
		-- rotatable by trackworker
		--TODO add rotation using trackworker
	end

	for typ, prts in pairs {
		["hfs"] = {asp = {main = false, shunt = false}, n = "pam", mesh = "_hfs", owntile = true},
		["pam"] = {asp = {main = -1, shunt = false, proceed_as_main = true}, n = "ne4"},
		["ne4"] = {asp = {}, n = "ne3x1", mesh="_ne4", owntile = true},
		["ne3x1"] = {asp = {}, n = "ne3x2", mesh="_ne3", owntile = true},
		["ne3x2"] = {asp = {}, n = "ne3x3", mesh="_ne3", owntile = true},
		["ne3x3"] = {asp = {}, n = "ne3x4", mesh="_ne3", owntile = true},
		["ne3x4"] = {asp = {}, n = "ne3x5", mesh="_ne3", owntile = true},
		["ne3x5"] = {asp = {}, n = "hfs", mesh="_ne3", owntile = true},
	} do
		local mesh = prts.mesh or ""
		local tile2 = "advtrains_signals_ks_sign_lf7.png^(advtrains_signals_ks_sign_"..typ..".png^[makealpha:255,255,255)"
		if prts.owntile then
			tile2 = "advtrains_signals_ks_sign_"..typ..".png"
		end