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|
--trackplacer.lua
--holds code for the track-placing system. the default 'track' item will be a craftitem that places rails as needed. this will neither place or change switches nor place vertical rails.
local print=function(t, ...) minetest.log("action", table.concat({t, ...}, " ")) minetest.chat_send_all(table.concat({t, ...}, " ")) end
--all new trackplacer code
local tp={
tracks={}
}
function tp.register_tracktype(nnprefix, n_suffix)
tp.tracks[nnprefix]={
default=n_suffix,
single_conn={},
double_conn={},
--keys:conn1_conn2 (example:1_4)
--values:{name=x, param2=x}
twcycle={},
twrotate={},--indexed by suffix, list, tells order of rotations
modify={}
}
end
function tp.add_double_conn(nnprefix, suffix, rotation, conns)
local nodename=nnprefix.."_"..suffix..rotation
for i=0,3 do
tp.tracks[nnprefix].double_conn[((conns.conn1+4*i)%16).."_"..((conns.conn2+4*i)%16)]={name=nodename, param2=i}
tp.tracks[nnprefix].double_conn[((conns.conn2+4*i)%16).."_"..((conns.conn1+4*i)%16)]={name=nodename, param2=i}
end
tp.tracks[nnprefix].modify[nodename]=true
end
function tp.add_single_conn(nnprefix, suffix, rotation, conns)
local nodename=nnprefix.."_"..suffix..rotation
for i=0,3 do
tp.tracks[nnprefix].single_conn[((conns.conn1+4*i)%16)]={name=nodename, param2=i}
tp.tracks[nnprefix].single_conn[((conns.conn2+4*i)%16)]={name=nodename, param2=i}
end
tp.tracks[nnprefix].modify[nodename]=true
end
function tp.add_worked(nnprefix, suffix, rotation, cycle_follows)
tp.tracks[nnprefix].twcycle[suffix]=cycle_follows
if not tp.tracks[nnprefix].twrotate[suffix] then tp.tracks[nnprefix].twrotate[suffix]={} end
table.insert(tp.tracks[nnprefix].twrotate[suffix], rotation)
end
function tp.find_adjacent_tracks(pos)--TODO vertical calculations(check node below)
local conn1=0
while conn1<16 and not advtrains.is_track_and_drives_on(minetest.get_node(advtrains.dirCoordSet(pos, conn1)).name, advtrains.all_tracktypes) do
conn1=conn1+1
end
if conn1>=16 then
return nil, nil
end
local conn2=0
while conn2<16 and not advtrains.is_track_and_drives_on(minetest.get_node(advtrains.dirCoordSet(pos, conn2)).name, advtrains.all_tracktypes) or conn2==conn1 do
conn2=conn2+1
end
if conn2>=16 then
return conn1, nil
end
return conn1, conn2
end
function tp.find_already_connected(pos)--TODO vertical calculations(check node below)
local function istrackandbc(pos, conn)
local cnode=minetest.get_node(advtrains.dirCoordSet(pos, conn))
local bconn=(conn+8)%16
if advtrains.is_track_and_drives_on(cnode.name, advtrains.all_tracktypes) then
local cconn1, cconn2=advtrains.get_track_connections(cnode.name, cnode.param2)
return cconn1==bconn or cconn2==bconn
end
return false
end
local conn1=0
while conn1<16 and not istrackandbc(pos, conn1) do
conn1=conn1+1
end
if conn1>=16 then
return nil, nil
end
local conn2=0
while conn2<16 and not istrackandbc(pos, conn2) or conn2==conn1 do
conn2=conn2+1
end
if conn2>=16 then
return conn1, nil
end
return conn1, conn2
end
function tp.placetrack(pos, nnpref)
local conn1, conn2=tp.find_adjacent_tracks(pos)
local tr=tp.tracks[nnpref]
if not conn1 and not conn2 then
minetest.set_node(pos, {name=nnpref.."_"..tr.default})
elseif conn1 and not conn2 then
if tr.single_conn[conn1] then
tp.try_adjust_rail(tr, advtrains.dirCoordSet(pos, conn1), (conn1+8)%16)
minetest.set_node(pos, tr.single_conn[conn1])
else
minetest.set_node(pos, {name=nnpref.."_"..tr.default})
end
elseif conn1 and conn2 then
if tr.double_conn[conn1.."_"..conn2] then
tp.try_adjust_rail(tr, advtrains.dirCoordSet(pos, conn1), (conn1+8)%16)
tp.try_adjust_rail(tr, advtrains.dirCoordSet(pos, conn2), (conn1+8)%16)
minetest.set_node(pos, tr.double_conn[conn1.."_"..conn2])
elseif tr.single_conn[conn1] then --try at least one side
tp.try_adjust_rail(tr, advtrains.dirCoordSet(pos, conn1), (conn1+8)%16)
minetest.set_node(pos, tr.single_conn[conn1])
else
minetest.set_node(pos, {name=nnpref.."_"..tr.default})
end
end
end
function tp.try_adjust_rail(tr, pos, newdir)
--is rail already connected?
local node=minetest.get_node(pos)
local conn1, conn2=advtrains.get_track_connections(node.name, node.param2)
if newdir==conn1 or newdir==conn2 then
return
end
--rail at other end?
local adj1, adj2=tp.find_already_connected(pos)
if adj1 and adj2 then
return false--dont destroy existing track
elseif adj1 and not adj2 then
if tr.double_conn[adj1.."_"..newdir] then
minetest.set_node(pos, tr.double_conn[adj1.."_"..newdir])
return true--if exists, connect new rail and old end
end
return false
else
if tr.single_conn[newdir] then--just rotate old rail to right orientation
minetest.set_node(pos, tr.single_conn[newdir])
return true
end
return false
end
end
function tp.register_track_placer(nnprefix, imgprefix, dispname)
minetest.register_craftitem(nnprefix.."_placer",{
description = dispname,
inventory_image = imgprefix.."_placer.png",
wield_image = imgprefix.."_placer.png",
groups={},
on_place = function(itemstack, placer, pointed_thing)
if pointed_thing.type=="node" then
local pos=pointed_thing.above
if minetest.registered_nodes[minetest.get_node(pos).name] and minetest.registered_nodes[minetest.get_node(pos).name].buildable_to then
tp.placetrack(pos, nnprefix)
if not minetest.setting_getbool("creative_mode") then
itemstack:take_item()
end
end
end
return itemstack
end,
})
end
minetest.register_craftitem("advtrains:trackworker",{
description = "Track Worker Tool\n\nLeft-click: change rail type (straight/curve/switch)\nRight-click: rotate rail",
groups = {cracky=1}, -- key=name, value=rating; rating=1..3.
inventory_image = "advtrains_trackworker.png",
wield_image = "advtrains_trackworker.png",
stack_max = 1,
on_place = function(itemstack, placer, pointed_thing)
if pointed_thing.type=="node" then
local pos=pointed_thing.under
local node=minetest.get_node(pos)
if not advtrains.is_track_and_drives_on(minetest.get_node(pos).name, advtrains.all_tracktypes) then return end
if advtrains.is_train_at_pos(pos) then return end
local nnprefix, suffix, rotation=string.match(node.name, "^([^_]+)_([^_]+)(_?.*)$")
--print(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twrotate[suffix] then
print("[advtrains]railtype not workable by trackworker")
return
end
local modext=tp.tracks[nnprefix].twrotate[suffix]
if rotation==modext[#modext] then --increase param2
minetest.set_node(pos, {name=nnprefix.."_"..suffix..modext[1], param2=(node.param2+1)%4})
return
else
local modpos
for k,v in pairs(modext) do if v==rotation then modpos=k end end
if not modpos then
print("[advtrains]rail not workable by trackworker")
return
end
minetest.set_node(pos, {name=nnprefix.."_"..suffix..modext[modpos+1], param2=node.param2})
end
advtrains.invalidate_all_paths()
end
end,
on_use=function(itemstack, user, pointed_thing)
if pointed_thing.type=="node" then
local pos=pointed_thing.under
local node=minetest.get_node(pos)
if not advtrains.is_track_and_drives_on(minetest.get_node(pos).name, advtrains.all_tracktypes) then return end
if advtrains.is_train_at_pos(pos) then return end
local nnprefix, suffix, rotation=string.match(node.name, "^([^_]+)_([^_]+)(_?.*)$")
if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twcycle[suffix] then
print("[advtrains]railtype not workable by trackworker")
return
end
local nextsuffix=tp.tracks[nnprefix].twcycle[suffix]
minetest.set_node(pos, {name=nnprefix.."_"..nextsuffix..rotation, param2=node.param2})
--invalidate trains
advtrains.invalidate_all_paths()
end
end,
})
--putting into right place
advtrains.trackplacer=tp
|
