283 lines
9.7 KiB
Lua
283 lines
9.7 KiB
Lua
--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.
|
|
|
|
--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
|
|
|
|
|
|
--[[
|
|
rewrite algorithm.
|
|
selection criteria: these will never be changed or even selected:
|
|
- tracks being already connected on both sides
|
|
- tracks that are already connected on one side but are not bendable to the desired position
|
|
the following situations can occur:
|
|
1. there are two more than two rails around
|
|
1.1 there is one or more subset(s) that can be directly connected
|
|
-> choose the first possibility
|
|
2.2 not
|
|
-> choose the first one and orient straight
|
|
2. there's exactly 1 rail around
|
|
-> choose and orient straight
|
|
3. there's no rail around
|
|
-> set straight
|
|
]]
|
|
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 dnode=minetest.get_node(pos)
|
|
local dconn1, dconn2=advtrains.get_track_connections(dnode.name, dnode.param2)
|
|
local t={[true]="true", [false]="false"}
|
|
if istrackandbc(pos, dconn1) and istrackandbc(pos, dconn2) then return dconn1, dconn2
|
|
elseif istrackandbc(pos, dconn1) then return dconn1
|
|
elseif istrackandbc(pos, dconn2) then return dconn2
|
|
end
|
|
return nil
|
|
end
|
|
function tp.rail_and_can_be_bent(originpos, conn, nnpref)
|
|
local pos=advtrains.dirCoordSet(originpos, conn)
|
|
local newdir=(conn+8)%16
|
|
local node=minetest.get_node(pos)
|
|
local tr=tp.tracks[nnpref]
|
|
if not advtrains.is_track_and_drives_on(node.name, advtrains.all_tracktypes) then
|
|
return false
|
|
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
|
|
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
|
|
return true
|
|
end
|
|
return false
|
|
end
|
|
end
|
|
function tp.bend_rail(originpos, conn, nnpref)
|
|
local pos=advtrains.dirCoordSet(originpos, conn)
|
|
local newdir=(conn+8)%16
|
|
local node=minetest.get_node(pos)
|
|
local tr=tp.tracks[nnpref]
|
|
--is rail already connected? no need to bend.
|
|
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.placetrack(pos, nnpref)
|
|
--1. find all rails that are likely to be connected
|
|
local tr=tp.tracks[nnpref]
|
|
local p_rails={}
|
|
for i=0,15 do
|
|
if tp.rail_and_can_be_bent(pos, i, nnpref) then
|
|
p_rails[#p_rails+1]=i
|
|
end
|
|
end
|
|
if #p_rails==0 then
|
|
minetest.set_node(pos, {name=nnpref.."_"..tr.default})
|
|
elseif #p_rails==1 then
|
|
tp.bend_rail(pos, p_rails[1], nnpref)
|
|
minetest.set_node(pos, tr.single_conn[p_rails[1]])
|
|
else
|
|
--iterate subsets
|
|
for k1, conn1 in ipairs(p_rails) do
|
|
for k2, conn2 in ipairs(p_rails) do
|
|
if k1~=k2 then
|
|
if (tr.double_conn[conn1.."_"..conn2]) then
|
|
tp.bend_rail(pos, conn1, nnpref)
|
|
tp.bend_rail(pos, conn2, nnpref)
|
|
minetest.set_node(pos, tr.double_conn[conn1.."_"..conn2])
|
|
return
|
|
end
|
|
end
|
|
end
|
|
end
|
|
--not found
|
|
tp.bend_rail(pos, p_rails[1], nnpref)
|
|
minetest.set_node(pos, tr.single_conn[p_rails[1]])
|
|
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)
|
|
local name = placer:get_player_name()
|
|
if not name then
|
|
return itemstack
|
|
end
|
|
if pointed_thing.type=="node" then
|
|
local pos=pointed_thing.above
|
|
local upos=pointed_thing.under
|
|
if minetest.is_protected(pos,name) and minetest.is_protected(upos,name) then
|
|
return itemstack
|
|
end
|
|
if minetest.registered_nodes[minetest.get_node(pos).name] and minetest.registered_nodes[minetest.get_node(pos).name].buildable_to
|
|
and minetest.registered_nodes[minetest.get_node(upos).name] and minetest.registered_nodes[minetest.get_node(upos).name].walkable 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/bumper/signal/etc.",
|
|
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)
|
|
local name = placer:get_player_name()
|
|
if not name then
|
|
return
|
|
end
|
|
if pointed_thing.type=="node" then
|
|
local pos=pointed_thing.under
|
|
if minetest.is_protected(pos, name) then
|
|
return
|
|
end
|
|
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, "^(.+)_([^_]+)(_[^_]+)$")
|
|
--print(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
|
|
if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twrotate[suffix] then
|
|
nnprefix, suffix=string.match(node.name, "^(.+)_([^_]+)$")
|
|
rotation = ""
|
|
if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twrotate[suffix] then
|
|
minetest.chat_send_player(placer:get_player_name(), "This node can't be rotated using the trackworker!")
|
|
return
|
|
end
|
|
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
|
|
minetest.chat_send_player(placer:get_player_name(), "This node can't be rotated using the 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)
|
|
local name = user:get_player_name()
|
|
if not name then
|
|
return
|
|
end
|
|
if pointed_thing.type=="node" then
|
|
local pos=pointed_thing.under
|
|
local node=minetest.get_node(pos)
|
|
if minetest.is_protected(pos, name) then
|
|
return
|
|
end
|
|
|
|
--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, "^(.+)_([^_]+)(_[^_]+)$")
|
|
--print(node.name.."\npattern recognizes:"..nodeprefix.." / "..railtype.." / "..rotation)
|
|
if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twcycle[suffix] then
|
|
nnprefix, suffix=string.match(node.name, "^(.+)_([^_]+)$")
|
|
rotation = ""
|
|
if not tp.tracks[nnprefix] or not tp.tracks[nnprefix].twcycle[suffix] then
|
|
minetest.chat_send_player(user:get_player_name(), "This node can't be changed using the trackworker!")
|
|
return
|
|
end
|
|
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()
|
|
else
|
|
print(name, dump(tp.tracks))
|
|
end
|
|
end,
|
|
})
|
|
|
|
--putting into right place
|
|
advtrains.trackplacer=tp
|