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--clipboard = {trainlen = number, [n] = {type = string, flipped = bool, }
-- Yaw is in radians. There are 2pi rad in a circle. North is the 0 point and the angle increases anticlockwise.
-- 4.712389 = 1.5pi; sin(1.5pi) = -1
-- 7.853981 = 2.5pi; sin(2.5pi) = 1
minetest.register_tool("advtrains:copytool", {
description = attrans("Train copy/paste tool\n\nLeft-click: copy train\nRight-click: paste train"),
inventory_image = "advtrains_copytool.png",
wield_image = "advtrains_copytool.png",
stack_max = 1,
-- Paste: Take the clipboard and the player yaw, and attempt to place a new train in the world.
-- The front of the train is used as the start of the new train and it proceeds backwards from
-- the direction of travel.
on_place = function(itemstack, placer, pointed_thing)
if ((not pointed_thing.type == "node") or (not placer.get_player_name)) then
return
end
local pname = placer:get_player_name()
local node=minetest.get_node_or_nil(pointed_thing.under)
if not node then atprint("[advtrains]Ignore at placer position") return itemstack end
local nodename=node.name
if(not advtrains.is_track(nodename)) then
atprint("no track here, not placing.")
return itemstack
end
if not minetest.check_player_privs(placer, {train_operator = true }) then
minetest.chat_send_player(pname, "You don't have the train_operator privilege.")
return itemstack
end
if not minetest.check_player_privs(placer, {train_admin = true }) and minetest.is_protected(pointed_thing.under, placer:get_player_name()) then
return itemstack
end
local tconns=advtrains.get_track_connections(node.name, node.param2)
local yaw = placer:get_look_horizontal()
local plconnid = advtrains.yawToClosestConn(yaw, tconns)
local prevpos = advtrains.get_adjacent_rail(pointed_thing.under, tconns, plconnid, {default=true})
if not prevpos then
minetest.chat_send_player(pname, "The track you are trying to place the wagon on is not long enough!")
return
end
local meta = itemstack:get_meta()
if not meta then
minetest.chat_send_player(pname, attrans("The clipboard couldn't access the metadata. Paste failed."))
return
end
local clipboard = meta:get_string("clipboard")
if (clipboard == "") then
minetest.chat_send_player(pname, "The clipboard is empty.");
return
end
clipboard = minetest.deserialize(clipboard)
if (clipboard.wagons == nil) then
minetest.chat_send_player(pname, "The clipboard is empty.");
return
end
local wagons = {}
local n = 1
for _, wagonProto in pairs(clipboard.wagons) do
local wagon = advtrains.create_wagon(wagonProto.type, pname)
advtrains.wagons[wagon].wagon_flipped = wagonProto.wagon_flipped
wagons[n] = wagon
n = n + 1
end
local id=advtrains.create_new_train_at(pointed_thing.under, plconnid, 0, wagons)
local train = advtrains.trains[id]
train.off_track = train.end_index<train.path_trk_b
if (train.off_track) then
minetest.chat_send_player(pname, "Back of train would end up off track, cancelling.")
advtrains.remove_train(id)
return
end
train.text_outside = clipboard.text_outside
train.text_inside = clipboard.text_inside
train.routingcode = clipboard.routingcode
train.line = clipboard.line
return
end,
-- Copy: Take the pointed-at train and put it on the clipboard
on_use = function(itemstack, user, pointed_thing)
if not user:get_player_name() then return end
if (pointed_thing.type ~= "object") then return end
local le = pointed_thing.ref:get_luaentity()
if (le == nil) then
minetest.chat_send_player(user:get_player_name(), "No such lua entity!")
return
end
local wagon = advtrains.wagons[le.id]
if (not (le.id and advtrains.wagons[le.id])) then
minetest.chat_send_player(user:get_player_name(), string.format("No such wagon: %s", le.id))
return
end
local train = advtrains.trains[wagon.train_id]
if (not train) then
minetest.chat_send_player(user:get_player_name(), string.format("No such train: %s", wagon.train_id))
return
end
-- Record the train length. The paste operation should require this much free space.
local clipboard = {
trainlen = math.ceil(train.trainlen),
text_outside = train.text_outside,
text_inside = train.text_inside,
routingcode = train.routingcode,
line = train.line,
wagons = {}
}
local trainLength = math.ceil(train.trainlen)
local n = 1
for _, wagonid in pairs(train.trainparts) do
local wagon = advtrains.wagons[wagonid]
clipboard.wagons[n] = {
wagon_flipped = wagon.wagon_flipped,
type = wagon.type
}
n = n + 1
end
local function flip_clipboard(wagon_clipboard)
local flipped = {}
local numWagons = #wagon_clipboard
for k, v in ipairs(wagon_clipboard) do
local otherSide = (numWagons-k)+1
flipped[otherSide] = v
local wagon = flipped[otherSide]
wagon.wagon_flipped = not wagon.wagon_flipped
end
return flipped
end
local function is_loco(wagon_id)
local wagon = advtrains.wagons[wagon_id]
if (not wagon) then return false end
local wagon_proto = advtrains.wagon_prototypes[wagon.type or wagon.entity_name]
if wagon_proto and wagon_proto.is_locomotive then
return true
end
return false
end
-- Decide on a new 'front of train' and possibly flip the train.
-- Locomotive on one end = loco-hauled, that end is front;
-- if (advtrains.wagons[train.trainparts[1]].is_locomotive) then -- do nothing, train is already in right order
local numWagons = #train.trainparts
local backLoco = train.trainparts[numWagons]
backLoco = is_loco(backLoco)
local frontLoco = train.trainparts[1]
frontLoco = is_loco(frontLoco)
if ((backLoco) and (not frontLoco)) then
clipboard.wagons = flip_clipboard(clipboard.wagons)
--minetest.chat_send_player(user:get_player_name(), "Flipped train: Loco-hauled")
end
-- locomotives on both ends = train is push-pull / multi-unit, has no front, do nothing
-- no locomotives on ends = rake of wagons, front is end closest to where player copied.
if ((not frontLoco) and (not backLoco)) then
if (wagon.pos_in_trainparts / numWagons > 0.5) then -- towards the end of the rain
clipboard.wagons = flip_clipboard(clipboard.wagons)
--minetest.chat_send_player(user:get_player_name(), "Flipped train: Rake")
end
end
local meta = itemstack:get_meta()
if not meta then
minetest.chat_send_player(pname, attrans("The clipboard couldn't access the metadata. Copy failed."))
return
end
meta:set_string("clipboard", minetest.serialize(clipboard))
minetest.chat_send_player(user:get_player_name(), attrans("Train copied!"))
return itemstack
end
})
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