diff options
Diffstat (limited to 'advtrains/trainlogic.lua')
| -rw-r--r-- | advtrains/trainlogic.lua | 46 |
1 files changed, 25 insertions, 21 deletions
diff --git a/advtrains/trainlogic.lua b/advtrains/trainlogic.lua index 91a67d5..ee1880d 100644 --- a/advtrains/trainlogic.lua +++ b/advtrains/trainlogic.lua @@ -892,38 +892,35 @@ function advtrains.spawn_wagons(train_id) end end end - -function advtrains.split_train_at_wagon(wagon_id) - --get train - local data = advtrains.wagons[wagon_id] - local old_id = data.train_id - local train=advtrains.trains[old_id] +function advtrains.split_train_at_index(train, index) + -- this function splits a train at index, creating a new train from the back part of the train. + + local train_id=train.id + if index > #train.trainparts then + -- index specified too long + return + end + local w_id = train.trainparts[index] + local data = advtrains.wagons[w_id] local _, wagon = advtrains.get_wagon_prototype(data) - - if not advtrains.train_ensure_init(old_id, train) then - atwarn("Train",old_id,"is not initialized! Operation aborted!") + if not advtrains.train_ensure_init(train_id, train) then + atwarn("Train",train_id,"is not initialized! Operation aborted!") return end - local index=advtrains.path_get_index_by_offset(train, train.index, - data.pos_in_train + wagon.wagon_span) - - -- find new initial path position for this train - local pos, connid, frac = advtrains.path_getrestore(train, index) - - -- build trainparts table, passing it directly to the train constructor + local p_index=advtrains.path_get_index_by_offset(train, train.index, - data.pos_in_train + wagon.wagon_span) + local pos, connid, frac = advtrains.path_getrestore(train, p_index) local tp = {} for k,v in ipairs(train.trainparts) do - if k >= data.pos_in_trainparts then + if k >= index then table.insert(tp, v) - train.trainparts[k]=nil + train.trainparts[k] = nil end end - - --update train parts - advtrains.update_trainpart_properties(old_id) + advtrains.update_trainpart_properties(train_id) recalc_end_index(train) - run_callbacks_update(old_id, train) + run_callbacks_update(train_id, train) --create subtrain local newtrain_id=advtrains.create_new_train_at(pos, connid, frac, tp) @@ -931,6 +928,13 @@ function advtrains.split_train_at_wagon(wagon_id) newtrain.velocity=train.velocity return newtrain_id -- return new train ID, so new train can be manipulated + +end + +function advtrains.split_train_at_wagon(wagon_id) + --get train + local data = advtrains.wagons[wagon_id] + advtrains.split_train_at_index(advtrains.trains[data.train_id], data.pos_in_trainparts) end -- coupling |