diff options
Diffstat (limited to 'advtrains_interlocking/distant.lua')
| -rw-r--r-- | advtrains_interlocking/distant.lua | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/advtrains_interlocking/distant.lua b/advtrains_interlocking/distant.lua index 726c2b3..4175875 100644 --- a/advtrains_interlocking/distant.lua +++ b/advtrains_interlocking/distant.lua @@ -85,6 +85,23 @@ local function unassign_all(pos, force) unassign_dst(pos, force) end +--- Check whether a signal is "appropriate" for the distant signal system. +-- Currently, a signal is considered appropriate if its signal aspect can be set. +-- @function appropriate_signal +-- @param pos The position of the signal +local function appropriate_signal(pos) + local node = advtrains.ndb.get_node(pos) + local ndef = minetest.registered_nodes[node.name] or {} + if not ndef then + return false + end + local atdef = ndef.advtrains + if not atdef then + return false + end + return atdef.supported_aspects and atdef.set_aspect and true +end + --- Assign a distant signal to a main signal. -- @function assign -- @param main The position of the main signal. @@ -92,6 +109,9 @@ end -- @param[opt="manual"] by The method of assignment. -- @param[opt=false] skip_update Whether to skip callbacks. local function assign(main, dst, by, skip_update) + if not (appropriate_signal(main) and appropriate_signal(dst)) then + return + end local pts_main = pts(main) local pts_dst = pts(dst) local t = db_distant[pts_main] @@ -177,4 +197,5 @@ advtrains.distant = { update_main = update_main, update_dst = update_dst, update_signal = update_signal, + appropriate_signal = appropriate_signal, } |