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-- passive.lua
-- Rework for advtrains 2.5: The passive API now uses the reworked node_state system. Please see the comment in tracks.lua
function advtrains.getstate(parpos, pnode)
local pos
if atlatc then
pos = atlatc.pcnaming.resolve_pos(parpos)
else
pos = advtrains.round_vector_floor_y(parpos)
end
if type(pos)~="table" or (not pos.x or not pos.y or not pos.z) then
debug.sethook()
error("Invalid position supplied to getstate")
end
local node=pnode or advtrains.ndb.get_node(pos)
local ndef=minetest.registered_nodes[node.name]
local st
if ndef and ndef.advtrains then
return ndef.advtrains.node_state
end
end
function advtrains.setstate(parpos, newstate, pnode)
local pos
if atlatc then
pos = atlatc.pcnaming.resolve_pos(parpos)
else
pos = advtrains.round_vector_floor_y(parpos)
end
if type(pos)~="table" or (not pos.x or not pos.y or not pos.z) then
debug.sethook()
error("Invalid position supplied to setstate")
end
local node=pnode or advtrains.ndb.get_node(pos)
local ndef=minetest.registered_nodes[node.name]
if not ndef or not ndef.advtrains then
return false, "missing_node_def"
end
local old_state = ndef.advtrains.node_state
if old_state == newstate then
-- nothing needs to be done
return true
end
if not ndef.advtrains.node_state_map then
return false, "missing_node_state_map"
end
local new_node_name = ndef.advtrains.node_state_map[newstate]
if not new_node_name then
return false, "no_such_state"
end
-- prevent state switching when route lock or train is present
if advtrains.get_train_at_pos(pos) then
return false, "train_here"
end
if advtrains.interlocking and advtrains.interlocking.route.has_route_lock(minetest.encode_pos(pos)) then
return false, "route_lock_here"
end
-- perform the switch
local new_node = {name = new_node_name, param2 = node.param2}
advtrains.ndb.swap_node(pos, new_node)
-- if callback is present, call it
if ndef.advtrains.node_on_switch_state then
ndef.advtrains.node_on_switch_state(pos, new_node, old_state, newstate)
end
-- invalidate paths (only relevant if this is a track)
advtrains.invalidate_all_paths(pos)
return true
end
function advtrains.is_passive(parpos, pnode)
local pos
if atlatc then
pos = atlatc.pcnaming.resolve_pos(parpos)
else
pos = advtrains.round_vector_floor_y(parpos)
end
if type(pos)~="table" or (not pos.x or not pos.y or not pos.z) then
debug.sethook()
error("Invalid position supplied to getstate")
end
local node=pnode or advtrains.ndb.get_node(pos)
local ndef=minetest.registered_nodes[node.name]
if ndef and ndef.advtrains and ndef.advtrains.node_state_map then
return true
else
return false
end
end
-- switches a node back to fallback state, if defined. Doesn't support pcnaming.
function advtrains.set_fallback_state(pos, pnode)
local node=pnode or advtrains.ndb.get_node(pos)
local ndef=minetest.registered_nodes[node.name]
if not ndef or not ndef.advtrains or not ndef.advtrains.node_fallback_state then
return false, "no_fallback_state"
end
return advtrains.setstate(pos, ndef.advtrains.node_fallback_state, node)
end
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