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-rw-r--r--advtrains/advtrains_luaautomation/interrupt.lua48
1 files changed, 48 insertions, 0 deletions
diff --git a/advtrains/advtrains_luaautomation/interrupt.lua b/advtrains/advtrains_luaautomation/interrupt.lua
new file mode 100644
index 0000000..e9ad443
--- /dev/null
+++ b/advtrains/advtrains_luaautomation/interrupt.lua
@@ -0,0 +1,48 @@
+-- interrupt.lua
+-- implements interrupt queue
+
+--to be saved: pos and evtdata
+local iq={}
+local queue={}
+local timer=0
+local run=false
+
+function iq.load(data)
+ local d=data or {}
+ queue = d.queue or {}
+ timer = d.timer or 0
+end
+function iq.save()
+ return {queue = queue}
+end
+
+function iq.add(t, pos, evtdata)
+ queue[#queue+1]={t=t+timer, p=pos, e=evtdata}
+ run=true
+end
+
+minetest.register_globalstep(function(dtime)
+ if run then
+ timer=timer + math.min(dtime, 0.2)
+ for i=1,#queue do
+ local qe=queue[i]
+ if not qe then
+ table.remove(queue, i)
+ i=i-1
+ elseif timer>qe.t then
+ local pos, evtdata=queue[i].p, queue[i].e
+ local node=advtrains.ndb.get_node(pos)
+ local ndef=minetest.registered_nodes[node.name]
+ if ndef and ndef.luaautomation and ndef.luaautomation.fire_event then
+ ndef.luaautomation.fire_event(pos, evtdata)
+ end
+ table.remove(queue, i)
+ i=i-1
+ end
+ end
+ end
+end)
+
+
+
+atlatc.interrupt=iq