From c9e1df06b462e513057ac3e0e7489c74b56e2af8 Mon Sep 17 00:00:00 2001
From: autocommitter <autocommitter@linux-forks.de>
Date: Mon, 22 Apr 2024 15:02:54 +0200
Subject: State at 2023-11-07

---
 Crossroads/init_code.lua | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'Crossroads/init_code.lua')

diff --git a/Crossroads/init_code.lua b/Crossroads/init_code.lua
index 67c2544..067c474 100644
--- a/Crossroads/init_code.lua
+++ b/Crossroads/init_code.lua
@@ -22,6 +22,52 @@ function F.error(errorcode)
   error(F.errlist[errorcode])
 end
 
+-- Level crossing handling
+if not S.crossings then S.crossings = {} end
+
+local crossing_light_count = {
+  NRG_1 = 2,
+  NRG_2 = 4,
+  NRG_3 = 3,
+  NRG_4 = 2,
+  NRG_5 = 4,
+}
+
+local function update_light(loc, k, v)
+  local t = S.crossings[loc]
+  if not t then
+    t = {}
+    S.crossings[loc] = t
+  end
+  t[k] = v
+  local val = "on"
+  if next(t) == nil then
+    val = "off"
+  end
+  local pfx = loc .. "_"
+  local count = crossing_light_count[loc]
+  if not count then return end
+  for i = 1, count do
+    setstate(pfx .. i, val)
+  end
+end
+
+function F.x_on(t)
+  if event.type ~= "train" then return end
+  if not atc_arrow then return end
+  for loc, k in pairs(t) do
+    update_light(loc, k, true)
+  end
+end
+
+function F.x_off(t)
+  if event.type ~= "train" then return end
+  if not atc_arrow then return end
+  for loc, k in pairs(t) do
+    update_light(loc, k, nil)
+  end
+end
+
 --[[ F.stnbasic - Basis for all station functions:
 (By default, nil is defined as false or "no changes")
 stn        = Station Code
-- 
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