From 4b6f03f25847a9b88f5be114ab896a3ecac858a8 Mon Sep 17 00:00:00 2001
From: Wuzzy <Wuzzy2@mail.ru>
Date: Tue, 21 Dec 2021 23:18:11 +0100
Subject: [PATCH] Detector check function

---
 mods/lzr_laser/physics.lua | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/mods/lzr_laser/physics.lua b/mods/lzr_laser/physics.lua
index 2ae1957..3d04c14 100644
--- a/mods/lzr_laser/physics.lua
+++ b/mods/lzr_laser/physics.lua
@@ -44,10 +44,9 @@ function lzr_laser.add_laser(pos, dir)
 			-- Activate node
 			minetest.set_node(pos, {name="lzr_laser:detector_on", param2 = node.param2})
 			pos = vector.add(pos, dir)
-			return pos, dir
-		else
-			return false
 		end
+		-- Laser ends here
+		return false
 	-- Anything else: fail
 	else
 		return false
@@ -123,6 +122,20 @@ function lzr_laser.emit_lasers_in_area(pos1, pos2)
 	end
 end
 
+-- Return true if all detectors in area are on (including if no detector)
+function lzr_laser.check_detectors_in_area(pos1, pos2)
+	local detectors = minetest.find_nodes_in_area(pos1, pos2, {"group:detector"})
+	for d=1, #detectors do
+		local dpos = detectors[d]
+		local detector = minetest.get_node(dpos)
+		local is_active = minetest.get_item_group(detector.name, "detector") == 2
+		if not is_active then
+			return false
+		end
+	end
+	return true
+end
+
 -- Completely recalculate all lasers
 function lzr_laser.full_laser_update(pos1, pos2)
 	lzr_laser.clear_lasers_in_area(pos1, pos2)