From 4144fb84b0385286fa94b8d086f1ddc9753b8e0e Mon Sep 17 00:00:00 2001
From: Vanessa Ezekowitz <vanessaezekowitz@gmail.com>
Date: Tue, 3 Feb 2015 02:55:46 -0500
Subject: [PATCH] if someone screwdrivers a valve or sensor out of horizontal,
 reset it back to horizontal

---
 flowing_logic.lua | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/flowing_logic.lua b/flowing_logic.lua
index dce7bc4..009f7c0 100644
--- a/flowing_logic.lua
+++ b/flowing_logic.lua
@@ -208,9 +208,14 @@ minetest.register_abm({
 	chance = 1,
 	action = function(pos, node, active_object_count, active_object_count_wider)
 		local fdir = node.param2
+		local axisdir = math.floor(fdir/4)
 		local fdir_mod4    = fdir % 4
 		local fdir_mod4_p2 = (fdir+2) % 4
 
+		if axisdir ~= 0 and axisdir ~= 5 then -- if it isn't horizontal, force it.
+			minetest.swap_node(pos, {name = node.name, param2 = fdir_mod4})
+		end
+
 		local fdir_to_pos = {
 			{x = pos.x+1, y = pos.y, z = pos.z  },
 			{x = pos.x,   y = pos.y, z = pos.z-1},