From 479ed1c12a0da881e261fe786d33f560c07fbcd5 Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Sun, 7 Jan 2018 16:00:21 +0100
Subject: [PATCH] Fix generated vines sometimes horizontal in air

---
 mods/MAPGEN/mcl_mapgen_core/init.lua | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mods/MAPGEN/mcl_mapgen_core/init.lua b/mods/MAPGEN/mcl_mapgen_core/init.lua
index c76cfc6c8..2ec918302 100644
--- a/mods/MAPGEN/mcl_mapgen_core/init.lua
+++ b/mods/MAPGEN/mcl_mapgen_core/init.lua
@@ -1519,7 +1519,11 @@ local function generate_tree_decorations(minp, maxp, seed, data, param2_data, ar
 
 			if perlin_vines:get2d(pos) > -1.0 and perlin_vines_fine:get3d(pos) > vine_threshold and data[p_pos] == c_air then
 
-				local param2 = minetest.dir_to_wallmounted(vector.subtract(treepos, pos))
+				local rdir = {}
+				rdir.x = -dirs[d].x
+				rdir.y = dirs[d].y
+				rdir.z = -dirs[d].z
+				local param2 = minetest.dir_to_wallmounted(rdir)
 
 				-- Determine growth direction
 				local grow_upwards = false