From 85975a2d2651f06a1039d0e25c56af1031d5fc2b Mon Sep 17 00:00:00 2001
From: Wuzzy <Wuzzy2@mail.ru>
Date: Tue, 29 May 2018 13:46:39 +0200
Subject: [PATCH] mcl_stairs: Add woodlike cornerstair mode

---
 mods/ITEMS/mcl_stairs/cornerstair.lua | 39 ++++++++++++++++++++-------
 mods/ITEMS/mcl_stairs/register.lua    | 17 +-----------
 2 files changed, 30 insertions(+), 26 deletions(-)

diff --git a/mods/ITEMS/mcl_stairs/cornerstair.lua b/mods/ITEMS/mcl_stairs/cornerstair.lua
index 100657ca8..ab9377757 100644
--- a/mods/ITEMS/mcl_stairs/cornerstair.lua
+++ b/mods/ITEMS/mcl_stairs/cornerstair.lua
@@ -187,25 +187,44 @@ end
 --[[
 mcl_stairs.cornerstair.add(name, stairtiles)
 
-* "name" is the name of the node to make corner stairs for.
-* "stairtiles" is an optional table of tiles to override textures for inner and outer stairs.
-* "stairtiles" format is:
+NOTE: This function is used internally. If you register a stair, this function is already called, no
+need to call it again!
 
-    {tiles_def_for_outer_stair, tiles_def_for_inner_stair}
-
-Note: This function is called when you register a stair, no need to call it again!
+Usage:
+* name is the name of the node to make corner stairs for.
+* stairtiles is optional, can specify textures for inner and outer stairs. 3 data types are accepted:
+    * string: one of:
+        * "default": Use same textures as original node
+        * "woodlike": Take first frame of the original tiles, then take a triangle piece
+                      of the texture, rotate it by 90° and overlay it over the original texture
+    * table: Specify textures explicitly. Table of tiles to override textures for
+             inner and outer stairs. Table format:
+                 { tiles_def_for_outer_stair, tiles_def_for_inner_stair }
+    * nil: Equivalent to "default"
 ]]
 
 function mcl_stairs.cornerstair.add(name, stairtiles)
 	local node_def = minetest.registered_nodes[name]
 	local outer_tiles
 	local inner_tiles
-	if stairtiles then
-		outer_tiles = stairtiles[1]
-		inner_tiles = stairtiles[2]
-	else
+	if stairtiles == "woodlike" then
+		local t = node_def.tiles[1]
+		outer_tiles = {
+			t.."^("..t.."^[transformR90^mcl_stairs_turntexture.png^[makealpha:255,0,255)",
+			t.."^("..t.."^mcl_stairs_turntexture.png^[transformR270^[makealpha:255,0,255)",
+			t
+		}
+		inner_tiles = {
+			t.."^("..t.."^[transformR90^(mcl_stairs_turntexture.png^[transformR180)^[makealpha:255,0,255)",
+			t.."^("..t.."^[transformR270^(mcl_stairs_turntexture.png^[transformR90)^[makealpha:255,0,255)",
+			t
+		}
+	elseif stairtiles == nil or stairtiles == "default" then
 		outer_tiles = node_def.tiles
 		inner_tiles = node_def.tiles
+	else
+		outer_tiles = stairtiles[1]
+		inner_tiles = stairtiles[2]
 	end
 	local outer_groups = table.copy(node_def.groups)
 	outer_groups.not_in_creative_inventory = 1
diff --git a/mods/ITEMS/mcl_stairs/register.lua b/mods/ITEMS/mcl_stairs/register.lua
index 1830a455c..8311d14bf 100644
--- a/mods/ITEMS/mcl_stairs/register.lua
+++ b/mods/ITEMS/mcl_stairs/register.lua
@@ -3,21 +3,6 @@
 -- slabs actually take slightly longer to be dug than their stair counterparts.
 -- Note sure if it is a good idea to preserve this oddity.
 
-local function make_corner_texture(subname)
-	local t = minetest.registered_nodes["mcl_core:"..subname].tiles[1]
-	return {
-		{
-			t.."^("..t.."^[transformR90^mcl_stairs_turntexture.png^[makealpha:255,0,255)",
-			t.."^("..t.."^mcl_stairs_turntexture.png^[transformR270^[makealpha:255,0,255)",
-			t
-		},
-		{
-			t.."^("..t.."^[transformR90^(mcl_stairs_turntexture.png^[transformR180)^[makealpha:255,0,255)",
-			t.."^("..t.."^[transformR270^(mcl_stairs_turntexture.png^[transformR90)^[makealpha:255,0,255)",
-			t
-		}
-	}
-end
 local woods = {
 	{ "wood", "default_wood.png", "Oak Wood Stairs", "Oak Wood Slab", "Double Oak Wood Slab" },
 	{ "junglewood", "default_junglewood.png", "Jungle Wood Stairs", "Jungle Wood Slab", "Double Jungle Wood Slab" },
@@ -35,7 +20,7 @@ for w=1, #woods do
 			wood[3],
 			mcl_sounds.node_sound_wood_defaults(),
 			2,
-			make_corner_texture(wood[1]))
+			"woodlike")
 	mcl_stairs.register_slab(wood[1], "mcl_core:"..wood[1],
 			{handy=1,axey=1, flammable=3,wood_slab=1, material_wood=1},
 			{wood[2]},