From f5802a3e40cccae431b7863f0a2e56bd6afe55e4 Mon Sep 17 00:00:00 2001
From: Yaman Qalieh <ybq987@gmail.com>
Date: Thu, 2 Dec 2021 00:12:53 -0500
Subject: [PATCH] Pull some parent node vars for stairs and slabs

Co-authored-by: tenplus1 <tenplus1@users.noreply.github.com>
---
 mods/stairs/init.lua | 35 +++++++++++++++++++++++++++--------
 1 file changed, 27 insertions(+), 8 deletions(-)

diff --git a/mods/stairs/init.lua b/mods/stairs/init.lua
index 89e0d24a..4ba854fa 100644
--- a/mods/stairs/init.lua
+++ b/mods/stairs/init.lua
@@ -57,13 +57,24 @@ local function warn_if_exists(nodename)
 	end
 end
 
+-- get node settings to use for stairs
+local function get_node_vars(nodename)
+
+	local def = minetest.registered_nodes[nodename]
+
+	if def then
+		return def.light_source, def.use_texture_alpha, def.sunlight_propagates
+	end
+
+	return nil, nil, nil
+end
 
 -- Register stair
 -- Node will be called stairs:stair_<subname>
 
 function stairs.register_stair(subname, recipeitem, groups, images, description,
 		sounds, worldaligntex)
-	local src_def = minetest.registered_nodes[recipeitem]
+	local light_source, texture_alpha, sunlight = get_node_vars(recipeitem)
 
 	-- Set backface culling and world-aligned textures
 	local stair_images = {}
@@ -93,7 +104,9 @@ function stairs.register_stair(subname, recipeitem, groups, images, description,
 		description = description,
 		drawtype = "nodebox",
 		tiles = stair_images,
-		use_texture_alpha = src_def and src_def.use_texture_alpha,
+		use_texture_alpha = texture_alpha,
+		sunlight_propagates = sunlight,
+		light_source = light_source,
 		paramtype = "light",
 		paramtype2 = "facedir",
 		is_ground_content = false,
@@ -165,7 +178,7 @@ end
 
 function stairs.register_slab(subname, recipeitem, groups, images, description,
 		sounds, worldaligntex)
-	local src_def = minetest.registered_nodes[recipeitem]
+	local light_source, texture_alpha, sunlight = get_node_vars(recipeitem)
 
 	-- Set world-aligned textures
 	local slab_images = {}
@@ -191,7 +204,9 @@ function stairs.register_slab(subname, recipeitem, groups, images, description,
 		description = description,
 		drawtype = "nodebox",
 		tiles = slab_images,
-		use_texture_alpha = src_def and src_def.use_texture_alpha,
+		use_texture_alpha = texture_alpha,
+		sunlight_propagates = sunlight,
+		light_source = light_source,
 		paramtype = "light",
 		paramtype2 = "facedir",
 		is_ground_content = false,
@@ -303,7 +318,7 @@ end
 
 function stairs.register_stair_inner(subname, recipeitem, groups, images,
 		description, sounds, worldaligntex, full_description)
-	local src_def = minetest.registered_nodes[recipeitem]
+	local light_source, texture_alpha, sunlight = get_node_vars(recipeitem)
 
 	-- Set backface culling and world-aligned textures
 	local stair_images = {}
@@ -338,7 +353,9 @@ function stairs.register_stair_inner(subname, recipeitem, groups, images,
 		description = description,
 		drawtype = "nodebox",
 		tiles = stair_images,
-		use_texture_alpha = src_def and src_def.use_texture_alpha,
+		use_texture_alpha = texture_alpha,
+		sunlight_propagates = sunlight,
+		light_source = light_source,
 		paramtype = "light",
 		paramtype2 = "facedir",
 		is_ground_content = false,
@@ -393,7 +410,7 @@ end
 
 function stairs.register_stair_outer(subname, recipeitem, groups, images,
 		description, sounds, worldaligntex, full_description)
-	local src_def = minetest.registered_nodes[recipeitem]
+	local light_source, texture_alpha, sunlight = get_node_vars(recipeitem)
 
 	-- Set backface culling and world-aligned textures
 	local stair_images = {}
@@ -428,7 +445,9 @@ function stairs.register_stair_outer(subname, recipeitem, groups, images,
 		description = description,
 		drawtype = "nodebox",
 		tiles = stair_images,
-		use_texture_alpha = src_def and src_def.use_texture_alpha,
+		use_texture_alpha = texture_alpha,
+		sunlight_propagates = sunlight,
+		light_source = light_source,
 		paramtype = "light",
 		paramtype2 = "facedir",
 		is_ground_content = false,