Add example code for sitting on stairs.

README.md

@@ -57,6 +57,12 @@ rotation and offset so that players can easily sit on chairs,
 lie on beds or emote-interact with machines (e.g. point emote
 when interacting with a node).
 
+## Can I sit on stair blocks with this?
+
+The patch file `sit-on-stairs.patch` in this project is an example
+patch for minetest_game that will allow a player to right-click stair
+nodes and sit on them as if they were seats.
+
 ## License
 
 LGPL-2.1

sit-on-stairs.patch

@@ -0,0 +1,20 @@
+diff --git a/mods/stairs/init.lua b/mods/stairs/init.lua
+index 191c78d..5759ce5 100644
+--- a/mods/stairs/init.lua
++++ b/mods/stairs/init.lua
+@@ -77,6 +77,15 @@ function stairs.register_stair(subname, recipeitem, groups, images, description,
+ 
+ 			return minetest.item_place(itemstack, placer, pointed_thing, param2)
+ 		end,
++		emote = {
++			emotestring = "sit",
++			eye_offset = {x = 0, y = 9, z = 0},
++			player_offset = {x = 3/16, y = 1/16, z = 0},
++			look_horizontal_offset = math.pi,
++		},
++		on_rightclick = function(pos, node, clicker)
++			emote.attach_to_node(clicker, pos, true)
++		end,
+ 	})
+ 
+ 	-- for replace ABM