Stairs: Add mossy cobble slab and stair

Allow water to turn cobble slab and stairs to turn into mossy versions.

There is no crafting recipe for mossy stairs and mossy slabs, the
stair/slab API has been modified to allow for a recipeitem that
is `nil`, which will omit adding a crafting recipe for these two
items. The API documentation is updated.

The slabs and stairs will turn mossy when water is adjacent, just like
cobblestone. You can either farm mossy versions by placing them in
water for a while, then collecting them, or run water over your craft.

diff --git a/game_api.txt b/game_api.txt
index 634b7f2993f41c608a4871ebed3dd5b92a709cad..93cf05273854477aea9e9da39b31e3e9a23bb665 100644 (file)
--- a/game_api.txt
+++ b/game_api.txt
@@ -343,7 +343,7 @@ delivered with Minetest Game, to keep them compatible with other mods.
 
  * Registers a stair.
  * `subname`: Basically the material name (e.g. cobble) used for the stair name. Nodename pattern: "stairs:stair_subname"
- * `recipeitem`: Item used in the craft recipe, e.g. "default:cobble"
+ * `recipeitem`: Item used in the craft recipe, e.g. "default:cobble", may be `nil`
  * `groups`: see [Known damage and digging time defining groups]
  * `images`: see [Tile definition]
  * `description`: used for the description field in the stair's definition

diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index 7e594b31abe73dc3a03699b6ccf12a3c4152239b..f3bb97cdd5664a8ca8595f7b8f39aaf56745140d 100644 (file)
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -466,12 +466,18 @@ minetest.register_abm({
 --
 
 minetest.register_abm({
-       nodenames = {"default:cobble"},
+       nodenames = {"default:cobble", "stairs:slab_cobble", "stairs:stair_cobble"},
        neighbors = {"group:water"},
        interval = 16,
        chance = 200,
        catch_up = false,
        action = function(pos, node)
-               minetest.set_node(pos, {name = "default:mossycobble"})
+               if node.name == "default:cobble" then
+                       minetest.set_node(pos, {name = "default:mossycobble"})
+               elseif node.name == "stairs:slab_cobble" then
+                       minetest.set_node(pos, {name = "stairs:slab_mossycobble", param2 = node.param2})
+               elseif node.name == "stairs:stair_cobble" then
+                       minetest.set_node(pos, {name = "stairs:stair_mossycobble", param2 = node.param2})
+               end
        end
 })

diff --git a/mods/stairs/init.lua b/mods/stairs/init.lua
index 7c28fa4f10ff072e65a43154397ca16fae254ae5..2195e4d42c880340f7df0b0921536769eabed9be 100644 (file)
--- a/mods/stairs/init.lua
+++ b/mods/stairs/init.lua
@@ -87,24 +87,26 @@ function stairs.register_stair(subname, recipeitem, groups, images, description,
                })
        end
 
-       minetest.register_craft({
-               output = 'stairs:stair_' .. subname .. ' 6',
-               recipe = {
-                       {recipeitem, "", ""},
-                       {recipeitem, recipeitem, ""},
-                       {recipeitem, recipeitem, recipeitem},
-               },
-       })
+       if recipeitem then
+               minetest.register_craft({
+                       output = 'stairs:stair_' .. subname .. ' 6',
+                       recipe = {
+                               {recipeitem, "", ""},
+                               {recipeitem, recipeitem, ""},
+                               {recipeitem, recipeitem, recipeitem},
+                       },
+               })
 
-       -- Flipped recipe for the silly minecrafters
-       minetest.register_craft({
-               output = 'stairs:stair_' .. subname .. ' 6',
-               recipe = {
-                       {"", "", recipeitem},
-                       {"", recipeitem, recipeitem},
-                       {recipeitem, recipeitem, recipeitem},
-               },
-       })
+               -- Flipped recipe for the silly minecrafters
+               minetest.register_craft({
+                       output = 'stairs:stair_' .. subname .. ' 6',
+                       recipe = {
+                               {"", "", recipeitem},
+                               {"", recipeitem, recipeitem},
+                               {recipeitem, recipeitem, recipeitem},
+                       },
+               })
+       end
 end
 
 
@@ -218,12 +220,14 @@ function stairs.register_slab(subname, recipeitem, groups, images, description,
                })
        end
 
-       minetest.register_craft({
-               output = 'stairs:slab_' .. subname .. ' 6',
-               recipe = {
-                       {recipeitem, recipeitem, recipeitem},
-               },
-       })
+       if recipeitem then
+               minetest.register_craft({
+                       output = 'stairs:slab_' .. subname .. ' 6',
+                       recipe = {
+                               {recipeitem, recipeitem, recipeitem},
+                       },
+               })
+       end
 end
 
 
@@ -310,6 +314,13 @@ stairs.register_stair_and_slab("cobble", "default:cobble",
                "Cobblestone Slab",
                default.node_sound_stone_defaults())
 
+stairs.register_stair_and_slab("mossycobble", nil,
+               {cracky = 3},
+               {"default_mossycobble.png"},
+               "Mossy Cobblestone Stair",
+               "Mossy Cobblestone Slab",
+               default.node_sound_stone_defaults())
+
 stairs.register_stair_and_slab("stonebrick", "default:stonebrick",
                {cracky = 3},
                {"default_stone_brick.png"},