Automatically add craft for walls

mods/ITEMS/mcl_walls/API.md

@@ -2,18 +2,25 @@
 
 This API allows you to add more walls (like the cobblestone wall) to MineClone 2.
 
-## `mcl_walls.register_wall(nodename, description, tiles, invtex, groups, sounds)`
+## `mcl_walls.register_wall(nodename, description, craft_material, tiles, invtex, groups, sounds)`
 
 Adds a new wall type. This is optimized for stone-based walls, but other materials are theoretically possible, too.
 
 The current implementation registers a couple of nodes for the different nodeboxes.
 All walls connect to solid nodes and all other wall nodes.
 
-The crafting recipe is NOT registered, you have to add your own.
+If `craft_material` is not `nil` it also adds a crafting recipe of the following form:
+
+    CCC
+    CCC
+    
+    Yields 6 walls
+    C = craft_material (can be group)
 
 ### Parameters
 * `nodename`: Full itemstring of the new wall node (base node only). ***Must not have an underscore!***
 * `description`: Item description of item (tooltip), visible to user
+* `craft_material`: Item to be used in the crafting recipe. If `nil`, no crafting recipe will be added
 * `tiles`: Wall textures table, same syntax as for `minetest.register_node`
 * `inventory_image`: Inventory image (optional, default is an ugly 3D image)
 * `groups`: Base group memberships (optional, default is `{cracky=3}`)

mods/ITEMS/mcl_walls/init.lua

@@ -84,12 +84,13 @@ local full_blocks = {
 --[[ Adds a new wall type.
 * nodename: Itemstring of base node to add. Must not contain an underscore
 * description: Item description (tooltip), visible to user
+* craft_material: Material for the default crafting recipe (optional)
 * tiles: Wall textures table
 * inventory_image: Inventory image (optional)
 * groups: Base group memberships (optional, default is {cracky=3})
 * sounds: Sound table (optional, default is stone)
 ]]
-function mcl_walls.register_wall(nodename, description, tiles, inventory_image, groups, sounds)
+function mcl_walls.register_wall(nodename, description, craft_material, tiles, inventory_image, groups, sounds)
 
 	local base_groups = groups
 	if not base_groups then
@@ -211,29 +212,23 @@ function mcl_walls.register_wall(nodename, description, tiles, inventory_image,
 		on_construct = update_wall,
 		sounds = sounds,
 	})
+	if craft_material then
+		minetest.register_craft({
+			output = nodename .. " 6",
+			recipe = {
+				{craft_material, craft_material, craft_material},
+				{craft_material, craft_material, craft_material},
+			}
+		})
+	end
 end
 
 -- Cobblestone wall
-
+mcl_walls.register_wall("mcl_walls:cobble", "Cobblestone Wall", "mcl_core:cobble", {"default_cobble.png"}, "mcl_walls_cobble.png")
-mcl_walls.register_wall("mcl_walls:cobble", "Cobblestone Wall", {"default_cobble.png"}, "mcl_walls_cobble.png")
-minetest.register_craft({
-	output = 'mcl_walls:cobble 6',
-	recipe = {
-		{'mcl_core:cobble', 'mcl_core:cobble', 'mcl_core:cobble'},
-		{'mcl_core:cobble', 'mcl_core:cobble', 'mcl_core:cobble'}
-	}
-})
 
 -- Mossy wall
 
-mcl_walls.register_wall("mcl_walls:mossycobble", "Mossy Cobblestone Wall", {"default_mossycobble.png"}, "mcl_walls_mossycobble.png")
+mcl_walls.register_wall("mcl_walls:mossycobble", "Mossy Cobblestone Wall", "mcl_core:mossycobble", {"default_mossycobble.png"}, "mcl_walls_mossycobble.png")
-minetest.register_craft({
-	output = 'mcl_walls:mossycobble 6',
-	recipe = {
-		{'mcl_core:mossycobble', 'mcl_core:mossycobble', 'mcl_core:mossycobble'},
-        {'mcl_core:mossycobble', 'mcl_core:mossycobble', 'mcl_core:mossycobble'}
-	}
-})
 
 minetest.register_on_placenode(update_wall_global)
 minetest.register_on_dignode(update_wall_global)