Created mcl_oxidization API, and converted mcl_copper to use it. Documented API.

mods/CORE/mcl_oxidization/API.md

@@ -0,0 +1,46 @@
+# Mineclone Oxidization API
+This document explains the API of this mod.
+
+### `register_oxidation_abm(abm_name, node_name)`
+Registers the ABM for the oxidization of nodes. It expects that the variable
+`_mcl_oxidized_variant` be set with the node name of the oxidized version. 
+
+#### Parameters:
+`abm_name`: A unique name for the abm to register.
+
+`node_name`: the name of the node to check, and to oxidize. 
+
+#### Usage:
+To use this API, add `_mcl_oxidized_variant = my_oxidized_node_name,` to the node 
+definition of the desired node, and then call 
+`register_oxidation_abm(my_oxidizable_node_abm, my_oxidizable_node)` in your code.
+This abm will swap out the nodes with the more oxidized version of the node, one 
+stage at a time.
+
+#### Example of Usage:
+From mcl_copper:
+```lua 
+local block_oxidation = {
+    { "", "_exposed" },
+    { "_cut", "_exposed_cut" },
+    { "_exposed", "_weathered" },
+    { "_exposed_cut", "_weathered_cut" },
+    { "_weathered", "_oxidized" },
+    { "_weathered_cut", "_oxidized_cut" }
+}
+
+for _, b in pairs(block_oxidation) do
+    register_oxidation_abm("Copper oxidation", "mcl_copper:block" .. b[1], "mcl_copper:block" .. b[2])
+end
+```
+
+### Oxidization Removal
+Make sure that the Oxidized Node has this in its definition:
+
+`_mcl_stripped_variant = my_less_oxidized_node,`
+
+And axes in mineclone will scrape the oxidization level down, usually by one stage.
+An example of usage: `_mcl_stripped_variant = "mcl_copper:block",`
+
+Implementation of other tools for scraping does not yet exist, but may in the future.
+

mods/CORE/mcl_oxidization/init.lua

@@ -0,0 +1,20 @@
+---
+--- Generated by EmmyLua(https://github.com/EmmyLua)
+--- Created by michieal.
+--- DateTime: 2/15/23 1:11 AM
+---
+
+function register_oxidation_abm(abm_name, node_name, oxidized_variant)
+	minetest.register_abm({
+		label = abm_name,
+		nodenames = { node_name },
+		interval = 500,
+		chance = 3,
+		action = function(pos, node)
+			local def = minetest.registered_nodes[node_name]
+			if def and def._mcl_oxidized_variant then
+				minetest.swap_node(pos, { name = oxidized_variant, param2 = node.param2 })
+			end
+		end,
+	})
+end

mods/CORE/mcl_oxidization/mod.conf

@@ -0,0 +1,4 @@
+title = Oxidization API for Mineclone 2
+name = mcl_oxidization
+author = Michieal, NO11
+description = Turns NO11's oxidization function into an API.

mods/ITEMS/mcl_copper/functions.lua

@@ -1,17 +1,5 @@
 --local deepslate_mod = minetest.get_modpath("mcl_deepslate")
 
-local function register_oxidation_abm(abm_name, node_name, oxidized_variant)
-	minetest.register_abm({
-		label = abm_name,
-		nodenames = { node_name },
-		interval = 500,
-		chance = 3,
-		action = function(pos, node)
-			minetest.swap_node(pos, { name = oxidized_variant, param2 = node.param2 })
-		end,
-	})
-end
-
 --[[
 local stairs = {
 	{"stair", "exposed", "_inner", "cut_inner"},

mods/ITEMS/mcl_copper/mod.conf

@@ -1,4 +1,4 @@
 name = mcl_copper
 author = NO11
-depends = mcl_core, mcl_sounds, mcl_stairs, mcl_util
+depends = mcl_core, mcl_sounds, mcl_stairs, mcl_util, mcl_oxidization
 description = Adds Copper Ore, blocks and items.