Damage anvil after falling

API.md

@@ -21,6 +21,7 @@ All nodes can have these fields:
 
 * `_mcl_hardness`: Hardness of the block, ranges from 0 to infinity (represented by -1). Determines digging times. Default: 0
 * `_mcl_blast_resistance`: How well this block blocks and resists explosions. Default: 0
+* `_mcl_after_falling(pos)`: Called after a falling node finished falling and turned into a node.
 
 Use the `mcl_sounds` mod for the sounds.
 

mods/ENTITIES/mcl_falling_nodes/init.lua

@@ -1,6 +1,14 @@
 local dmes = minetest.get_modpath("mcl_death_messages") ~= nil
 local hung = minetest.get_modpath("mcl_hunger") ~= nil
 
+local get_falling_depth = function(self)
+	if not self._startpos then
+		-- Fallback
+		self._startpos = self.object:get_pos()
+	end
+	return self._startpos.y - vector.round(self.object:get_pos()).y
+end
+
 local deal_falling_damage = function(self, dtime)
 	if minetest.get_item_group(self.node.name, "falling_node_damage") == 0 then
 		return
@@ -10,6 +18,7 @@ local deal_falling_damage = function(self, dtime)
 	-- TODO: Support smashing other objects, too.
 	local pos = self.object:get_pos()
 	if not self._startpos then
+		-- Fallback
 		self._startpos = pos
 	end
 	local objs = minetest.get_objects_inside_radius(pos, 1)
@@ -128,6 +137,10 @@ minetest.register_entity(":__builtin:falling_node", {
 		elseif staticdata ~= "" then
 			self:set_node({name = staticdata})
 		end
+		if not self._startpos then
+			self._startpos = self.object:get_pos()
+		end
+		self._startpos = vector.round(self._startpos)
 	end,
 
 	on_step = function(self, dtime)
@@ -167,6 +180,9 @@ minetest.register_entity(":__builtin:falling_node", {
 					addlevel = bcd.leveled
 				end
 				if minetest.add_node_level(bcp, addlevel) == 0 then
+					if minetest.registered_nodes[self.node.name]._mcl_after_falling then
+						minetest.registered_nodes[self.node.name]._mcl_after_falling(bcp, get_falling_depth(self))
+					end
 					deal_falling_damage(self, dtime)
 					self.object:remove()
 					return
@@ -190,6 +206,9 @@ minetest.register_entity(":__builtin:falling_node", {
 				end
 				if minetest.registered_nodes[self.node.name] then
 					minetest.add_node(np, self.node)
+					if minetest.registered_nodes[self.node.name]._mcl_after_falling then
+						minetest.registered_nodes[self.node.name]._mcl_after_falling(np, get_falling_depth(self))
+					end
 					if self.meta then
 						local meta = minetest.get_meta(np)
 						meta:from_table(self.meta)
@@ -223,6 +242,9 @@ minetest.register_entity(":__builtin:falling_node", {
 				local npos3 = table.copy(npos)
 				npos3.y = npos3.y - 1
 				minetest.add_node(npos3, self.node)
+				if minetest.registered_nodes[self.node.name]._mcl_after_falling then
+					minetest.registered_nodes[self.node.name]._mcl_after_falling(npos3, get_falling_depth(self))
+				end
 				deal_falling_damage(self, dtime)
 				self.object:remove()
 				minetest.check_for_falling(npos3)

mods/ITEMS/mcl_anvils/init.lua

@@ -204,13 +204,10 @@ local function drop_anvil_items(pos, meta)
 	end
 end
 
--- Roll a virtual dice and with a low chance, damage the anvil by 1 level.
+-- Damage the anvil by 1 level.
 -- Destroy anvil when at highest damage level.
 -- Returns true if anvil was destroyed.
 local function damage_anvil(pos)
-	local r = math.random(1, 100)
-	-- 12% chance
-	if r <= 12 then
 	local node = minetest.get_node(pos)
 	local new
 	if node.name == "mcl_anvils:anvil" then
@@ -230,8 +227,27 @@ local function damage_anvil(pos)
 		return true
 	end
 end
+
+-- Roll a virtual dice and damage anvil at a low chance.
+local function damage_anvil_by_using(pos)
+	local r = math.random(1, 100)
+	-- 12% chance
+	if r <= 12 then
+		return damage_anvil(pos)
+	else
 		return false
 	end
+end
+
+local function damage_anvil_by_falling(pos, distance)
+	local chance
+	local r = math.random(1, 100)
+	if distance > 1 then
+		if r <= (5*distance) then
+			damage_anvil(pos)
+		end
+	end
+end
 
 local anvildef = {
 	groups = {pickaxey=1, falling_node=1, falling_node_damage=1, crush_after_fall=1, deco_block=1, anvil=1},
@@ -252,6 +268,7 @@ local anvildef = {
 	sounds = mcl_sounds.node_sound_metal_defaults(),
 	_mcl_blast_resistance = 6000,
 	_mcl_hardness = 5,
+	_mcl_after_falling = damage_anvil_by_falling,
 
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		local meta = minetest.get_meta(pos) 
@@ -301,7 +318,7 @@ local anvildef = {
 		update_anvil_slots(meta)
 
 		if from_list == "output" then
-			local destroyed = damage_anvil(pos, player)
+			local destroyed = damage_anvil_by_using(pos)
 			-- Close formspec if anvil was destroyed
 			if destroyed then
 				--[[ Closing the formspec w/ emptyformname is discouraged. But this is justified
@@ -354,7 +371,7 @@ local anvildef = {
 					inv:set_stack("input", 2, input2)
 				end
 			end
-			local destroyed = damage_anvil(pos, player)
+			local destroyed = damage_anvil_by_using(pos)
 			-- Close formspec if anvil was destroyed
 			if destroyed then
 				-- See above for justification.
@@ -404,7 +421,7 @@ anvildef0._doc_items_usagehelp =
 "• Tool + Tool: Place two tools of the same type in the input slots. The “health” of the repaired tool is the sum of the “health” of both input tools, plus a 12% bonus.".."\n"..
 "• Tool + Material: Some tools can also be repaired by combining them with an item that it's made of. For example, iron pickaxes can be repaired with iron ingots. This repairs the tool by 25%.".."\n"..
 "Armor counts as a tool. It is possible to repair and rename a tool in a single step.".."\n\n"..
-"The anvil has limited durability and 3 damage levels: undamaged, slightly damaged and very damaged. Each time you repair or rename something, there is a 12% chance the anvil gets damaged. If a very damaged anvil is damaged again, it is destroyed."
+"The anvil has limited durability and 3 damage levels: undamaged, slightly damaged and very damaged. Each time you repair or rename something, there is a 12% chance the anvil gets damaged. Anvils also have a chance of being damaged when they fall by more than 1 block. If a very damaged anvil is damaged again, it is destroyed."
 
 local anvildef1 = table.copy(anvildef)
 anvildef1.description = "Slightly Damaged Anvil"