Reformat global & local functions

API.md

@@ -108,7 +108,7 @@ dripstone.register_droplet("mercury")
 dripstone.register_droplet("mineral_water")
 ```
 
-### dripstone.add_droplet_source(droplet, nodename)
+### dripstone.register_source(droplet, nodename)
 
 In order to let droplets stream down dripstone nodes, you need to define which
 nodes a full dripstone block can absorb liquid from. Absorbing liquid does not
@@ -120,10 +120,10 @@ However, you don't need to do this! You could use any node, as long as it has a
 name.
 
 ```lua
-dripstone.add_droplet_source("water", "mymod:swamp_water_source")
+dripstone.register_source("water", "mymod:swamp_water_source")
 ```
 
-### dripstone.add_droplet_catcher(droplet, oldnodename, newnodename)
+### dripstone.register_catcher(droplet, oldnodename, newnodename)
 
 Similarly, on the other side of the dripstone, you can create a catcher that
 can catch any of the liquid drops dripping down. You can use this to create
@@ -131,9 +131,9 @@ orchids, or to create other interactions with nodes that might change from a
 tiny bit of liquid.
 
 ```lua
-dripstone.add_droplet_catcher("water", "mymod:cauldron_empty", "mymod:water_cauldron")
+dripstone.register_catcher("water", "mymod:cauldron_empty", "mymod:water_cauldron")
-dripstone.add_droplet_catcher("water", "mymod:dirt", "mymod:farmland")
+dripstone.register_catcher("water", "mymod:dirt", "mymod:farmland")
-dripstone.add_droplet_catcher("lava", "mymod:precious_orchid", "mymod:dead_bush")
+dripstone.register_catcher("lava", "mymod:precious_orchid", "mymod:dead_bush")
 ```
 
 ### dripstone.register_dripstone(flavor, def)

api.lua

@@ -1,150 +1,80 @@
-dripstone = {}
+-- Nodes that function as cauldrons
+local CAULDRONS = {}
 
--- Internal values that cannot be changed by other mods (directly).
+-- How many nodes downwards a droplet is able to drop from a stalactite
-local internal = {
+-- before the droplet evaporates.
-	-- These values are not meant to be changed during runtime.
+local DROP_DOWN_REACH = 50
-	constant = {
-		-- How many nodes downwards a droplet is able to drop from a stalactite
-		-- before the droplet evaporates.
-		drop_down_reach = 50,
 
-		-- The number of seconds it takes for a dripstone node to grow 1 unit
+-- The number of seconds it takes for a dripstone node to grow 1 unit
-		-- (NOTE: Not one node size! One unit, which quadratically increases
+-- (NOTE: Not one node size! One unit, which quadratically increases
-		-- per node size.)
+-- per node size.)
-		growth_factor = 3,
+local GROWTH_FACTOR = 3
 
-		-- This mod's name.
+-- This mod's name.
-		modname = minetest.get_current_modname(),
+local MODNAME = minetest.get_current_modname()
 
-		-- The number of samples that each ABM should execute.
+-- The number of samples that each ABM should execute.
-		-- Make sure this is a whole number and less than speed_factor.
+-- Make sure this is a whole number and less than speed_factor.
-		samples_per_interval = 30,
+local SAMPLES_PER_INTERVAL = 30
 
-		-- Factor deciding this mod's relative speed.
+-- Nodes that provide droplets
-		-- Set this value to 1 if you wish to debug and let the dripstone
+local SOURCES = {}
-		-- change rapidly.
-		-- Rule of thumb: with a setting of 60, it takes a lava farm about 30
-		-- minutes to fill a cauldron with lava.
-		speed_factor = 60,
 
-		-- Names of the various dripstone widths
+-- Factor deciding this mod's relative speed.
-		width_names = {
+-- Set this value to 1 if you wish to debug and let the dripstone
-			"spike", "tiny", "small", "medium",
+-- change rapidly.
-			"great", "large", "huge", "block",
+-- Rule of thumb: with a setting of 60, it takes a lava farm about 30
-		},
+-- minutes to fill a cauldron with lava.
-	},
+local SPEED_FACTOR = 60
 
-	-- Nodes that function as cauldrons
+-- Nodes that allow a droplet to trickle down if it is directly below a
-	cauldrons = {},
-
-	-- Nodes that provide droplets
-	sources = {},
-
-	-- Nodes that allow a droplet to trickle down if it is directly below a
 	-- node that passes down that droplet.
-	tricklers = {},
+local TRICKLERS = {}
+
+-- Names of the various dripstone widths
+local WIDTH_NAMES = {
+	"spike", "tiny", "small", "medium", "great", "large", "huge", "block",
 }
 
-
 -------------------------------------------------------------------------------
 -------------------------------------------------------------------------------
----------------------------     PUBLIC API     --------------------------------
+-------------------------------------------------------------------------------
 -------------------------------------------------------------------------------
 -------------------------------------------------------------------------------
 
--- Register a node that can catch a droplet from a dripstone stalactite.
+-- Internal table that lets us define functions without directly exposing them.
-function dripstone.add_droplet_catcher(droplet, oldnodename, newnodename)
+local internal = {}
-	return internal.add_droplet_catcher(droplet, oldnodename, newnodename)
-end
-
--- Register a new source node that can provide droplets to dripstone blocks.
-function dripstone.add_droplet_source(droplet, nodename)
-	return internal.add_droplet_source(droplet, nodename)
-end
-
--- Register a new dripstone type.
---
--- {
--- 		-- What item is dropped when the dripstone is broken.
---		-- When left nil, the spike of the dripstone type is dropped.
---		drop = "dry"
---
--- 		-- What flavor to become when using liquid to grow.
--- 		-- Leave to nil when unable to grow.
--- 		grow_to = "dry"
---
--- 		-- When receiving a droplet of a given type, transform into a different
--- 		-- dripstone type. When a droplet is unspecified, the block cannot
--- 		-- receive the droplet.
--- 		on_droplet_receive = {
--- 			water = "watered",
--- 			lava = "molten",
--- 		}
---
---		-- Sounds that the dripstone makes
---      sounds = <standard sound definition for a node>
---
--- 		-- Node tiles for layout
--- 		tiles = <node tile layout>
---
--- 		-- Droplet type that the dripstone flavor can pass down.
--- 		-- When the droplet is passed down, the dripstone converts to the
---		-- "grow_to" type
--- 		trickle_down = "water"
--- 
---  	-- Speed of how often a droplet trickles down.
--- 		trickle_speed = 5
--- }
-function dripstone.register_dripstone(flavor, def)
-	return internal.register_dripstone_flavor(flavor, def)
-end
-
--- Register a new droplet type that can be absorbed and passed on by dripstone.
-function dripstone.register_droplet(droplet)
-	if internal.cauldrons[droplet] == nil then
-		internal.cauldrons[droplet] = {}
-	end
-	if internal.sources[droplet] == nil then
-		internal.sources[droplet] = {}
-	end
-	if internal.tricklers[droplet] == nil then
-		internal.tricklers[droplet] = {}
-	end
-end
-
--- Get a dripstone's node name based on its flavor and size.
-function dripstone.size_to_name(flavor, size)
-	return internal.size_to_name(flavor, size)
-end
-
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
 
 -- Add a droplet catcher, which is a node that allows a stalactite spike to
 -- change the name using a droplet.
-function internal.add_droplet_catcher(droplet, oldnodename, newnodename)
+function internal.register_droplet_catcher(droplet, oldnodename, newnodename)
-	return internal.register_cauldron(droplet, oldnodename, newnodename)
+	if CAULDRONS[droplet] == nil then
-end
-
-function internal.add_droplet_source(droplet, nodename)
-	if internal.sources[droplet] == nil then
 		internal.uninitialized_droplet_error(droplet)
 	end
-	table.insert(internal.sources[droplet], nodename)
+
+	CAULDRONS[droplet][oldnodename] = newnodename
+end
+
+function internal.register_droplet_source(droplet, nodename)
+	if SOURCES[droplet] == nil then
+		internal.uninitialized_droplet_error(droplet)
+	end
+	table.insert(SOURCES[droplet], nodename)
+
+	-- If the node can emit an infinite number of droplets,
+	-- it can also absorb an infinite number of droplets.
+	internal.register_droplet_catcher(droplet, oldnodename, newnodename)
 end
 
 -- Add a droplet trickler, which is a dripstone node that allows a droplet to
 -- be trickled down from the node directly above it.
 -- Running this function overrides previous values.
 function internal.add_droplet_trickler(droplet, oldnodename, newnodename)
-	if internal.tricklers[droplet] == nil then
+	if TRICKLERS[droplet] == nil then
 		internal.uninitialized_droplet_error(droplet)
 	end
 
-	internal.tricklers[droplet][oldnodename] = newnodename
+	TRICKLERS[droplet][oldnodename] = newnodename
 end
 
 -- Capitalize a string
@@ -161,7 +91,7 @@ function internal.drawtype_of_size(size)
 end
 
 function internal.hit_with_droplet(pos, node, droplet, spikename)
-	local m = internal.cauldrons[droplet] or {}
+	local m = CAULDRONS[droplet] or {}
 
 	if m[node.name] == nil then
 		-- Not a cauldron! Therefore we place a spike on top.
@@ -202,14 +132,14 @@ end
 function internal.register_absorb_abm(droplet, oldnodename, newnodename)
 	minetest.register_abm({
 		nodenames = { oldnodename },
-		interval = internal.constant.speed_factor / internal.constant.samples_per_interval,
+		interval = SPEED_FACTOR / SAMPLES_PER_INTERVAL,
-		chance = internal.constant.samples_per_interval,
+		chance = SAMPLES_PER_INTERVAL,
 		catch_up = true,
-		action = function (pos, node, aoc, aocw)
+		action = function(pos, node)
 			local pos_above = vector.offset(pos, 0, 1, 0)
 			local node_above = minetest.get_node(pos_above)
 
-			for _, source in pairs(internal.sources[droplet] or {}) do
+			for _, source in pairs(SOURCES[droplet] or {}) do
 				if node_above.name == source then
 					node.name = newnodename
 					minetest.set_node(pos, node)
@@ -220,14 +150,6 @@ function internal.register_absorb_abm(droplet, oldnodename, newnodename)
 	})
 end
 
-function internal.register_cauldron(droplet, oldnodename, newnodename)
-	if internal.cauldrons[droplet] == nil then
-		internal.uninitialized_droplet_error(droplet)
-	end
-
-	internal.cauldrons[droplet][oldnodename] = newnodename
-end
-
 function internal.register_dripstone_craft(newnodename, oldnodename, spikename)
 	minetest.register_craft({
 		output = newnodename,
@@ -276,9 +198,26 @@ function internal.register_dripstone_flavor(flavor, def)
 		end
 	end
 
-	-- Allow spike stalagmites to catch droplets
+	-- Makes dripstone stalagmite spikes delete droplets.
+	-- Without this, stalactites remain very thick and short while
+	-- stalagmites become absurdly long and thin.
+	-- A watered stalagmite can't accept a water droplet and the stalagmite
+	-- therefore grows one per droplet. To mitigate this, a watered spike
+	-- can still act as a water droplet cauldron without changing.
+	-- This way, no new droplets are passed on if the stalagmite is already
+	-- full, and the structure simply waits for a dripstone node to grow.
+	-- This behaviour is designed to be easy to override. (For example: if
+	-- you want a HEAVY watered dripstone type that holds 2 droplets.)
+	internal.register_droplet_catcher(
+		trickl,
+		internal.size_to_name(flavor, 1),
+		internal.size_to_name(flavor, 1)
+	)
+
+	-- Allow spike stalagmites to catch droplets.
+	-- This feature can override the former safeguard.
 	for droplet, new_flavor in pairs(on_droplet_receive) do
-		internal.register_cauldron(
+		internal.register_droplet_catcher(
 			droplet,
 			internal.size_to_name(flavor, 1),
 			internal.size_to_name(new_flavor, 1)
@@ -327,22 +266,6 @@ function internal.register_dripstone_flavor(flavor, def)
 			internal.size_to_name(dry_up, 1),
 			trickle_speed
 		)
-
-		-- Makes dripstone stalagmite spikes delete droplets.
-		-- Without this, stalactites remain very thick and short while
-		-- stalagmites become absurdly long and thin.
-		-- A watered stalagmite can't accept a water droplet and the stalagmite
-		-- therefore grows one per droplet. To mitigate this, a watered spike
-		-- can still act as a water droplet cauldron without changing.
-		-- This way, no new droplets are passed on if the stalagmite is already
-		-- full, and the structure simply waits for a dripstone node to grow.
-		-- This behaviour is designed to be easy to override. (For example: if
-		-- you want a HEAVY watered dripstone type that holds 2 droplets.)
-		internal.add_droplet_catcher(
-			trickl,
-			internal.size_to_name(flavor, 1),
-			internal.size_to_name(flavor, 1)
-		)
 	end
 end
 
@@ -387,10 +310,10 @@ end
 function internal.register_drop_down_abm(droplet, spikename, dryspikename, trickle_speed)
 	minetest.register_abm({
 		nodenames = { spikename },
-		interval = trickle_speed * internal.constant.speed_factor / internal.constant.samples_per_interval,
+		interval = trickle_speed * SPEED_FACTOR / SAMPLES_PER_INTERVAL,
-		chance = internal.constant.samples_per_interval,
+		chance = SAMPLES_PER_INTERVAL,
 		catch_up = true,
-		action = function (pos, node, aoc, aocw)
+		action = function(pos, node)
 			local pos_below = vector.offset(pos, 0, -1, 0)
 			local node_below = minetest.get_node(pos_below)
 
@@ -399,7 +322,7 @@ function internal.register_drop_down_abm(droplet, spikename, dryspikename, trick
 				return
 			end
 
-			for dy = 2, internal.constant.drop_down_reach, 1 do
+			for dy = 2, DROP_DOWN_REACH, 1 do
 				pos_below = vector.offset(pos, 0, -dy, 0)
 				node_below = minetest.get_node(pos_below)
 
@@ -421,14 +344,27 @@ function internal.register_drop_down_abm(droplet, spikename, dryspikename, trick
 	})
 end
 
+-- Register a new droplet type that can be absorbed and passed on by dripstone.
+function internal.register_droplet(droplet)
+	if CAULDRONS[droplet] == nil then
+		CAULDRONS[droplet] = {}
+	end
+	if SOURCES[droplet] == nil then
+		SOURCES[droplet] = {}
+	end
+	if TRICKLERS[droplet] == nil then
+		TRICKLERS[droplet] = {}
+	end
+end
+
 function internal.register_grow_abm(oldnodename, newnodename, width)
 	minetest.register_abm({
 		nodenames = { oldnodename },
 		-- 2(w + 1) * 2(w + 1) - 2w * 2w = 8w + 4
-		interval = (8 * width + 4) * internal.constant.speed_factor * internal.constant.growth_factor / internal.constant.samples_per_interval,
+		interval = (8 * width + 4) * SPEED_FACTOR * GROWTH_FACTOR / SAMPLES_PER_INTERVAL,
-		chance = internal.constant.samples_per_interval,
+		chance = SAMPLES_PER_INTERVAL,
 		catch_up = true,
-		action = function (pos, node, aoc, aocw)
+		action = function(pos, node)
 			node.name = newnodename
 			minetest.set_node(pos, node)
 		end
@@ -438,14 +374,14 @@ end
 function internal.register_trickle_down_abm(droplet, width, old_source, new_source, dry_up, trickle_speed)
 	minetest.register_abm({
 		nodenames = { old_source },
-		interval = trickle_speed * internal.constant.speed_factor / internal.constant.samples_per_interval,
+		interval = trickle_speed * SPEED_FACTOR / SAMPLES_PER_INTERVAL,
-		chance = internal.constant.samples_per_interval,
+		chance = SAMPLES_PER_INTERVAL,
 		catch_up = true,
-		action = function (pos, node, aoc, aocw)
+		action = function(pos, node)
 			local pos_below = vector.offset(pos, 0, -1, 0)
 			local node_below = minetest.get_node(pos_below)
 
-			local m = internal.tricklers[droplet] or {}
+			local m = TRICKLERS[droplet] or {}
 
 			if m[node_below.name] ~= nil then
 				-- Trickler found below!
@@ -456,7 +392,7 @@ function internal.register_trickle_down_abm(droplet, width, old_source, new_sour
 			else
 				return -- Prevent droplet from leaking away
 			end
-			
+
 			node.name = new_source
 			minetest.set_node(pos_below, node_below)
 			minetest.set_node(pos, node)
@@ -465,7 +401,7 @@ function internal.register_trickle_down_abm(droplet, width, old_source, new_sour
 end
 
 function internal.size_to_description(flavor, size)
-	local width_name = internal.constant.width_names[size]
+	local width_name = WIDTH_NAMES[size]
 
 	if size == 1 or size == 8 then
 		return internal.capitalize(flavor) .. " dripstone " .. width_name
@@ -475,8 +411,8 @@ function internal.size_to_description(flavor, size)
 end
 
 function internal.size_to_name(flavor, size)
-	local namespace = internal.constant.modname .. ":"
+	local namespace = MODNAME .. ":"
-	local width_name = internal.constant.width_names[size]
+	local width_name = WIDTH_NAMES[size]
 
 	if size == 1 or size == 8 then
 		return namespace .. flavor .. "_dripstone_" .. width_name
@@ -490,3 +426,26 @@ function internal.uninitialized_droplet_error(droplet)
 		"Droplet " .. droplet .. " has not been initialized yet!"
 	)
 end
+
+-------------------------------------------------------------------------------
+-------------------------------------------------------------------------------
+---------------------------     PUBLIC API     --------------------------------
+-------------------------------------------------------------------------------
+-------------------------------------------------------------------------------
+
+dripstone = {
+	-- Register a node that can catch a droplet from a dripstone stalactite.
+	register_catcher = internal.register_droplet_catcher,
+
+	-- Register a new dripstone type.
+	register_dripstone = internal.register_dripstone_flavor,
+
+	-- Register a new droplet type that can be absorbed and passed on by dripstone.
+	register_droplet = internal.register_droplet,
+
+	-- Register a source node that can provide droplets to dripstone blocks.
+	register_source = internal.register_droplet_source,
+
+	-- Get a dripstone's node name based on its flavor and size.
+	size_to_name = internal.size_to_name,
+}

init.lua

@@ -72,16 +72,16 @@ dripstone.register_dripstone("hardened", {
 -- Register droplet sources above dripstone blocks
 
 if minetest.get_modpath("default") then
-	dripstone.add_droplet_source("water", "default:river_water_source")
+	dripstone.register_source("water", "default:river_water_source")
-	dripstone.add_droplet_source("water", "default:water_source")
+	dripstone.register_source("water", "default:water_source")
-	dripstone.add_droplet_source("lava", "default:lava_source")
+	dripstone.register_source("lava", "default:lava_source")
 end
 
 if minetest.get_modpath("mcl_core") then
-	dripstone.add_droplet_source("water", "mcl_core:water_source")
+	dripstone.register_source("water", "mcl_core:water_source")
-	dripstone.add_droplet_source("lava", "mcl_core:lava_source")
+	dripstone.register_source("lava", "mcl_core:lava_source")
 end
 
 if minetest.get_modpath("mclx_core") then
-	dripstone.add_droplet_source("water", "mclx_core:river_water_source")
+	dripstone.register_source("water", "mclx_core:river_water_source")
 end