Merge branch 'main' into VorTechnix

.docs/Reference.html

@@ -11,21 +11,6 @@
 		<p>After the contents, there is a <a href="#filter">filter box</a> for filtering the detailed explanations to quickly find the one you're after.</p>
 	</section>
 	
-	<section class="panel-generic">
-		<h2 id="contents" class="linked-section-heading">
-			<a class="section-link" href="#{{ section.slug }}">&#x1f517; <!-- Link Symbol --></a>
-			<span>Contents</span>
-		</h2>
-		<p>TODO: Group commands here by category (*especially* the meta commands)</p>
-		<ul class="command-list">
-			{% for section in sections_help %}
-			<li><a href="#{{ section.slug }}">
-				<code>{{ section.title }}</code>
-			</a></li>
-			{% endfor %}
-		</ul>
-	</section>
-	
 	<section id="filter" class="panel-generic">
 		<div class="form-item bigsearch">
 			<label for="input-filter">Filter:</label>
@@ -37,6 +22,21 @@
 		</div>
 	</section>
 	
+	<section class="panel-generic">
+		<h2 id="contents" class="linked-section-heading">
+			<a class="section-link" href="#{{ section.slug }}">&#x1f517; <!-- Link Symbol --></a>
+			<span>Contents</span>
+		</h2>
+		<p>TODO: Group commands here by category (*especially* the meta commands)</p>
+		<ul class="command-list">
+			{% for section in sections_help %}
+			<li data-filtermode-force="all"><a href="#{{ section.slug }}">
+				<code>{{ section.title }}</code>
+			</a></li>
+			{% endfor %}
+		</ul>
+	</section>
+	
 	<script>
 		function search_text(query, text) {
 			return text.toLocaleLowerCase().includes(query);
@@ -45,19 +45,27 @@
 		function do_filter() {
 			let el_search = document.querySelector("#input-filter");
 			let el_searchall = document.querySelector("#input-searchall");
-			let els_sections = document.querySelectorAll("section.filterable");
+			/* Filterable items
+			 - Sections
+			 - Commands in the command list
+			 */
+			let els_filterable = document.querySelectorAll("section.filterable, .command-list > li");
 			
 			let query = el_search.value.toLocaleLowerCase();
 			
 			let mode = el_searchall.checked ? "all" : "header";
 			console.log(`SEARCH | mode`, mode, `query`, query);
 			
-			for(let i = 0; i < els_sections.length; i++) {
+			for(let i = 0; i < els_filterable.length; i++) {
-				let el_next = els_sections[i];
+				let el_next = els_filterable[i];
+				
+				let mode_this = mode;
+				if(typeof el_next.dataset.filtermodeForce == "string")
+					mode_this = el_next.dataset.filtermodeForce;
 				
 				let show = true;
 				if(query.length > 0) {
-					switch(mode) {
+					switch(mode_this) {
 						case "all":
 							show = search_text(query,
 								el_next.textContent

.tests/Vector3/max.test.lua

@@ -19,6 +19,24 @@ describe("Vector3.max", function()
 			Vector3.max(a, b)
 		)
 	end)
+	it("should work with scalar numbers", function()
+		local a = Vector3.new(16, 1, 16)
+		local b = 2
+		
+		assert.are.same(
+			Vector3.new(16, 2, 16),
+			Vector3.max(a, b)
+		)
+	end)
+	it("should work with scalar numbers both ways around", function()
+		local a = Vector3.new(16, 1, 16)
+		local b = 2
+		
+		assert.are.same(
+			Vector3.new(16, 2, 16),
+			Vector3.max(b, a)
+		)
+	end)
 	it("should work with negative vectors", function()
 		local a = Vector3.new(-9, -16, -25)
 		local b = Vector3.new(-3, -6, -2)

.tests/Vector3/min.test.lua

@@ -19,6 +19,24 @@ describe("Vector3.min", function()
 			Vector3.min(a, b)
 		)
 	end)
+	it("should work with scalar numbers", function()
+		local a = Vector3.new(16, 1, 16)
+		local b = 2
+		
+		assert.are.same(
+			Vector3.new(2, 1, 2),
+			Vector3.min(a, b)
+		)
+	end)
+	it("should work with scalar numbers both ways around", function()
+		local a = Vector3.new(16, 1, 16)
+		local b = 2
+		
+		assert.are.same(
+			Vector3.new(2, 1, 2),
+			Vector3.min(b, a)
+		)
+	end)
 	it("should work with negative vectors", function()
 		local a = Vector3.new(-9, -16, -25)
 		local b = Vector3.new(-3, -6, -2)

.tests/Vector3/new.test.lua

@@ -7,6 +7,12 @@ describe("Vector3.add", function()
 			Vector3.new(3, 4, 5)
 		)
 	end)
+	it("should default to (0, 0, 0)", function()
+		assert.are.same(
+			{ x = 0, y = 0, z = 0 },
+			Vector3.new()
+		)
+	end)
 	it("should not throw an error on invalid x", function()
 		assert.has_no.errors(function()
 			Vector3.new("cheese", 4, 5)

CHANGELOG.md

@@ -12,6 +12,9 @@ Note to self: See the bottom of this file for the release template text.
  - Add `//sshift`  (_selection shift_) - WorldEdit cuboid manipulator replacements implemented by @VorTechnix.
  - Use [luacheck](https://github.com/mpeterv/luacheck) to find and fix a large number of bugs and other issues
  - Multiple commands: Allow using quotes (`"thing"`, `'thing'`) to quote values when splitting
+ - `//layers`: Add optional slope constraint (inspired by [WorldPainter](https://worldpainter.net/))
+ - `//bonemeal`: Add optional node list constraint
+ - `//walls`: Add optional thickness argument
 
 
 ## v1.12: The selection tools update (26th June 2021)

Chat-Command-Reference.md

@@ -40,16 +40,21 @@ Note also that columns without any air nodes in them at all are also skipped, so
 //overlay dirt 90% stone 10%
 ```
 
-## `//layers [<node_name_1> [<layer_count_1>]] [<node_name_2> [<layer_count_2>]] ...`
+## `//layers [<max_slope|min_slope..max_slope>] [<node_name_1> [<layer_count_1>]] [<node_name_2> [<layer_count_2>]] ...`
 Finds the first non-air node in each column and works downwards, replacing non-air nodes with a defined list of nodes in sequence. Like WorldEdit for Minecraft's `//naturalize` command, and also similar to [`we_env`'s `//populate`](https://github.com/sfan5/we_env). Speaking of, this command has `//naturalise` and `//naturalize` as aliases. Defaults to 1 layer of grass followed by 3 layers of dirt.
 
-The list of nodes has a form similar to that of a chance list you might find in `//replacemix`, `//overlay`, or `//mix` - see the examples below. If the numberr of layers isn't specified, `1` is assumed (i.e. a single layer).
+Since WorldEditAdditions v1.13, a maximum and minimum slope is optionally accepted, and constrains the columns in the defined region that `//layers` will operate on. For example, specifying a value of `20` would mean that only columns with a slop less than or equal to 20° (degrees, not radians) will be operated on. A value of `45..60` would mean that only columns with a slope between 45° and 60° will be operated on.
+
+The list of nodes has a form similar to that of a chance list you might find in `//replacemix`, `//overlay`, or `//mix` - see the examples below. If the number of layers isn't specified, `1` is assumed (i.e. a single layer).
+
 
 ```weacmd
 //layers dirt_with_grass dirt 3
 //layers sand 5 sandstone 4 desert_stone 2
 //layers brick stone 3
 //layers cobble 2 dirt
+//layers 45..60 dirt_with_snow dirt 2
+//layers 30 snowblock dirt_with_snow dirt 2
 ```
 
 ## `//forest [<density>] <sapling_a> [<chance_a>] <sapling_b> [<chance_b>] [<sapling_N> [<chance_N>]] ...`
@@ -220,7 +225,7 @@ Additional examples:
 //maze3d stone 6 3 3 54321
 ```
 
-## `//bonemeal [<strength> [<chance>]]`
+## `//bonemeal [<strength> [<chance> [<node_name> [<node_name> ...]]]]`
 Requires the [`bonemeal`](https://content.minetest.net/packages/TenPlus1/bonemeal/) ([repo](https://notabug.org/TenPlus1/bonemeal/)) mod (otherwise _WorldEditAdditions_ will not register this command and output a message to the server log). Alias: `//flora`.
 
 Bonemeals all eligible nodes in the current region. An eligible node is one that has an air node directly above it - note that just because a node is eligible doesn't mean to say that something will actually happen when the `bonemeal` mod bonemeals it.
@@ -235,6 +240,9 @@ For example, a chance number of 2 would mean a 50% chance that any given eligibl
 
 Since WorldEditAdditions v1.12, a percentage chance is also supported. This is denoted by suffixing a number with a percent sign (e.g. `//bonemeal 1 25%`).
 
+Since WorldEditAdditions v1.13, a list of node names is also optionally supported. This will constrain bonemeal operations to be performed only on the node names listed.
+
+
 ```weacmd
 //bonemeal
 //bonemeal 3 25
@@ -242,15 +250,19 @@ Since WorldEditAdditions v1.12, a percentage chance is also supported. This is d
 //bonemeal 1 10
 //bonemeal 2 15
 //bonemeal 2 10%
+//bonemeal 2 10% dirt
+//bonemeal 4 50 ethereal:grove_dirt
 ```
 
-## `//walls <replace_node>`
+## `//walls <replace_node> [<thickness=1>]`
-Creates vertical walls of `<replace_node>` around the inside edges of the defined region.
+Creates vertical walls of `<replace_node>` around the inside edges of the defined region, optionally specifying the thickness thereof.
 
 ```weacmd
 //walls dirt
 //walls stone
 //walls goldblock
+//walls sandstone 2
+//walls glass 4
 ```
 
 ## `//wbox <replace_node>`

worldeditadditions/init.lua

@@ -16,6 +16,7 @@ wea.Mesh, wea.Face = dofile(wea.modpath.."/utils/mesh.lua")
 
 wea.Queue = dofile(wea.modpath.."/utils/queue.lua")
 wea.LRU = dofile(wea.modpath.."/utils/lru.lua")
+wea.inspect = dofile(wea.modpath.."/utils/inspect.lua")
 
 wea.bit = dofile(wea.modpath.."/utils/bit.lua")
 

worldeditadditions/lib/bonemeal.lua

@@ -4,7 +4,8 @@
 
 -- strength		The strength to apply - see bonemeal:on_use
 -- chance		Positive integer that represents the chance bonemealing will occur
-function worldeditadditions.bonemeal(pos1, pos2, strength, chance)
+function worldeditadditions.bonemeal(pos1, pos2, strength, chance, nodename_list)
+	if not nodename_list then nodename_list = {} end
 	pos1, pos2 = worldedit.sort_pos(pos1, pos2)
 	-- pos2 will always have the highest co-ordinates now
 	
@@ -14,6 +15,12 @@ function worldeditadditions.bonemeal(pos1, pos2, strength, chance)
 		return false, "Bonemeal mod not loaded"
 	end
 	
+	local node_list = worldeditadditions.table.map(nodename_list, function(nodename)
+		return minetest.get_content_id(nodename)
+	end)
+	local node_list_count = #nodename_list
+	
+	
 	-- Fetch the nodes in the specified area
 	local manip, area = worldedit.manip_helpers.init(pos1, pos2)
 	local data = manip:get_data()
@@ -26,10 +33,17 @@ function worldeditadditions.bonemeal(pos1, pos2, strength, chance)
 	for z = pos2.z, pos1.z, -1 do
 		for x = pos2.x, pos1.x, -1 do
 			for y = pos2.y, pos1.y, -1 do
-				if not worldeditadditions.is_airlike(data[area:index(x, y, z)]) then
+				local i = area:index(x, y, z)
+				if not worldeditadditions.is_airlike(data[i]) then
+					local should_bonemeal = true
+					if node_list_count > 0 and not worldeditadditions.table.contains(node_list, data[i]) then
+						should_bonemeal = false
+					end
+					
+					
 					-- It's not an air node, so let's try to bonemeal it
 					
-					if math.random(0, chance - 1) == 0 then
+					if should_bonemeal and math.random(0, chance - 1) == 0 then
 						bonemeal:on_use(
 							{ x = x, y = y, z = z },
 							strength,

worldeditadditions/lib/layers.lua

@@ -1,8 +1,30 @@
---- Overlap command. Places a specified node on top of each column.
+-- ██       █████  ██    ██ ███████ ██████  ███████
--- @module worldeditadditions.layers
+-- ██      ██   ██  ██  ██  ██      ██   ██ ██
+-- ██      ███████   ████   █████   ██████  ███████
+-- ██      ██   ██    ██    ██      ██   ██      ██
+-- ███████ ██   ██    ██    ███████ ██   ██ ███████
 
-function worldeditadditions.layers(pos1, pos2, node_weights)
+local wea = worldeditadditions
-	pos1, pos2 = worldedit.sort_pos(pos1, pos2)
+
+local function print_slopes(slopemap, width)
+	local copy = wea.table.shallowcopy(slopemap)
+	for key,value in pairs(copy) do
+		copy[key] = wea.round(math.deg(value), 2)
+	end
+	
+	worldeditadditions.format.array_2d(copy, width)
+end
+
+--- Replaces the non-air nodes in each column with a list of nodes from top to bottom.
+-- @param	pos1			Vector		Position 1 of the region to operate on
+-- @param	pos2			Vector		Position 2 of the region to operate on
+-- @param	node_weights	string[]	
+-- @param	min_slope		number?		
+-- @param	max_slope		number?		
+function worldeditadditions.layers(pos1, pos2, node_weights, min_slope, max_slope)
+	pos1, pos2 = wea.Vector3.sort(pos1, pos2)
+	if not min_slope then min_slope = math.rad(0) end
+	if not max_slope then max_slope = math.rad(180) end
 	-- pos2 will always have the highest co-ordinates now
 	
 	-- Fetch the nodes in the specified area
@@ -11,38 +33,58 @@ function worldeditadditions.layers(pos1, pos2, node_weights)
 	
 	local node_id_ignore = minetest.get_content_id("ignore")
 	
-	local node_ids, node_ids_count = worldeditadditions.unwind_node_list(node_weights)
+	local node_ids, node_ids_count = wea.unwind_node_list(node_weights)
 	
-	-- minetest.log("action", "pos1: " .. worldeditadditions.vector.tostring(pos1))
+	local heightmap, heightmap_size = wea.make_heightmap(
-	-- minetest.log("action", "pos2: " .. worldeditadditions.vector.tostring(pos2))
+		pos1, pos2,
+		manip, area, data
+	)
+	local slopemap = wea.calculate_slopes(heightmap, heightmap_size)
+	-- worldeditadditions.format.array_2d(heightmap, heightmap_size.x)
+	-- print_slopes(slopemap, heightmap_size.x)
+	--luacheck:ignore 311
+	heightmap = nil -- Just in case Lua wants to garbage collect it
+	
+	
+	-- minetest.log("action", "pos1: " .. wea.vector.tostring(pos1))
+	-- minetest.log("action", "pos2: " .. wea.vector.tostring(pos2))
 	-- for i,v in ipairs(node_ids) do
 	-- 	print("[layer] i", i, "node id", v)
 	-- end
 	-- z y x is the preferred loop order, but that isn't really possible here
 	
-	local changes = { replaced = 0, skipped_columns = 0 }
+	local changes = { replaced = 0, skipped_columns = 0, skipped_columns_slope = 0 }
 	for z = pos2.z, pos1.z, -1 do
 		for x = pos2.x, pos1.x, -1 do
 			local next_index = 1 -- We use table.insert() in make_weighted
 			local placed_node = false
 			
-			for y = pos2.y, pos1.y, -1 do
+			local hi = (z-pos1.z)*heightmap_size.x + (x-pos1.x)
-				local i = area:index(x, y, z)
+			
-				
+			-- print("DEBUG hi", hi, "x", x, "z", z, "slope", slopemap[hi], "as deg", math.deg(slopemap[hi]))
-				local is_air = worldeditadditions.is_airlike(data[i])
+			
-				local is_ignore = data[i] == node_id_ignore
+			-- Again, Lua 5.1 doesn't have a continue statement :-/
-				
+			if slopemap[hi] >= min_slope and slopemap[hi] <= max_slope then
-				if not is_air and not is_ignore then
+				for y = pos2.y, pos1.y, -1 do
-					-- It's not an airlike node or something else odd
+					local i = area:index(x, y, z)
-					data[i] = node_ids[next_index]
-					next_index = next_index + 1
-					changes.replaced = changes.replaced + 1
 					
-					-- If we're done replacing nodes in this column, move to the next one
+					local is_air = wea.is_airlike(data[i])
-					if next_index > #node_ids then
+					local is_ignore = data[i] == node_id_ignore
-						break
+					
+					if not is_air and not is_ignore then
+						-- It's not an airlike node or something else odd
+						data[i] = node_ids[next_index]
+						next_index = next_index + 1
+						changes.replaced = changes.replaced + 1
+						
+						-- If we're done replacing nodes in this column, move to the next one
+						if next_index > #node_ids then
+							break
+						end
 					end
 				end
+			else
+				changes.skipped_columns_slope = changes.skipped_columns_slope + 1
 			end
 			
 			if not placed_node then

worldeditadditions/lib/walls.lua

@@ -1,5 +1,3 @@
---- Creates vertical walls on the inside of the defined region.
--- @module worldeditadditions.walls
 
 -- ██     ██  █████  ██      ██      ███████
 -- ██     ██ ██   ██ ██      ██      ██
@@ -7,8 +5,15 @@
 -- ██ ███ ██ ██   ██ ██      ██           ██
 --  ███ ███  ██   ██ ███████ ███████ ███████
 
-function worldeditadditions.walls(pos1, pos2, node_name)
+--- Creates vertical walls on the inside of the defined region.
+-- @apipath worldeditadditions.walls
+-- @param	pos1		Vector	Position 1 of the defined region,
+-- @param	pos2		Vector	Position 2 of the defined region.
+-- @param	node_name	string	The name of the node to use to create the walls with.
+-- @param	thickness	number?	The thickness of the walls to create. Default: 1
+function worldeditadditions.walls(pos1, pos2, node_name, thickness)
 	pos1, pos2 = worldedit.sort_pos(pos1, pos2)
+	if not thickness then thickness = 1 end
 	-- pos2 will always have the highest co-ordinates now
 	
 	-- Fetch the nodes in the specified area
@@ -22,7 +27,10 @@ function worldeditadditions.walls(pos1, pos2, node_name)
 	for z = pos2.z, pos1.z, -1 do
 		for y = pos2.y, pos1.y, -1 do
 			for x = pos2.x, pos1.x, -1 do
-				if x == pos1.x or x == pos2.x or z == pos1.z or z == pos2.z then
+				if math.abs(x - pos1.x) < thickness
+					or math.abs(x - pos2.x) < thickness
+					or math.abs(z - pos1.z) < thickness
+					or math.abs(z - pos2.z) < thickness then
 					data[area:index(x, y, z)] = node_id
 					count_replaced = count_replaced + 1
 				end

worldeditadditions/utils/inspect.lua

@@ -0,0 +1,37 @@
+--- Serialises an arbitrary value to a string.
+-- Note that although the resulting table *looks* like valid Lua, it isn't.
+-- @param	item		any		Input item to serialise.
+-- @param	sep			string	key value seperator
+-- @param	new_line	string	key value pair delimiter
+-- @return	string	concatenated table pairs
+local function inspect(item, maxdepth)
+	if not maxdepth then maxdepth = 3 end
+	if type(item) ~= "table" then
+		if type(item) == "string" then return "\""..item.."\"" end
+		return tostring(item)
+	end
+	if maxdepth < 1 then return "[truncated]" end
+	
+	local result = { "{\n" }
+	for key,value in pairs(item) do
+		local value_text = inspect(value, maxdepth - 1)
+			:gsub("\n", "\n\t")
+		table.insert(result, "\t"..tostring(key).." = ".."("..type(value)..") "..value_text.."\n")
+	end
+	table.insert(result, "}")
+	return table.concat(result,"")
+end
+
+-- local test = {
+-- 	a = { x = 5, y = 7, z = -6 },
+-- 	http = {
+-- 		port = 80,
+-- 		protocol = "http"
+-- 	},
+-- 	mode = "do_stuff",
+-- 	apple = false,
+-- 	deepa = { deepb = { deepc = { yay = "Happy Birthday!" } }}
+-- }
+-- print(inspect(test))
+
+return inspect

worldeditadditions/utils/queue.lua

@@ -1,16 +1,22 @@
 -------------------------------------------------------------------------------
---- A Queue implementation, taken & adapted from https://www.lua.org/pil/11.4.html
+--- A Queue implementation
+-- Taken & adapted from https://www.lua.org/pil/11.4.html
 -- @submodule worldeditadditions.utils.queue
-
+-- @class
 local Queue = {}
 Queue.__index = Queue
 
+--- Creates a new queue instance.
+-- @returns	Queue
 function Queue.new()
 	local result = { first = 0, last = -1, items = {} }
 	setmetatable(result, Queue)
 	return result
 end
 
+--- Adds a new value to the end of the queue.
+-- @param	value	any		The new value to add to the end of the queue.
+-- @returns	number	The index of the value that was added to the queue.
 function Queue:enqueue(value)
 	local new_last = self.last + 1
 	self.last = new_last
@@ -18,6 +24,9 @@ function Queue:enqueue(value)
 	return new_last
 end
 
+--- Determines whether a  given value is present in this queue or not.
+-- @param	value	any		The value to check.
+-- @returns	bool	Whether the given value exists in the queue or not.
 function Queue:contains(value)
 	for i=self.first,self.last do
 		if self.items[i] == value then
@@ -27,14 +36,22 @@ function Queue:contains(value)
 	return false
 end
 
+--- Returns whether the queue is empty or not.
+-- @returns	bool	Whether the queue is empty or not.
 function Queue:is_empty()
 	return self.first > self.last
 end
 
+--- Removes the item with the given index from the queue.
+-- Item indexes do not change as the items in a queue are added and removed.
+-- @param		number		The index of the item to remove from the queue.
+-- @returns		nil
 function Queue:remove_index(index)
 	self.items[index] = nil
 end
 
+--- Dequeues an item from the front of the queue.
+-- @returns		any|nil		Returns the item at the front of the queue, or nil if no items are currently enqueued. 
 function Queue:dequeue()
 	if Queue.is_empty(self) then
 		error("Error: The self is empty!")
@@ -53,4 +70,5 @@ function Queue:dequeue()
 	return value
 end
 
+
 return Queue

worldeditadditions/utils/terrain.lua

@@ -1,3 +1,4 @@
+local wea = worldeditadditions
 
 --- Given a manip object and associates, generates a 2D x/z heightmap.
 -- Note that pos1 and pos2 should have already been pushed through
@@ -20,7 +21,7 @@ function worldeditadditions.make_heightmap(pos1, pos2, manip, area, data)
 			-- Scan each column top to bottom
 			for y = pos2.y+1, pos1.y, -1 do
 				local i = area:index(x, y, z)
-				if not (worldeditadditions.is_airlike(data[i]) or worldeditadditions.is_liquidlike(data[i])) then
+				if not (wea.is_airlike(data[i]) or wea.is_liquidlike(data[i])) then
 					-- It's the first non-airlike node in this column
 					-- Start heightmap values from 1 (i.e. there's at least 1 node in the column)
 					heightmap[hi] = (y - pos1.y) + 1 
@@ -48,7 +49,7 @@ end
 -- will have the z and y values swapped.
 -- @param	heightmap		table	A ZERO indexed flat heightmap. See worldeditadditions.make_heightmap().
 -- @param	heightmap_size	int[]	The size of the heightmap in the form [ z, x ]
--- @return	Vector[]		The calculated normal map, in the same form as the input heightmap. Each element of the array is a 3D Vector (i.e. { x, y, z }) representing a normal.
+-- @return	Vector[]		The calculated normal map, in the same form as the input heightmap. Each element of the array is a Vector3 instance representing a normal.
 function worldeditadditions.calculate_normals(heightmap, heightmap_size)
 	-- print("heightmap_size: "..heightmap_size.x.."x"..heightmap_size.z)
 	local result = {}
@@ -72,18 +73,43 @@ function worldeditadditions.calculate_normals(heightmap, heightmap_size)
 			-- print("[normals] LEFT	| index", z*heightmap_size.x + (x-1), "x", x, "x-1", x - 1, "left", left, "limit", 0)
 			-- print("[normals] RIGHT	| index", z*heightmap_size.x + (x+1), "x", x, "x+1", x + 1, "right", right, "limit", heightmap_size.x-1)
 			
-			result[hi] = worldeditadditions.vector.normalize({
+			result[hi] = wea.Vector3.new(
-				x = left - right,
+				left - right,	-- x
-				y = 2, -- Z & Y are flipped
+				2,				-- y - Z & Y are flipped
-				z = down - up
+				down - up		-- z
-			})
+			):normalise()
 			
-			-- print("[normals] at "..hi.." ("..x..", "..z..") normal "..worldeditadditions.vector.tostring(result[hi]))
+			-- print("[normals] at "..hi.." ("..x..", "..z..") normal "..result[hi])
 		end
 	end
 	return result
 end
 
+--- Converts a 2d heightmap into slope values in radians.
+-- Convert a radians to degrees by doing (radians*math.pi) / 180 for display,
+-- but it is STRONGLY recommended to keep all internal calculations in radians.
+-- @param	heightmap		table	A ZERO indexed flat heightmap. See worldeditadditions.make_heightmap().
+-- @param	heightmap_size	int[]	The size of the heightmap in the form [ z, x ]
+-- @return	Vector[]		The calculated slope map, in the same form as the input heightmap. Each element of the array is a (floating-point) number representing the slope in that cell in radians.
+function worldeditadditions.calculate_slopes(heightmap, heightmap_size)
+	local normals = worldeditadditions.calculate_normals(heightmap, heightmap_size)
+	local slopes = {  }
+	
+	local up = wea.Vector3.new(0, 1, 0) -- Z & Y are flipped
+	
+	for z = heightmap_size.z-1, 0, -1 do
+		for x = heightmap_size.x-1, 0, -1 do
+			local hi = z*heightmap_size.x + x
+			
+			-- Ref https://stackoverflow.com/a/16669463/1460422
+			-- slopes[hi] = wea.Vector3.dot_product(normals[hi], up)
+			slopes[hi] = math.acos(normals[hi].y)
+		end
+	end
+	
+	return slopes
+end
+
 --- Applies changes to a heightmap to a Voxel Manipulator data block.
 -- @param	pos1	vector		Position 1 of the defined region
 -- @param	pos2	vector		Position 2 of the defined region

worldeditadditions/utils/vector3.lua

@@ -256,7 +256,8 @@ end
 --- Sorts the components of the given vectors.
 -- pos1 will contain the minimum values, and pos2 the maximum values.
 -- Returns 2 new vectors.
--- Note that the vectors provided do not *have* to be instances of Vector3.
+-- Note that for this specific function
+-- the vectors provided do not *have* to be instances of Vector3.
 -- It is only required that they have the keys x, y, and z.
 -- Vector3 instances are always returned.
 -- This enables convenient ingesting of positions from outside.
@@ -316,8 +317,8 @@ end
 
 --- Returns the mean (average) of 2 positions.
 -- In other words, returns the centre of 2 points.
--- @param	pos1	Vector3	pos1 of the defined region.
+-- @param	pos1	Vector3|number	pos1 of the defined region.
--- @param	pos2	Vector3	pos2 of the defined region.
+-- @param	pos2	Vector3|number	pos2 of the defined region.
 -- @param	target	Vector3	Centre coordinates.
 function Vector3.mean(pos1, pos2)
 	return (pos1 + pos2) / 2
@@ -325,10 +326,16 @@ end
 
 
 --- Returns a vector of the min components of 2 vectors.
--- @param	pos1	Vector3		The first vector to operate on.
+-- @param	pos1	Vector3|number	The first vector to operate on.
--- @param	pos2	Vector3		The second vector to operate on.
+-- @param	pos2	Vector3|number	The second vector to operate on.
 -- @return	Vector3	The minimum values from the input vectors
 function Vector3.min(pos1, pos2)
+	if type(pos1) == "number" then
+		pos1 = Vector3.new(pos1, pos1, pos1)
+	end
+	if type(pos2) == "number" then
+		pos2 = Vector3.new(pos2, pos2, pos2)
+	end
 	return Vector3.new(
 		math.min(pos1.x, pos2.x),
 		math.min(pos1.y, pos2.y),
@@ -341,6 +348,12 @@ end
 -- @param	pos2	Vector3		The second vector to operate on.
 -- @return	Vector3		The maximum values from the input vectors.
 function Vector3.max(pos1, pos2)
+	if type(pos1) == "number" then
+		pos1 = Vector3.new(pos1, pos1, pos1)
+	end
+	if type(pos2) == "number" then
+		pos2 = Vector3.new(pos2, pos2, pos2)
+	end
 	return Vector3.new(
 		math.max(pos1.x, pos2.x),
 		math.max(pos1.y, pos2.y),

worldeditadditions_commands/commands/bonemeal.lua

@@ -6,7 +6,7 @@ local we_c = worldeditadditions_commands
 -- ██   ██ ██    ██ ██  ██ ██ ██      ██  ██  ██ ██      ██   ██ ██
 -- ██████   ██████  ██   ████ ███████ ██      ██ ███████ ██   ██ ███████
 worldedit.register_command("bonemeal", {
-	params = "[<strength> [<chance>]]",
+	params = "[<strength> [<chance> [<node_name> [<node_name> ...]]]]",
 	description = "Bonemeals everything that's bonemeal-able that has an air node directly above it. Optionally takes a strength value to use (default: 1, maximum: 4), and a chance to actually bonemeal an eligible node (positive integer; nodes have a 1-in-<chance> chance to be bonemealed; higher values mean a lower chance; default: 1 - 100% chance).",
 	privs = { worldedit = true },
 	require_pos = 2,
@@ -19,15 +19,16 @@ worldedit.register_command("bonemeal", {
 		
 		local strength = 1
 		local chance = 1
+		local node_names = {} -- An empty table means all nodes
 		
 		if #parts >= 1 then
-			strength = tonumber(parts[1])
+			strength = tonumber(table.remove(parts, 1))
 			if not strength then
 				return false, "Invalid strength value (value must be an integer)"
 			end
 		end
 		if #parts >= 2 then
-			chance = worldeditadditions.parse.chance(parts[2])
+			chance = worldeditadditions.parse.chance(table.remove(parts, 1))
 			if not chance then
 				return false, "Invalid chance value (must be a positive integer)"
 			end
@@ -37,21 +38,33 @@ worldedit.register_command("bonemeal", {
 			return false, "Error: strength value out of bounds (value must be an integer between 1 and 4 inclusive)"
 		end
 		
+		
+		if #parts > 0 then
+			for _,nodename in pairs(parts) do
+				local normalised = worldedit.normalize_nodename(nodename)
+				if not normalised then return false, "Error: Unknown node name '"..nodename.."'." end
+				table.insert(node_names, normalised)
+			end
+		end
+		
 		-- We unconditionally math.floor here because when we tried to test for it directly it was unreliable
-		return true, math.floor(strength), math.floor(chance)
+		return true, math.floor(strength), math.floor(chance), node_names
 	end,
 	nodes_needed = function(name) -- strength, chance
 		-- Since every node has to have an air block, in the best-case scenario
 		-- edit only half the nodes in the selected area
 		return worldedit.volume(worldedit.pos1[name], worldedit.pos2[name]) / 2
 	end,
-	func = function(name, strength, chance)
+	func = function(name, strength, chance, node_names)
 		local start_time = worldeditadditions.get_ms_time()
-		local success, nodes_bonemealed, candidates = worldeditadditions.bonemeal(worldedit.pos1[name], worldedit.pos2[name], strength, chance)
+		local success, nodes_bonemealed, candidates = worldeditadditions.bonemeal(
-		if not success then
+			worldedit.pos1[name], worldedit.pos2[name],
-			-- nodes_bonemealed is an error message here because success == false
+			strength, chance,
-			return success, nodes_bonemealed
+			node_names
-		end
+		)
+		-- nodes_bonemealed is an error message here if success == false
+		if not success then return success, nodes_bonemealed end
+		
 		local percentage = worldeditadditions.round((nodes_bonemealed / candidates)*100, 2)
 		local time_taken = worldeditadditions.get_ms_time() - start_time
 		-- Avoid nan% - since if there aren't any candidates then nodes_bonemealed will be 0 too

worldeditadditions_commands/commands/layers.lua

@@ -1,11 +1,34 @@
+local function parse_slope_range(text)
+	if string.match(text, "%.%.") then
+		-- It's in the form a..b
+		local parts = worldeditadditions.split(text, "..", true)
+		if not parts then return nil end
+		if #parts ~= 2 then return false, "Error: Exactly 2 numbers may be separated by a double dot '..' (e.g. 10..45)" end
+		local min_slope = tonumber(parts[1])
+		local max_slope = tonumber(parts[2])
+		if not min_slope then return false, "Error: Failed to parse the specified min_slope '"..tostring(min_slope).."' value as a number." end
+		if not max_slope then return false, "Error: Failed to parse the specified max_slope '"..tostring(max_slope).."' value as a number." end
+		
+		-- math.rad converts degrees to radians
+		return true, math.rad(min_slope), math.rad(max_slope)
+	else
+		-- It's a single value
+		local max_slope = tonumber(text)
+		if not max_slope then return nil end
+		
+		return true, 0, math.rad(max_slope)
+	end
+end
+
+
 --  ██████  ██    ██ ███████ ██████  ██       █████  ██    ██
 -- ██    ██ ██    ██ ██      ██   ██ ██      ██   ██  ██  ██
 -- ██    ██ ██    ██ █████   ██████  ██      ███████   ████
 -- ██    ██  ██  ██  ██      ██   ██ ██      ██   ██    ██
 --  ██████    ████   ███████ ██   ██ ███████ ██   ██    ██
 worldedit.register_command("layers", {
-	params = "[<node_name_1> [<layer_count_1>]] [<node_name_2> [<layer_count_2>]] ...",
+	params = "[<max_slope|min_slope..max_slope>] [<node_name_1> [<layer_count_1>]] [<node_name_2> [<layer_count_2>]] ...",
-	description = "Replaces the topmost non-airlike nodes with layers of the given nodes from top to bottom. Like WorldEdit for MC's //naturalize command. Default: dirt_with_grass dirt 3",
+	description = "Replaces the topmost non-airlike nodes with layers of the given nodes from top to bottom. Like WorldEdit for MC's //naturalize command. Optionally takes a maximum or minimum and maximum slope value. If a column's slope value falls outside the defined range, then it's skipped. Default: dirt_with_grass dirt 3",
 	privs = { worldedit = true },
 	require_pos = 2,
 	parse = function(params_text)
@@ -13,21 +36,42 @@ worldedit.register_command("layers", {
 			params_text = "dirt_with_grass dirt 3"
 		end
 		
-		local success, node_list = worldeditadditions.parse.weighted_nodes(
+		local parts = worldeditadditions.split_shell(params_text)
-			worldeditadditions.split_shell(params_text),
+		local success, min_slope, max_slope
+		
+		if #parts > 0 then
+			success, min_slope, max_slope = parse_slope_range(parts[1])
+			if success then
+				table.remove(parts, 1) -- Automatically shifts other values down
+			end
+		end
+		
+		if not min_slope then min_slope = 0		end
+		if not max_slope then max_slope = 180	end
+		
+		local node_list
+		success, node_list = worldeditadditions.parse.weighted_nodes(
+			parts,
 			true
 		)
-		return success, node_list
+		return success, node_list, min_slope, max_slope
 	end,
 	nodes_needed = function(name)
 		return worldedit.volume(worldedit.pos1[name], worldedit.pos2[name])
 	end,
-	func = function(name, node_list)
+	func = function(name, node_list, min_slope, max_slope)
 		local start_time = worldeditadditions.get_ms_time()
-		local changes = worldeditadditions.layers(worldedit.pos1[name], worldedit.pos2[name], node_list)
+		local changes = worldeditadditions.layers(
+			worldedit.pos1[name], worldedit.pos2[name],
+			node_list,
+			min_slope, max_slope
+		)
 		local time_taken = worldeditadditions.get_ms_time() - start_time
 		
-		minetest.log("action", name .. " used //layers at " .. worldeditadditions.vector.tostring(worldedit.pos1[name]) .. ", replacing " .. changes.replaced .. " nodes and skipping " .. changes.skipped_columns .. " columns in " .. time_taken .. "s")
+		print("DEBUG min_slope", min_slope, "max_slope", max_slope)
-		return true, changes.replaced .. " nodes replaced and " .. changes.skipped_columns .. " columns skipped in " .. worldeditadditions.format.human_time(time_taken)
+		print("DEBUG min_slope", math.deg(min_slope), "max_slope", math.deg(max_slope))
+		
+		minetest.log("action", name .. " used //layers at " .. worldeditadditions.vector.tostring(worldedit.pos1[name]) .. ", replacing " .. changes.replaced .. " nodes and skipping " .. changes.skipped_columns .. " columns ("..changes.skipped_columns_slope.." due to slope constraints) in " .. time_taken .. "s")
+		return true, changes.replaced .. " nodes replaced and " .. changes.skipped_columns .. " columns skipped ("..changes.skipped_columns_slope.." due to slope constraints) in " .. worldeditadditions.format.human_time(time_taken)
 	end
 })

worldeditadditions_commands/commands/walls.lua

@@ -4,28 +4,48 @@
 -- ██ ███ ██ ██   ██ ██      ██           ██
 --  ███ ███  ██   ██ ███████ ███████ ███████
 worldedit.register_command("walls", {
-	params = "<replace_node>",
+	params = "<replace_node> [<thickness=1>]",
-	description = "Creates vertical walls of <replace_node> around the inside edges of the defined region.",
+	description = "Creates vertical walls of <replace_node> around the inside edges of the defined region. Optionally specifies a thickness for the walls to be created (defaults to 1)",
 	privs = { worldedit = true },
 	require_pos = 2,
 	parse = function(params_text)
-		local target_node = worldedit.normalize_nodename(params_text)
+		local parts = worldeditadditions.split_shell(params_text)
+		
+		local target_node
+		local thickness = 1
+		
+		local target_node_raw = table.remove(parts, 1)
+		target_node = worldedit.normalize_nodename(target_node_raw)
 		if not target_node then
-			return false, "Error: Invalid node name"
+			return false, "Error: Invalid node name '"..target_node_raw.."'."
 		end
-		return true, target_node
+		
+		if #parts > 0 then
+			local thickness_raw = table.remove(parts, 1)
+			thickness = tonumber(thickness_raw)
+			if not thickness then return false, "Error: Invalid thickness value '"..thickness_raw.."'. The thickness value must be a positive integer greater than or equal to 0." end
+			if thickness < 1 then return false, "Error: That thickness value '"..thickness_raw.."' is out of range. The thickness value must be a positive integer greater than or equal to 0." end
+		end
+		
+		return true, target_node, math.floor(thickness)
 	end,
-	nodes_needed = function(name)
+	nodes_needed = function(name, target_node, thickness)
 		-- //overlay only modifies up to 1 node per column in the selected region
 		local pos1, pos2 = worldedit.sort_pos(worldedit.pos1[name], worldedit.pos2[name])
 		
-		local pos3 = { x = pos2.x - 2, z = pos2.z - 2, y = pos2.y }
+		local pos3 = {
+			x = pos2.x - thickness*2,
+			z = pos2.z - thickness*2,
+			y = pos2.y }
 		
 		return worldedit.volume(pos1, pos2) - worldedit.volume(pos1, pos3)
 	end,
-	func = function(name, target_node)
+	func = function(name, target_node, thickness)
 		local start_time = worldeditadditions.get_ms_time()
-		local success, replaced = worldeditadditions.walls(worldedit.pos1[name], worldedit.pos2[name], target_node)
+		local success, replaced = worldeditadditions.walls(
+			worldedit.pos1[name], worldedit.pos2[name],
+			target_node, thickness
+		)
 		local time_taken = worldeditadditions.get_ms_time() - start_time
 		
 		minetest.log("action", name .. " used //walls from "..worldeditadditions.vector.tostring(worldedit.pos1[name]).." to "..worldeditadditions.vector.tostring(worldedit.pos1[name])..", replacing " .. replaced .. " nodes in " .. time_taken .. "s")