fix crash

when trying to airbrush unknown nodes or nodes without palettes.

API.md

@@ -28,7 +28,9 @@ minetest.register_node("mymod:colored_node", {
 - "unifieddyes_palette_colorwallmounted.png"
 - or one of the "split" hues palettes (see below).
 
-`groups`: If your node can be colored by punching it with dye, its groups entry must contain the key ud_param2_colorable = 1, among whatever else you'd normally put there. If the node is software-controlled, as might be the case for some mesecons-digilines aware node, then this group key should be omitted.
+`groups`: If your node can be colored by using the airbrush, its groups entry must contain the key ud_param2_colorable = 1, among whatever else you'd normally put there. If the node is software-controlled, as might be the case for some mesecons-digilines aware node, then this group key should be omitted.
+
+If your node if of the kind where you need the split palette, but you need to put the *full color name* into the node name, as opposed to just the hue, then add the keys `ud_color_start` and `ud_color_end` and set them to the positions of the first and last characters of the color name (where 1 is the first character of the mod name at the start of the node name, i.e. "mymod:foo_bar_orange_baz" would have the start set to 15 and the end at 20).
 
 `on_construct`: see below.
 
@@ -115,12 +117,17 @@ This will loop through all of Unified Dyes' color lists, generating one recipe f
 
 `recipe` is the same as in the normal call, except that Unified Dyes will replace all instances of the string "NEUTRAL_NODE" with the item specified in the preceding `neutral_node` field.  Every instance of "MAIN_DYE" will be replaced with a portion of dye, as Unified Dyes' recipe helper works through its color lists (i.e. this field will become whatever dye is needed for each recipe).
 
-`output_prefix` and `output_suffix`, if specified (must use both if at all), will cause the recipe registration to ignore the usual `output` field, and instead set to the output item to `output_prefix` + (hue) + `output_suffix`.  Used for mods that use the split 89-color palette.  `hue` will thus be one of the 12 hues, or "grey", as defined by the split palettes.
+`output_prefix` and `output_suffix`, if specified (must use both if at all), will cause the recipe registration to set to the output item to `output_prefix` + (hue) + `output_suffix` + `output`.  Used for mods that use the split 89-color palette.  `hue` will thus be one of the 12 hues, or "grey", as defined by the split palettes.  In this situation, you can set `output` to your recipe yield (with a leading space) if needed.  For example, if the prefix is "foo:bar", the suffix is "baz", and the output is set to " 3", then the craft helper will generate output item strings of the form "foo:bar_COLOR_baz 3", for each color in the table.
 
 **`unifieddyes.make_colored_itemstack(itemstack, palette, color)`**
 
 Makes a colored itemstack out of the given `itemstack` and `color` (as a dye, e.g. "dye:dark_red_s50"), setting the correct index per the `palette` field, which works as described above for `unifieddyes.getpaletteidx()`.  Said itemstack is returned as a string suitable for use as the output field of a craft recipe, equal in size to the itemstack passed into the function (e.g. if you give it "mymod:colored_node 7", it'll return a stack of 7 colored items).
 
+**`unifieddyes.generate_split_palette_nodes(name, def, drop)`**
+
+Does just what it sounds like - it registers all the nodes that are needed for a given base node (`def`) to be able to use the split palette, each named according to `name`, with the palette hue appended.  If a custom drop is needed, it can be passed along (only a string is allowed here, specifying a single item).  
+
+
 #### Tables
 
 In addition to the above API calls, Unified Dyes provides several useful tables

colors.txt

@@ -1,90 +0,0 @@
-
-
-Full-saturation colors:
------------------------
-
-dark aqua                          0, 84, 42  unifieddyes_dark_aqua.png
-dark blue                          0,  0, 84  unifieddyes_dark_blue.png
-dark cyan                          0, 84, 83  unifieddyes_dark_cyan.png
-dark green                         0, 84,  0  unifieddyes_dark_green.png
-dark lime                         43, 84,  0  unifieddyes_dark_lime.png
-dark magenta                      84,  0, 83  unifieddyes_dark_magenta.png
-dark orange                       84, 42,  0  unifieddyes_dark_orange.png
-dark red                          84,  0,  0  unifieddyes_dark_red.png
-dark redviolet                    84,  0, 42  unifieddyes_dark_redviolet.png
-dark skyblue                       0, 42, 84  unifieddyes_dark_skyblue.png
-dark violet                       43,  0, 84  unifieddyes_dark_violet.png
-dark yellow                       84, 83,  0  unifieddyes_dark_yellow.png
-medium aqua                        0,169, 84  unifieddyes_medium_aqua.png
-medium blue                        0,  0,169  unifieddyes_medium_blue.png
-medium cyan                        0,169,167  unifieddyes_medium_cyan.png
-medium green                       0,169,  0  unifieddyes_medium_green.png
-medium lime                       87,169,  0  unifieddyes_medium_lime.png
-medium magenta                   169,  0,167  unifieddyes_medium_magenta.png
-medium orange                    169, 84,  0  unifieddyes_medium_orange.png
-medium red                       168,  0,  0  unifieddyes_medium_red.png
-medium redviolet                 169,  0, 84  unifieddyes_medium_redviolet.png
-medium skyblue                     0, 84,169  unifieddyes_medium_skyblue.png
-medium violet                     87,  0,169  unifieddyes_medium_violet.png
-medium yellow                    169,167,  0  unifieddyes_medium_yellow.png
-aqua                               1,255,127  unifieddyes_aqua.png
-blue                               1,  1,255  unifieddyes_blue.png
-cyan                               1,255,252  unifieddyes_cyan.png
-green                              1,255,  1  unifieddyes_green.png
-lime                             132,255,  1  unifieddyes_lime.png
-magenta                          255,  1,252  unifieddyes_magenta.png
-orange                           255,127,  1  unifieddyes_orange.png
-red                              255,  0,  0  unifieddyes_red.png
-redviolet                        255,  1,127  unifieddyes_redviolet.png
-skyblue                            1,127,255  unifieddyes_skyblue.png
-violet                           132,  1,255  unifieddyes_violet.png
-yellow                           255,252,  1  unifieddyes_yellow.png
-
-Low-saturation colors:
-----------------------
-
-dark aqua 50% saturation          21, 63, 42  unifieddyes_dark_aqua_s50.png
-dark blue 50% saturation          21, 21, 63  unifieddyes_dark_blue_s50.png
-dark cyan 50% saturation          21, 63, 63  unifieddyes_dark_cyan_s50.png
-dark green 50% saturation         21, 63, 21  unifieddyes_dark_green_s50.png
-dark lime 50% saturation          43, 63, 21  unifieddyes_dark_lime_s50.png
-dark magenta 50% saturation       63, 21, 63  unifieddyes_dark_magenta_s50.png
-dark orange 50% saturation        63, 42, 21  unifieddyes_dark_orange_s50.png
-dark red 50% saturation           63, 21, 21  unifieddyes_dark_red_s50.png
-dark redviolet 50% saturation     63, 21, 42  unifieddyes_dark_redviolet_s50.png
-dark skyblue 50% saturation       21, 42, 63  unifieddyes_dark_skyblue_s50.png
-dark violet 50% saturation        43, 21, 63  unifieddyes_dark_violet_s50.png
-dark yellow 50% saturation        63, 63, 21  unifieddyes_dark_yellow_s50.png
-medium aqua 50% saturation        42,126, 84  unifieddyes_medium_aqua_s50.png
-medium blue 50% saturation        42, 42,126  unifieddyes_medium_blue_s50.png
-medium cyan 50% saturation        42,126,126  unifieddyes_medium_cyan_s50.png
-medium green 50% saturation       42,126, 42  unifieddyes_medium_green_s50.png
-medium lime 50% saturation        86,126, 42  unifieddyes_medium_lime_s50.png
-medium magenta 50% saturation    126, 42,126  unifieddyes_medium_magenta_s50.png
-medium orange 50% saturation     126, 84, 42  unifieddyes_medium_orange_s50.png
-medium red 50% saturation        127, 42, 42  unifieddyes_medium_red_s50.png
-medium redviolet 50% saturation  126, 42, 84  unifieddyes_medium_redviolet_s50.png
-medium skyblue 50% saturation     42, 84,126  unifieddyes_medium_skyblue_s50.png
-medium violet 50% saturation      86, 42,126  unifieddyes_medium_violet_s50.png
-medium yellow 50% saturation     126,126, 42  unifieddyes_medium_yellow_s50.png
-aqua 50% saturation               65,191,127  unifieddyes_aqua_s50.png
-blue 50% saturation               65, 65,191  unifieddyes_blue_s50.png
-cyan 50% saturation               65,191,190  unifieddyes_cyan_s50.png
-green 50% saturation              65,191, 65  unifieddyes_green_s50.png
-lime 50% saturation              130,191, 65  unifieddyes_lime_s50.png
-magenta 50% saturation           191, 65,190  unifieddyes_magenta_s50.png
-orange 50% saturation            191,127, 65  unifieddyes_orange_s50.png
-red 50% saturation               192, 64, 64  unifieddyes_red_s50.png
-redviolet 50% saturation         191, 65,127  unifieddyes_redviolet_s50.png
-skyblue 50% saturation            65,127,191  unifieddyes_skyblue_s50.png
-violet 50% saturation            130, 65,191  unifieddyes_violet_s50.png
-yellow 50% saturation            191,190, 65  unifieddyes_yellow_s50.png
-
-Greyscale:
-----------
-
-black                              0,  0,  0  unifieddyes_black.png
-dark grey                         64, 64, 64  unifieddyes_darkgrey_paint.png
-medium grey                      128,128,128  unifieddyes_grey_paint.png
-light grey                       192,192,192  unifieddyes_lightgrey_paint.png
-white                            255,255,255  unifieddyes_white_paint.png

init.lua

@@ -41,23 +41,6 @@ else
 	S = function(s) return s end
 end
 
--- helper functions for other mods that use this one
-
-unifieddyes.HUES = {
-	"red",
-	"orange",
-	"yellow",
-	"lime",
-	"green",
-	"aqua",
-	"cyan",
-	"skyblue",
-	"blue",
-	"violet",
-	"magenta",
-	"redviolet"
-}
-
 -- the names of the various colors here came from http://www.procato.com/rgb+index/
 
 unifieddyes.HUES_EXTENDED = {
@@ -87,6 +70,13 @@ unifieddyes.HUES_EXTENDED = {
 	{ "crimson",    0xff, 0x00, 0x40 }
 }
 
+unifieddyes.HUES_WITH_GREY = {}
+
+for _,i in ipairs(unifieddyes.HUES_EXTENDED) do
+	table.insert(unifieddyes.HUES_WITH_GREY, i[1])
+end
+table.insert(unifieddyes.HUES_WITH_GREY, "grey")
+
 unifieddyes.HUES_WALLMOUNTED = {
 	"red",
 	"orange",
@@ -109,6 +99,14 @@ unifieddyes.VALS = {
 	"dark_"
 }
 
+unifieddyes.VALS_SPLIT = {
+	"faint_",
+	"light_",
+	"",
+	"medium_",
+	"dark_"
+}
+
 unifieddyes.VALS_EXTENDED = {
 	"faint_",
 	"pastel_",
@@ -155,6 +153,9 @@ local default_dyes = {
 
 unifieddyes.player_current_dye = {}
 unifieddyes.player_selected_dye = {}
+unifieddyes.player_last_right_clicked = {}
+unifieddyes.palette_has_color = {}
+unifieddyes.player_showall = {}
 
 -- if a node with a palette is placed in the world,
 -- but the itemstack used to place it has no palette_index (color byte),
@@ -171,20 +172,25 @@ minetest.register_on_placenode(
 		end
 
 		if not string.find(itemstack:to_string(), "palette_index") then
-			local param2 = 0
+			local param2
 			local color = 0
 
-			if def.palette == "unifieddyes_palette_extended.png" then
+			if def.palette == "unifieddyes_palette_extended.png"
+			  and def.paramtype2 == "color" then
 				param2 = 240
 				color = 240
-			elseif def.palette == "unifieddyes_palette_colorwallmounted.png" then
+			elseif def.palette == "unifieddyes_palette_colorwallmounted.png"
+			  and def.paramtype2 == "colorwallmounted" then
 				param2 = newnode.param2 % 8
-			elseif def.palette ~= "unifieddyes_palette.png" then -- it's a split palette
+			elseif string.find(def.palette, "unifieddyes_palette_")
+			  and def.paramtype2 == "colorfacedir" then -- it's a split palette
 				param2 = newnode.param2 % 32
 			end
 
-			minetest.swap_node(pos, {name = newnode.name, param2 = param2})
-			minetest.get_meta(pos):set_int("palette_index", color)
+			if param2 then
+				minetest.swap_node(pos, {name = newnode.name, param2 = param2})
+				minetest.get_meta(pos):set_int("palette_index", color)
+			end
 		end
 	end
 )
@@ -198,6 +204,35 @@ end
 function unifieddyes.after_dig_node(foo)
 end
 
+-- This helper function creates multiple copies of the passed node,
+-- for the split palette - one per hue, plus grey - and assigns
+-- proper palettes and other attributes
+
+function unifieddyes.generate_split_palette_nodes(name, def, drop)
+	for _, color in ipairs(unifieddyes.HUES_WITH_GREY) do
+		local def2 = table.copy(def)
+		local desc_color = string.gsub(string.upper(string.sub(color, 1, 1))..string.sub(color, 2), "_", " ")
+		if string.sub(def2.description, -1) == ")" then
+			def2.description = string.sub(def2.description, 1, -2)..", "..desc_color.." shades)"
+		else
+			def2.description = def2.description.."("..desc_color.." shades)"
+		end
+		def2.palette = "unifieddyes_palette_"..color.."s.png"
+		def2.paramtype2 = "colorfacedir"
+		def2.groups.ud_param2_colorable = 1
+
+		if drop then
+			def2.drop = {
+				items = {
+					{items = {drop.."_"..color}, inherit_color = true },
+				}
+			}
+		end
+
+		minetest.register_node(":"..name.."_"..color, def2)
+	end
+end
+
 -- This helper function creates a colored itemstack
 
 function unifieddyes.make_colored_itemstack(item, palette, color)
@@ -207,24 +242,17 @@ function unifieddyes.make_colored_itemstack(item, palette, color)
 	return stack:to_string(),paletteidx
 end
 
--- if your node was once 89-color and uses an LBM to convert to the 256-color palette,
--- call this in that node def's on_construct:
-
-function unifieddyes.on_construct(pos)
-	local meta = minetest.get_meta(pos)
-	meta:set_string("palette", "ext")
-end
-
 -- these helper functions register all of the recipes needed to create colored
 -- nodes with any of the dyes supported by that node's palette.
 
-local function register_c(craft, hue, sat, val)
+local function register_c(craft, h, sat, val)
+	local hue = (type(h) == "table") and h[1] or h
 	local color = ""
 	if val then
-		if craft.palette ~= "extended" then
+		if craft.palette == "wallmounted" then
 			color = val..hue..sat
 		else
-			color = val..hue[1]..sat
+			color = val..hue..sat
 		end
 	else
 		color = hue -- if val is nil, then it's grey.
@@ -236,18 +264,19 @@ local function register_c(craft, hue, sat, val)
 	recipe = string.gsub(recipe, "NEUTRAL_NODE", craft.neutral_node)
 	local newrecipe = minetest.deserialize(recipe)
 
-	local output = craft.output
+	local coutput = craft.output or ""
+	local output = coutput
 	if craft.output_prefix then
-		if craft.palette ~= true then
-			output = craft.output_prefix..color..craft.output_suffix
+		if craft.palette ~= "split" then
+			output = craft.output_prefix..color..craft.output_suffix..coutput
 		else
 			if hue == "white" or hue == "black" or string.find(hue, "grey") then
-				output = craft.output_prefix.."grey"..craft.output_suffix
+				output = craft.output_prefix.."grey"..craft.output_suffix..coutput
 			elseif hue == "pink" then
 				dye = "dye:light_red"
-				output = craft.output_prefix.."red"..craft.output_suffix
+				output = craft.output_prefix.."red"..craft.output_suffix..coutput
 			else
-				output = craft.output_prefix..hue..craft.output_suffix
+				output = craft.output_prefix..hue..craft.output_suffix..coutput
 			end
 		end
 	end
@@ -264,19 +293,18 @@ local function register_c(craft, hue, sat, val)
 end
 
 function unifieddyes.register_color_craft(craft)
-	local hues_table = unifieddyes.HUES
+	local hues_table = unifieddyes.HUES_EXTENDED
 	local sats_table = unifieddyes.SATS
-	local vals_table = unifieddyes.VALS
+	local vals_table = unifieddyes.VALS_SPLIT
 	local greys_table = unifieddyes.GREYS
 
 	if craft.palette == "wallmounted" then
 		register_c(craft, "green", "", "light_")
-		register_c(craft, "azure", "", "")
+		register_c(craft, "blue", "", "light_")
 		hues_table = unifieddyes.HUES_WALLMOUNTED
 		sats_table = {""}
 		vals_table = unifieddyes.VALS
 	elseif craft.palette == "extended" then
-		hues_table = unifieddyes.HUES_EXTENDED
 		vals_table = unifieddyes.VALS_EXTENDED
 		greys_table = unifieddyes.GREYS_EXTENDED
 	end
@@ -361,10 +389,10 @@ end
 function unifieddyes.get_hsv(name) -- expects a node/item name
 	local hue = ""
 	local a,b
-	for _, i in ipairs(unifieddyes.HUES) do
-		a,b = string.find(name, "_"..i)
-		if a and not ( string.find(name, "_redviolet") and i == "red" ) then
-			hue = i
+	for _, i in ipairs(unifieddyes.HUES_EXTENDED) do
+		a,b = string.find(name, "_"..i[1])
+		if a then
+			hue = i[1]
 			break
 		end
 	end
@@ -394,10 +422,10 @@ end
 -- in the function below, color is just a color string, while
 -- palette_type can be:
 --
--- false/nil = standard 89 color palette
--- true = 89 color palette split into pieces for colorfacedir
--- "wallmounted" = 32-color abridged palette
 -- "extended" = 256 color palette
+-- "split" = 200 color palette split into pieces for colorfacedir
+-- "wallmounted" = 32-color abridged palette
+
 
 function unifieddyes.getpaletteidx(color, palette_type)
 
@@ -446,24 +474,6 @@ function unifieddyes.getpaletteidx(color, palette_type)
 		["black"] = 4,
 	}
 
-	local hues = {
-		["red"] = 1,
-		["orange"] = 2,
-		["yellow"] = 3,
-		["lime"] = 4,
-		["green"] = 5,
-		["aqua"] = 6,
-		["spring"] = 6,
-		["cyan"] = 7,
-		["skyblue"] = 8,
-		["azure"] = 8,
-		["blue"] = 9,
-		["violet"] = 10,
-		["magenta"] = 11,
-		["redviolet"] = 12,
-		["rose"] = 12,
-	}
-
 	local hues_extended = {
 		["red"] = 0,
 		["vermilion"] = 1,
@@ -515,6 +525,17 @@ function unifieddyes.getpaletteidx(color, palette_type)
 		["darks50"] = 7,
 	}
 
+	local shades_split = {
+		["faint"] = 0,
+		[""] = 1,
+		["s50"] = 2,
+		["light"] = 3,
+		["medium"] = 4,
+		["mediums50"] = 5,
+		["dark"] = 6,
+		["darks50"] = 7,
+	}
+
 	local shades_extended = {
 		["faint"] = 0,
 		["pastel"] = 1,
@@ -546,7 +567,7 @@ function unifieddyes.getpaletteidx(color, palette_type)
 		if grayscale_wallmounted[color] then
 			return (grayscale_wallmounted[color] * 8), 0
 		end
-	elseif palette_type == true then
+	elseif palette_type == "split" then
 		if grayscale[color] then
 			return (grayscale[color] * 32), 0
 		end
@@ -554,10 +575,6 @@ function unifieddyes.getpaletteidx(color, palette_type)
 		if grayscale_extended[color] then
 			return grayscale_extended[color]+240, 0
 		end
-	else
-		if grayscale[color] then
-			return grayscale[color], 0
-		end
 	end
 
 	local shade = "" -- assume full
@@ -589,7 +606,7 @@ function unifieddyes.getpaletteidx(color, palette_type)
 		if color == "green" and shade == "light" then return 48,3
 		elseif color == "brown" then return 17,1
 		elseif color == "pink" then return 56,7
-		elseif color == "azure" then return 40,5
+		elseif color == "blue" and shade == "light" then return 40,5
 		elseif hues_wallmounted[color] and shades_wallmounted[shade] then
 			return (shades_wallmounted[shade] * 64 + hues_wallmounted[color] * 8), hues_wallmounted[color]
 		end
@@ -601,36 +618,14 @@ function unifieddyes.getpaletteidx(color, palette_type)
 			color = "red"
 			shade = "light"
 		end
-		if palette_type == true then -- it's colorfacedir, so "split" 89-color palette
-
-			-- If using this palette, translate new color names back to old.
-
-			if color == "spring" then
-				color = "aqua"
-			elseif color == "azure" then
-				color = "skyblue"
-			elseif color == "rose" then
-				color = "redviolet"
-			end
-
-			if hues[color] and shades[shade] then
-				return (shades[shade] * 32), hues[color]
+		if palette_type == "split" then -- it's colorfacedir
+			if hues_extended[color] and shades_split[shade] then
+				return (shades_split[shade] * 32), hues_extended[color]+1
 			end
 		elseif palette_type == "extended" then
 			if hues_extended[color] and shades_extended[shade] then
 				return (hues_extended[color] + shades_extended[shade]*24), hues_extended[color]
 			end
-		else -- it's the regular 89-color palette, do the same translation if needed
-			if color == "spring" then
-				color = "aqua"
-			elseif color == "azure" then
-				color = "skyblue"
-			elseif color == "rose" then
-				color = "redviolet"
-			end
-			if hues[color] and shades[shade] then
-				return (hues[color] * 8 + shades[shade]), hues[color]
-			end
 		end
 	end
 end
@@ -665,21 +660,29 @@ function unifieddyes.on_airbrush(itemstack, player, pointed_thing)
 		return
 	end
 
-	if not def.palette then
+	if not (def.groups and def.groups.ud_param2_colorable and def.groups.ud_param2_colorable > 0) then
 		minetest.chat_send_player(player_name, "*** That node can't be colored.")
 		return
 	end
 
 	local palette = nil
 	local fdir = 0
-	if def.palette == "unifieddyes_palette_extended.png" then
+	if not def or not def.palette then
+		minetest.chat_send_player(player_name, "*** That node can't be colored -- it's either undefined or has no palette.")
+		return
+	elseif def.palette == "unifieddyes_palette_extended.png" then
 		palette = "extended"
 	elseif def.palette == "unifieddyes_palette_colorwallmounted.png" then
 		palette = "wallmounted"
 		fdir = node.param2 % 8
-	elseif def.palette ~= "unifieddyes_palette.png" then
-		palette = true
+	elseif def.palette ~= "unifieddyes_palette_extended.png"
+	  and def.palette ~= "unifieddyes_palette_colorwallmounted.png"
+	  and string.find(def.palette, "unifieddyes_palette_") then
+		palette = "split"
 		fdir = node.param2 % 32
+	else
+		minetest.chat_send_player(player_name, "*** That node can't be colored -- it has an invalid color mode.")
+		return
 	end
 
 	local idx, hue = unifieddyes.getpaletteidx(painting_with, palette)
@@ -699,29 +702,42 @@ function unifieddyes.on_airbrush(itemstack, player, pointed_thing)
 	end
 
 	local oldidx = node.param2 - fdir
-
 	local name = def.airbrush_replacement_node or node.name
 
-	if palette == true then
-		local s = string.sub(def.palette, 21)
-		local oldcolor = string.sub(s, 1, string.find(s, "s.png")-1)
+	if palette == "split" then
 
 		local modname = string.sub(name, 1, string.find(name, ":")-1)
 		local nodename2 = string.sub(name, string.find(name, ":")+1)
+		local oldcolor = "snozzberry"
+		local newcolor = "razzberry" -- intentionally misspelled ;-)
 
-		local a,b
+		if def.ud_color_start and def.ud_color_end then
+			oldcolor = string.sub(node.name, def.ud_color_start, def.ud_color_end)
+			newcolor = string.sub(painting_with, 5)
+		else
+			if hue ~= 0 then
+				newcolor = unifieddyes.HUES_EXTENDED[hue][1]
+			else
+				newcolor = "grey"
+			end
 
-		local newcolor = "grey"
-		if hue ~= 0 then
-			newcolor = unifieddyes.HUES[hue]
+			if def.airbrush_replacement_node then
+				oldcolor = "grey"
+			else
+				local s = string.sub(def.palette, 21)
+				oldcolor = string.sub(s, 1, string.find(s, "s.png")-1)
+			end
 		end
 
-		local a,b = string.gsub(nodename2, oldcolor, newcolor)
-		name = modname..":"..a
+		name = modname..":"..string.gsub(nodename2, oldcolor, newcolor)
+
+		if not minetest.registered_items[name] then
+			minetest.chat_send_player(player_name, "*** "..string.sub(painting_with, 5).." can't be applied to that node.")
+			return
+		end
 	elseif idx == oldidx then
 		return
 	end
-
 	minetest.swap_node(pos, {name = name, param2 = fdir + idx})
 	if not creative or not creative.is_enabled_for(player_name) then
 		inv:remove_item("main", painting_with)
@@ -764,28 +780,6 @@ function unifieddyes.color_to_name(param2, def)
 			return unifieddyes.VALS_EXTENDED[v]..unifieddyes.HUES_EXTENDED[h+1][1]..unifieddyes.SATS[s]
 		end
 
-	elseif def.palette == "unifieddyes_palette.png" then
-		local color = param2
-		local h = math.floor(color/8)
-		local s = 1
-		local val = ""
-		if color == 1 or color == h or color > 103 or color == 6 or color == 7 then return "white"
-		elseif color == 2 then return "light_grey"
-		elseif color == 3 then return "grey"
-		elseif color == 4 then return "dark_grey"
-		elseif color == 5 then return "black"
-		end
-		local c = color - h*8
-		if c == 2 then s = 2
-		elseif c == 3 then val = "light_"
-		elseif c == 4 then val = "medium_"
-		elseif c == 5 then val = "medium_" s = 2
-		elseif c == 6 then val = "dark_"
-		else val = "dark_" s = 2
-		end
-
-		return val..unifieddyes.HUES[h+1]..unifieddyes.SATS[s]
- 
 	elseif def.palette == "unifieddyes_palette_colorwallmounted.png" then
 		local color = math.floor(param2 / 8)
 		if color == 0 then return "white"
@@ -801,16 +795,16 @@ function unifieddyes.color_to_name(param2, def)
 		local h = color - v * 8
 		return unifieddyes.VALS[v]..unifieddyes.HUES_WALLMOUNTED[h+1]
 
-	elseif string.find(def.palette, "unifieddyes_palette") then -- it's the "split" 89-color palette
+	elseif string.find(def.palette, "unifieddyes_palette") then -- it's the split palette
 		-- palette names in this mode are always "unifieddyes_palette_COLORs.png"
 
 		local s = string.sub(def.palette, 21)
 		local color = string.sub(s, 1, string.find(s, "s.png")-1)
 
 		local v = math.floor(param2/32)
-		if v == 0 then return "white" end
 		if color ~= "grey" then
-			if v == 1 then return color
+			if     v == 0 then return "faint_"..color
+			elseif v == 1 then return color
 			elseif v == 2 then return color.."_s50"
 			elseif v == 3 then return "light_"..color
 			elseif v == 4 then return "medium_"..color
@@ -826,20 +820,107 @@ function unifieddyes.color_to_name(param2, def)
 	end
 end
 
+local hps = 0.6 -- horizontal position scale
+local vps = 1.3 -- vertical position scale
+local vs = 0.1 -- vertical shift/offset
+
+local color_button_size = ";0.75,0.75;"
+local color_square_size = ";0.69,0.69;"
+
+function unifieddyes.make_readable_color(color)
+	local s = string.gsub(color, "_", " ")
+	s = string.gsub(s, "s50", "(low saturation)")
+	return s
+end
+
+function unifieddyes.make_colored_square(hexcolor, colorname, showall, creative, painting_with, nodepalette, hp, v2, selindic, inv, explist)
+
+	local dye = "dye:"..colorname
+
+	local overlay = ""
+	local colorize = minetest.formspec_escape("^[colorize:#"..hexcolor..":255")
+
+	if not creative and inv:contains_item("main", dye) then
+		overlay = "^unifieddyes_onhand_overlay.png"
+	end
+
+	local unavail_overlay = ""
+	if not showall and not unifieddyes.palette_has_color[nodepalette.."_"..colorname]
+		or (explist and not explist[colorname]) then
+		if overlay == "" then
+			unavail_overlay = "^unifieddyes_unavailable_overlay.png"
+		else
+			unavail_overlay = "^unifieddyes_onhand_unavailable_overlay.png"
+		end
+	end
+
+	local tooltip = "tooltip["..colorname..";"..
+					unifieddyes.make_readable_color(colorname)..
+					"\n(dye:"..colorname..")]"
+
+	if dye == painting_with then
+		overlay = "^unifieddyes_select_overlay.png"
+		selindic = "unifieddyes_white_square.png"..colorize..overlay..unavail_overlay.."]"..tooltip
+	end
+
+	local form
+	if unavail_overlay == "" then
+		form = "image_button["..
+					(hp*hps)..","..(v2*vps+vs)..
+					color_button_size..
+					"unifieddyes_white_square.png"..colorize..overlay..unavail_overlay..";"..
+					colorname..";]"..
+					tooltip
+	else
+		form = "image["..
+					(hp*hps)..","..(v2*vps+vs)..
+					color_square_size..
+					"unifieddyes_white_square.png"..colorize..overlay..unavail_overlay.."]"..
+					tooltip
+	end
+
+	return form, selindic
+end
+
 function unifieddyes.show_airbrush_form(player)
 	if not player then return end
+
+	local t = {}
+
 	local player_name = player:get_player_name()
 	local painting_with = unifieddyes.player_selected_dye[player_name] or unifieddyes.player_current_dye[player_name]
 	local creative = creative and creative.is_enabled_for(player_name)
 	local inv = player:get_inventory()
+	local nodepalette = "extended"
+	local showall = unifieddyes.player_showall[player_name]
 
-	local base_form = "size[15,8.5]label[7,-0.25;Select a color:]"
+	t[1] = "size[14.5,8.5]label[7,-0.3;Select a color:]"
 	local selindic = "unifieddyes_select_overlay.png^unifieddyes_question.png]"
 
-	local size="0.75,0.75;"
-	local hps=0.6
-	local vps=1.3
-	local vs=0.3
+	local last_right_click = unifieddyes.player_last_right_clicked[player_name]
+	if last_right_click then
+		if last_right_click.def and last_right_click.def.palette then
+			if last_right_click.def.palette == "unifieddyes_palette_colorwallmounted.png" then
+				nodepalette = "wallmounted"
+			elseif last_right_click.def.palette == "unifieddyes_palette_extended.png" then
+				t[#t+1] = "label[0.5,8.25;(Right-clicked a node that supports all 256 colors, showing them all)]"
+				showall = true
+			elseif last_right_click.def.palette ~= "unifieddyes_palette_extended.png"
+			  and last_right_click.def.palette ~= "unifieddyes_palette_colorwallmounted.png"
+			  and string.find(last_right_click.def.palette, "unifieddyes_palette_") then
+				nodepalette = "split"
+			end
+		end
+	end
+
+	if not last_right_click.def.groups
+	  or not last_right_click.def.groups.ud_param2_colorable
+	  or not last_right_click.def.palette
+	  or not string.find(last_right_click.def.palette, "unifieddyes_palette_") then
+		t[#t+1] = "label[0.5,8.25;(Right-clicked a node not supported by the Airbrush, showing all colors)]"
+	end
+
+	local explist = last_right_click.def.explist
 
 	for v = 0, 6 do
 		local val = unifieddyes.VALS_EXTENDED[v+1]
@@ -849,7 +930,7 @@ function unifieddyes.show_airbrush_form(player)
 
 		for hi, h in ipairs(unifieddyes.HUES_EXTENDED) do
 			local hue = h[1]
-			local hp=hi-0.5
+			local hp=hi-1
 
 			local r = h[2]
 			local g = h[3]
@@ -865,29 +946,10 @@ function unifieddyes.show_airbrush_form(player)
 			local g2 = math.max(math.min(g + (4-v)*factor, 255), 0)
 			local b2 = math.max(math.min(b + (4-v)*factor, 255), 0)
 
-			local color = string.format("%02x", r2)..string.format("%02x", g2)..string.format("%02x", b2)
-			local dye = "dye:"..val..hue..sat
-
-			local overlay = ""
-			local colorize = minetest.formspec_escape("^[colorize:#"..color..":255")
-
-			if not creative and inv:contains_item("main", dye) then
-				overlay = "^unifieddyes_available_overlay.png"
-			end
-
-			if dye == painting_with then
-				overlay = "^unifieddyes_select_overlay.png"
-				selindic = "unifieddyes_white_square.png"..colorize..overlay.."]"..
-							"tooltip["..val..hue..sat..";"..val..hue..sat.."]"
-			end
-
-			base_form = base_form.."image_button["..
-									(hp*hps)..","..(v2*vps+vs)..";"..
-									size..
-									"unifieddyes_white_square.png"..colorize..overlay..";"..
-									val..hue..sat..";]"..
-									"tooltip["..val..hue..sat..";"..val..hue..sat.."]"
-
+			local hexcolor = string.format("%02x", r2)..string.format("%02x", g2)..string.format("%02x", b2)
+			local f
+			f, selindic = unifieddyes.make_colored_square(hexcolor, val..hue..sat, showall, creative, painting_with, nodepalette, hp, v2, selindic, inv, explist)
+			t[#t+1] = f
 		end
 
 		if v > 3 then
@@ -896,7 +958,7 @@ function unifieddyes.show_airbrush_form(player)
 
 			for hi, h in ipairs(unifieddyes.HUES_EXTENDED) do
 				local hue = h[1]
-				local hp=hi-0.5
+				local hp=hi-1
 
 				local r = h[2]
 				local g = h[3]
@@ -917,28 +979,10 @@ function unifieddyes.show_airbrush_form(player)
 				local g3 = math.floor(p+(g2-p)*0.5)
 				local b3 = math.floor(p+(b2-p)*0.5)
 
-				local color = string.format("%02x", r3)..string.format("%02x", g3)..string.format("%02x", b3)
-				local dye = "dye:"..val..hue..sat
-
-				local overlay = ""
-				local colorize = minetest.formspec_escape("^[colorize:#"..color..":255")
-
-				if not creative and inv:contains_item("main", dye) then
-					overlay = "^unifieddyes_available_overlay.png"
-				end
-
-				if dye == painting_with then
-					overlay = "^unifieddyes_select_overlay.png"
-					selindic = "unifieddyes_white_square.png"..colorize..overlay.."]"..
-								"tooltip["..val..hue..sat..";"..val..hue..sat.."]"
-				end
-
-				base_form = base_form.."image_button["..
-										(hp*hps)..","..(v2*vps+vs)..";"..
-										size..
-										"unifieddyes_white_square.png"..colorize..overlay..";"..
-										val..hue..sat..";]"..
-										"tooltip["..val..hue..sat..";"..val..hue..sat.."]"
+				local hexcolor = string.format("%02x", r3)..string.format("%02x", g3)..string.format("%02x", b3)
+				local f
+				f, selindic = unifieddyes.make_colored_square(hexcolor, val..hue..sat, showall, creative, painting_with, nodepalette, hp, v2, selindic, inv, explist)
+				t[#t+1] = f
 			end
 		end
 	end
@@ -946,63 +990,75 @@ function unifieddyes.show_airbrush_form(player)
 	local v2=5
 	for y = 0, 15 do
 
-		local hp=(15-y)+0.5
+		local hp=15-y
 
-		local grey = string.format("%02x", y*17)..string.format("%02x", y*17)..string.format("%02x", y*17)
-		local grey2 = "grey_"..y
+		local hexgrey = string.format("%02x", y*17)..string.format("%02x", y*17)..string.format("%02x", y*17)
+		local grey = "grey_"..y
 
-		if y == 0 then grey2 = "black" 
-		elseif y == 4 then grey2 = "dark_grey"
-		elseif y == 8 then grey2 = "grey"
-		elseif y == 11 then grey2 = "light_grey"
-		elseif y == 15 then grey2 = "white"
+		if y == 0 then grey = "black" 
+		elseif y == 4 then grey = "dark_grey"
+		elseif y == 8 then grey = "grey"
+		elseif y == 11 then grey = "light_grey"
+		elseif y == 15 then grey = "white"
 		end
 
-		local dye = "dye:"..grey2
-
-		local overlay = ""
-		local colorize = minetest.formspec_escape("^[colorize:#"..grey..":255")
-
-		if not creative and inv:contains_item("main", dye) then
-			overlay = "^unifieddyes_available_overlay.png"
-		end
-
-		if dye == painting_with then
-			overlay = "^unifieddyes_select_overlay.png"
-			slindic = "unifieddyes_white_square.png"..colorize..overlay.."]"..
-						"tooltip["..grey2..";"..grey2.."]"
-		end
-
-		base_form = base_form.."image_button["..
-								(hp*hps)..","..(v2*vps+vs)..";"..
-								size..
-								"unifieddyes_white_square.png"..colorize..overlay..";"..
-								grey2..";]tooltip["..grey2..";"..grey2.."]"
+		local f
+		f, selindic = unifieddyes.make_colored_square(hexgrey, grey, showall, creative, painting_with, nodepalette, hp, v2, selindic, inv, explist)
+		t[#t+1] = f
 
 	end
 
 	if not creative then
-		base_form = base_form..
-				"image[10.3,"..(vps*5+vs)..";"..size..
-				"unifieddyes_available_overlay.png]"..
-				"label[11.0,"..(vps*5.1+vs)..";Dyes on hand]"
-	end
-		base_form = base_form..
-				"image[12.5,"..(vps*5+vs)..";"..size..
-				selindic..
-				"label[13.2,"..(vps*5.1+vs)..";Your selection]"
+		t[#t+1] = "image[10,"
+		t[#t+1] = (vps*5.55+vs)
+		t[#t+1] = color_button_size
+		t[#t+1] = "unifieddyes_onhand_overlay.png]label[10.7,"
+		t[#t+1] = (vps*5.51+vs)
+		t[#t+1] = ";Dyes]"
+		t[#t+1] = "label[10.7,"
+		t[#t+1] = (vps*5.67+vs)
+		t[#t+1] = ";on hand]"
 
-	base_form = base_form..
-				"button_exit[11,8;2,1;cancel;Cancel]"..
-				"button_exit[13,8;2,1;accept;Accept]"
+	end
+
+	t[#t+1] = "image[10,"
+	t[#t+1] = (vps*5+vs)
+	t[#t+1] = color_button_size
+	t[#t+1] = selindic
 
 	if painting_with then
-		base_form = base_form..
-					"label[1,"..(7.5+vs)..";Selected dye:  "..
-					painting_with.."]"
+		t[#t+1] = "label[10.7,"
+		t[#t+1] = (vps*4.90+vs)
+		t[#t+1] = ";Your selection:]"
+		t[#t+1] = "label[10.7,"
+		t[#t+1] = (vps*5.07+vs)
+		t[#t+1] = ";"
+		t[#t+1] = unifieddyes.make_readable_color(string.sub(painting_with, 5))
+		t[#t+1] = "]label[10.7,"
+		t[#t+1] = (vps*5.24+vs)
+		t[#t+1] = ";("
+		t[#t+1] = painting_with
+		t[#t+1] = ")]"
+	else
+		t[#t+1] = "label[10.7,"
+		t[#t+1] = (vps*5.07+vs)
+		t[#t+1] = ";Your selection]"
 	end
 
-	minetest.show_formspec(player_name, "unifieddyes:dye_select_form", base_form)
+	t[#t+1] = "button_exit[10.5,8;2,1;cancel;Cancel]button_exit[12.5,8;2,1;accept;Accept]"
+
+
+	if last_right_click and last_right_click.def and nodepalette ~= "extended" then
+		if showall then
+			t[#t+1] = "button[0,8;2,1;show_avail;Show Available]"
+			t[#t+1] = "label[2,8.25;(Currently showing all 256 colors)]"
+		else
+			t[#t+1] = "button[0,8;2,1;show_all;Show All Colors]"
+			t[#t+1] = "label[2,8.25;(Currently only showing what the right-clicked node can use)]"
+		end
+	end
+
+	minetest.show_formspec(player_name, "unifieddyes:dye_select_form", table.concat(t))
 end
 
 minetest.register_tool("unifieddyes:airbrush", {
@@ -1016,15 +1072,21 @@ minetest.register_tool("unifieddyes:airbrush", {
 	on_use = unifieddyes.on_airbrush,
 	on_place = function(itemstack, placer, pointed_thing)
 		local keys = placer:get_player_control()
+		local player_name = placer:get_player_name()
+		local pos = minetest.get_pointed_thing_position(pointed_thing)
+		local node
+		local def
+
+		if pos then node = minetest.get_node(pos) end
+		if node then def = minetest.registered_items[node.name] end
+
+		unifieddyes.player_last_right_clicked[player_name] = {pos = pos, node = node, def = def}
+
 		if not keys.sneak then
 			unifieddyes.show_airbrush_form(placer)
 		elseif keys.sneak then
-			local player_name = placer:get_player_name()
-			local pos = minetest.get_pointed_thing_position(pointed_thing)
-			if not pos then return end
-			local node = minetest.get_node(pos)
-			local def = minetest.registered_items[node.name]
-			if not def then return end
+
+			if not pos or not def then return end
 			local newcolor = unifieddyes.color_to_name(node.param2, def)
 
 			if not newcolor then
@@ -1047,21 +1109,56 @@ minetest.register_craft( {
 })
 
 minetest.register_on_player_receive_fields(function(player, formname, fields)
+
 	if formname == "unifieddyes:dye_select_form" then
+
 		local player_name = player:get_player_name()
-		if fields.quit then
-			if not fields.accept then
-				unifieddyes.player_selected_dye[player_name] = nil
-				return
-			else
+		local nodepalette = "extended"
+		local showall = unifieddyes.player_showall[player_name]
+
+		local last_right_click = unifieddyes.player_last_right_clicked[player_name]
+		if last_right_click and last_right_click.def then
+			if last_right_click.def.palette then
+				if last_right_click.def.palette == "unifieddyes_palette_colorwallmounted.png" then
+					nodepalette = "wallmounted"
+				elseif last_right_click.def.palette ~= "unifieddyes_palette_extended.png" then
+					nodepalette = "split"
+				end
+			end
+		end
+
+		if fields.show_all then 
+			unifieddyes.player_showall[player_name] = true
+			unifieddyes.show_airbrush_form(player)
+			return
+		elseif fields.show_avail then 
+			unifieddyes.player_showall[player_name] = false
+			unifieddyes.show_airbrush_form(player)
+			return
+		elseif fields.quit then
+			if fields.accept then
 				local dye = unifieddyes.player_selected_dye[player_name]
 				if not dye then
 					minetest.chat_send_player(player_name, "*** Clicked \"Accept\", but no color was selected!")
 					return
-				end
-				unifieddyes.player_current_dye[player_name] = dye
-				unifieddyes.player_selected_dye[player_name] = nil
+				elseif not showall
+						and not unifieddyes.palette_has_color[nodepalette.."_"..string.sub(dye, 5)] then
+					minetest.chat_send_player(player_name, "*** Clicked \"Accept\", but the selected color can't be used on the")
+					minetest.chat_send_player(player_name, "*** node that was right-clicked (and \"Show All\" wasn't in effect).")
+					if unifieddyes.player_current_dye[player_name] then
+						minetest.chat_send_player(player_name, "*** Ignoring it and sticking with "..string.sub(unifieddyes.player_current_dye[player_name], 5)..".")
+					else
+						minetest.chat_send_player(player_name, "*** Ignoring it.")
+					end
+					return
+				else
+					unifieddyes.player_current_dye[player_name] = dye
+					unifieddyes.player_selected_dye[player_name] = nil
 					minetest.chat_send_player(player_name, "*** Selected "..string.sub(dye, 5).." for the airbrush.")
+					return
+				end
+			else -- assume "Cancel" or Esc.
+				unifieddyes.player_selected_dye[player_name] = nil
 				return
 			end
 		else
@@ -1071,7 +1168,9 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 			local inv = player:get_inventory()
 			local creative = creative and creative.is_enabled_for(player_name)
 			local dye = "dye:"..s3
-			if minetest.registered_items[dye] and (creative or inv:contains_item("main", dye)) then
+
+			if (showall or unifieddyes.palette_has_color[nodepalette.."_"..s3]) and
+				(minetest.registered_items[dye] and (creative or inv:contains_item("main", dye))) then
 				unifieddyes.player_selected_dye[player_name] = dye 
 				unifieddyes.show_airbrush_form(player)
 			end
@@ -1079,30 +1178,6 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 	end
 end)
 
--- build a table to convert from classic/89-color palette to extended palette
-
--- the first five entries are for the old greyscale - white, light, grey, dark, black
-unifieddyes.convert_classic_palette = {
-	240,
-	244,
-	247,
-	251,
-	253
-}
-
-for hue = 0, 11 do
-	-- light
-	local paletteidx = unifieddyes.getpaletteidx("dye:light_"..unifieddyes.HUES[hue+1], false)
-	unifieddyes.convert_classic_palette[paletteidx] = hue*2 + 48
-	for sat = 0, 1 do
-		for val = 0, 2 do
-			-- all other shades
-			local paletteidx = unifieddyes.getpaletteidx("dye:"..unifieddyes.VALS[val+1]..unifieddyes.HUES[hue+1]..unifieddyes.SATS[sat+1], false)
-			unifieddyes.convert_classic_palette[paletteidx] = hue*2 + sat*24 + (val*48+96)
-		end
-	end
-end
-
 -- Generate all dyes that are not part of the default minetest_game dyes mod
 
 for _, h in ipairs(unifieddyes.HUES_EXTENDED) do
@@ -1145,14 +1220,6 @@ for _, h in ipairs(unifieddyes.HUES_EXTENDED) do
 			end
 		end
 		minetest.register_alias("unifieddyes:"..val..hue, "dye:"..val..hue)
-		if h[1] == "spring" then
-			minetest.register_alias("unifieddyes:"..val.."aqua", "dye:"..val.."spring")
-		elseif h[1] == "azure" then
-			minetest.register_alias("unifieddyes:"..val.."skyblue", "dye:"..val.."azure")
-		elseif h[1] == "rose" then
-			minetest.register_alias("unifieddyes:"..val.."redviolet", "dye:"..val.."rose")
-		end
-
 
 		if v > 3 then -- also register the low-sat version
 
@@ -1173,13 +1240,6 @@ for _, h in ipairs(unifieddyes.HUES_EXTENDED) do
 				groups = { dye=1, not_in_creative_inventory=1 },
 			})
 			minetest.register_alias("unifieddyes:"..val..hue.."_s50", "dye:"..val..hue.."_s50")
-			if h[1] == "spring" then
-				minetest.register_alias("unifieddyes:"..val.."aqua_s50", "dye:"..val.."spring_s50")
-			elseif h[1] == "azure" then
-				minetest.register_alias("unifieddyes:"..val.."skyblue_s50", "dye:"..val.."azure_s50")
-			elseif h[1] == "rose" then
-				minetest.register_alias("unifieddyes:"..val.."redviolet_s50", "dye:"..val.."rose_s50")
-			end
 		end
 	end
 end
@@ -1217,6 +1277,43 @@ minetest.register_craftitem(":dye:light_grey", {
 	groups = { dye=1, not_in_creative_inventory=1 },
 })
 
+-- build a table of color <-> palette associations to reduce the need for
+-- realtime lookups with getpaletteidx()
+
+for _, palette in ipairs({"extended", "split", "wallmounted"}) do
+	local palette2 = palette
+
+	for i in ipairs(unifieddyes.SATS) do
+		local sat = (palette == "wallmounted") and "" or unifieddyes.SATS[i]
+		for _, hue in ipairs(unifieddyes.HUES_EXTENDED) do
+			for _, val in ipairs(unifieddyes.VALS_EXTENDED) do
+				local color = val..hue[1]..sat
+				if unifieddyes.getpaletteidx("dye:"..color, palette2) then
+					unifieddyes.palette_has_color[palette.."_"..color] = true
+				end
+			end
+		end
+	end
+
+	for y = 0, 15 do
+		local grey = "grey_"..y
+
+		if y == 0 then grey = "black" 
+		elseif y == 4 then grey = "dark_grey"
+		elseif y == 8 then grey = "grey"
+		elseif y == 11 then grey = "light_grey"
+		elseif y == 15 then grey = "white"
+		end
+		if unifieddyes.getpaletteidx("dye:"..grey, palette2) then
+			unifieddyes.palette_has_color[palette.."_"..grey] = true
+		end
+	end
+end
+
+unifieddyes.palette_has_color["wallmounted_light_red"] = true
+
+-- crafting!
+
 unifieddyes.base_color_crafts = {
 	{ "red",		"flowers:rose",				nil,				nil,			nil,			nil,		4 },
 	{ "vermilion",	"dye:red",					"dye:orange",		nil,			nil,			nil,		3 },