Add grayscale color palette

README.md

@@ -222,12 +222,11 @@ Note that the colors only serve as a visual aid and
 given the limited palette, is only an estimation
 of the noise values. You can always use the Perlin Value
 Getter for the exact values.
-If you have problems seeing color differences, feel free
-to edit these files in the `textures` directory of this
-mod with an image editor:
+If you have problems seeing color differences, activate
+the grayscale color palette in the mod settings.
 
-* `perlin_explorer_node_palette.png`: High value colors
-* `perlin_explorer_node_palette_low.png`: Low values colors
+The following settings are only used when you want
+to place nodes in a certain area:
 
 * X, Y, Z: Coordinates of the bottom left front corner if you
  want to generate an area manually with “Apply and create”

init.lua

@@ -1,6 +1,11 @@
 -- If true, the Perlin test nodes will support color
 -- (set to false in case of performance problems)
-local COLORIZE_NODES = true
+local colorize_nodes = minetest.settings:get_bool("perlin_explorer_colorize", true)
+
+-- If true, will use the grayscale color palette.
+-- If false, will use the default colors.
+local grayscale_colors = minetest.settings:get_bool("perlin_explorer_grayscale", false)
+
 -- The number of available test node colors is divided by this number.
 -- A number between 1 to 256
 -- * 1 = Full 256 palette.
@@ -265,10 +270,17 @@ minetest.register_on_mods_loaded(function()
 end)
 
 -- Test nodes to generate a map based on a perlin noise
-local paramtype2
-if COLORIZE_NODES then
+local paramtype2, palette
+if colorize_nodes then
 	paramtype2 = "color"
 end
+if grayscale_colors then
+	palette = "perlin_explorer_node_palette_gray.png"
+	palette_low = "perlin_explorer_node_palette_gray_low.png"
+else
+	palette = "perlin_explorer_node_palette.png"
+	palette_low = "perlin_explorer_node_palette_low.png"
+end
 
 minetest.register_node("perlin_explorer:node", {
 	description = S("Perlin Test Node (High Value)"),
@@ -276,7 +288,7 @@ minetest.register_node("perlin_explorer:node", {
 	sunlight_propagates = true,
 	paramtype2 = paramtype2,
 	tiles = {"perlin_explorer_node.png"},
-	palette = "perlin_explorer_node_palette.png",
+	palette = palette,
 	groups = { dig_immediate = 3 },
 	-- Force-drop without metadata to avoid spamming the inventory
 	drop = "perlin_explorer:node",
@@ -287,7 +299,7 @@ minetest.register_node("perlin_explorer:node_low", {
 	sunlight_propagates = true,
 	paramtype2 = paramtype2,
 	tiles = {"perlin_explorer_node_low.png"},
-	palette = "perlin_explorer_node_palette_low.png",
+	palette = palette_low,
 	groups = { dig_immediate = 3 },
 	-- Force-drop without metadata to avoid spamming the inventory
 	drop = "perlin_explorer:node_low",
@@ -302,6 +314,7 @@ minetest.register_node("perlin_explorer:grid", {
 	paramtype2 = paramtype2,
 	tiles = {"perlin_explorer_grid.png"},
 	palette = "perlin_explorer_node_palette.png",
+	palette = palette,
 	groups = { dig_immediate = 3 },
 	drop = "perlin_explorer:grid",
 })
@@ -313,7 +326,7 @@ minetest.register_node("perlin_explorer:grid_low", {
 	paramtype2 = paramtype2,
 	tiles = {"perlin_explorer_grid_low.png"},
 	use_texture_alpha = "clip",
-	palette = "perlin_explorer_node_palette_low.png",
+	palette = palette_low,
 	groups = { dig_immediate = 3 },
 	drop = "perlin_explorer:grid_low",
 })
@@ -332,7 +345,7 @@ minetest.register_node("perlin_explorer:mini", {
 	sunlight_propagates = true,
 	paramtype2 = paramtype2,
 	tiles = {"perlin_explorer_mini.png"},
-	palette = "perlin_explorer_node_palette.png",
+	palette = palette,
 	groups = { dig_immediate = 3 },
 	drop = "perlin_explorer:mini",
 })
@@ -350,7 +363,7 @@ minetest.register_node("perlin_explorer:mini_low", {
 	paramtype2 = paramtype2,
 	tiles = {"perlin_explorer_mini_low.png"},
 	use_texture_alpha = "clip",
-	palette = "perlin_explorer_node_palette_low.png",
+	palette = palette_low,
 	groups = { dig_immediate = 3 },
 	drop = "perlin_explorer:mini_low",
 })

settingtypes.txt

@@ -0,0 +1,7 @@
+# If enabled, generated nodes will be colorized.
+# Disable this if you have performance problems.
+perlin_explorer_colorize_nodes (Colorize nodes) bool true
+
+# If enabled, will use the grayscale color palette for the nodes.
+# If disabled, will use the default colors instead.
+perlin_explorer_grayscale (Use grayscale color palette) bool false