Add settingtypes.txt settings

init.lua

@@ -28,19 +28,26 @@ nether.path           = minetest.get_modpath(nether.modname)
 nether.get_translator = S
 
 -- Settings
-nether.DEPTH                      = -5000
+nether.DEPTH                      = -5000 -- The y location of the Nether
 nether.FASTTRAVEL_FACTOR          =     8 -- 10 could be better value for Minetest, since there's no sprint, but ex-Minecraft players will be mathing for 8
 nether.PORTAL_BOOK_LOOT_WEIGHTING =   0.9 -- Likelyhood of finding the Book of Portals (guide) in dungeon chests. Set to 0 to disable.
-nether.ENABLE_EXAMPLE_PORTALS     = false -- Enables extra portal types - examples of how to create your own portal types using the Nether's portal API. Once enabled, their shapes will be shown in the book of portals.
+nether.NETHER_REALM_ENABLED       =  true -- Setting to false disables the Nether and Nether portal
+
+
+-- Override default settings with values from the .conf file, if any are present.
+nether.FASTTRAVEL_FACTOR          = tonumber(minetest.settings:get("nether_fasttravel_factor") or nether.FASTTRAVEL_FACTOR)
+nether.PORTAL_BOOK_LOOT_WEIGHTING = tonumber(minetest.settings:get("nether_portalBook_loot_weighting") or nether.PORTAL_BOOK_LOOT_WEIGHTING)
+nether.NETHER_REALM_ENABLED       = minetest.settings:get_bool("nether_realm_enabled", nether.NETHER_REALM_ENABLED)
+
 
 -- Load files
 dofile(nether.path .. "/portal_api.lua")
 dofile(nether.path .. "/nodes.lua")
+if nether.NETHER_REALM_ENABLED then
 	dofile(nether.path .. "/mapgen.lua")
-
-if nether.ENABLE_EXAMPLE_PORTALS then
-	dofile(nether.path .. "/portal_examples.lua")
 end
+dofile(nether.path .. "/portal_examples.lua")
+
 
 -- Portals are ignited by right-clicking with a mese crystal fragment
 nether.register_portal_ignition_item(
@@ -49,6 +56,7 @@ nether.register_portal_ignition_item(
 )
 
 
+if nether.NETHER_REALM_ENABLED then
 	-- Use the Portal API to add a portal type which goes to the Nether
 	-- See portal_api.txt for documentation
 	nether.register_portal("nether_portal", {
@@ -148,3 +156,4 @@ The expedition parties have found no diamonds or gold, and after an experienced
 		end
 		
 	})
+end

portal_examples.lua

@@ -1,10 +1,11 @@
 --[[
-
   Nether mod portal examples for Minetest
 
-  These portal API examples are independent of the Nether. 
-  To use this file, set nether.ENABLE_EXAMPLE_PORTALS to true in init.lua
+  These portal API examples work independently of the Nether realm and Nether portal. 
+  To try these examples, enable them in Mintest -> Settings -> All settings -> Mods -> nether
+  Once enabled, their shapes/plans will be shown in the book of portals.
 
+  --
 
   Copyright (C) 2019 Treer
 
@@ -24,6 +25,10 @@
 ]]--
 local S = nether.get_translator
 
+
+local ENABLE_PORTAL_EXAMPLE_FLOATLANDS    = false
+local ENABLE_PORTAL_EXAMPLE_SURFACETRAVEL = false
+
 -- Sets how far a Surface Portal will travel, measured in cells along the Moore curve,
 -- which are about 117 nodes square each. Larger numbers will generally mean further distance 
 -- as-the-crow-flies, but for small adjustments this will not always be true due to the how 
@@ -33,8 +38,14 @@ local S = nether.get_translator
 local SURFACE_TRAVEL_DISTANCE = 26
 
 
+--=================================================--
+-- Portal to the Floatlands, playable code example --
+--==================================================--
 local FLOATLANDS_ENABLED = false
 local FLOATLAND_LEVEL    = 1280
+
+if  minetest.settings:get_bool("nether_enable_portal_example_floatlands", ENABLE_PORTAL_EXAMPLE_FLOATLANDS) then
+
 	local floatlands_flavortext = ""
 	if minetest.get_mapgen_setting("mg_name") == "v7" then
 		local mgv7_spflags = minetest.get_mapgen_setting("mgv7_spflags")
@@ -91,7 +102,7 @@ This portal is different to the others, rather than acting akin to a doorway it
 			local destination_pos = {x = surface_anchorPos.x ,y = FLOATLAND_LEVEL + 2, z = surface_anchorPos.z}
 
 			-- a y_factor of 0 makes the search ignore the altitude of the portals (as long as they are in the Floatlands)
-		local existing_portal_location, existing_portal_orientation = nether.find_nearest_working_portal("floatlands_portal", destination_pos, 20, 0)
+			local existing_portal_location, existing_portal_orientation = nether.find_nearest_working_portal("floatlands_portal", destination_pos, 10, 0)
 			if existing_portal_location ~= nil then
 				return existing_portal_location, existing_portal_orientation
 			else
@@ -100,12 +111,20 @@ This portal is different to the others, rather than acting akin to a doorway it
 		end
 	})
 
+end
+
+
+--==============================================--
+-- Surface-travel portal, playable code example --
+--==============================================--
 
 -- These Moore Curve functions requred by surface_portal's find_surface_anchorPos() will 
 -- be assigned later in this file.
 local get_moore_distance -- will be function get_moore_distance(cell_count, x, y): integer
 local get_moore_coords   -- will be function get_moore_coords(cell_count, distance): pos2d
 
+if  minetest.settings:get_bool("nether_enable_portal_example_surfacetravel", ENABLE_PORTAL_EXAMPLE_SURFACETRAVEL) then
+
 	nether.register_portal("surface_portal", {
 		shape               = nether.PortalShape_Circular,
 		frame_node_name     = "default:tinblock",
@@ -141,7 +160,7 @@ These travel a distance along the ground, and even when constructed deep undergr
 		find_surface_anchorPos = function(realm_anchorPos)
 			-- A portal definition doesn't normally need to provide a find_surface_anchorPos() function,
 			-- since find_surface_target_y() will be used by default, but these portals travel around the
-		-- surface (following a Moore curve) so will be using a different x and z to realm_anchorPos. 
+			-- surface (following a Moore curve) so will be calculating a different x and z to realm_anchorPos. 
 
 			local cellCount = 512
 			local maxDistFromOrigin = 30000 -- the world edges are at X=30927, X=−30912, Z=30927 and Z=−30912
@@ -201,7 +220,7 @@ These travel a distance along the ground, and even when constructed deep undergr
 		end
 	})
 
-
+end
 
 --=========================================--
 -- Hilbert curve and Moore curve functions --
@@ -211,9 +230,9 @@ These travel a distance along the ground, and even when constructed deep undergr
 -- to place portals. https://en.wikipedia.org/wiki/Moore_curve
 
 
--- Flip a quadrant on its diagonal axis
+-- Flip a quadrant on a diagonal axis
 -- cell_count is the number of cells across the square is split into, and must be a power of 2
--- if flip_twice is true then pos does not change (any even numbers of flips would cancel out)
+-- if flip_twice is true then pos does not change (even numbers of flips cancel out)
 -- if flip_direction is true then the position is flipped along the \ diagonal
 -- if flip_direction is false then the position is flipped along the / diagonal
 local function hilbert_flip(cell_count, pos, flip_direction, flip_twice)

settingtypes.txt

@@ -0,0 +1,19 @@
+# Travelling a short distance in the Nether can correspond to a much further distance on the surface.
+#
+# A factor of 10 might be a better value for Minetest, since there's no sprint, but ex-Minecraft players will be mathing for 8.
+nether_fasttravel_factor (Nether fast-travel factor) int 8
+
+# The likelyhood of finding a Book containing all the portal plans in a dungeon chest. 
+# Set to 0 to disable, or 10 to have it extremely common.
+#
+# (This value is automatically halved when the Nether portal is the only type of portal, since few players will need instruction)
+nether_portalBook_loot_weighting (Likelyhood of finding Book of Portals in dungeon chests) int 9
+
+# Turn off to disable the Nether and Nether portal
+nether_realm_enabled (Enable Nether realm & portal) bool true
+
+# Enables the Floatlands portal api code example
+nether_enable_portal_example_floatlands (Enable example portal: Floatlands) bool false
+
+# Enables the Surface travel portal api code example
+nether_enable_portal_example_surfacetravel (Enable example portal: Surface travel) bool false