Add local storage to maintain state.

README.md

@@ -16,6 +16,8 @@ This mod defaults to not applying filter. To enable, use the chat command:
 
 Repeated use of this command will toggle the effect off and on.
 
+**New:** Now with local storage to maintain state of vignette filter between sessions.
+
 Licenses
 --------
 Source code

init.lua

@@ -2,24 +2,40 @@
 -- Adds a vignette filter to player's screen
 -- Based on concept by TriBlade9
 -- By David_G (kestral246@gmail.com)
+-- 2019-03-19
 
 -- Don't enable vignette effect at start.
 -- Use chat command "/vignette" to enable, and then to toggle effect off or on.
+-- Add local storage to maintain state of vignette filter per user.
 
 local vignette = {}
+local storage = minetest.get_mod_storage()
 
 minetest.register_on_joinplayer(function(player)
 	local pname = player:get_player_name()
-	vignette[pname] = {
-		id = player:hud_add({
-			hud_elem_type = "image",
-			text = "",
-			position = {x=0, y=0},
-			scale = {x=-100, y=-100},
-			alignment = {x=1, y=1},
-			offset = {x=0, y=0}
-		}),
-		enable = false }
+	if storage:get(pname) and storage:get(pname) == "1" then  -- enabled
+		vignette[pname] = {
+			id = player:hud_add({
+				hud_elem_type = "image",
+				text = "vignette.png",
+				position = {x=0, y=0},
+				scale = {x=-100, y=-100},
+				alignment = {x=1, y=1},
+				offset = {x=0, y=0}
+			}),
+			enable = true }
+	else  -- not enabled
+		vignette[pname] = {
+			id = player:hud_add({
+				hud_elem_type = "image",
+				text = "",
+				position = {x=0, y=0},
+				scale = {x=-100, y=-100},
+				alignment = {x=1, y=1},
+				offset = {x=0, y=0}
+			}),
+			enable = false }
+	end
 end)
 
 minetest.register_chatcommand("vignette", {
@@ -31,9 +47,11 @@ minetest.register_chatcommand("vignette", {
 		if vignette[name].enable == true then
 			player:hud_change(vignette[name].id, "text", "")
 			vignette[name].enable = false
+			storage:set_string(name, "0")
 		else
 			player:hud_change(vignette[name].id, "text", "vignette.png")
 			vignette[name].enable = true
+			storage:set_string(name, "1")
 		end
 	end,
 })