ethereal/flight.lua

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local flight_secs = minetest.settings:get("ethereal.flightpotion_duration") or (5 * 60)
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local timer_check = 5 -- seconds per check
local S = ethereal.intllib
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local is_50 = minetest.has_feature("object_use_texture_alpha")
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local function get_timer(user)
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if not user then return end
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if is_50 then
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local meta = user:get_meta()
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if not meta then return "" end
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return meta:get_string("ethereal:fly_timer") or ""
else
return user:get_attribute("ethereal:fly_timer") or ""
end
end
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local function has_fly(name)
return minetest.get_player_privs(name).fly
end
local function set_timer(user, timer)
if is_50 then
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local meta = user:get_meta() ; if not meta then return end
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meta:set_string("ethereal:fly_timer", timer)
else
user:set_attribute("ethereal:fly_timer", timer)
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end
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end
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local function set_flight(user, set)
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if not user then return end
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local name = user:get_player_name()
local privs = minetest.get_player_privs(name)
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privs.fly = set
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minetest.set_player_privs(name, privs)
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-- when flight removed set timer to temp position
if set ~= true then
set_timer(user, "-99")
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end
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end
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-- after function
local function ethereal_set_flight(user)
local name = user and user:get_player_name() ; if not name then return end
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local timer = tonumber(get_timer(user)) or 0
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-- if timer ran out then remove 'fly' privelage
if timer <= 0 and timer ~= -99 then
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set_flight(user, nil)
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return
end
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local privs = minetest.get_player_privs(name)
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-- have we already applied 'fly' privelage?
if not privs.fly then
set_flight(user, true)
end
-- handle timer
timer = timer - timer_check
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-- show expiration message and play sound
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if timer <= 10 then
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minetest.chat_send_player(name,
minetest.get_color_escape_sequence("#ff5500")
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.. S("Flight timer about to expire!"))
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minetest.sound_play("default_dig_dig_immediate",
{to_player = name, gain = 1.0}, true)
end
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-- set updated timer
set_timer(user, timer)
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-- restart checks
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minetest.after(timer_check, function()
ethereal_set_flight(user)
end)
end
-- on join / leave
minetest.register_on_joinplayer(function(player)
-- wait 2 seconds before doing flight checks on player
minetest.after(2.0, function(player)
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if not player then return end
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-- get player name and timer
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local name = player:get_player_name() ; if not name then return end
local timer = get_timer(player)
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-- if timer is blank and player can already fly then default and return
if timer == "" and has_fly(name) then
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set_timer(player, "-99")
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return
end
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timer = tonumber(timer) or 0
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-- if timer is set to default then return
if timer == -99 then
return
end
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-- if we got this far and player is flying then start countdown check
if has_fly(name) then
minetest.after(timer_check, function()
ethereal_set_flight(player)
end)
end
end, player)
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end)
-- potion item
minetest.register_node("ethereal:flight_potion", {
description = S("Flight Potion"),
drawtype = "plantlike",
tiles = {"ethereal_flight_potion.png"},
inventory_image = "ethereal_flight_potion.png",
wield_image = "ethereal_flight_potion.png",
paramtype = "light",
sunlight_propagates = true,
walkable = false,
selection_box = {
type = "fixed",
fixed = {-0.2, -0.37, -0.2, 0.2, 0.31, 0.2}
},
groups = {dig_immediate = 3},
sounds = default.node_sound_glass_defaults(),
on_use = function(itemstack, user, pointed_thing)
-- get privs
local name = user:get_player_name()
local privs = minetest.get_player_privs(name)
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local timer = get_timer(user)
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if privs.fly then
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local msg = timer
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if timer == "" or timer == "-99" then
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msg = S("unlimited")
end
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minetest.chat_send_player(name,
minetest.get_color_escape_sequence("#ffff00")
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.. S("Flight already granted, @1 seconds left!", msg))
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return
end
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-- set flight timer
set_timer(user, flight_secs)
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-- show time remaining
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minetest.chat_send_player(name,
minetest.get_color_escape_sequence("#1eff00")
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.. S("Flight granted, you have @1 seconds!", flight_secs))
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-- start check
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ethereal_set_flight(user)
-- take item
itemstack:take_item()
-- return empty bottle
local inv = user:get_inventory()
if inv:room_for_item("main", {name = "vessels:glass_bottle"}) then
user:get_inventory():add_item("main", "vessels:glass_bottle")
else
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minetest.add_item(user:get_pos(), {name = "vessels:glass_bottle"})
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end
return itemstack
end
})
-- recipe
minetest.register_craft({
output = "ethereal:flight_potion",
recipe = {
{"ethereal:etherium_dust", "ethereal:etherium_dust", "ethereal:etherium_dust"},
{"ethereal:etherium_dust", "ethereal:fire_dust", "ethereal:etherium_dust"},
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{"ethereal:etherium_dust", "vessels:glass_bottle", "ethereal:etherium_dust"}
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}
})