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init.lua
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init.lua
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-- pull some often used (and unlikely to be overriden)
-- functions to local scope
local math_abs = math.abs
local math_cos = math.cos
local math_floor = math.floor
local math_max = math.max
local math_min = math.min
local math_pi = math.pi
local math_pi2 = 2 * math_pi
local math_sin = math.sin
local math_sqrt = math.sqrt
local vector_multiply = vector.multiply
local vector_new = vector.new
local vector_zero = vector.zero
-- global table for exposed functions
deltaglider = {
version = 20240422.025720,
translator = minetest.get_translator('deltaglider'),
}
local S = deltaglider.translator
local has_areas = minetest.get_modpath("areas")
local has_hangglider = minetest.get_modpath("hangglider")
local has_player_monoids = minetest.get_modpath("player_monoids")
local has_priv_protector = minetest.get_modpath("priv_protector")
and minetest.global_exists("priv_protector")
and priv_protector.get_area_priv
local has_tnt = minetest.get_modpath("tnt")
or minetest.get_modpath("mcl_mobitems")
local has_xp_redo = minetest.get_modpath("xp_redo")
and minetest.global_exists("xp_redo")
and xp_redo.get_area_xp_limits and xp_redo.get_xp
local enable_flak = has_areas and minetest.settings:get_bool(
"deltaglider.enable_flak", true)
local flak_warning_time = tonumber(minetest.settings:get(
"deltaglider.flak_warning_time")) or 2
local glider_uses = tonumber(minetest.settings:get(
"deltaglider.uses")) or 250
local crash_damage_wear_factor = tonumber(
minetest.settings:get("deltaglider.crash_damage_wear_factor"))
or 2457.5625
local max_speed = math_max(2, math_min(65535, tonumber(
minetest.settings:get("deltaglider.max_speed")) or 30))
local mouse_controls = minetest.settings:get_bool(
"deltaglider.mouse_controls", true)
local keyboard_controls = minetest.settings:get_bool(
"deltaglider.keyboard_controls", true)
assert(mouse_controls or keyboard_controls,
"Neither mouse nor keyboard controls enabled.")
local use_rockets = has_tnt and minetest.settings:get_bool(
"deltaglider.use_rockets", true)
local rocket_cooldown = math_min(65000, math_max(1,
tonumber(minetest.settings:get("deltaglider.rocket_cooldown")) or 10))
deltaglider.rocket_cooldown = rocket_cooldown
local glider_wear = 0 < glider_uses and (65535 / glider_uses) or nil
deltaglider.allow_hangglider_while_gliding = minetest.settings:get_bool(
"deltaglider.allow_hangglider_while_gliding", true)
deltaglider.allow_while_hanggliding = minetest.settings:get_bool(
"deltaglider.allow_while_hanggliding", false)
local flak_warning = S("You have entered restricted airspace!@n"
.. "You will be shot down in @1"
.. " seconds by anti-aircraft guns!", flak_warning_time)
-- only register chatcommand if [hangglider] isn't available
if enable_flak and not has_hangglider then
minetest.register_chatcommand("area_flak", {
params = S("<ID>"),
description = S("Toggle airspace restrictions for area <ID>."),
func = function(name, param)
local id = tonumber(param)
if not id then
return false, S("Invalid usage, see /help area_flak.")
end
if not areas:isAreaOwner(id, name) then
return false, S("Area @1 does not exist or"
.. " is not owned by you.", id)
end
local open = not areas.areas[id].flak
-- Save false as nil to avoid inflating the DB.
areas.areas[id].flak = open or nil
areas:save()
return true, S("Area @1 airspace is @2.", id,
open and S("closed") or S("opened"))
end
})
end
minetest.register_chatcommand("deltagliderToggleHUD", {
params = "",
description = S("Toggle delta-glider's HUD."),
func = function(name)
local meta = minetest.get_player_by_name(name):get_meta()
-- think: deltaglider.HUDdisabled
local value = 0 == meta:get_int("deltaglider.HUDd")
meta:set_int("deltaglider.HUDd", value and 1 or 0)
return true
end
})
local function set_physics_overrides(player, overrides)
if has_player_monoids then
for name, value in pairs(overrides) do
player_monoids[name]:add_change(
player, value, "deltaglider:glider")
end
else
player:set_physics_override(overrides)
end
end
local function remove_physics_overrides(player)
if has_player_monoids then
for _, name in pairs({ "jump", "speed", "gravity" }) do
player_monoids[name]:del_change(
player, "deltaglider:glider")
end
else
player:set_physics_override({
jump = 1, speed = 1, gravity = 1
})
end
end
-- NOTE: THIS METHOD IS EXPERIMENTAL, IT'S NAME AND SIGNATURE
-- COULD CHANGE IN FUTURE VERSIONS.
-- Allow other mods to register custom flight checks
-- to disallow flying in certain areas or materials
-- such as on the moon or without priv in certain area
-- The function's signature is: (name, player, luaent)
-- name: (string) player's name
-- player: (PlayerObjRef) the player object
-- luaent: (nil or luaentity) the glider luaentity. When set,
-- player is already flying. When not, player would like to
-- take off.
-- The function *must* return true to indicate that player may
-- *not* fly. A second return value of int may be provided to
-- indicate damage to player from which damage to glider
-- is also applied. Sensible values are from -20 to 20.
-- Negative meaning healing.
local grounded_checks = {}
function deltaglider.register_grounded_check(func)
grounded_checks[#grounded_checks + 1] = func
end
local function custom_grounded_checks(name, player, luaent)
local is_grounded = false
local damage = 0
local i = #grounded_checks
if i == 0 then
return is_grounded, damage
end
local res_bool, res_int
repeat
res_bool, res_int = grounded_checks[i](name, player, luaent)
if res_bool then
is_grounded = true
end
if type(res_int) == "number" then
damage = damage + math_max(-20, math_min(20, res_int))
end
i = i - 1
until i == 0
return is_grounded, damage
end
local function friendly_airspace(pos, name, xp, privs)
if not enable_flak then
return true
end
local flak, open = false, false
local priv_excemption, xp_limit = false, false
local areas_list = areas:getAreasAtPos(pos)
local xp_area, priv_area
local owners = {}
for id, area in pairs(areas_list) do
-- open areas are friendly airspace(?)
if area.open then
open = true
end
if privs then
priv_area = priv_protector.get_area_priv(id)
if privs[priv_area] then
priv_excemption = true
end
end
if xp then
xp_area = xp_redo.get_area_xp_limits(id)
if xp_area then
if (xp_area.min and xp < xp_area.min)
or (xp_area.max and xp > xp_area.max)
then
xp_limit = true
end
end
end
if area.flak then
flak = true
end
owners[area.owner] = true
end
-- none of the areas has FLAK set -> friendly
-- any of the overlapping areas is open -> friendly
-- owners of overlapping areas -> safe
if not flak or open or owners[name] then
return true
end
-- privilaged players -> safe
if privs and priv_excemption then
return true
end
-- xp limits -> unfriendly
if xp and not xp_limit then
return true
end
return false
end
local function shoot_flak_sound(pos)
minetest.sound_play("deltaglider_flak_shot", {
pos = pos,
max_hear_distance = 30,
gain = 10.0,
}, true)
end
local function equip_sound(pos)
minetest.sound_play("deltaglider_equip", {
pos = pos,
max_hear_distance = 8,
gain = 1.0,
}, true)
end
local function player_controls(player)
local meta = player:get_meta()
local pro = 1 == meta:get_int("deltaglider.pro")
if mouse_controls and keyboard_controls then
return 0 == meta:get_int("deltaglider.keyC"), pro
else
return mouse_controls, pro
end
end
local huds = {}
local rad2deg = 180 / math_pi
local function update_hud(name, player, rot, rocket_time, speed, vV)
local info = ""
if rot and (0 == player:get_meta():get_int("deltaglider.HUDd")) then
-- glider in use and HUD not disabled
local pitch = string.format("%.1f", rot.x * rad2deg)
local yaw = rot.y
if 0 > yaw then
yaw = yaw + math_pi2
elseif math_pi2 < yaw then
yaw = yaw - math_pi2
end
local heading = math_floor((yaw * rad2deg) + 0.5)
local climb = string.format("%.1f", math_abs(vV))
local sign = 0 == vV and "=" or (0 < vV and "+" or "-")
info = S("Pitch") .. ": " .. pitch .. "°"
.. " " .. S("Heading") .. ": " .. heading .. "°"
.. "\n"
.. S("Lift") .. ": " .. sign .. climb
.. " " .. S("Altitude") .. ": "
.. math_floor(player:get_pos().y + 0.5)
.. " " .. S("Speed") .. ": " .. math_floor(speed + 0.5)
.. (0 < rocket_time
and ("\n" .. S("Cooldown") .. ": "
.. math_floor(rocket_time + 0.5) .. "s") or "")
end
if huds[name] then
player:hud_change(huds[name], "text", info)
return
end
huds[name] = player:hud_add({
hud_elem_type = "text",
position = {x = 0.5, y = 0.8},
offset = {x = 0, y = 0},
text = info,
alignment = 0,
scale = { x = 300, y = 90},
number = 0xFFFFFF,
})
end
local function damage_player(player, damage)
player:set_hp(player:get_hp() - damage, { type = "fall" })
end
local function damage_glider(player, luaent, crash_damage)
if not glider_wear then
return
end
local index = luaent.wield_index
local inv = player:get_inventory()
local stack = inv:get_stack("main", index)
if stack:to_string() ~= luaent.tool_string then
local index_alt
index, stack = nil, nil
for i, is in ipairs(inv:get_list("main")) do
if is:get_name() == "deltaglider:glider" then
index_alt = i
end
if is:to_string() == luaent.tool_string then
index = i
break
end
end
index = index or index_alt
if index then
stack = inv:get_stack("main", index)
end
end
if stack then
stack:add_wear(crash_damage * crash_damage_wear_factor)
inv:set_stack("main", index, stack)
end
end
local function rot_to_dir(rot)
return vector_new(
-math_cos(rot.x) * math_sin(rot.y),
math_sin(rot.x),
math_cos(rot.x) * math_cos(rot.y)
)
end
local function get_pitch_lift(y)
return -(1964 / 1755 * y * y * y * y)
- (2549 / 3510 * y * y * y)
+ (2591 / 7020 * y * y) + (2594 / 3510 * y) + 0.75
end
local on_step = function(self, dtime, moveresult)
local player = self.object:get_children()[1]
if not player then
-- player logged off or died
self.object:remove()
return
end
if not deltaglider.allow_hangglider_while_gliding then
local luaent
for _, obj in ipairs(player:get_children()) do
luaent = obj:get_luaentity()
if luaent and luaent.name == "hangglider:glider" then
damage_glider(player, self, 2)
player:set_detach()
player:set_eye_offset(vector_zero(), vector_zero())
remove_physics_overrides(player)
player:add_velocity(self.object:get_velocity())
update_hud(self.player_name, player)
self.object:remove()
return
end
end
--luaent = nil
end
self.time_from_last_rocket = math_min(
self.time_from_last_rocket + dtime, rocket_cooldown)
local vel = self.object:get_velocity()
local speed = self.speed
local rot = self.object:get_rotation()
local pos = self.object:get_pos()
-- Check surroundings
local land = false
local crash_speed, crash_damage = 0
if moveresult and moveresult.collisions and moveresult.collides then
for _ ,collision in pairs(moveresult.collisions) do
land = true
crash_speed = math_abs(crash_speed
+ collision.old_velocity.x
- collision.new_velocity.x
+ collision.old_velocity.y
- collision.new_velocity.y
+ collision.old_velocity.z
- collision.new_velocity.z)
end
end
if land then
crash_damage = math_floor(math_max(crash_speed - 5, 0))
if crash_damage > 0 then
local node = minetest.get_node(pos)
if minetest.registered_nodes[node.name].liquidtype == "none" then
-- damage glider first
damage_glider(player, self, crash_damage)
damage_player(player, crash_damage)
end
end
elseif not friendly_airspace(pos, self.player_name,
self.xp, self.privs)
then
if not self.flak_timer then
self.flak_timer = 0
shoot_flak_sound(pos)
minetest.chat_send_player(self.player_name, flak_warning)
else
self.flak_timer = self.flak_timer + dtime
end
if self.flak_timer > flak_warning_time then
player:set_hp(1, {
type = "set_hp", cause = "deltaglider:flak"
})
-- destroy glider
damage_glider(player, self, 1 + 65535 / crash_damage_wear_factor)
shoot_flak_sound(pos)
land = true
end
else
land, crash_damage = custom_grounded_checks(
self.player_name, player, self)
if 0 ~= crash_damage then
damage_glider(player, self, crash_damage)
damage_player(player, crash_damage)
end
end
if land then
player:set_detach()
player:set_eye_offset(vector_zero(), vector_zero())
remove_physics_overrides(player)
player:add_velocity(vel)
self.object:remove()
equip_sound(pos)
update_hud(self.player_name, player)
return
end
local mouse, pro = player_controls(player)
if mouse then
local ver = player:get_look_vertical()
if not pro then
rot.x = rot.x + (-ver - rot.x) * dtime * 2
else
rot.x = rot.x + (ver - rot.x) * dtime * 2
end
local hor = player:get_look_horizontal()
local angle = hor - rot.y
if angle < -math_pi then
angle = angle + math_pi2
elseif angle > math_pi then
angle = angle - math_pi2
end
rot.y = rot.y + angle * dtime * 2
speed = speed - math_abs(angle * dtime)
rot.z = -angle
else
local keys = player:get_player_control()
-- ignore if both directions are pressed
if keys.up or keys.down then
if not pro then
-- inverted controls
if keys.up then
rot.x = rot.x + dtime * 0.25
elseif keys.down then
rot.x = rot.x - dtime * 0.25
end
else
-- pro pilot controls: forward pushes
-- nose down, back pulls up
if keys.up then
rot.x = rot.x - dtime * 0.25
elseif keys.down then
rot.x = rot.x + dtime * 0.25
end
end
end
-- ignore if both directions are pressed
if keys.left or keys.right then
if keys.left then
rot.z = rot.z - 2 * dtime * 0.5
elseif keys.right then
rot.z = rot.z + 2 * dtime * 0.5
end
end
if rot.z ~= 0 then
speed = speed - math_abs(rot.z * dtime)
if math_abs(rot.z) < 0.01 then
rot.z = 0
end
rot.y = rot.y - rot.z * dtime
rot.z = rot.z - rot.z * dtime
end
end
speed = math_min(max_speed, math_max(2,
(speed - (rot.x ^ 3) * 4 * dtime) - speed * 0.01 * dtime))
self.object:set_rotation(rot)
local dir = rot_to_dir(rot)
local lift = speed * 0.5 * get_pitch_lift(dir.y)
* (1 - (math_abs(rot.z / math_pi)))
local vertical_acc = lift - 5
self.grav_speed = math_min(math_max(self.grav_speed
+ vertical_acc * dtime, -10), 1)
dir = vector_new(
dir.x * speed,
dir.y * speed + self.grav_speed,
dir.z * speed
)
self.speed = speed
self.object:set_velocity(dir)
update_hud(self.player_name, player, rot,
rocket_cooldown - self.time_from_last_rocket, speed, dir.y)
end
local on_use = function(itemstack, player)
if type(player) ~= "userdata" then
return -- Real players only
end
local name = player:get_player_name()
local pos = player:get_pos()
local attach = player:get_attach()
local luaent, vel
if attach then
luaent = attach:get_luaentity()
if luaent.name == "deltaglider:hangglider" then
vel = attach:get_velocity()
attach:remove()
player:set_detach()
player:set_eye_offset(vector_zero(), vector_zero())
remove_physics_overrides(player)
player:add_velocity(vel)
equip_sound(pos)
update_hud(name, player)
end
else
if not deltaglider.allow_while_hanggliding then
for _, obj in ipairs(player:get_children()) do
luaent = obj:get_luaentity()
if luaent and luaent.name == "hangglider:glider" then
return
end
end
end
local grounded, damage = custom_grounded_checks(name, player)
if grounded then
if 0 ~= damage then
itemstack:add_wear(damage * crash_damage_wear_factor)
damage_player(player, damage)
end
return itemstack
end
pos.y = pos.y + 1.5
local ent = minetest.add_entity(pos, "deltaglider:hangglider")
if not ent then
-- failed to create entity -> abort
return
end
luaent = ent:get_luaentity()
luaent.player_name = name
if has_xp_redo then
luaent.xp = xp_redo.get_xp(name)
end
if has_priv_protector then
luaent.privs = minetest.get_player_privs(name)
end
local rot = vector_new(
-player:get_look_vertical(),
player:get_look_horizontal(),
0
)
ent:set_rotation(rot)
vel = vector_multiply(player:get_velocity(), 2)
ent:set_velocity(vel)
luaent.speed = math_sqrt(vel.x ^ 2 + (vel.y * 0.25) ^ 2 + vel.z ^ 2)
player:set_attach(ent, "", vector_new(0, 0, -10),
vector_new(90, 0, 0))
player:set_eye_offset(vector_new(0, -16.25, 0),
vector_new(0, -15, 0))
set_physics_overrides(player, { jump = 0, gravity = 0.25 })
local color = itemstack:get_meta():get("glider_color")
if color then
ent:set_properties({
textures = { "wool_white.png^[multiply:#" .. color }
})
end
if glider_wear then
itemstack:add_wear(glider_wear)
luaent.wield_index = player:get_wield_index()
luaent.tool_string = itemstack:to_string()
end
equip_sound(pos)
return itemstack
end
end
local function on_place(_, player)
if type(player) ~= "userdata" then
return -- Real players only
end
local meta = player:get_meta()
local keys = player:get_player_control()
if keys.aux1 and keys.sneak then
-- change inverted up/down
-- read and toggle in one line
local pro = 0 == meta:get_int("deltaglider.pro")
meta:set_int("deltaglider.pro", pro and 1 or 0)
minetest.chat_send_player(player:get_player_name(),
pro
and S("Normal up/down activated (pro pilot).")
or S("Inverted up/down activated (novice)."))
elseif mouse_controls and keyboard_controls
and keys.sneak
then
-- toggle mouse/keyboard control
-- read and toggle in one line
local key_c = 0 == meta:get_int("deltaglider.keyC")
meta:set_int("deltaglider.keyC", key_c and 1 or 0)
minetest.chat_send_player(player:get_player_name(),
key_c
and S("Keyboard controls activated.")
or S("Mouse controls activated."))
end
end
minetest.register_entity("deltaglider:hangglider", {
physical = true,
pointable = false,
visual = "mesh",
mesh = "deltaglider_hangglider.obj",
textures = { "deltaglider_hangglider.png" },
static_save = false,
--Functions
on_step = on_step,
grav_speed = 0,
player_name = "",
free_fall = false,
speed = 0,
time_from_last_rocket = rocket_cooldown,
})
minetest.register_tool("deltaglider:glider", {
description = S("Delta Glider"),
inventory_image = "deltaglider_glider.png",
on_use = on_use,
on_secondary_use = on_place,
})
local mp = minetest.get_modpath("deltaglider")
dofile(mp .. "/crafts.lua")
if use_rockets then
dofile(mp .. "/rocket.lua")
end
minetest.register_on_dieplayer(function(player)
remove_physics_overrides(player)
update_hud(player:get_player_name(), player)
end)
minetest.register_on_leaveplayer(function(player)
remove_physics_overrides(player)
huds[player:get_player_name()] = nil
end)
minetest.register_alias("glider:glider", "deltaglider:glider")
minetest.register_alias("glider:rocket", "deltaglider:rocket")
minetest.register_alias("glider:hangglider", "deltaglider:hangglider")
print("[deltaglider] loaded with"
.. (use_rockets and " " or "out ") .. "rockets.")