339 lines
11 KiB
Lua
339 lines
11 KiB
Lua
-- Hangglider mod for Minetest
|
|
-- Original code by Piezo_ (orderofthefourthwall@gmail.com)
|
|
-- 2018-11-14
|
|
|
|
-- Modifications by David G (kestral246@gmail.com)
|
|
-- 2018-11-24
|
|
-- For Minetest 5.x, glider's set_attach needs to be offset by 1 node
|
|
-- Switch to alternate commented line below with correct offset.
|
|
-- Additional tuning of parameters.
|
|
-- Commented out debug hud display code, prefixed with "--debug:".
|
|
|
|
-- 2018-11-22
|
|
-- Give visual indication that hangglider is equiped.
|
|
-- Display simple overlay with blurred struts when equiped.
|
|
-- Issue: don't know how to disable overlay in third person view.
|
|
-- Also Unequip hangglider when landing on water.
|
|
-- Attempt to linearize parabolic flight path.
|
|
-- Start gravity stronger, but gradually reduce it as descent velocity increases.
|
|
-- Don't use airstopper when equipped from the ground (descent velocity is low).
|
|
-- Slightly increase flight speed to 1.25.
|
|
-- Unequip/equip cycling mid-flight should not fly farther than continuous flight.
|
|
-- When equipping mid-air (descent velocity higher), use airstopper but increase descent slope afterwards.
|
|
-- Create airbreak flag so all equips mid-flight use faster descent.
|
|
-- Reset airbreak flag only when land (canExist goes false).
|
|
-- Issue: it wouldn't reset if land in water, use fly, and launch from air, before I added test for water,
|
|
-- not sure if there are other such cases.
|
|
-- Temporarily add hud debug display to show descent velocity, gravity override, and airbreak flag.
|
|
-- Still in process of tuning all the parameters.
|
|
|
|
|
|
-- Modifications by Piezo_
|
|
-- 2018-11-25
|
|
-- hud overlay and debug can be enabled/disabled
|
|
-- Added blender-rendered overlay for struts using the actual model.
|
|
-- Reduced airbreak penalty severity
|
|
-- gave glider limited durability.
|
|
-- Improved gravity adjustment function.
|
|
-- Changed airbreaking process
|
|
-- Removed airbreak penalty, as any 'advantage' seems minimal after new adjustments
|
|
|
|
|
|
-- Modifications by gpcf
|
|
-- 2018-12-09
|
|
-- get shot down while flying over protected areas marked as no-fly-zones (flak, from German Flugabwehrkanone)
|
|
-- set these areas with the /area_flak command
|
|
|
|
|
|
|
|
local HUD_Overlay = true --show glider struts as overlay on HUD
|
|
local debug = false --show debug info in top-center of hud
|
|
local moveModelUp = false
|
|
if tonumber(string.sub(minetest.get_version().string, 1, 1)) and tonumber(string.sub(minetest.get_version().string, 1, 1)) > 4 then
|
|
moveModelUp = true
|
|
end
|
|
hangglider = {} --Make this global, so other mods can tell if hangglider exists.
|
|
hangglider.use = {}
|
|
if HUD_Overlay then
|
|
hangglider.id = {} -- hud id for displaying overlay with struts
|
|
end
|
|
if debug then hangglider.debug = {} end -- hud id for debug data
|
|
--hangglider.airbreak = {} -- true if falling fast when equip
|
|
|
|
minetest.register_entity("hangglider:airstopper", { --A one-instant entity that catches the player and stops them.
|
|
is_visible = false,
|
|
physical = false,
|
|
immortal = true,
|
|
attach = nil,
|
|
on_step = function(self, _)
|
|
local canExist = false
|
|
if self.attach then
|
|
local player = self.attach
|
|
if player:is_player() then
|
|
local pname = player:get_player_name()
|
|
canExist = true
|
|
if player:get_player_velocity().y < 0.5 and player:get_player_velocity().y > -0.5 then
|
|
--Let go when the player actually stops, as that's the whole point.
|
|
if hangglider.use[pname] then
|
|
if moveModelUp then
|
|
minetest.add_entity(player:get_pos(), "hangglider:glider"):set_attach(player, "", {x=0,y=10,z=0}, {x=0,y=0,z=0})
|
|
else
|
|
minetest.add_entity(player:get_pos(), "hangglider:glider"):set_attach(player, "", {x=0,y=0,z=0}, {x=0,y=0,z=0})
|
|
end
|
|
end
|
|
canExist = false
|
|
end
|
|
end
|
|
if not canExist then
|
|
player:set_detach()
|
|
end
|
|
end
|
|
if not canExist then
|
|
self.object:remove()
|
|
end
|
|
end
|
|
})
|
|
|
|
if areas then
|
|
hangglider.flak = true
|
|
-- chat command definition essentially copied from areas mod.
|
|
minetest.register_chatcommand("area_flak",{
|
|
params = "<ID>",
|
|
description = "Toggle airspace restrictions for area <ID>",
|
|
func = function(name, param)
|
|
local id = tonumber(param)
|
|
if not id then
|
|
return false, "Invalid usage, see /help area_flak."
|
|
end
|
|
|
|
if not areas:isAreaOwner(id, name) then
|
|
return false, "Area "..id.." does not exist"
|
|
.." or is not owned by you."
|
|
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, ("Area's airspace %s."):format(open and "closed" or "opened")
|
|
end
|
|
})
|
|
end
|
|
|
|
if minetestd and minetestd.services.gravityctl.enabled then
|
|
minetestd.gravityctl.register_gravity_effect("hangglider",
|
|
function(player)
|
|
return hangglider.use[player:get_player_name()]
|
|
end,
|
|
function(gravity, player)
|
|
local vel = player:get_player_velocity()
|
|
if debug then player:hud_change(hangglider.debug[pname].id, "text", vel.y..', '..player:get_physics_override().gravity..', '..tostring(hangglider.airbreak[pname])) end
|
|
return ((vel.y + 3)/20)
|
|
end,
|
|
7,
|
|
1000
|
|
)
|
|
end
|
|
|
|
hangglider.can_fly = function (pname, pos)
|
|
-- Checks if the player will get shot down at the position
|
|
if minetest.is_protected(vector.round(pos), pname) then
|
|
if hangglider.flak then
|
|
for id, area in pairs(areas:getAreasAtPos(pos)) do
|
|
if area.flak then
|
|
return false
|
|
end
|
|
end
|
|
end
|
|
end
|
|
return true
|
|
end
|
|
|
|
hangglider.shot_sound = function (pos)
|
|
minetest.sound_play("hangglider_flak_shot", {
|
|
pos = pos,
|
|
max_hear_distance = 30,
|
|
gain = 10.0,
|
|
})
|
|
end
|
|
|
|
local step_v
|
|
minetest.register_entity("hangglider:glider", {
|
|
visual = "mesh",
|
|
visual_size = {x = 12, y = 12},
|
|
mesh = "glider.obj",
|
|
immortal = true,
|
|
static_save = false,
|
|
textures = {"wool_white.png","default_wood.png"},
|
|
on_step = function(self, dtime)
|
|
local canExist = false
|
|
if self.object:get_attach() then
|
|
local player = self.object:get_attach("parent")
|
|
if player then
|
|
local pos = player:getpos()
|
|
local pname = player:get_player_name()
|
|
if hangglider.use[pname] then
|
|
local mrn_name = minetest.registered_nodes[minetest.get_node(vector.new(pos.x, pos.y-0.5, pos.z)).name]
|
|
if mrn_name then
|
|
if not (mrn_name.walkable or (mrn_name.drowning and mrn_name.drowning == 1)) then
|
|
canExist = true
|
|
step_v = player:get_player_velocity().y
|
|
if step_v < 0 then
|
|
player:set_physics_override({speed=math.abs(step_v/2) + 0.75})
|
|
else
|
|
player:set_physics_override({speed=1})
|
|
end
|
|
if not minetestd then
|
|
if debug then player:hud_change(hangglider.debug[pname].id, "text", step_v..', '..player:get_physics_override().gravity..', '..tostring(hangglider.airbreak[pname])) end
|
|
player:set_physics_override({gravity=((step_v + 3)/20)})
|
|
end
|
|
--[[local vel = player:get_player_velocity()
|
|
if debug then player:hud_change(hangglider.debug[pname].id, "text", vel.y..', '..grav..', '..tostring(hangglider.airbreak[pname])) end
|
|
|
|
player:set_physics_override({gravity = (vel.y + 2.0)/20})
|
|
]]end
|
|
end
|
|
end
|
|
if not hangglider.can_fly(pname,pos) then
|
|
if not self.warned then -- warning shot
|
|
self.warned = 0
|
|
hangglider.shot_sound(pos)
|
|
minetest.chat_send_player(pname, "Protected area! You will be shot down in two seconds by anti-aircraft guns!")
|
|
end
|
|
self.warned = self.warned + dtime
|
|
if self.warned > 2 then -- shoot down
|
|
player:set_hp(1)
|
|
player:get_inventory():remove_item("main", ItemStack("hangglider:hangglider"))
|
|
hangglider.shot_sound(pos)
|
|
canExist = false
|
|
end
|
|
end
|
|
if not canExist then
|
|
player:set_physics_override({
|
|
jump = 1,
|
|
speed = 1,
|
|
})
|
|
if not minetestd then
|
|
player:set_physics_override({gravity=1})
|
|
end
|
|
hangglider.use[pname] = false
|
|
if HUD_Overlay then
|
|
player:hud_change(hangglider.id[pname], "text", "blank.png")
|
|
end
|
|
--hangglider.airbreak[pname] = false
|
|
end
|
|
end
|
|
end
|
|
if not canExist then
|
|
self.object:set_detach()
|
|
self.object:remove()
|
|
end
|
|
end
|
|
})
|
|
|
|
minetest.register_on_dieplayer(function(player)
|
|
player:set_physics_override({
|
|
gravity = 1,
|
|
jump = 1,
|
|
})
|
|
hangglider.use[player:get_player_name()] = false
|
|
end)
|
|
|
|
|
|
minetest.register_on_joinplayer(function(player)
|
|
local pname = player:get_player_name()
|
|
player:set_physics_override({
|
|
gravity = 1,
|
|
jump = 1,
|
|
})
|
|
hangglider.use[pname] = false
|
|
if HUD_Overlay then
|
|
hangglider.id[pname] = player:hud_add({
|
|
hud_elem_type = "image",
|
|
text = "blank.png",
|
|
position = {x=0, y=0},
|
|
scale = {x=-100, y=-100},
|
|
alignment = {x=1, y=1},
|
|
offset = {x=0, y=0}
|
|
}) end
|
|
if debug then
|
|
hangglider.debug[pname] = {id = player:hud_add({hud_elem_type = "text",
|
|
position = {x=0.5, y=0.1},
|
|
text = "-",
|
|
number = 0xFF0000}), -- red text
|
|
-- ht = {50,50,50},
|
|
}
|
|
end
|
|
--hangglider.airbreak[pname] = false
|
|
end)
|
|
|
|
minetest.register_on_leaveplayer(function(player)
|
|
local pname = player:get_player_name()
|
|
hangglider.use[pname] = nil
|
|
if HUD_Overlay then hangglider.id[pname] = nil end
|
|
if debug then hangglider.debug[pname] = nil end
|
|
--hangglider.airbreak[pname] = nil
|
|
end)
|
|
|
|
minetest.register_tool("hangglider:hangglider", {
|
|
description = "Glider",
|
|
inventory_image = "glider_item.png",
|
|
stack_max=1,
|
|
on_use = function(itemstack, player, pointed_thing)
|
|
if not player then
|
|
return
|
|
end
|
|
local pos = player:get_pos()
|
|
local pname = player:get_player_name()
|
|
if minetest.get_node(pos).name == "air" and not hangglider.use[pname] then --Equip
|
|
minetest.sound_play("bedsheet", {pos=pos, max_hear_distance = 8, gain = 1.0})
|
|
if HUD_Overlay then player:hud_change(hangglider.id[pname], "text", "glider_struts.png") end
|
|
local airbreak = false
|
|
local vel = player:get_player_velocity().y
|
|
if vel < -1.5 then -- engage mid-air, falling fast, so stop but ramp velocity more quickly
|
|
--hangglider.airbreak[pname] = true
|
|
airbreak = true
|
|
local stopper = minetest.add_entity(pos, "hangglider:airstopper")
|
|
minetest.after(0, function(stopper, player) --"Extreme Measures"
|
|
stopper:set_pos(player:get_pos())
|
|
stopper:get_luaentity().attach = player
|
|
player:set_attach( stopper, "", {x=0,y=0,z=0}, {x=0,y=0,z=0})
|
|
end, stopper, player)
|
|
end
|
|
if not airbreak then
|
|
if moveModelUp then
|
|
minetest.add_entity(pos, "hangglider:glider"):set_attach(player, "", {x=0,y=10,z=0}, {x=0,y=0,z=0})
|
|
else
|
|
minetest.add_entity(pos, "hangglider:glider"):set_attach(player, "", {x=0,y=0,z=0}, {x=0,y=0,z=0})
|
|
end
|
|
end
|
|
hangglider.use[pname] = true
|
|
player:set_physics_override({jump = 0})
|
|
-- if minetest 0.4.x use this:
|
|
|
|
-- if minetest 5.x use this:
|
|
-- minetest.add_entity(player:get_pos(), "hangglider:glider"):set_attach(player, "", {x=0,y=10,z=0}, {x=0,y=0,z=0})
|
|
itemstack:set_wear(itemstack:get_wear() + 255)
|
|
return itemstack
|
|
elseif hangglider.use[pname] then --Unequip
|
|
if HUD_Overlay then player:hud_change(hangglider.id[pname], "text", "default_wood.png^[colorize:#0000:255") end
|
|
hangglider.use[pname] = false
|
|
end
|
|
end,
|
|
sound = {breaks = "default_tool_breaks"},
|
|
})
|
|
|
|
minetest.register_craft({
|
|
type = "shapeless",
|
|
output = "hangglider:hangglider",
|
|
recipe = {"default:paper", "default:paper", "default:paper", "default:paper", "hangglider:hangglider", "default:paper", "default:paper", "default:paper", "default:paper"},
|
|
})
|
|
|
|
minetest.register_craft({
|
|
output = "hangglider:hangglider",
|
|
recipe = {
|
|
{"wool:white", "wool:white", "wool:white"},
|
|
{"default:stick", "", "default:stick"},
|
|
{"", "default:stick", ""},
|
|
}
|
|
})
|