175 lines
4.5 KiB
Lua
175 lines
4.5 KiB
Lua
|
|
--
|
|
-- Parachute mod
|
|
-- By webdesigner97 (license of original mod: WTFPL)
|
|
-- Tweaked by Kaadmy, for Pixture
|
|
--
|
|
|
|
local S = minetest.get_translator("parachute")
|
|
|
|
local function air_physics(v)
|
|
local m = 80 -- Weight of player, kg
|
|
local g = -9.81 -- Earth Acceleration, m/s^2
|
|
local cw = 1.25 -- Drag coefficient
|
|
local rho = 1.2 -- Density of air (on ground, not accurate), kg/m^3
|
|
local A = 25 -- Surface of the parachute, m^2
|
|
|
|
return ((m * g + 0.5 * cw * rho * A * v * v) / m)
|
|
end
|
|
|
|
minetest.register_craftitem(
|
|
"parachute:parachute", {
|
|
description = S("Parachute"),
|
|
inventory_image = "parachute_inventory.png",
|
|
wield_image = "parachute_inventory.png",
|
|
stack_max = 1,
|
|
on_use = function(itemstack, player, pointed_thing)
|
|
local name = player:get_player_name()
|
|
|
|
local pos = player:get_pos()
|
|
|
|
local on = minetest.get_node({x = pos.x, y = pos.y - 1, z = pos.z})
|
|
|
|
if default.player_attached[name] then
|
|
return
|
|
end
|
|
|
|
if on.name == "air" then
|
|
-- Spawn parachute
|
|
pos.y = pos.y + 3
|
|
|
|
local ent = minetest.add_entity(pos, "parachute:entity")
|
|
|
|
ent:set_velocity(
|
|
{
|
|
x = 0,
|
|
y = math.min(0, player:get_player_velocity().y),
|
|
z = 0
|
|
})
|
|
|
|
player:set_attach(ent, "", {x = 0, y = -8, z = 0}, {x = 0, y = 0, z = 0})
|
|
|
|
ent:set_yaw(player:get_look_horizontal())
|
|
|
|
ent = ent:get_luaentity()
|
|
ent.attached = name
|
|
|
|
default.player_attached[player:get_player_name()] = true
|
|
|
|
if not minetest.settings:get_bool("creative_mode") then
|
|
itemstack:take_item()
|
|
end
|
|
|
|
return itemstack
|
|
else
|
|
minetest.chat_send_player(
|
|
player:get_player_name(),
|
|
minetest.colorize("#FFFF00", S("Cannot open parachute on ground!")))
|
|
end
|
|
end
|
|
})
|
|
|
|
minetest.register_entity(
|
|
"parachute:entity",
|
|
{
|
|
visual = "mesh",
|
|
mesh = "parachute.b3d",
|
|
textures = {"parachute_mesh.png"},
|
|
physical = false,
|
|
pointable = false,
|
|
automatic_face_movement_dir = -90,
|
|
attached = nil,
|
|
on_step = function(self, dtime)
|
|
local pos = self.object:get_pos()
|
|
local under = minetest.get_node({x = pos.x, y = pos.y - 1, z = pos.z})
|
|
|
|
if self.attached ~= nil then
|
|
local player = minetest.get_player_by_name(self.attached)
|
|
|
|
local vel = self.object:get_velocity()
|
|
|
|
local accel = {x = 0, y = 0, z = 0}
|
|
|
|
local lookyaw = math.pi - player:get_look_horizontal()
|
|
|
|
if lookyaw < 0 then
|
|
lookyaw = lookyaw + (math.pi * 2)
|
|
end
|
|
|
|
if lookyaw >= (math.pi * 2) then
|
|
lookyaw = lookyaw - (math.pi * 2)
|
|
end
|
|
-- self.object:set_yaw(lookyaw)
|
|
|
|
local s = math.sin(lookyaw)
|
|
local c = math.cos(lookyaw)
|
|
|
|
local sr = math.sin(lookyaw - (math.pi / 2))
|
|
local cr = math.cos(lookyaw - (math.pi / 2))
|
|
|
|
local controls = player:get_player_control()
|
|
|
|
local speed = 4.0
|
|
|
|
if controls.down then
|
|
accel.x = s * speed
|
|
accel.z = c * speed
|
|
elseif controls.up then
|
|
accel.x = s * -speed
|
|
accel.z = c * -speed
|
|
end
|
|
|
|
if controls.right then
|
|
accel.x = sr * speed
|
|
accel.z = cr * speed
|
|
elseif controls.left then
|
|
accel.x = sr * -speed
|
|
accel.z = cr * -speed
|
|
end
|
|
|
|
accel.y = accel.y + air_physics(vel.y) * 0.25
|
|
|
|
self.object:set_acceleration(accel)
|
|
|
|
if under.name ~= "air" then
|
|
default.player_attached[self.attached] = false
|
|
end
|
|
end
|
|
|
|
if under.name ~= "air" then
|
|
if self.attached ~= nil then
|
|
default.player_attached[self.attached] = false
|
|
|
|
self.object:set_detach()
|
|
end
|
|
|
|
self.object:remove()
|
|
end
|
|
end
|
|
})
|
|
|
|
-- Crafting
|
|
|
|
crafting.register_craft(
|
|
{
|
|
output = "parachute:parachute",
|
|
items = {
|
|
"group:fuzzy 3",
|
|
"default:rope 4",
|
|
"default:stick 6",
|
|
}
|
|
})
|
|
|
|
-- Achievements
|
|
|
|
achievements.register_achievement(
|
|
"sky_diver",
|
|
{
|
|
title = S("Skydiver"),
|
|
description = S("Craft 5 parachutes."),
|
|
times = 5,
|
|
craftitem = "parachute:parachute",
|
|
})
|
|
|
|
default.log("mod:parachute", "loaded")
|