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