144 lines
3.9 KiB
Lua
144 lines
3.9 KiB
Lua
--
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-- Parachute mod
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-- By webdesigner97(No license?)
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-- Tweaked by Kaadmy, for Pixture
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--
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function a(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 = 1.33 -- 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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core.register_craftitem(
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"parachute:parachute", {
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description = "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 pos = player:getpos()
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local on = core.get_node({x = pos.x, y = pos.y - 1, z = pos.z})
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if default.player_attached[player:get_player_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 = core.add_entity(pos, "parachute:entity")
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ent:setvelocity({x = 0, y = player:get_player_velocity().y, z = 0})
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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:setyaw(player:get_look_yaw() - (math.pi / 2))
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ent = ent:get_luaentity()
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ent.attached = player
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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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core.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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core.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:getpos()
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local under = core.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 vel = self.object:getvelocity()
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local accel = {x = 0, y = 0, z = 0}
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local lookyaw = self.attached:get_look_yaw()
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local s = math.sin((math.pi * 0.5) - lookyaw)
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local c = math.cos((math.pi * 0.5) - lookyaw)
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local sr = math.sin(((math.pi * 0.5) - lookyaw) + (math.pi / 2))
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local cr = math.cos(((math.pi * 0.5) - lookyaw) + (math.pi / 2))
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local controls = self.attached:get_player_control()
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local speed = 3.0
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if controls.up then
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accel.x = s * speed
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accel.z = c * speed
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elseif controls.down 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 + a(vel.y) * 0.25
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self.object:setacceleration(accel)
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if under.name ~= "air" then
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default.player_attached[self.attached:get_player_name()] = false
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end
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end
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if under.name ~= "air" then
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default.player_attached[self.attached:get_player_name()] = false
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self.object:set_detach()
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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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core.register_craft(
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{
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output = "parachute:parachute",
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recipe = {
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{"group:fuzzy", "group:fuzzy", "group:fuzzy"},
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{"default:rope", "", "default:rope"},
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{"", "default:stick", ""}
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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 = "Sky Diver",
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description = "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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