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minetest_game/mods/boats/init.lua

291 lines
7.3 KiB
Lua

-- boats/init.lua
-- Load support for MT game translation.
local S = minetest.get_translator("boats")
--
-- Helper functions
--
local function is_water(pos)
local nn = minetest.get_node(pos).name
return minetest.get_item_group(nn, "water") ~= 0
end
local function get_velocity(v, yaw, y)
local x = -math.sin(yaw) * v
local z = math.cos(yaw) * v
return {x = x, y = y, z = z}
end
local function get_v(v)
return math.sqrt(v.x ^ 2 + v.z ^ 2)
end
--
-- Boat entity
--
local boat = {
initial_properties = {
physical = true,
-- Warning: Do not change the position of the collisionbox top surface,
-- lowering it causes the boat to fall through the world if underwater
collisionbox = {-0.5, -0.35, -0.5, 0.5, 0.3, 0.5},
visual = "mesh",
mesh = "boats_boat.obj",
textures = {"default_wood.png"},
},
driver = nil,
v = 0,
last_v = 0,
removed = false,
auto = false
}
function boat.on_rightclick(self, clicker)
if not clicker or not clicker:is_player() then
return
end
local name = clicker:get_player_name()
if self.driver and name == self.driver then
-- Cleanup happens in boat.on_detach_child
clicker:set_detach()
player_api.set_animation(clicker, "stand", 30)
local pos = clicker:get_pos()
pos = {x = pos.x, y = pos.y + 0.2, z = pos.z}
minetest.after(0.1, function()
clicker:set_pos(pos)
end)
elseif not self.driver then
clicker:set_attach(self.object, "",
{x = 0.5, y = 1, z = -3}, {x = 0, y = 0, z = 0})
self.driver = name
player_api.player_attached[name] = true
minetest.after(0.2, function()
player_api.set_animation(clicker, "sit", 30)
end)
clicker:set_look_horizontal(self.object:get_yaw())
end
end
-- If driver leaves server while driving boat
function boat.on_detach_child(self, child)
if child and child:get_player_name() == self.driver then
player_api.player_attached[child:get_player_name()] = false
self.driver = nil
self.auto = false
end
end
function boat.on_activate(self, staticdata, dtime_s)
self.object:set_armor_groups({immortal = 1})
if staticdata then
self.v = tonumber(staticdata)
end
self.last_v = self.v
end
function boat.get_staticdata(self)
return tostring(self.v)
end
function boat.on_punch(self, puncher)
if not puncher or not puncher:is_player() or self.removed then
return
end
local name = puncher:get_player_name()
if self.driver and name == self.driver then
self.driver = nil
puncher:set_detach()
player_api.player_attached[name] = false
end
if not self.driver then
self.removed = true
local inv = puncher:get_inventory()
if not minetest.is_creative_enabled(name)
or not inv:contains_item("main", "boats:boat") then
local leftover = inv:add_item("main", "boats:boat")
-- if no room in inventory add a replacement boat to the world
if not leftover:is_empty() then
minetest.add_item(self.object:get_pos(), leftover)
end
end
-- delay remove to ensure player is detached
minetest.after(0.1, function()
self.object:remove()
end)
end
end
function boat.on_step(self, dtime)
self.v = get_v(self.object:get_velocity()) * math.sign(self.v)
if self.driver then
local driver_objref = minetest.get_player_by_name(self.driver)
if driver_objref then
local ctrl = driver_objref:get_player_control()
if ctrl.up and ctrl.down then
if not self.auto then
self.auto = true
minetest.chat_send_player(self.driver, S("Boat cruise mode on"))
end
elseif ctrl.down then
self.v = self.v - dtime * 2.0
if self.auto then
self.auto = false
minetest.chat_send_player(self.driver, S("Boat cruise mode off"))
end
elseif ctrl.up or self.auto then
self.v = self.v + dtime * 2.0
end
if ctrl.left then
if self.v < -0.001 then
self.object:set_yaw(self.object:get_yaw() - dtime * 0.9)
else
self.object:set_yaw(self.object:get_yaw() + dtime * 0.9)
end
elseif ctrl.right then
if self.v < -0.001 then
self.object:set_yaw(self.object:get_yaw() + dtime * 0.9)
else
self.object:set_yaw(self.object:get_yaw() - dtime * 0.9)
end
end
end
end
local velo = self.object:get_velocity()
if not self.driver and
self.v == 0 and velo.x == 0 and velo.y == 0 and velo.z == 0 then
self.object:set_pos(self.object:get_pos())
return
end
-- We need to preserve velocity sign to properly apply drag force
-- while moving backward
local drag = dtime * math.sign(self.v) * (0.01 + 0.0796 * self.v * self.v)
-- If drag is larger than velocity, then stop horizontal movement
if math.abs(self.v) <= math.abs(drag) then
self.v = 0
else
self.v = self.v - drag
end
local p = self.object:get_pos()
p.y = p.y - 0.5
local new_velo
local new_acce = {x = 0, y = 0, z = 0}
if not is_water(p) then
local nodedef = minetest.registered_nodes[minetest.get_node(p).name]
if (not nodedef) or nodedef.walkable then
self.v = 0
new_acce = {x = 0, y = 1, z = 0}
else
new_acce = {x = 0, y = -9.8, z = 0}
end
new_velo = get_velocity(self.v, self.object:get_yaw(),
self.object:get_velocity().y)
self.object:set_pos(self.object:get_pos())
else
p.y = p.y + 1
if is_water(p) then
local y = self.object:get_velocity().y
if y >= 5 then
y = 5
elseif y < 0 then
new_acce = {x = 0, y = 20, z = 0}
else
new_acce = {x = 0, y = 5, z = 0}
end
new_velo = get_velocity(self.v, self.object:get_yaw(), y)
self.object:set_pos(self.object:get_pos())
else
new_acce = {x = 0, y = 0, z = 0}
if math.abs(self.object:get_velocity().y) < 1 then
local pos = self.object:get_pos()
pos.y = math.floor(pos.y) + 0.5
self.object:set_pos(pos)
new_velo = get_velocity(self.v, self.object:get_yaw(), 0)
else
new_velo = get_velocity(self.v, self.object:get_yaw(),
self.object:get_velocity().y)
self.object:set_pos(self.object:get_pos())
end
end
end
self.object:set_velocity(new_velo)
self.object:set_acceleration(new_acce)
end
minetest.register_entity("boats:boat", boat)
minetest.register_craftitem("boats:boat", {
description = S("Boat"),
inventory_image = "boats_inventory.png",
wield_image = "boats_wield.png",
wield_scale = {x = 2, y = 2, z = 1},
liquids_pointable = true,
groups = {flammable = 2},
on_place = function(itemstack, placer, pointed_thing)
local under = pointed_thing.under
local node = minetest.get_node(under)
local udef = minetest.registered_nodes[node.name]
if udef and udef.on_rightclick and
not (placer and placer:is_player() and
placer:get_player_control().sneak) then
return udef.on_rightclick(under, node, placer, itemstack,
pointed_thing) or itemstack
end
if pointed_thing.type ~= "node" then
return itemstack
end
if not is_water(pointed_thing.under) then
return itemstack
end
pointed_thing.under.y = pointed_thing.under.y + 0.5
boat = minetest.add_entity(pointed_thing.under, "boats:boat")
if boat then
if placer then
boat:set_yaw(placer:get_look_horizontal())
end
local player_name = placer and placer:get_player_name() or ""
if not minetest.is_creative_enabled(player_name) then
itemstack:take_item()
end
end
return itemstack
end,
})
minetest.register_craft({
output = "boats:boat",
recipe = {
{"", "", "" },
{"group:wood", "", "group:wood"},
{"group:wood", "group:wood", "group:wood"},
},
})
minetest.register_craft({
type = "fuel",
recipe = "boats:boat",
burntime = 20,
})