nalc_game/mods/boats/init.lua
paramat da0fe31443 Boats: Raise collisionbox top surface to fix boat behaviour
Lowering the top surface to be level with the boat top somehow
causes the boat to fall through world if underwater. Revert to
previous position that is needed for correct behaviour
2016-06-14 23:29:21 +01:00

250 lines
5.9 KiB
Lua

--
-- 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_sign(i)
if i == 0 then
return 0
else
return i / math.abs(i)
end
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 = {
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
}
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 clicker == self.driver then
self.driver = nil
clicker:set_detach()
default.player_attached[name] = false
default.player_set_animation(clicker, "stand" , 30)
local pos = clicker:getpos()
pos = {x = pos.x, y = pos.y + 0.2, z = pos.z}
minetest.after(0.1, function()
clicker:setpos(pos)
end)
elseif not self.driver then
local attach = clicker:get_attach()
if attach and attach:get_luaentity() then
local luaentity = attach:get_luaentity()
if luaentity.driver then
luaentity.driver = nil
end
clicker:set_detach()
end
self.driver = clicker
clicker:set_attach(self.object, "",
{x = 0, y = 11, z = -3}, {x = 0, y = 0, z = 0})
default.player_attached[name] = true
minetest.after(0.2, function()
default.player_set_animation(clicker, "sit" , 30)
end)
self.object:setyaw(clicker:get_look_yaw() - math.pi / 2)
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
if self.driver and puncher == self.driver then
self.driver = nil
puncher:set_detach()
default.player_attached[puncher:get_player_name()] = false
end
if not self.driver then
self.removed = true
-- delay remove to ensure player is detached
minetest.after(0.1, function()
self.object:remove()
end)
if not minetest.setting_getbool("creative_mode") then
local inv = puncher:get_inventory()
if inv:room_for_item("main", "boats:boat") then
inv:add_item("main", "boats:boat")
else
minetest.add_item(self.object:getpos(), "boats:boat")
end
end
end
end
function boat.on_step(self, dtime)
self.v = get_v(self.object:getvelocity()) * get_sign(self.v)
if self.driver then
local ctrl = self.driver:get_player_control()
local yaw = self.object:getyaw()
if ctrl.up then
self.v = self.v + 0.1
elseif ctrl.down then
self.v = self.v - 0.1
end
if ctrl.left then
if self.v < 0 then
self.object:setyaw(yaw - (1 + dtime) * 0.03)
else
self.object:setyaw(yaw + (1 + dtime) * 0.03)
end
elseif ctrl.right then
if self.v < 0 then
self.object:setyaw(yaw + (1 + dtime) * 0.03)
else
self.object:setyaw(yaw - (1 + dtime) * 0.03)
end
end
end
local velo = self.object:getvelocity()
if self.v == 0 and velo.x == 0 and velo.y == 0 and velo.z == 0 then
self.object:setpos(self.object:getpos())
return
end
local s = get_sign(self.v)
self.v = self.v - 0.02 * s
if s ~= get_sign(self.v) then
self.object:setvelocity({x = 0, y = 0, z = 0})
self.v = 0
return
end
if math.abs(self.v) > 5 then
self.v = 5 * get_sign(self.v)
end
local p = self.object:getpos()
p.y = p.y - 0.5
local new_velo = {x = 0, y = 0, z = 0}
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:getyaw(),
self.object:getvelocity().y)
self.object:setpos(self.object:getpos())
else
p.y = p.y + 1
if is_water(p) then
local y = self.object:getvelocity().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:getyaw(), y)
self.object:setpos(self.object:getpos())
else
new_acce = {x = 0, y = 0, z = 0}
if math.abs(self.object:getvelocity().y) < 1 then
local pos = self.object:getpos()
pos.y = math.floor(pos.y) + 0.5
self.object:setpos(pos)
new_velo = get_velocity(self.v, self.object:getyaw(), 0)
else
new_velo = get_velocity(self.v, self.object:getyaw(),
self.object:getvelocity().y)
self.object:setpos(self.object:getpos())
end
end
end
self.object:setvelocity(new_velo)
self.object:setacceleration(new_acce)
end
minetest.register_entity("boats:boat", boat)
minetest.register_craftitem("boats:boat", {
description = "Boat",
inventory_image = "boats_inventory.png",
wield_image = "boats_wield.png",
wield_scale = {x = 2, y = 2, z = 1},
liquids_pointable = true,
on_place = function(itemstack, placer, pointed_thing)
if pointed_thing.type ~= "node" then
return
end
if not is_water(pointed_thing.under) then
return
end
pointed_thing.under.y = pointed_thing.under.y + 0.5
minetest.add_entity(pointed_thing.under, "boats:boat")
if not minetest.setting_getbool("creative_mode") then
itemstack:take_item()
end
return itemstack
end,
})
minetest.register_craft({
output = "boats:boat",
recipe = {
{"", "", "" },
{"group:wood", "", "group:wood"},
{"group:wood", "group:wood", "group:wood"},
},
})