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--
-- Helper functions
--
local function is_water(pos)
local nn = minetest.get_node(pos).name
return minetest.get_item_group(nn, "liquid") ~= 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
--
-- bike entity
--
local bike = {
physical = true,
-- Warning: Do not change the position of the collisionbox top surface,
-- lowering it causes the bike to fall through the world if underwater
collisionbox = {-0.5, -0.35, -0.5, 0.5, 0.3, 0.5},
visual = "mesh",
mesh = "bike_bike.obj",
textures = {"default_wood.png"},
stepheight = 0.6,
driver = nil,
v = 0,
last_v = 0,
removed = false
}
function bike.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.object:setvelocity({x = 0, y = 0, z = 0})
self.v = 0
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)
clicker:set_look_horizontal(self.object:getyaw())
end
end
function bike.on_activate(self, staticdata, dtime_s)
self.object:setacceleration({x = 0, y = -9.8, z = 0})
self.object:set_armor_groups({immortal = 1})
if staticdata then
self.v = tonumber(staticdata)
end
self.last_v = self.v
end
function bike.get_staticdata(self)
return tostring(self.v)
end
function bike.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
local inv = puncher:get_inventory()
if not (creative and creative.is_enabled_for
and creative.is_enabled_for(puncher:get_player_name()))
or not inv:contains_item("main", "bike:bike") then
local leftover = inv:add_item("main", "bike:bike")
-- if no room in inventory add a replacement bike to the world
if not leftover:is_empty() then
minetest.add_item(self.object:getpos(), leftover)
end
end
-- delay remove to ensure player is detached
minetest.after(0.1, function()
self.object:remove()
end)
end
end
function bike.on_step(self, dtime)
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 - 0.004 * s
if s ~= get_sign(self.v) then
self.object:setvelocity({x = 0, y = 0, z = 0})
self.v = 0
return
end
if self.v > 10 then
self.v = 10
elseif self.v < 0 then
self.v = 0
end
local p = self.object:getpos()
if is_water(p) then
self.v = self.v / 1.3
end
local new_velo
new_velo = get_velocity(self.v, self.object:getyaw(), self.object:getvelocity().y)
self.object:setpos(self.object:getpos())
self.object:setvelocity(new_velo)
end
minetest.register_entity("bike:bike", bike)
minetest.register_craftitem("bike:bike", {
description = "bike",
inventory_image = "bike_inventory.png",
wield_image = "bike_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
bike = minetest.add_entity(pointed_thing.above, "bike:bike")
if bike then
if placer then
bike:setyaw(placer:get_look_horizontal())
end
local player_name = placer and placer:get_player_name() or ""
if not (creative and creative.is_enabled_for and
creative.is_enabled_for(player_name)) then
itemstack:take_item()
end
end
return itemstack
end,
})
--[[minetest.register_craft({
output = "bike:bike",
recipe = {
{"", "", "" },
{"group:wood", "", "group:wood"},
{"group:wood", "group:wood", "group:wood"},
},
})
minetest.register_craft({
type = "fuel",
recipe = "bike:bike",
burntime = 20,
})--]]
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