MineClone2/mods/ENTITIES/mcl_minecarts/init.lua

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local S = minetest.get_translator("mcl_minecarts")
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mcl_minecarts = {}
mcl_minecarts.modpath = minetest.get_modpath("mcl_minecarts")
mcl_minecarts.speed_max = 10
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mcl_minecarts.check_float_time = 15
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dofile(mcl_minecarts.modpath.."/functions.lua")
dofile(mcl_minecarts.modpath.."/rails.lua")
-- Table for item-to-entity mapping. Keys: itemstring, Values: Corresponding entity ID
local entity_mapping = {}
local function register_entity(entity_id, mesh, textures, drop, on_rightclick)
local cart = {
physical = false,
collisionbox = {-10/16., -0.5, -10/16, 10/16, 0.25, 10/16},
visual = "mesh",
mesh = mesh,
visual_size = {x=1, y=1},
textures = textures,
on_rightclick = on_rightclick,
_driver = nil, -- player who sits in and controls the minecart (only for minecart!)
_punched = false, -- used to re-send _velocity and position
_velocity = {x=0, y=0, z=0}, -- only used on punch
_start_pos = nil, -- Used to calculate distance for “On A Rail” achievement
_last_float_check = nil, -- timestamp of last time the cart was checked to be still on a rail
_old_dir = {x=0, y=0, z=0},
_old_pos = nil,
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_old_vel = {x=0, y=0, z=0},
_old_switch = 0,
_railtype = nil,
}
function cart:on_activate(staticdata, dtime_s)
local data = minetest.deserialize(staticdata)
if type(data) == "table" then
self._railtype = data._railtype
end
self.object:set_armor_groups({immortal=1})
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end
function cart:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
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local pos = self.object:get_pos()
if not self._railtype then
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local node = minetest.get_node(vector.floor(pos)).name
self._railtype = minetest.get_item_group(node, "connect_to_raillike")
end
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if not puncher or not puncher:is_player() then
local cart_dir = mcl_minecarts:get_rail_direction(pos, {x=1, y=0, z=0}, nil, nil, self._railtype)
if vector.equals(cart_dir, {x=0, y=0, z=0}) then
return
end
self._velocity = vector.multiply(cart_dir, 3)
self._old_pos = nil
self._punched = true
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return
end
if puncher:get_player_control().sneak then
if self._driver then
if self._old_pos then
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self.object:set_pos(self._old_pos)
end
mcl_player.player_attached[self._driver] = nil
local player = minetest.get_player_by_name(self._driver)
if player then
player:set_detach()
player:set_eye_offset({x=0, y=0, z=0},{x=0, y=0, z=0})
end
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end
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-- Disable detector rail
local rou_pos = vector.round(pos)
local node = minetest.get_node(rou_pos)
if node.name == "mcl_minecarts:detector_rail_on" then
local newnode = {name="mcl_minecarts:detector_rail", param2 = node.param2}
minetest.swap_node(rou_pos, newnode)
mesecon.receptor_off(rou_pos)
end
-- Drop items and remove cart entity
if not minetest.settings:get_bool("creative_mode") then
for d=1, #drop do
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minetest.add_item(self.object:get_pos(), drop[d])
end
elseif puncher and puncher:is_player() then
local inv = puncher:get_inventory()
for d=1, #drop do
if not inv:contains_item("main", drop[d]) then
inv:add_item("main", drop[d])
end
end
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end
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self.object:remove()
return
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end
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local vel = self.object:get_velocity()
if puncher:get_player_name() == self._driver then
if math.abs(vel.x + vel.z) > 7 then
return
end
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end
local punch_dir = mcl_minecarts:velocity_to_dir(puncher:get_look_dir())
punch_dir.y = 0
local cart_dir = mcl_minecarts:get_rail_direction(pos, punch_dir, nil, nil, self._railtype)
if vector.equals(cart_dir, {x=0, y=0, z=0}) then
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return
end
time_from_last_punch = math.min(time_from_last_punch, tool_capabilities.full_punch_interval)
local f = 3 * (time_from_last_punch / tool_capabilities.full_punch_interval)
self._velocity = vector.multiply(cart_dir, f)
self._old_pos = nil
self._punched = true
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end
function cart:on_step(dtime)
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local vel = self.object:get_velocity()
local update = {}
if self._last_float_check == nil then
self._last_float_check = 0
else
self._last_float_check = self._last_float_check + dtime
end
local pos, rou_pos, node
-- Drop minecart if it isn't on a rail anymore
if self._last_float_check >= mcl_minecarts.check_float_time then
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pos = self.object:get_pos()
rou_pos = vector.round(pos)
node = minetest.get_node(rou_pos)
local g = minetest.get_item_group(node.name, "connect_to_raillike")
if g ~= self._railtype and self._railtype ~= nil then
-- Detach driver
if self._driver then
if self._old_pos then
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self.object:set_pos(self._old_pos)
end
mcl_player.player_attached[self._driver] = nil
local player = minetest.get_player_by_name(self._driver)
if player then
player:set_detach()
player:set_eye_offset({x=0, y=0, z=0},{x=0, y=0, z=0})
end
end
-- Drop items and remove cart entity
if not minetest.settings:get_bool("creative_mode") then
for d=1, #drop do
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minetest.add_item(self.object:get_pos(), drop[d])
end
end
self.object:remove()
return
end
self._last_float_check = 0
end
if self._punched then
vel = vector.add(vel, self._velocity)
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self.object:set_velocity(vel)
self._old_dir.y = 0
elseif vector.equals(vel, {x=0, y=0, z=0}) then
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return
end
local dir, last_switch = nil, nil
if not pos then
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pos = self.object:get_pos()
end
if self._old_pos and not self._punched then
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local flo_pos = vector.floor(pos)
local flo_old = vector.floor(self._old_pos)
if vector.equals(flo_pos, flo_old) then
return
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-- Prevent querying the same node over and over again
end
if not rou_pos then
rou_pos = vector.round(pos)
end
rou_old = vector.round(self._old_pos)
if not node then
node = minetest.get_node(rou_pos)
end
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local node_old = minetest.get_node(rou_old)
-- Update detector rails
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if node.name == "mcl_minecarts:detector_rail" then
local newnode = {name="mcl_minecarts:detector_rail_on", param2 = node.param2}
minetest.swap_node(rou_pos, newnode)
mesecon.receptor_on(rou_pos)
end
if node_old.name == "mcl_minecarts:detector_rail_on" then
local newnode = {name="mcl_minecarts:detector_rail", param2 = node_old.param2}
minetest.swap_node(rou_old, newnode)
mesecon.receptor_off(rou_old)
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end
end
local ctrl, player = nil, nil
if self._driver then
player = minetest.get_player_by_name(self._driver)
if player then
ctrl = player:get_player_control()
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end
end
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-- Stop cart if velocity vector flips
if self._old_vel and self._old_vel.y == 0 and
(self._old_vel.x * vel.x < 0 or self._old_vel.z * vel.z < 0) then
self._old_vel = {x = 0, y = 0, z = 0}
self._old_pos = pos
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self.object:set_velocity(vector.new())
self.object:set_acceleration(vector.new())
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return
end
self._old_vel = vector.new(vel)
if self._old_pos then
local diff = vector.subtract(self._old_pos, pos)
for _,v in ipairs({"x","y","z"}) do
if math.abs(diff[v]) > 1.1 then
local expected_pos = vector.add(self._old_pos, self._old_dir)
dir, last_switch = mcl_minecarts:get_rail_direction(pos, self._old_dir, ctrl, self._old_switch, self._railtype)
if vector.equals(dir, {x=0, y=0, z=0}) then
dir = false
pos = vector.new(expected_pos)
update.pos = true
end
break
end
end
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end
if vel.y == 0 then
for _,v in ipairs({"x", "z"}) do
if vel[v] ~= 0 and math.abs(vel[v]) < 0.9 then
vel[v] = 0
update.vel = true
end
end
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end
local cart_dir = mcl_minecarts:velocity_to_dir(vel)
local max_vel = mcl_minecarts.speed_max
if not dir then
dir, last_switch = mcl_minecarts:get_rail_direction(pos, cart_dir, ctrl, self._old_switch, self._railtype)
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end
local new_acc = {x=0, y=0, z=0}
if vector.equals(dir, {x=0, y=0, z=0}) then
vel = {x=0, y=0, z=0}
update.vel = true
else
-- If the direction changed
if dir.x ~= 0 and self._old_dir.z ~= 0 then
vel.x = dir.x * math.abs(vel.z)
vel.z = 0
pos.z = math.floor(pos.z + 0.5)
update.pos = true
end
if dir.z ~= 0 and self._old_dir.x ~= 0 then
vel.z = dir.z * math.abs(vel.x)
vel.x = 0
pos.x = math.floor(pos.x + 0.5)
update.pos = true
end
-- Up, down?
if dir.y ~= self._old_dir.y then
vel.y = dir.y * math.abs(vel.x + vel.z)
pos = vector.round(pos)
update.pos = true
end
-- Slow down or speed up
local acc = dir.y * -1.8
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local speed_mod = minetest.registered_nodes[minetest.get_node(pos).name]._rail_acceleration
if speed_mod and speed_mod ~= 0 then
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acc = acc + speed_mod
else
acc = acc - 0.4
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end
new_acc = vector.multiply(dir, acc)
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end
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self.object:set_acceleration(new_acc)
self._old_pos = vector.new(pos)
self._old_dir = vector.new(dir)
self._old_switch = last_switch
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-- Limits
for _,v in ipairs({"x","y","z"}) do
if math.abs(vel[v]) > max_vel then
vel[v] = mcl_minecarts:get_sign(vel[v]) * max_vel
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new_acc[v] = 0
update.vel = true
end
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end
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-- Give achievement when player reached a distance of 1000 nodes from the start position
if self._driver and (vector.distance(self._start_pos, pos) >= 1000) then
awards.unlock(self._driver, "mcl:onARail")
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end
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if update.pos or self._punched then
local yaw = 0
if dir.x < 0 then
yaw = 0.5
elseif dir.x > 0 then
yaw = 1.5
elseif dir.z < 0 then
yaw = 1
end
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self.object:set_yaw(yaw * math.pi)
end
if self._punched then
self._punched = false
end
if not (update.vel or update.pos) then
return
end
local anim = {x=0, y=0}
if dir.y == -1 then
anim = {x=1, y=1}
elseif dir.y == 1 then
anim = {x=2, y=2}
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end
self.object:set_animation(anim, 1, 0)
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self.object:set_velocity(vel)
if update.pos then
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self.object:set_pos(pos)
end
update = nil
end
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function cart:get_staticdata()
return minetest.serialize({_railtype = self._railtype})
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end
minetest.register_entity(entity_id, cart)
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end
-- Place a minecart at pointed_thing
mcl_minecarts.place_minecart = function(itemstack, pointed_thing)
if not pointed_thing.type == "node" then
return
end
local railpos, node
if mcl_minecarts:is_rail(pointed_thing.under) then
railpos = pointed_thing.under
node = minetest.get_node(pointed_thing.under)
elseif mcl_minecarts:is_rail(pointed_thing.above) then
railpos = pointed_thing.above
node = minetest.get_node(pointed_thing.above)
else
return
end
-- Activate detector rail
if node.name == "mcl_minecarts:detector_rail" then
local newnode = {name="mcl_minecarts:detector_rail_on", param2 = node.param2}
minetest.swap_node(railpos, newnode)
mesecon.receptor_on(railpos)
end
local entity_id = entity_mapping[itemstack:get_name()]
local cart = minetest.add_entity(railpos, entity_id)
local railtype = minetest.get_item_group(node.name, "connect_to_raillike")
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local le = cart:get_luaentity()
if le ~= nil then
le._railtype = railtype
end
local cart_dir = mcl_minecarts:get_rail_direction(railpos, {x=1, y=0, z=0}, nil, nil, railtype)
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cart:set_yaw(minetest.dir_to_yaw(cart_dir))
if not minetest.settings:get_bool("creative_mode") then
itemstack:take_item()
end
return itemstack
end
local register_craftitem = function(itemstring, entity_id, description, longdesc, usagehelp, icon, creative)
entity_mapping[itemstring] = entity_id
local groups = { minecart = 1, transport = 1 }
if creative == false then
groups.not_in_creative_inventory = 1
end
local def = {
stack_max = 1,
on_place = function(itemstack, placer, pointed_thing)
if not pointed_thing.type == "node" then
return
end
-- Call on_rightclick if the pointed node defines it
local node = minetest.get_node(pointed_thing.under)
if placer and not placer:get_player_control().sneak then
if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
end
end
return mcl_minecarts.place_minecart(itemstack, pointed_thing)
end,
_on_dispense = function(stack, pos, droppos, dropnode, dropdir)
-- Place minecart as entity on rail. If there's no rail, just drop it.
local placed
if minetest.get_item_group(dropnode.name, "rail") ~= 0 then
-- FIXME: This places minecarts even if the spot is already occupied
local pointed_thing = { under = droppos, above = { x=droppos.x, y=droppos.y+1, z=droppos.z } }
placed = mcl_minecarts.place_minecart(stack, pointed_thing)
end
if placed == nil then
-- Drop item
minetest.add_item(droppos, stack)
end
end,
groups = groups,
}
def.description = description
def._doc_items_longdesc = longdesc
def._doc_items_usagehelp = usagehelp
def.inventory_image = icon
def.wield_image = icon
minetest.register_craftitem(itemstring, def)
end
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--[[
Register a minecart
* itemstring: Itemstring of minecart item
* entity_id: ID of minecart entity
* description: Item name / description
* longdesc: Long help text
* usagehelp: Usage help text
* mesh: Minecart mesh
* textures: Minecart textures table
* icon: Item icon
* drop: Dropped items after destroying minecart
* on_rightclick: Called after rightclick
* on_activate_by_rail: Called when above activator rail
* creative: If false, don't show in Creative Inventory
]]
local function register_minecart(itemstring, entity_id, description, longdesc, usagehelp, mesh, textures, icon, drop, on_rightclick, on_activate_by_rail, creative)
register_entity(entity_id, mesh, textures, drop, on_rightclick)
register_craftitem(itemstring, entity_id, description, longdesc, usagehelp, icon, creative)
if minetest.get_modpath("doc_identifier") ~= nil then
doc.sub.identifier.register_object(entity_id, "craftitems", itemstring)
end
end
-- Minecart
register_minecart(
"mcl_minecarts:minecart",
"mcl_minecarts:minecart",
S("Minecart"),
S("Minecarts can be used for a quick transportion on rails.") .. "\n" ..
S("Minecarts only ride on rails and always follow the tracks. At a T-junction with no straight way ahead, they turn left. The speed is affected by the rail type."),
S("You can place the minecart on rails. Right-click it to enter it. Punch it to get it moving.") .. "\n" ..
S("To obtain the minecart, punch it while holding down the sneak key."),
"mcl_minecarts_minecart.b3d",
{"mcl_minecarts_minecart.png"},
"mcl_minecarts_minecart_normal.png",
{"mcl_minecarts:minecart"},
function(self, clicker)
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local name = clicker:get_player_name()
if not clicker or not clicker:is_player() then
return
end
local player_name = clicker:get_player_name()
if self._driver and player_name == self._driver then
self._driver = nil
self._start_pos = nil
clicker:set_detach()
clicker:set_eye_offset({x=0, y=0, z=0},{x=0, y=0, z=0})
mcl_player.player_set_animation(clicker, "stand" , 30)
elseif not self._driver then
self._driver = player_name
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self._start_pos = self.object:get_pos()
mcl_player.player_attached[player_name] = true
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clicker:set_attach(self.object, "", {x=0, y=-1.75, z=-2}, {x=0, y=0, z=0})
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mcl_player.player_attached[name] = true
minetest.after(0.2, function(name)
local player = minetest.get_player_by_name(name)
if player then
mcl_player.player_set_animation(player, "sit" , 30)
player:set_eye_offset({x=0, y=-5.5, z=0},{x=0, y=-4, z=0})
end
end, name)
end
end
)
-- Minecart with Chest
register_minecart(
"mcl_minecarts:chest_minecart",
"mcl_minecarts:chest_minecart",
S("Minecart with Chest"),
nil, nil,
"mcl_minecarts_minecart_chest.b3d",
{ "mcl_chests_normal.png", "mcl_minecarts_minecart.png" },
"mcl_minecarts_minecart_chest.png",
{"mcl_minecarts:minecart", "mcl_chests:chest"},
nil, nil, false)
-- Minecart with Furnace
register_minecart(
"mcl_minecarts:furnace_minecart",
"mcl_minecarts:furnace_minecart",
S("Minecart with Furnace"),
nil, nil,
"mcl_minecarts_minecart_block.b3d",
{
"default_furnace_top.png",
"default_furnace_top.png",
"default_furnace_front.png",
"default_furnace_side.png",
"default_furnace_side.png",
"default_furnace_side.png",
"mcl_minecarts_minecart.png",
},
"mcl_minecarts_minecart_furnace.png",
{"mcl_minecarts:minecart", "mcl_furnaces:furnace"},
-- Feed furnace with coal
function(self, clicker)
if not clicker or not clicker:is_player() then
return
end
if not self._fueltime then
self._fueltime = 0
end
local held = clicker:get_wielded_item()
if minetest.get_item_group(held:get_name(), "coal") == 1 then
self._fueltime = self._fueltime + 180
if not minetest.settings:get_bool("creative_mode") then
held:take_item()
local index = clicker:get_wielded_index()
local inv = clicker:get_inventory()
inv:set_stack("main", index, held)
end
-- DEBUG
minetest.chat_send_player(clicker:get_player_name(), "Fuel: " .. tostring(self._fueltime))
end
end, nil, false
)
-- Minecart with Command Block
register_minecart(
"mcl_minecarts:command_block_minecart",
"mcl_minecarts:command_block_minecart",
S("Minecart with Command Block"),
nil, nil,
"mcl_minecarts_minecart_block.b3d",
{
"jeija_commandblock_off.png^[verticalframe:2:0",
"jeija_commandblock_off.png^[verticalframe:2:0",
"jeija_commandblock_off.png^[verticalframe:2:0",
"jeija_commandblock_off.png^[verticalframe:2:0",
"jeija_commandblock_off.png^[verticalframe:2:0",
"jeija_commandblock_off.png^[verticalframe:2:0",
"mcl_minecarts_minecart.png",
},
"mcl_minecarts_minecart_command_block.png",
{"mcl_minecarts:minecart"},
nil, nil, false
)
-- Minecart with Hopper
register_minecart(
"mcl_minecarts:hopper_minecart",
"mcl_minecarts:hopper_minecart",
S("Minecart with Hopper"),
nil, nil,
"mcl_minecarts_minecart_hopper.b3d",
{
"mcl_hoppers_hopper_inside.png",
"mcl_minecarts_minecart.png",
"mcl_hoppers_hopper_outside.png",
"mcl_hoppers_hopper_top.png",
},
"mcl_minecarts_minecart_hopper.png",
{"mcl_minecarts:minecart", "mcl_hoppers:hopper"},
nil, nil, false
)
-- Minecart with TNT
register_minecart(
"mcl_minecarts:tnt_minecart",
"mcl_minecarts:tnt_minecart",
S("Minecart with TNT"),
nil, nil,
"mcl_minecarts_minecart_block.b3d",
{
"default_tnt_top.png",
"default_tnt_bottom.png",
"default_tnt_side.png",
"default_tnt_side.png",
"default_tnt_side.png",
"default_tnt_side.png",
"mcl_minecarts_minecart.png",
},
"mcl_minecarts_minecart_tnt.png",
{"mcl_minecarts:minecart", "mcl_tnt:tnt"},
nil, nil, false
)
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minetest.register_craft({
output = "mcl_minecarts:minecart",
recipe = {
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{"mcl_core:iron_ingot", "", "mcl_core:iron_ingot"},
{"mcl_core:iron_ingot", "mcl_core:iron_ingot", "mcl_core:iron_ingot"},
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},
})
-- TODO: Re-enable crafting of special minecarts when they have been implemented
if false then
minetest.register_craft({
output = "mcl_minecarts:hopper_minecart",
recipe = {
{"mcl_hoppers:hopper"},
{"mcl_minecarts:minecart"},
},
})
minetest.register_craft({
output = "mcl_minecarts:chest_minecart",
recipe = {
{"mcl_chests:chest"},
{"mcl_minecarts:minecart"},
},
})
minetest.register_craft({
output = "mcl_minecarts:tnt_minecart",
recipe = {
{"mcl_tnt:tnt"},
{"mcl_minecarts:minecart"},
},
})
minetest.register_craft({
output = "mcl_minecarts:furnace_minecart",
recipe = {
{"mcl_furnaces:furnace"},
{"mcl_minecarts:minecart"},
},
})
end