MineClone2/mods/mcl_minecarts/init.lua

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Lua
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mcl_minecarts = {}
mcl_minecarts.modpath = minetest.get_modpath("mcl_minecarts")
mcl_minecarts.speed_max = 10
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local vector_floor = function(v)
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return {
x = math.floor(v.x),
y = math.floor(v.y),
z = math.floor(v.z)
}
end
dofile(mcl_minecarts.modpath.."/functions.lua")
dofile(mcl_minecarts.modpath.."/rails.lua")
mcl_minecarts.cart = {
physical = false,
collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
visual = "mesh",
mesh = "cart.x",
visual_size = {x=1, y=1},
textures = {"cart.png"},
_driver = nil,
_punched = false, -- used to re-send _velocity and position
_velocity = {x=0, y=0, z=0}, -- only used on punch
_old_dir = {x=0, y=0, z=0},
_old_pos = nil,
_old_switch = 0,
_railtype = nil,
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}
function mcl_minecarts.cart:on_rightclick(clicker)
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
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clicker:set_detach()
elseif not self._driver then
self._driver = player_name
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mcl_core.player_attached[player_name] = true
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clicker:set_attach(self.object, "", {x=0, y=3, z=0}, {x=0, y=0, z=0})
end
end
function mcl_minecarts.cart:on_activate(staticdata, dtime_s)
self.object:set_armor_groups({immortal=1})
end
function mcl_minecarts.cart:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
local pos = self.object:getpos()
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")
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end
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)
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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
self.object:setpos(self._old_pos)
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end
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mcl_core.player_attached[self._driver] = nil
local player = minetest.get_player_by_name(self._driver)
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if player then
player:set_detach()
end
end
self.object:remove()
puncher:get_inventory():add_item("main", "mcl_minecarts:minecart")
return
end
local vel = self.object:getvelocity()
if puncher:get_player_name() == self._driver then
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if math.abs(vel.x + vel.z) > 7 then
return
end
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)
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if vector.equals(cart_dir, {x=0, y=0, z=0}) then
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 mcl_minecarts.cart:on_step(dtime)
local vel = self.object:getvelocity()
local update = {}
if self._punched then
vel = vector.add(vel, self._velocity)
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self.object:setvelocity(vel)
self._old_dir.y = 0
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elseif vector.equals(vel, {x=0, y=0, z=0}) then
return
end
local dir, last_switch = nil, nil
local pos = self.object:getpos()
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)
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if vector.equals(flo_pos, flo_old) then
return
end
end
local ctrl, player = nil, nil
if self._driver then
player = minetest.get_player_by_name(self._driver)
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if player then
ctrl = player:get_player_control()
end
end
if self._old_pos then
local diff = vector.subtract(self._old_pos, pos)
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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)
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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
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
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
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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
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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
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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
local speed_mod = tonumber(minetest.get_meta(pos):get_string("cart_acceleration"))
if speed_mod and speed_mod ~= 0 then
if speed_mod > 0 then
for _,v in ipairs({"x","y","z"}) do
if math.abs(vel[v]) >= max_vel then
speed_mod = 0
break
end
end
end
acc = acc + (speed_mod * 8)
else
acc = acc - 0.4
end
new_acc = vector.multiply(dir, acc)
end
self.object:setacceleration(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
update.vel = true
end
end
if self._punched then
self._punched = false
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end
if not (update.vel or update.pos) then
return
end
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
self.object:setyaw(yaw * math.pi)
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}
end
self.object:set_animation(anim, 1, 0)
self.object:setvelocity(vel)
if update.pos then
self.object:setpos(pos)
end
update = nil
end
minetest.register_entity("mcl_minecarts:minecart", mcl_minecarts.cart)
minetest.register_craftitem("mcl_minecarts:minecart", {
description = "Minecart",
inventory_image = minetest.inventorycube("cart_top.png", "cart_side.png", "cart_side.png"),
wield_image = "cart_side.png",
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stack_max = 1,
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on_place = function(itemstack, placer, pointed_thing)
if not pointed_thing.type == "node" then
return
end
if mcl_minecarts:is_rail(pointed_thing.under) then
minetest.add_entity(pointed_thing.under, "mcl_minecarts:minecart")
elseif mcl_minecarts:is_rail(pointed_thing.above) then
minetest.add_entity(pointed_thing.above, "mcl_minecarts:minecart")
else return end
itemstack:take_item()
return itemstack
end,
groups = { minecart = 1, transport = 1},
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})
minetest.register_craft({
output = "mcl_minecarts:minecart",
recipe = {
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{"mcl_core:steel_ingot", "", "mcl_core:steel_ingot"},
{"mcl_core:steel_ingot", "mcl_core:steel_ingot", "mcl_core:steel_ingot"},
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},
})