carts/init.lua

596 lines
16 KiB
Lua

dofile(minetest.get_modpath("carts").."/functions.lua")
--
-- Cart entity
--
local 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,
velocity = {x=0, y=0, z=0},
old_pos = nil,
old_velocity = nil,
pre_stop_dir = nil,
MAX_V = 8, -- Limit of the velocity
}
function cart:on_rightclick(clicker)
if not clicker or not clicker:is_player() then
return
end
if self.driver and clicker == self.driver then
self.driver = nil
clicker:set_detach()
elseif not self.driver then
self.driver = clicker
clicker:set_attach(self.object, "", {x=0,y=5,z=0}, {x=0,y=0,z=0})
end
end
function cart:on_activate(staticdata, dtime_s)
self.object:set_armor_groups({immortal=1})
if staticdata then
local tmp = minetest.deserialize(staticdata)
if tmp then
self.velocity = tmp.velocity
end
if tmp and tmp.pre_stop_dir then
self.pre_stop_dir = tmp.pre_stop_dir
end
end
self.old_pos = self.object:getpos()
self.old_velocity = self.velocity
end
function cart:get_staticdata()
return minetest.serialize({
velocity = self.velocity,
pre_stop_dir = self.pre_stop_dir,
})
end
-- Remove the cart if holding a tool or accelerate it
function cart:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
if not puncher or not puncher:is_player() then
return
end
if puncher:get_player_control().sneak then
self.object:remove()
local inv = puncher:get_inventory()
if minetest.setting_getbool("creative_mode") then
if not inv:contains_item("main", "carts:cart") then
inv:add_item("main", "carts:cart")
end
else
inv:add_item("main", "carts:cart")
end
return
end
if puncher == self.driver then
return
end
local d = cart_func:velocity_to_dir(direction)
local s = self.velocity
if time_from_last_punch > tool_capabilities.full_punch_interval then
time_from_last_punch = tool_capabilities.full_punch_interval
end
local f = 4*(time_from_last_punch/tool_capabilities.full_punch_interval)
local v = {x=s.x+d.x*f, y=s.y, z=s.z+d.z*f}
if math.abs(v.x) < 6 and math.abs(v.z) < 6 then
self.velocity = v
else
if math.abs(self.velocity.x) < 6 and math.abs(v.x) >= 6 then
self.velocity.x = 6*cart_func:get_sign(self.velocity.x)
end
if math.abs(self.velocity.z) < 6 and math.abs(v.z) >= 6 then
self.velocity.z = 6*cart_func:get_sign(self.velocity.z)
end
end
end
-- Returns the direction as a unit vector
function cart:get_rail_direction(pos, dir)
local d = cart_func.v3:copy(dir)
-- Check front
d.y = 0
local p = cart_func.v3:add(cart_func.v3:copy(pos), d)
if cart_func:is_rail(p) then
return d
end
-- Check downhill
d.y = -1
p = cart_func.v3:add(cart_func.v3:copy(pos), d)
if cart_func:is_rail(p) then
return d
end
-- Check uphill
d.y = 1
p = cart_func.v3:add(cart_func.v3:copy(pos), d)
if cart_func:is_rail(p) then
return d
end
d.y = 0
-- Check left and right
local view_dir
local other_dir
local a
if d.x == 0 and d.z ~= 0 then
view_dir = "z"
other_dir = "x"
if d.z < 0 then
a = {1, -1}
else
a = {-1, 1}
end
elseif d.z == 0 and d.x ~= 0 then
view_dir = "x"
other_dir = "z"
if d.x > 0 then
a = {1, -1}
else
a = {-1, 1}
end
else
return {x=0, y=0, z=0}
end
d[view_dir] = 0
d[other_dir] = a[1]
p = cart_func.v3:add(cart_func.v3:copy(pos), d)
if cart_func:is_rail(p) then
return d
end
d.y = -1
p = cart_func.v3:add(cart_func.v3:copy(pos), d)
if cart_func:is_rail(p) then
return d
end
d.y = 0
d[other_dir] = a[2]
p = cart_func.v3:add(cart_func.v3:copy(pos), d)
if cart_func:is_rail(p) then
return d
end
d.y = -1
p = cart_func.v3:add(cart_func.v3:copy(pos), d)
if cart_func:is_rail(p) then
return d
end
d.y = 0
return {x=0, y=0, z=0}
end
function cart:calc_rail_direction(pos, vel)
local velocity = cart_func.v3:copy(vel)
local p = cart_func.v3:copy(pos)
if cart_func:is_int(p.x) and cart_func:is_int(p.z) then
local dir = cart_func:velocity_to_dir(velocity)
local dir_old = cart_func.v3:copy(dir)
dir = self:get_rail_direction(cart_func.v3:round(p), dir)
local v = math.max(math.abs(velocity.x), math.abs(velocity.z))
velocity = {
x = v * dir.x,
y = v * dir.y,
z = v * dir.z,
}
if cart_func.v3:equal(velocity, {x=0, y=0, z=0}) and not cart_func:is_rail(p) then
-- First try this HACK
-- Move the cart on the rail if above or under it
if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=1, z=0})) and vel.y >= 0 then
p = cart_func.v3:add(p, {x=0, y=1, z=0})
return self:calc_rail_direction(p, vel)
end
if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=-1, z=0})) and vel.y <= 0 then
p = cart_func.v3:add(p, {x=0, y=-1, z=0})
return self:calc_rail_direction(p, vel)
end
-- Now the HACK gets really dirty
if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=2, z=0})) and vel.y >= 0 then
p = cart_func.v3:add(p, {x=0, y=1, z=0})
return self:calc_rail_direction(p, vel)
end
if cart_func:is_rail(cart_func.v3:add(p, {x=0, y=-2, z=0})) and vel.y <= 0 then
p = cart_func.v3:add(p, {x=0, y=-1, z=0})
return self:calc_rail_direction(p, vel)
end
return {x=0, y=0, z=0}, p
end
if not cart_func.v3:equal(dir, dir_old) then
return velocity, cart_func.v3:round(p)
end
end
return velocity, p
end
function cart:on_step(dtime)
local pos = self.object:getpos()
local dir = cart_func:velocity_to_dir(self.velocity)
if not cart_func.v3:equal(self.velocity, {x=0,y=0,z=0}) then
self.pre_stop_dir = cart_func:velocity_to_dir(self.velocity)
end
-- Stop the cart if the velocity is nearly 0
-- Only if on a flat railway
if dir.y == 0 then
if math.abs(self.velocity.x) < 0.1 and math.abs(self.velocity.z) < 0.1 then
-- Start the cart if powered from mesecons
local a = tonumber(minetest.env:get_meta(pos):get_string("cart_acceleration"))
if a and a ~= 0 then
if self.pre_stop_dir and cart_func.v3:equal(self:get_rail_direction(self.object:getpos(), self.pre_stop_dir), self.pre_stop_dir) then
self.velocity = {
x = self.pre_stop_dir.x * 0.2,
y = self.pre_stop_dir.y * 0.2,
z = self.pre_stop_dir.z * 0.2,
}
self.old_velocity = self.velocity
return
end
for _,y in ipairs({0,-1,1}) do
for _,z in ipairs({1,-1}) do
if cart_func.v3:equal(self:get_rail_direction(self.object:getpos(), {x=0, y=y, z=z}), {x=0, y=y, z=z}) then
self.velocity = {
x = 0,
y = 0.2*y,
z = 0.2*z,
}
self.old_velocity = self.velocity
return
end
end
for _,x in ipairs({1,-1}) do
if cart_func.v3:equal(self:get_rail_direction(self.object:getpos(), {x=x, y=y, z=0}), {x=x, y=y, z=0}) then
self.velocity = {
x = 0.2*x,
y = 0.2*y,
z = 0,
}
self.old_velocity = self.velocity
return
end
end
end
end
self.velocity = {x=0, y=0, z=0}
self.object:setvelocity(self.velocity)
self.old_velocity = self.velocity
self.old_pos = self.object:getpos()
return
end
end
--
-- Set the new moving direction
--
-- Recalcualte the rails that are passed since the last server step
local old_dir = cart_func:velocity_to_dir(self.old_velocity)
if old_dir.x ~= 0 then
local sign = cart_func:get_sign(pos.x-self.old_pos.x)
while true do
if sign ~= cart_func:get_sign(pos.x-self.old_pos.x) or pos.x == self.old_pos.x then
break
end
self.old_pos.x = self.old_pos.x + cart_func:get_sign(pos.x-self.old_pos.x)*0.1
self.old_pos.y = self.old_pos.y + cart_func:get_sign(pos.x-self.old_pos.x)*0.1*old_dir.y
self.old_velocity, self.old_pos = self:calc_rail_direction(self.old_pos, self.old_velocity)
old_dir = cart_func:velocity_to_dir(self.old_velocity)
if not cart_func.v3:equal(cart_func:velocity_to_dir(self.old_velocity), dir) then
self.velocity = self.old_velocity
pos = self.old_pos
self.object:setpos(self.old_pos)
break
end
end
elseif old_dir.z ~= 0 then
local sign = cart_func:get_sign(pos.z-self.old_pos.z)
while true do
if sign ~= cart_func:get_sign(pos.z-self.old_pos.z) or pos.z == self.old_pos.z then
break
end
self.old_pos.z = self.old_pos.z + cart_func:get_sign(pos.z-self.old_pos.z)*0.1
self.old_pos.y = self.old_pos.y + cart_func:get_sign(pos.z-self.old_pos.z)*0.1*old_dir.y
self.old_velocity, self.old_pos = self:calc_rail_direction(self.old_pos, self.old_velocity)
old_dir = cart_func:velocity_to_dir(self.old_velocity)
if not cart_func.v3:equal(cart_func:velocity_to_dir(self.old_velocity), dir) then
self.velocity = self.old_velocity
pos = self.old_pos
self.object:setpos(self.old_pos)
break
end
end
end
-- Calculate the new step
self.velocity, pos = self:calc_rail_direction(pos, self.velocity)
self.object:setpos(pos)
dir = cart_func:velocity_to_dir(self.velocity)
-- Accelerate or decelerate the cart according to the pitch and acceleration of the rail node
local a = tonumber(minetest.env:get_meta(pos):get_string("cart_acceleration"))
if not a then
a = 0
end
if self.velocity.y < 0 then
self.velocity = {
x = self.velocity.x + (a+0.13)*cart_func:get_sign(self.velocity.x),
y = self.velocity.y + (a+0.13)*cart_func:get_sign(self.velocity.y),
z = self.velocity.z + (a+0.13)*cart_func:get_sign(self.velocity.z),
}
elseif self.velocity.y > 0 then
self.velocity = {
x = self.velocity.x + (a-0.1)*cart_func:get_sign(self.velocity.x),
y = self.velocity.y + (a-0.1)*cart_func:get_sign(self.velocity.y),
z = self.velocity.z + (a-0.1)*cart_func:get_sign(self.velocity.z),
}
else
self.velocity = {
x = self.velocity.x + (a-0.03)*cart_func:get_sign(self.velocity.x),
y = self.velocity.y + (a-0.03)*cart_func:get_sign(self.velocity.y),
z = self.velocity.z + (a-0.03)*cart_func:get_sign(self.velocity.z),
}
-- Place the cart exactly on top of the rail
if cart_func:is_rail(cart_func.v3:round(pos)) then
self.object:setpos({x=pos.x, y=math.floor(pos.y+0.5), z=pos.z})
pos = self.object:getpos()
end
end
-- Dont switch moving direction
-- Only if on flat railway
if dir.y == 0 then
if cart_func:get_sign(dir.x) ~= cart_func:get_sign(self.velocity.x) then
self.velocity.x = 0
end
if cart_func:get_sign(dir.y) ~= cart_func:get_sign(self.velocity.y) then
self.velocity.y = 0
end
if cart_func:get_sign(dir.z) ~= cart_func:get_sign(self.velocity.z) then
self.velocity.z = 0
end
end
-- Allow only one moving direction (multiply the other one with 0)
dir = cart_func:velocity_to_dir(self.velocity)
self.velocity = {
x = math.abs(self.velocity.x) * dir.x,
y = self.velocity.y,
z = math.abs(self.velocity.z) * dir.z,
}
-- Move cart exactly on the rail
if dir.x ~= 0 and not cart_func:is_int(pos.z) then
pos.z = math.floor(0.5+pos.z)
self.object:setpos(pos)
elseif dir.z ~= 0 and not cart_func:is_int(pos.x) then
pos.x = math.floor(0.5+pos.x)
self.object:setpos(pos)
end
-- Limit the velocity
if math.abs(self.velocity.x) > self.MAX_V then
self.velocity.x = self.MAX_V*cart_func:get_sign(self.velocity.x)
end
if math.abs(self.velocity.y) > self.MAX_V then
self.velocity.y = self.MAX_V*cart_func:get_sign(self.velocity.y)
end
if math.abs(self.velocity.z) > self.MAX_V then
self.velocity.z = self.MAX_V*cart_func:get_sign(self.velocity.z)
end
self.object:setvelocity(self.velocity)
self.old_pos = self.object:getpos()
self.old_velocity = cart_func.v3:copy(self.velocity)
if dir.x < 0 then
self.object:setyaw(math.pi/2)
elseif dir.x > 0 then
self.object:setyaw(3*math.pi/2)
elseif dir.z < 0 then
self.object:setyaw(math.pi)
elseif dir.z > 0 then
self.object:setyaw(0)
end
if dir.y == -1 then
self.object:set_animation({x=1, y=1}, 1, 0)
elseif dir.y == 1 then
self.object:set_animation({x=2, y=2}, 1, 0)
else
self.object:set_animation({x=0, y=0}, 1, 0)
end
end
minetest.register_entity("carts:cart", cart)
minetest.register_craftitem("carts:cart", {
description = "Minecart",
inventory_image = minetest.inventorycube("cart_top.png", "cart_side.png", "cart_side.png"),
wield_image = "cart_side.png",
on_place = function(itemstack, placer, pointed_thing)
if not pointed_thing.type == "node" then
return
end
if cart_func:is_rail(pointed_thing.under) then
minetest.env:add_entity(pointed_thing.under, "carts:cart")
if not minetest.setting_getbool("creative_mode") then
itemstack:take_item()
end
return itemstack
elseif cart_func:is_rail(pointed_thing.above) then
minetest.env:add_entity(pointed_thing.above, "carts:cart")
if not minetest.setting_getbool("creative_mode") then
itemstack:take_item()
end
return itemstack
end
end,
})
minetest.register_craft({
output = "carts:cart",
recipe = {
{"", "", ""},
{"default:steel_ingot", "", "default:steel_ingot"},
{"default:steel_ingot", "default:steel_ingot", "default:steel_ingot"},
},
})
--
-- Mesecon support
--
minetest.register_node(":default:rail", {
description = "Rail",
drawtype = "raillike",
tiles = {"default_rail.png", "default_rail_curved.png", "default_rail_t_junction.png", "default_rail_crossing.png"},
inventory_image = "default_rail.png",
wield_image = "default_rail.png",
paramtype = "light",
is_ground_content = true,
walkable = false,
selection_box = {
type = "fixed",
-- but how to specify the dimensions for curved and sideways rails?
fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
},
groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},
})
minetest.register_node("carts:powerrail", {
description = "Powered Rail",
drawtype = "raillike",
tiles = {"carts_rail_pwr.png", "carts_rail_curved_pwr.png", "carts_rail_t_junction_pwr.png", "carts_rail_crossing_pwr.png"},
inventory_image = "carts_rail_pwr.png",
wield_image = "carts_rail_pwr.png",
paramtype = "light",
is_ground_content = true,
walkable = false,
selection_box = {
type = "fixed",
-- but how to specify the dimensions for curved and sideways rails?
fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
},
groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},
after_place_node = function(pos, placer, itemstack)
if not mesecon then
minetest.env:get_meta(pos):set_string("cart_acceleration", "0.5")
end
end,
mesecons = {
effector = {
action_on = function(pos, node)
minetest.env:get_meta(pos):set_string("cart_acceleration", "0.5")
end,
action_off = function(pos, node)
minetest.env:get_meta(pos):set_string("cart_acceleration", "0")
end,
},
},
})
minetest.register_node("carts:brakerail", {
description = "Brake Rail",
drawtype = "raillike",
tiles = {"carts_rail_brk.png", "carts_rail_curved_brk.png", "carts_rail_t_junction_brk.png", "carts_rail_crossing_brk.png"},
inventory_image = "carts_rail_brk.png",
wield_image = "carts_rail_brk.png",
paramtype = "light",
is_ground_content = true,
walkable = false,
selection_box = {
type = "fixed",
-- but how to specify the dimensions for curved and sideways rails?
fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
},
groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},
after_place_node = function(pos, placer, itemstack)
if not mesecon then
minetest.env:get_meta(pos):set_string("cart_acceleration", "-0.2")
end
end,
mesecons = {
effector = {
action_on = function(pos, node)
minetest.env:get_meta(pos):set_string("cart_acceleration", "-0.2")
end,
action_off = function(pos, node)
minetest.env:get_meta(pos):set_string("cart_acceleration", "0")
end,
},
},
})
minetest.register_craft({
output = "carts:powerrail 2",
recipe = {
{"default:steel_ingot", "default:mese_crystal_fragment", "default:steel_ingot"},
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
{"default:steel_ingot", "", "default:steel_ingot"},
}
})
minetest.register_craft({
output = "carts:powerrail 2",
recipe = {
{"default:steel_ingot", "", "default:steel_ingot"},
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
{"default:steel_ingot", "default:mese_crystal_fragment", "default:steel_ingot"},
}
})
minetest.register_craft({
output = "carts:brakerail 2",
recipe = {
{"default:steel_ingot", "default:coal_lump", "default:steel_ingot"},
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
{"default:steel_ingot", "", "default:steel_ingot"},
}
})
minetest.register_craft({
output = "carts:brakerail 2",
recipe = {
{"default:steel_ingot", "", "default:steel_ingot"},
{"default:steel_ingot", "default:stick", "default:steel_ingot"},
{"default:steel_ingot", "default:coal_lump", "default:steel_ingot"},
}
})