pipeworks/item_transport.lua
2015-01-29 21:59:35 +01:00

286 lines
8.3 KiB
Lua

function pipeworks.tube_item(pos, item)
error("obsolete pipeworks.tube_item() called; change caller to use pipeworks.tube_inject_item() instead")
end
function pipeworks.tube_inject_item(pos, start_pos, velocity, item)
-- Take item in any format
local stack = ItemStack(item)
local obj = luaentity.add_entity(pos, "pipeworks:tubed_item")
obj:set_item(stack:to_string())
obj.start_pos = vector.new(start_pos)
obj:setvelocity(velocity)
--obj:set_color("red") -- todo: this is test-only code
return obj
end
-- adding two tube functions
-- can_remove(pos,node,stack,dir) returns the maximum number of items of that stack that can be removed
-- remove_items(pos,node,stack,dir,count) removes count items and returns them
-- both optional w/ sensible defaults and fallback to normal allow_* function
-- XXX: possibly change insert_object to insert_item
local adjlist={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=0,y=1,z=0},{x=0,y=-1,z=0},{x=1,y=0,z=0},{x=-1,y=0,z=0}}
function pipeworks.notvel(tbl, vel)
local tbl2={}
for _,val in ipairs(tbl) do
if val.x ~= -vel.x or val.y ~= -vel.y or val.z ~= -vel.z then table.insert(tbl2, val) end
end
return tbl2
end
local function go_next(pos, velocity, stack)
local next_positions = {}
local max_priority = 0
local cnode = minetest.get_node(pos)
local cmeta = minetest.get_meta(pos)
local can_go
local speed = math.abs(velocity.x + velocity.y + velocity.z)
if speed == 0 then
speed = 1
end
local vel = {x = velocity.x/speed, y = velocity.y/speed, z = velocity.z/speed,speed=speed}
if speed >= 4.1 then
speed = 4
elseif speed >= 1.1 then
speed = speed - 0.1
else
speed = 1
end
vel.speed = speed
if minetest.registered_nodes[cnode.name] and minetest.registered_nodes[cnode.name].tube and minetest.registered_nodes[cnode.name].tube.can_go then
can_go = minetest.registered_nodes[cnode.name].tube.can_go(pos, cnode, vel, stack)
else
can_go = pipeworks.notvel(adjlist, vel)
end
for _, vect in ipairs(can_go) do
local npos = vector.add(pos, vect)
local node = minetest.get_node(npos)
local reg_node = minetest.registered_nodes[node.name]
if reg_node then
local tube_def = reg_node.tube
local tubedevice = minetest.get_item_group(node.name, "tubedevice")
local tube_priority = (tube_def and tube_def.priority) or 100
if tubedevice > 0 and tube_priority >= max_priority then
if not tube_def or not tube_def.can_insert or
tube_def.can_insert(npos, node, stack, vect) then
if tube_priority > max_priority then
max_priority = tube_priority
next_positions = {}
end
next_positions[#next_positions + 1] = {pos = npos, vect = vect}
end
end
end
end
if not next_positions[1] then
return false, nil
end
local n = (cmeta:get_int("tubedir") % (#next_positions)) + 1
if pipeworks.enable_cyclic_mode then
cmeta:set_int("tubedir", n)
end
local new_velocity = vector.multiply(next_positions[n].vect, vel.speed)
return true, new_velocity
end
minetest.register_entity("pipeworks:tubed_item", {
initial_properties = {
hp_max = 1,
physical = false,
collisionbox = {0.1, 0.1, 0.1, 0.1, 0.1, 0.1},
visual = "wielditem",
visual_size = {x = 0.15, y = 0.15},
textures = {""},
spritediv = {x = 1, y = 1},
initial_sprite_basepos = {x = 0, y = 0},
is_visible = false,
},
physical_state = false,
from_data = function(self, itemstring)
local stack = ItemStack(itemstring)
local itemtable = stack:to_table()
local itemname = nil
if itemtable then
itemname = stack:to_table().name
end
local item_texture = nil
local item_type = ""
if minetest.registered_items[itemname] then
item_texture = minetest.registered_items[itemname].inventory_image
item_type = minetest.registered_items[itemname].type
end
self.object:set_properties({
is_visible = true,
textures = {stack:get_name()}
})
local def = stack:get_definition()
self.object:setyaw((def and def.type == "node") and 0 or math.pi * 0.25)
end,
get_staticdata = luaentity.get_staticdata,
on_activate = function(self, staticdata) -- Legacy code, should be replaced later by luaentity.on_activate
if staticdata == "" or staticdata == nil then
return
end
if staticdata == "toremove" then
self.object:remove()
return
end
local item = minetest.deserialize(staticdata)
pipeworks.tube_inject_item(self.object:getpos(), item.start_pos, item.velocity, item.itemstring)
self.object:remove()
end,
})
minetest.register_entity("pipeworks:color_entity", {
initial_properties = {
hp_max = 1,
physical = false,
collisionbox = {0.1, 0.1, 0.1, 0.1, 0.1, 0.1},
visual = "cube",
visual_size = {x = 3.5, y = 3.5, z = 3.5}, -- todo: find correct size
textures = {""},
is_visible = false,
},
physical_state = false,
from_data = function(self, color)
local t = "pipeworks_color_"..color..".png"
local prop = {
is_visible = true,
visual = "cube",
textures = {t, t, t, t, t, t} -- todo: textures
}
self.object:set_properties(prop)
end,
get_staticdata = luaentity.get_staticdata,
on_activate = luaentity.on_activate,
})
luaentity.register_entity("pipeworks:tubed_item", {
itemstring = '',
item_entity = nil,
color_entity = nil,
color = nil,
start_pos = nil,
set_item = function(self, item)
local itemstring = ItemStack(item):to_string() -- Accept any input format
if self.itemstring == itemstring then
return
end
if self.item_entity then
self:remove_attached_entity(self.item_entity)
end
self.itemstring = itemstring
self.item_entity = self:add_attached_entity("pipeworks:tubed_item", itemstring)
end,
set_color = function(self, color)
if self.color == color then
return
end
self.color = color
if self.color_entity then
self:remove_attached_entity(self.color_entity)
end
if color then
self.color_entity = self:add_attached_entity("pipeworks:color_entity", color)
else
self.color_entity = nil
end
end,
on_step = function(self, dtime)
if self.start_pos == nil then
local pos = self:getpos()
self.start_pos = vector.round(pos)
self:setpos(pos)
end
local pos = self:getpos()
local stack = ItemStack(self.itemstring)
local drop_pos
local velocity = self:getvelocity()
local moved = false
local speed = math.abs(velocity.x + velocity.y + velocity.z)
if speed == 0 then
speed = 1
moved = true
end
local vel = {x = velocity.x / speed, y = velocity.y / speed, z = velocity.z / speed, speed = speed}
if vector.distance(pos, self.start_pos) >= 1 then
self.start_pos = vector.add(self.start_pos, vel)
moved = true
end
minetest.load_position(self.start_pos)
local node = minetest.get_node(self.start_pos)
if moved and minetest.get_item_group(node.name, "tubedevice_receiver") == 1 then
local leftover
if minetest.registered_nodes[node.name].tube and minetest.registered_nodes[node.name].tube.insert_object then
leftover = minetest.registered_nodes[node.name].tube.insert_object(self.start_pos, node, stack, vel)
else
leftover = stack
end
if leftover:is_empty() then
self:remove()
return
end
velocity = vector.multiply(velocity, -1)
self:setvelocity(velocity)
self:set_item(leftover:to_string())
return
end
if moved then
local found_next, new_velocity = go_next(self.start_pos, velocity, stack) -- todo: color
if not found_next then
drop_pos = minetest.find_node_near(vector.add(self.start_pos, velocity), 1, "air")
if drop_pos then
minetest.item_drop(stack, "", drop_pos)
self:remove()
return
end
end
if new_velocity and not vector.equals(velocity, new_velocity) then
self:setpos(self.start_pos)
self:setvelocity(new_velocity)
end
end
end
})
if minetest.get_modpath("mesecons_mvps") then
mesecon.register_mvps_unmov("pipeworks:tubed_item")
mesecon.register_mvps_unmov("pipeworks:color_entity")
mesecon.register_on_mvps_move(function(moved_nodes)
local moved = {}
for _, n in ipairs(moved_nodes) do
moved[minetest.hash_node_position(n.oldpos)] = vector.subtract(n.pos, n.oldpos)
end
for id, entity in pairs(luaentity.entities) do
if entity.name == "pipeworks:tubed_item" then
local pos = entity:getpos()
local rpos = vector.round(pos)
local dir = moved[minetest.hash_node_position(rpos)]
if dir then
entity:setpos(vector.add(pos, dir))
entity.start_pos = vector.add(entity.start_pos, dir)
end
end
end
end)
end