pipeworks/item_transport.lua

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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)
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-- Take item in any format
local stack = ItemStack(item)
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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
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return obj
end
Multiple updates: 1) Refactor autoplace, There was a lot of redundant code and like a dozen unneccessary string scans for every node next to every tube placed! I put it all into indexed tables and loops instead of bizarre and unexplainable variable names and copy and pasted code. There was also no support for notifying a chest when an item has been taken from it by a filter, so I added something for that. I also thought it prudent to fall back on the allow_metadata_inventory_take function should a special can_remove not exist. In fact if can_insert doesn't exist, it calls allow_metadata_inventory_put instead. I also added a thing for allowing pipes to attach to nodes of other modules, without having to hard code type all those node names into autoplace.lua. Basically node.tube.collects(i,param2) and i is the direction from the pipe and param2 is the param2 of what it's pointing at. I also abstracted the inscrutable correlation between i and param2 by trial and error (and the paramwand mod) into understandable functions. There was no pipeworks namespace so I created it, and put these functions into pipeworks.collects (as distinguished from a node.tube.collects function, which uses those functions) And now it's too late to cart my old clothes to the thrift store, dangit. 2) My "node.tube.collects" idea might be redundant with the node.tube.connect_sides thing, though possibly more versatile so I'll leave it in. 3) I was using node.tube.connects and fancy functions for checking if it's the sides or top or whatnot, and this connect_side thing came in. This should make both my way and the way using connect_side work. Also removed some debugging cruft
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-- adding two tube functions
-- can_remove(pos,node,stack,dir) returns the maximum number of items of that stack that can be removed
Multiple updates: 1) Refactor autoplace, There was a lot of redundant code and like a dozen unneccessary string scans for every node next to every tube placed! I put it all into indexed tables and loops instead of bizarre and unexplainable variable names and copy and pasted code. There was also no support for notifying a chest when an item has been taken from it by a filter, so I added something for that. I also thought it prudent to fall back on the allow_metadata_inventory_take function should a special can_remove not exist. In fact if can_insert doesn't exist, it calls allow_metadata_inventory_put instead. I also added a thing for allowing pipes to attach to nodes of other modules, without having to hard code type all those node names into autoplace.lua. Basically node.tube.collects(i,param2) and i is the direction from the pipe and param2 is the param2 of what it's pointing at. I also abstracted the inscrutable correlation between i and param2 by trial and error (and the paramwand mod) into understandable functions. There was no pipeworks namespace so I created it, and put these functions into pipeworks.collects (as distinguished from a node.tube.collects function, which uses those functions) And now it's too late to cart my old clothes to the thrift store, dangit. 2) My "node.tube.collects" idea might be redundant with the node.tube.connect_sides thing, though possibly more versatile so I'll leave it in. 3) I was using node.tube.connects and fancy functions for checking if it's the sides or top or whatnot, and this connect_side thing came in. This should make both my way and the way using connect_side work. Also removed some debugging cruft
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-- 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}}
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function pipeworks.notvel(tbl, vel)
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local tbl2={}
for _,val in ipairs(tbl) do
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if val.x ~= -vel.x or val.y ~= -vel.y or val.z ~= -vel.z then table.insert(tbl2, val) end
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end
return tbl2
end
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local function go_next(pos, velocity, stack)
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local next_positions = {}
local max_priority = 0
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local cnode = minetest.get_node(pos)
local cmeta = minetest.get_meta(pos)
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local can_go
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local speed = math.abs(velocity.x + velocity.y + velocity.z)
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if speed == 0 then
speed = 1
end
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local vel = {x = velocity.x/speed, y = velocity.y/speed, z = velocity.z/speed,speed=speed}
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if speed >= 4.1 then
speed = 4
elseif speed >= 1.1 then
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speed = speed - 0.1
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else
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speed = 1
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end
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vel.speed = speed
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if minetest.registered_nodes[cnode.name] and minetest.registered_nodes[cnode.name].tube and minetest.registered_nodes[cnode.name].tube.can_go then
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can_go = minetest.registered_nodes[cnode.name].tube.can_go(pos, cnode, vel, stack)
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else
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can_go = pipeworks.notvel(adjlist, vel)
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end
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for _, vect in ipairs(can_go) do
local npos = vector.add(pos, vect)
minetest.load_position(npos)
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local node = minetest.get_node(npos)
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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}
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end
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end
end
end
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if not next_positions[1] then
return false, nil
end
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local n = (cmeta:get_int("tubedir") % (#next_positions)) + 1
if pipeworks.enable_cyclic_mode then
cmeta:set_int("tubedir", n)
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end
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local new_velocity = vector.multiply(next_positions[n].vect, vel.speed)
return true, new_velocity
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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,
},
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physical_state = false,
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from_data = function(self, itemstring)
local stack = ItemStack(itemstring)
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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,
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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,
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get_staticdata = luaentity.get_staticdata,
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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)
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self.object:remove()
end,
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})
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,
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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
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if self.item_entity then
self:remove_attached_entity(self.item_entity)
end
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self.itemstring = itemstring
self.item_entity = self:add_attached_entity("pipeworks:tubed_item", itemstring)
end,
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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
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local pos = self:getpos()
self.start_pos = vector.round(pos)
self:setpos(pos)
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end
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local pos = self:getpos()
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local stack = ItemStack(self.itemstring)
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local drop_pos
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local velocity = self:getvelocity()
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local moved = false
local speed = math.abs(velocity.x + velocity.y + velocity.z)
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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}
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if vector.distance(pos, self.start_pos) >= 1 then
self.start_pos = vector.add(self.start_pos, vel)
moved = true
end
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minetest.load_position(self.start_pos)
local node = minetest.get_node(self.start_pos)
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if moved and minetest.get_item_group(node.name, "tubedevice_receiver") == 1 then
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local leftover
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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()
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return
end
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velocity = vector.multiply(velocity, -1)
self:setvelocity(velocity)
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self:set_item(leftover:to_string())
return
end
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if moved then
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local found_next, new_velocity = go_next(self.start_pos, velocity, stack) -- todo: color
if not found_next then
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drop_pos = minetest.find_node_near(vector.add(self.start_pos, velocity), 1, "air")
if drop_pos then
minetest.item_drop(stack, nil, drop_pos)
self:remove()
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return
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end
end
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if new_velocity and not vector.equals(velocity, new_velocity) then
self:setpos(self.start_pos)
self:setvelocity(new_velocity)
end
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end
end
})
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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)
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local moved = {}
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for _, n in ipairs(moved_nodes) do
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moved[minetest.hash_node_position(n.oldpos)] = vector.subtract(n.pos, n.oldpos)
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end
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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
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end
end
end)
end