403 lines
13 KiB
Lua
403 lines
13 KiB
Lua
local luaentity = pipeworks.luaentity
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local enable_max_limit = minetest.settings:get("pipeworks_enable_items_per_tube_limit")
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local max_tube_limit = tonumber(minetest.settings:get("pipeworks_max_items_per_tube")) or 30
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if enable_max_limit == nil then enable_max_limit = true end
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function pipeworks.tube_item(pos, item)
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error("obsolete pipeworks.tube_item() called; change caller to use pipeworks.tube_inject_item() instead")
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end
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function pipeworks.tube_inject_item(pos, start_pos, velocity, item, owner)
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-- Take item in any format
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local stack = ItemStack(item)
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local obj = luaentity.add_entity(pos, "pipeworks:tubed_item")
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obj:set_item(stack:to_string())
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obj.start_pos = vector.new(start_pos)
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obj:set_velocity(velocity)
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obj.owner = owner
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--obj:set_color("red") -- todo: this is test-only code
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return obj
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end
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-- adding two tube functions
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-- can_remove(pos,node,stack,dir) returns the maximum number of items of that stack that can be removed
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-- remove_items(pos,node,stack,dir,count) removes count items and returns them
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-- both optional w/ sensible defaults and fallback to normal allow_* function
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-- XXX: possibly change insert_object to insert_item
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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={}
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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
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return tbl2
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end
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local tube_item_count = {}
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minetest.register_globalstep(function(dtime)
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if not luaentity.entities then
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return
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end
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tube_item_count = {}
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for id, entity in pairs(luaentity.entities) do
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if entity.name == "pipeworks:tubed_item" then
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local h = minetest.hash_node_position(vector.round(entity._pos))
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tube_item_count[h] = (tube_item_count[h] or 0) + 1
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end
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end
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end)
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-- tube overload mechanism:
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-- when the tube's item count (tracked in the above tube_item_count table)
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-- exceeds the limit configured per tube, replace it with a broken one.
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local crunch_tube = function(pos, cnode, cmeta)
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if enable_max_limit then
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local h = minetest.hash_node_position(pos)
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local itemcount = tube_item_count[h] or 0
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if itemcount > max_tube_limit then
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cmeta:set_string("the_tube_was", minetest.serialize(cnode))
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print("[Pipeworks] Warning - a tube at "..minetest.pos_to_string(pos).." broke due to too many items ("..itemcount..")")
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minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
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pipeworks.scan_for_tube_objects(pos)
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end
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end
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end
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-- compatibility behaviour for the existing can_go() callbacks,
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-- which can only specify a list of possible positions.
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local function go_next_compat(pos, cnode, cmeta, cycledir, vel, stack, owner)
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local next_positions = {}
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local max_priority = 0
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local can_go
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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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-- can_go() is expected to return an array-like table of candidate offsets.
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-- for each one, look at the node at that offset and determine if it can accept the item.
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-- also note the prioritisation:
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-- if any tube is found with a greater priority than previously discovered,
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-- then the valid positions are reset and and subsequent positions under this are skipped.
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-- this has the effect of allowing only equal priorities to co-exist.
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for _, vect in ipairs(can_go) do
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local npos = vector.add(pos, vect)
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pipeworks.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]
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if reg_node then
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local tube_def = reg_node.tube
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local tubedevice = minetest.get_item_group(node.name, "tubedevice")
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local tube_priority = (tube_def and tube_def.priority) or 100
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if tubedevice > 0 and tube_priority >= max_priority then
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if not tube_def or not tube_def.can_insert or
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tube_def.can_insert(npos, node, stack, vect, owner) then
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if tube_priority > max_priority then
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max_priority = tube_priority
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next_positions = {}
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end
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next_positions[#next_positions + 1] = {pos = npos, vect = vect}
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end
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end
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end
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end
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-- indicate not found if no valid rules were picked up,
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-- and don't change the counter.
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if not next_positions[1] then
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return cycledir, false, nil, nil
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end
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-- otherwise rotate to the next output direction and return that
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local n = (cycledir % (#next_positions)) + 1
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local new_velocity = vector.multiply(next_positions[n].vect, vel.speed)
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return n, true, new_velocity, nil
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end
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-- function called by the on_step callback of the pipeworks tube luaentity.
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-- the routine is passed the current node position, velocity, itemstack,
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-- and owner name.
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-- returns three values:
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-- * a boolean "found destination" status;
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-- * a new velocity vector that the tubed item should use, or nil if not found;
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-- * a "multi-mode" data table (or nil if N/A) where a stack was split apart.
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-- if this is not nil, the luaentity spawns new tubed items for each new fragment stack,
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-- then deletes itself (i.e. the original item stack).
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local function go_next(pos, velocity, stack, owner)
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local cnode = minetest.get_node(pos)
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local cmeta = minetest.get_meta(pos)
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local speed = math.abs(velocity.x + velocity.y + velocity.z)
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if speed == 0 then
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speed = 1
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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
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speed = 4
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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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crunch_tube(pos, cnode, cmeta)
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-- cycling of outputs:
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-- an integer counter is kept in each pipe's metadata,
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-- which allows tracking which output was previously chosen.
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-- note reliance on get_int returning 0 for uninitialised.
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local cycledir = cmeta:get_int("tubedir")
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-- pulled out and factored out into go_next_compat() above.
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-- n is the new value of the cycle counter.
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-- XXX: this probably needs cleaning up after being split out,
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-- seven args is a bit too many
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local n, found, new_velocity, multimode = go_next_compat(pos, cnode, cmeta, cycledir, vel, stack, owner)
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-- if not using output cycling,
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-- don't update the field so it stays the same for the next item.
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if pipeworks.enable_cyclic_mode then
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cmeta:set_int("tubedir", n)
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end
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return found, new_velocity, multimode
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end
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minetest.register_entity("pipeworks:tubed_item", {
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initial_properties = {
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hp_max = 1,
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physical = false,
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collisionbox = {0.1, 0.1, 0.1, 0.1, 0.1, 0.1},
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visual = "wielditem",
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visual_size = {x = 0.15, y = 0.15},
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textures = {""},
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spritediv = {x = 1, y = 1},
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initial_sprite_basepos = {x = 0, y = 0},
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is_visible = false,
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},
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physical_state = false,
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from_data = function(self, itemstring)
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local stack = ItemStack(itemstring)
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local itemtable = stack:to_table()
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local itemname = nil
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if itemtable then
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itemname = stack:to_table().name
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end
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local item_texture = nil
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local item_type = ""
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if minetest.registered_items[itemname] then
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item_texture = minetest.registered_items[itemname].inventory_image
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item_type = minetest.registered_items[itemname].type
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end
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self.object:set_properties({
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is_visible = true,
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textures = {stack:get_name()}
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})
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local def = stack:get_definition()
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self.object:set_yaw((def and def.type == "node") and 0 or math.pi * 0.25)
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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
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if staticdata == "" or staticdata == nil then
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return
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end
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if staticdata == "toremove" then
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self.object:remove()
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return
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end
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local item = minetest.deserialize(staticdata)
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pipeworks.tube_inject_item(self.object:get_pos(), item.start_pos, item.velocity, item.itemstring)
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self.object:remove()
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end,
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})
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minetest.register_entity("pipeworks:color_entity", {
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initial_properties = {
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hp_max = 1,
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physical = false,
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collisionbox = {0.1, 0.1, 0.1, 0.1, 0.1, 0.1},
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visual = "cube",
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visual_size = {x = 3.5, y = 3.5, z = 3.5}, -- todo: find correct size
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textures = {""},
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is_visible = false,
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},
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physical_state = false,
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from_data = function(self, color)
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local t = "pipeworks_color_"..color..".png"
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local prop = {
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is_visible = true,
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visual = "cube",
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textures = {t, t, t, t, t, t} -- todo: textures
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}
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self.object:set_properties(prop)
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end,
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get_staticdata = luaentity.get_staticdata,
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on_activate = luaentity.on_activate,
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})
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-- see below for usage:
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-- determine if go_next returned a multi-mode set.
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local is_multimode = function(v)
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return (type(v) == "table") and (v.__multimode)
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end
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luaentity.register_entity("pipeworks:tubed_item", {
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itemstring = '',
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item_entity = nil,
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color_entity = nil,
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color = nil,
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start_pos = nil,
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set_item = function(self, item)
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local itemstring = ItemStack(item):to_string() -- Accept any input format
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if self.itemstring == itemstring then
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return
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end
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if self.item_entity then
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self:remove_attached_entity(self.item_entity)
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end
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self.itemstring = itemstring
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self.item_entity = self:add_attached_entity("pipeworks:tubed_item", itemstring)
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end,
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set_color = function(self, color)
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if self.color == color then
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return
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end
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self.color = color
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if self.color_entity then
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self:remove_attached_entity(self.color_entity)
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end
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if color then
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self.color_entity = self:add_attached_entity("pipeworks:color_entity", color)
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else
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self.color_entity = nil
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end
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end,
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on_step = function(self, dtime)
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local pos = self:get_pos()
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if self.start_pos == nil then
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self.start_pos = vector.round(pos)
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self:set_pos(pos)
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end
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local stack = ItemStack(self.itemstring)
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local velocity = self:get_velocity()
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local moved = false
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local speed = math.abs(velocity.x + velocity.y + velocity.z)
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if speed == 0 then
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speed = 1
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moved = true
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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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local moved_by = vector.distance(pos, self.start_pos)
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if moved_by >= 1 then
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self.start_pos = vector.add(self.start_pos, vel)
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moved = true
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end
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pipeworks.load_position(self.start_pos)
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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
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leftover = minetest.registered_nodes[node.name].tube.insert_object(self.start_pos, node, stack, vel, self.owner)
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else
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leftover = stack
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end
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if leftover:is_empty() then
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self:remove()
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return
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end
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velocity = vector.multiply(velocity, -1)
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self:set_pos(vector.subtract(self.start_pos, vector.multiply(vel, moved_by - 1)))
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self:set_velocity(velocity)
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self:set_item(leftover:to_string())
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return
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end
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if moved then
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local found_next, new_velocity, multimode = go_next(self.start_pos, velocity, stack, self.owner) -- todo: color
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local rev_vel = vector.multiply(velocity, -1)
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local rev_dir = vector.direction(self.start_pos,vector.add(self.start_pos,rev_vel))
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local rev_node = minetest.get_node(vector.round(vector.add(self.start_pos,rev_dir)))
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local tube_present = minetest.get_item_group(rev_node.name,"tubedevice") == 1
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if not found_next then
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if pipeworks.drop_on_routing_fail or not tube_present or
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minetest.get_item_group(rev_node.name,"tube") ~= 1 then
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-- Using add_item instead of item_drop since this makes pipeworks backward
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-- compatible with Minetest 0.4.13.
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-- Using item_drop here makes Minetest 0.4.13 crash.
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local dropped_item = minetest.add_item(self.start_pos, stack)
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if dropped_item then
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dropped_item:set_velocity(vector.multiply(velocity, 5))
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self:remove()
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end
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return
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else
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velocity = vector.multiply(velocity, -1)
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self:set_pos(vector.subtract(self.start_pos, vector.multiply(vel, moved_by - 1)))
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self:set_velocity(velocity)
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end
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elseif is_multimode(multimode) then
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-- create new stacks according to returned data.
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local s = self.start_pos
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for _, split in ipairs(multimode) do
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pipeworks.tube_inject_item(s, s, split.velocity, split.itemstack, self.owner)
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end
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-- remove ourself now the splits are sent
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self:remove()
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return
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end
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if new_velocity and not vector.equals(velocity, new_velocity) then
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local nvelr = math.abs(new_velocity.x + new_velocity.y + new_velocity.z)
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self:set_pos(vector.add(self.start_pos, vector.multiply(new_velocity, (moved_by - 1) / nvelr)))
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self:set_velocity(new_velocity)
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end
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end
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end
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})
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if minetest.get_modpath("mesecons_mvps") then
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mesecon.register_mvps_unmov("pipeworks:tubed_item")
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mesecon.register_mvps_unmov("pipeworks:color_entity")
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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
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if entity.name == "pipeworks:tubed_item" then
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local pos = entity:get_pos()
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local rpos = vector.round(pos)
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local dir = moved[minetest.hash_node_position(rpos)]
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if dir then
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entity:set_pos(vector.add(pos, dir))
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entity.start_pos = vector.add(entity.start_pos, dir)
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end
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end
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end
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end)
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end
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