317 lines
9.4 KiB
Lua
317 lines
9.4 KiB
Lua
-- Register tanks for each fluid
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fluidity.bucket_cache = {}
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fluidity.tanks = {}
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-- Get fluid source block name for bucket item.
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function fluidity.get_fluid_for_bucket(itemname)
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for i,v in pairs(fluidity.bucket_cache) do
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if v == itemname then
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return i
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end
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end
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end
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-- Get bucket item name for fluid source block.
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function fluidity.get_bucket_for_fluid(source)
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return fluidity.bucket_cache[source]
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end
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-- Ensure that this fluid node exists.
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function fluidity.get_fluid_node(name)
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return minetest.registered_nodes[name]
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end
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-- Get a nodedef field.
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local function get_nodedef_field(nodename, fieldname)
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if not minetest.registered_nodes[nodename] then
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return nil
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end
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return minetest.registered_nodes[nodename][fieldname]
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end
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-- Ensure that the node is a tank.
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function fluidity.tanks.get_is_tank(node)
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return minetest.get_item_group(node, "fluidity_tank") > 0
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end
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-- Ensure that the node is an empty tank.
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function fluidity.tanks.get_is_empty_tank(node)
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return minetest.get_item_group(node, "fluidity_tank_empty") > 0
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end
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-- Get tank data at position.
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-- Returns fluid name, fluid level, capacity, base tank name and the mod it was added from.
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-- Base tank name and mod name are used to construct different variants of this tank type.
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function fluidity.tanks.get_tank_at(pos)
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local meta = minetest.get_meta(pos)
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local node = minetest.get_node(pos)
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if not fluidity.tanks.get_is_tank(node.name) then return nil end
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local ffluid = get_nodedef_field(node.name, "fluidity_fluid")
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local fcapacity = get_nodedef_field(node.name, "_capacity")
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local fbasetank = get_nodedef_field(node.name, "_dataname")
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local fmod = get_nodedef_field(node.name, "_mod")
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local fluidcount = meta:get_int("fluid")
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return ffluid, fluidcount, fcapacity, fbasetank, fmod
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end
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-- Check to see if a fluid can go in the tank and pos.
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function fluidity.tanks.can_fluid_go_in_tank(pos, fluid)
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local fluid_name, count, capacity, base_tank, mod = fluidity.tanks.get_tank_at(pos)
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if not fluid_name then return true end
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if fluid_name ~= fluid then return false end
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if count == capacity then return false end
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local source_node = fluidity.get_fluid_node(fluid)
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local fluid_desc = fluidity.fluid_name(source_node.description)
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local shorthand_name = fluidity.fluid_short(fluid_desc)
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if not minetest.registered_nodes[mod..":"..base_tank.."_"..shorthand_name] then return false end
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return true
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end
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-- Fill the tank at pos with fluid.
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-- Overfilling means it will return an integer as the second variable that shows the amount over the capacity.
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function fluidity.tanks.fill_tank_at(pos, fluid, amount, overfill)
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local fluid_name, count, capacity, base_tank, mod = fluidity.tanks.get_tank_at(pos)
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if not fluid_name == fluid and fluid_name ~= nil then return nil end
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local node = minetest.get_node(pos)
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local meta = minetest.get_meta(pos)
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local node_name = mod..":"..base_tank
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local remainder = 0
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if count + amount > capacity then
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if overfill then
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remainder = (count + amount) - capacity
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count = capacity
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else
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return nil
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end
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else
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count = count + amount
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end
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local source_node = fluidity.get_fluid_node(fluid)
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local fluid_desc = fluidity.fluid_name(source_node.description)
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local shorthand_name = fluidity.fluid_short(fluid_desc)
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node_name = mod..":"..base_tank.."_"..shorthand_name
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if not minetest.registered_nodes[node_name] then return nil end
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meta:set_int("fluid", count)
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meta:set_string("infotext", "Tank of "..fluid_desc.."("..count.."/"..capacity.." mB)")
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local param2 = math.min((count/capacity)*63, 63)
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minetest.swap_node(pos, {name=node_name,param1=node.param1,param2=param2})
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return fluid, remainder
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end
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-- Take some fluid from the tank at pos.
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-- Underfill returns an integer as the second variable indicating level below zero.
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function fluidity.tanks.take_from_tank_at(pos, amount, underfill)
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local fluid_name, count, capacity, base_tank, mod = fluidity.tanks.get_tank_at(pos)
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if not fluid_name then return nil end
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local node = minetest.get_node(pos)
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local meta = minetest.get_meta(pos)
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local node_name = mod..":"..base_tank
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local fluid = fluid_name
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local leftover = 0
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if count - amount < 0 then
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if underfill then
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leftover = (count - amount) * -1
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count = 0
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else
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return nil
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end
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else
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count = count - amount
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end
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if count == 0 then
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fluid = nil
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end
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meta:set_int("fluid", count)
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if fluid then
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local source_node = fluidity.get_fluid_node(fluid)
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local fluid_desc = fluidity.fluid_name(source_node.description)
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local shorthand_name = fluidity.fluid_short(fluid_desc)
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node_name = mod..":"..base_tank.."_"..shorthand_name
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meta:set_string("infotext", "Tank of "..fluid_desc.."("..count.."/"..capacity.." mB)")
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else
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meta:set_string("infotext", "Empty Tank")
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end
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local param2 = math.min((count/capacity)*63, 63)
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minetest.swap_node(pos, {name=node_name,param1=node.param1,param2=param2})
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return fluid_name, leftover
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end
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local function bucket_fill(pos, node, clicker, itemstack, pointed_thing)
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local stackname = itemstack:get_name()
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local stack = "bucket:bucket_empty"
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if not stackname:find("bucket") then
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return itemstack
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end
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if stackname == "bucket:bucket_empty" then
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if fluidity.tanks.get_is_empty_tank(node.name) then
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return itemstack
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end
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local fluid = fluidity.tanks.take_from_tank_at(pos, 1000)
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if not fluid then
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return itemstack
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end
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stack = fluidity.get_bucket_for_fluid(fluid)
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else
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local srcnode = fluidity.get_fluid_for_bucket(stackname)
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if not fluidity.tanks.can_fluid_go_in_tank(pos, srcnode) then
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return itemstack
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end
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local fluid = fluidity.tanks.fill_tank_at(pos, srcnode, 1000)
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if fluid == nil then
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return itemstack
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end
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end
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return ItemStack(stack)
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end
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-- Preserve fluid count in the item stack dropped
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local function preserve_metadata(pos, oldnode, oldmeta, drops)
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local fluid_name, count, capacity = fluidity.tanks.get_tank_at(pos)
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local meta = minetest.get_meta(pos)
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local fluid_cnt = meta:get_int("fluid")
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local nodedesc = get_nodedef_field(oldnode.name, "description")
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for i,stack in pairs(drops) do
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local stack_meta = stack:get_meta()
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stack_meta:set_int("fluid", fluid_cnt)
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stack_meta:set_string("description", nodedesc.."\nContains "..count.."/"..capacity.." mB")
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drops[i] = stack
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end
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return drops
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end
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-- Retrieve fluid count from itemstack when placed
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local function after_place_node(pos, placer, itemstack, pointed_thing)
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local item_meta = itemstack:get_meta()
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local fluid_cnt = item_meta:get_int("fluid")
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local fluid = get_nodedef_field(itemstack:get_name(), "fluidity_fluid")
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if fluid_cnt then
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-- Fill the tank to the count specified in item meta, don't care about overfill or what it returns.
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fluidity.tanks.fill_tank_at(pos, fluid, fluid_cnt, true)
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end
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return false
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end
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-- Register a tank for a specific fluid
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local function register_tankfluid(data)
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local source_node = fluidity.get_fluid_node(data.source_name)
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local fluid = fluidity.fluid_name(source_node.description)
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local internal = fluidity.fluid_short(fluid)
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minetest.register_node(data.mod_name..":"..data.tank_name.."_"..internal, {
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description = data.tank_description.." ("..fluid..")",
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drawtype = "glasslike_framed_optional",
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paramtype = "light",
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paramtype2 = "glasslikeliquidlevel",
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fluidity_fluid = data.source_name,
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place_param2 = 0,
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special_tiles = source_node.tiles,
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is_ground_content = false,
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sunlight_propagates = true,
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on_rightclick = bucket_fill,
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preserve_metadata = preserve_metadata,
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after_place_node = after_place_node,
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_mod = data.mod_name,
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_dataname = data.tank_name,
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_capacity = data.capacity,
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groups = {cracky = 1, not_in_creative_inventory = 1, oddly_breakable_by_hand = 3, fluidity_tank = 1},
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tiles = data.tiles
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})
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end
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-- Register a new tank
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function fluidity.tanks.register_fluid_tank(data)
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local modname = data.mod_name or minetest.get_current_modname()
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local tankname = data.tank_name or 'fluid_tank'
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local tankdesc = data.tank_description or 'Fluid Tank'
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local tiles = data.tiles or {"default_glass.png", "default_glass_detail.png"}
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local capacity = data.capacity or 64000
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minetest.register_node(modname..":"..tankname, {
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description = tankdesc,
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drawtype = "glasslike_framed_optional",
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paramtype = "light",
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paramtype2 = "glasslikeliquidlevel",
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is_ground_content = false,
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sunlight_propagates = true,
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fluidity_fluid = nil,
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on_construct = function ( pos )
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local meta = minetest.get_meta(pos)
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meta:set_int("fluid", 0)
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meta:set_string("infotext", "Empty "..tankdesc)
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end,
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on_rightclick = bucket_fill,
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_mod = modname,
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_dataname = tankname,
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_capacity = capacity,
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groups = {cracky = 1, oddly_breakable_by_hand = 3, fluidity_tank = 1, fluid_tank_empty = 1},
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tiles = tiles
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})
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if data.fluids then
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-- This tank only uses certain fluids
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for _, v in pairs(data.fluids) do
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register_tankfluid({
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mod_name = modname,
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tank_name = tankname,
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tank_description = tankdesc,
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tiles = tiles,
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capacity = capacity,
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source_name = v
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})
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end
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else
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-- Get all fluids and buckets and cache them
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for i, v in pairs(bucket.liquids) do
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if (i:find("source") ~= nil) then
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-- Cache bucket
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fluidity.bucket_cache[v["source"]] = v.itemname
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-- Add tank
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register_tankfluid({
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mod_name = modname,
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tank_name = tankname,
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tank_description = tankdesc,
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tiles = tiles,
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capacity = capacity,
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source_name = v["source"]
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})
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end
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end
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end
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end
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