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-- This file provides the actual flow and pathfinding logic that makes water
-- move through the pipes.
--
-- Contributed by mauvebic, 2013-01-03, with tweaks by Vanessa Ezekowitz
--
local check4liquids = function(pos)
local coords = {
{x=pos.x,y=pos.y-1,z=pos.z},
{x=pos.x,y=pos.y+1,z=pos.z},
{x=pos.x-1,y=pos.y,z=pos.z},
{x=pos.x+1,y=pos.y,z=pos.z},
{x=pos.x,y=pos.y,z=pos.z-1},
{x=pos.x,y=pos.y,z=pos.z+1}, }
for i =1,6 do
local name = minetest.env:get_node(coords[i]).name
if string.find(name,'water') then return true end
end
return false
end
local check4inflows = function(pos,node)
local coords = {
{x=pos.x,y=pos.y-1,z=pos.z},
{x=pos.x,y=pos.y+1,z=pos.z},
{x=pos.x-1,y=pos.y,z=pos.z},
{x=pos.x+1,y=pos.y,z=pos.z},
{x=pos.x,y=pos.y,z=pos.z-1},
{x=pos.x,y=pos.y,z=pos.z+1}, }
local newnode = false
local source = false
for i =1,6 do
if newnode then break end
local name = minetest.env:get_node(coords[i]).name
if (name == 'pipeworks:pump_on' and check4liquids(coords[i])) or string.find(name,'_loaded') then
if string.find(name,'_loaded') then
local source = minetest.env:get_meta(coords[i]):get_string('source')
if source == minetest.pos_to_string(pos) then break end
end
newnode = string.gsub(node.name,'empty','loaded')
source = {x=coords[i].x,y=coords[i].y,z=coords[i].z}
if newnode ~= nil then dbg(newnode) end
end
end
if newnode then
dbg(newnode..' to replace '..node.name)
minetest.env:add_node(pos,{name=newnode})
minetest.env:get_meta(pos):set_string('source',minetest.pos_to_string(source))
end
end
local checksources = function(pos,node)
local sourcepos = minetest.string_to_pos(minetest.env:get_meta(pos):get_string('source'))
local source = minetest.env:get_node(sourcepos).name
local newnode = false
if not ((source == 'pipeworks:pump_on' and check4liquids(sourcepos)) or string.find(source,'_loaded') or source == 'ignore' ) then
newnode = string.gsub(node.name,'loaded','empty')
end
if newnode then dbg(newnode..' to replace '..node.name) end
if newnode then
minetest.env:add_node(pos,{name=newnode})
minetest.env:get_meta(pos):set_string('source','')
end
end
local update_outlet = function(pos)
local top = minetest.env:get_node({x=pos.x,y=pos.y+1,z=pos.z}).name
if string.find(top,'_loaded') then
minetest.env:add_node({x=pos.x,y=pos.y-1,z=pos.z},{name='default:water_source'})
elseif minetest.env:get_node({x=pos.x,y=pos.y-1,z=pos.z}).name == 'default:water_source' then
minetest.env:remove_node({x=pos.x,y=pos.y-1,z=pos.z})
end
end
local spigot_check = function(pos,node)
local fdir=node.param2
local check = {{x=pos.x,y=pos.y,z=pos.z+1},{x=pos.x+1,y=pos.y,z=pos.z},{x=pos.x,y=pos.y,z=pos.z-1},{x=pos.x-1,y=pos.y,z=pos.z} }
dbg(fdir..' checking '..minetest.pos_to_string(check[fdir+1])..' for spigot at '..minetest.pos_to_string(pos))
local top = minetest.env:get_node(check[fdir+1]).name
dbg('found '..top)
if string.find(top,'_loaded') then
minetest.env:add_node({x=pos.x,y=pos.y,z=pos.z},{name='pipeworks:spigot_pouring', param2 = fdir})
minetest.env:add_node({x=pos.x,y=pos.y-1,z=pos.z},{name='default:water_source'})
elseif minetest.env:get_node({x=pos.x,y=pos.y-1,z=pos.z}).name == 'default:water_source' then
minetest.env:add_node({x=pos.x,y=pos.y,z=pos.z},{name='pipeworks:spigot', param2 = fdir})
minetest.env:remove_node({x=pos.x,y=pos.y-1,z=pos.z})
end
end
minetest.register_abm({
nodenames = pipes_empty_nodenames,
interval = 1,
chance = 1,
action = function(pos, node, active_object_count, active_object_count_wider) check4inflows(pos,node) end
})
minetest.register_abm({
nodenames = pipes_full_nodenames,
interval = 1,
chance = 1,
action = function(pos, node, active_object_count, active_object_count_wider) checksources(pos,node) end
})
minetest.register_abm({
nodenames = {'pipeworks:outlet','pipeworks:spigot','pipeworks:spigot_pouring'},
interval = 1,
chance = 1,
action = function(pos, node, active_object_count, active_object_count_wider)
if node.name == 'pipeworks:outlet' then update_outlet(pos)
elseif node.name == 'pipeworks:spigot' or node.name == 'pipeworks:spigot_pouring' then spigot_check(pos,node) end
end
})
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