First stage of integrating Mauvebic's water flowing code. This is experimental

and doesn't move water yet - but at least it doesn't break anything :-)

autoplace.lua

@@ -178,6 +178,14 @@ function pipes_scansurroundings(pos)
 	   (string.find(nym.name, "pipeworks:pump") ~= nil) then
 		pym=1
 	end
+
+-- ...extra devices specified via the function's parameters
+-- ...except that this part is not implemented yet
+--
+--	if (string.find(nym.name, "aero:outlet") ~= nil) then
+--		pxm, pxp, pym, and/or pyp = 1 depending on the needed rules	
+--	end
+
 end
 
 function pipe_look_for_stackable_tanks(pos)

devices.lua

@@ -35,6 +35,22 @@ pipe_valvehandle_off = {
 	{ -1/16, 4/16, -5/16, 1/16, 5/16, 0 }
 }
 
+spigot_bottomstub = {
+	{ -2/64, -16/64, -6/64,   2/64, 1/64, 6/64 },	-- pipe segment against -Y face
+	{ -4/64, -16/64, -5/64,   4/64, 1/64, 5/64 },
+	{ -5/64, -16/64, -4/64,   5/64, 1/64, 4/64 },
+	{ -6/64, -16/64, -2/64,   6/64, 1/64, 2/64 },
+
+	{ -3/64, -16/64, -8/64, 3/64, -14/64, 8/64 },	-- (the flange for it)
+	{ -5/64, -16/64, -7/64, 5/64, -14/64, 7/64 },
+	{ -6/64, -16/64, -6/64, 6/64, -14/64, 6/64 },
+	{ -7/64, -16/64, -5/64, 7/64, -14/64, 5/64 },
+	{ -8/64, -16/64, -3/64, 8/64, -14/64, 3/64 }
+}
+
+entry_panel = {
+	{ -8/16, -8/16, -1/16, 8/16, 8/16, 1/16 }
+}
 -- Now define the nodes.
 
 local states = { "on", "off" }
@@ -76,7 +92,11 @@ for s in ipairs(states) do
 		groups = dgroups,
 		sounds = default.node_sound_wood_defaults(),
 		walkable = true,
-		stack_max = 99,
+		pipelike = 1,
+		on_construct = function(pos)
+			local meta = minetest.env:get_meta(pos)
+			meta:set_int("pipelike",1)
+		end,
 		after_place_node = function(pos)
 			pipe_scanforobjects(pos)
 		end,
@@ -122,7 +142,11 @@ for s in ipairs(states) do
 		groups = dgroups,
 		sounds = default.node_sound_wood_defaults(),
 		walkable = true,
-		stack_max = 99,
+		pipelike = 1,
+		on_construct = function(pos)
+			local meta = minetest.env:get_meta(pos)
+			meta:set_int("pipelike",1)
+		end,
 		after_place_node = function(pos)
 			pipe_scanforobjects(pos)
 		end,
@@ -131,10 +155,6 @@ for s in ipairs(states) do
 		end,
 		drop = "pipeworks:valve_off",
 		pipelike=1,
-		on_construct = function(pos)
-		local meta = minetest.env:get_meta(pos)
-		meta:set_int("pipelike",1)
-		end,
 	})
 end
 
@@ -154,7 +174,6 @@ minetest.register_node("pipeworks:grating", {
 	groups = {snappy=3, pipe=1},
 	sounds = default.node_sound_wood_defaults(),
 	walkable = true,
-	stack_max = 99,
 	after_place_node = function(pos)
 		pipe_scanforobjects(pos)
 	end,
@@ -191,18 +210,17 @@ minetest.register_node("pipeworks:spigot", {
 	groups = {snappy=3, pipe=1},
 	sounds = default.node_sound_wood_defaults(),
 	walkable = true,
-	stack_max = 99,
+	pipelike=1,
+	on_construct = function(pos)
+		local meta = minetest.env:get_meta(pos)
+		meta:set_int("pipelike",1)
+	end,
 	after_place_node = function(pos)
 		pipe_scanforobjects(pos)
 	end,
 	after_dig_node = function(pos)
 		pipe_scanforobjects(pos)
 	end,
-	pipelike=1,
-	on_construct = function(pos)
-	local meta = minetest.env:get_meta(pos)
-	meta:set_int("pipelike",1)
-	end,
 	node_box = {
 		type = "fixed",
 		fixed = spigotboxes,
@@ -237,7 +255,6 @@ minetest.register_node("pipeworks:entry_panel", {
 	groups = {snappy=3, pipe=1},
 	sounds = default.node_sound_wood_defaults(),
 	walkable = true,
-	stack_max = 99,
 	after_place_node = function(pos)
 		pipe_scanforobjects(pos)
 	end,
@@ -281,7 +298,6 @@ for fill = 0, 10 do
 		groups = {snappy=3, pipe=1, tankfill=fill+1, not_in_creative_inventory=1},
 		sounds = default.node_sound_wood_defaults(),
 		walkable = true,
-		stack_max = 99,
 		drop = "pipeworks:storage_tank_"..fill,
 		after_place_node = function(pos)
 			pipe_look_for_stackable_tanks(pos)
@@ -312,7 +328,6 @@ for fill = 0, 10 do
 		groups = sgroups,
 		sounds = default.node_sound_wood_defaults(),
 		walkable = true,
-		stack_max = 99,
 		after_place_node = function(pos)
 			pipe_look_for_stackable_tanks(pos)
 			pipe_scanforobjects(pos)

flowing_logic.lua

@@ -0,0 +1,110 @@
+-- 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) end
+	if newnode then 
+		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 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(node.param2..' checking '..minetest.pos_to_string(check[node.param2+1])..' for spigot at '..minetest.pos_to_string(pos))
+	local top = minetest.env:get_node(check[node.param2+1]).name
+	dbg('found '..top)
+	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
+
+minetest.register_abm({
+	nodenames = empty_nodenames,
+	interval = 15,
+	chance = 1,
+	action = function(pos, node, active_object_count, active_object_count_wider) check4inflows(pos,node) end
+})
+
+minetest.register_abm({
+	nodenames = full_nodenames,
+	interval = 10,
+	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'},
+	interval = 10,
+	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' then spigot_check(pos,node) end
+	end
+})

init.lua

@@ -10,8 +10,10 @@
 
 -- Un-comment the following dofile line to re-enable the old pipe nodes.
 -- dofile(minetest.get_modpath("pipeworks").."/oldpipes.lua")
+--
 
 minetest.register_alias("pipeworks:pipe", "pipeworks:pipe_110000_empty")
+local DEBUG = true
 
 pipe_leftstub = {
 	{ -32/64, -2/64, -6/64,   1/64, 2/64, 6/64 },	-- pipe segment against -X face
@@ -108,27 +110,10 @@ pipe_bendsphere = {
 	{ -3/64, -3/64, -5/64, 3/64, 3/64, 5/64 }
 }
 
-spigot_bottomstub = {
-	{ -2/64, -16/64, -6/64,   2/64, 1/64, 6/64 },	-- pipe segment against -Y face
-	{ -4/64, -16/64, -5/64,   4/64, 1/64, 5/64 },
-	{ -5/64, -16/64, -4/64,   5/64, 1/64, 4/64 },
-	{ -6/64, -16/64, -2/64,   6/64, 1/64, 2/64 },
-
-	{ -3/64, -16/64, -8/64, 3/64, -14/64, 8/64 },	-- (the flange for it)
-	{ -5/64, -16/64, -7/64, 5/64, -14/64, 7/64 },
-	{ -6/64, -16/64, -6/64, 6/64, -14/64, 6/64 },
-	{ -7/64, -16/64, -5/64, 7/64, -14/64, 5/64 },
-	{ -8/64, -16/64, -3/64, 8/64, -14/64, 3/64 }
-}
-
-entry_panel = {
-	{ -8/16, -8/16, -1/16, 8/16, 8/16, 1/16 }
-}
-
 --  Functions
 
 dbg = function(s)
-	if DEBUG == 1 then
+	if DEBUG then
 		print('[PIPEWORKS] ' .. s)
 	end
 end
@@ -150,6 +135,9 @@ end
 
 -- now define the nodes!
 
+local empty_nodenames = {}
+local full_nodenames = {}
+
 for xm = 0, 1 do
 for xp = 0, 1 do
 for ym = 0, 1 do
@@ -279,12 +267,11 @@ for zp = 0, 1 do
 		groups = pgroups,
 		sounds = default.node_sound_wood_defaults(),
 		walkable = true,
-		stack_max = 99,
 		drop = "pipeworks:pipe_110000_empty",
 		pipelike=1,
 		on_construct = function(pos)
-		local meta = minetest.env:get_meta(pos)
+			local meta = minetest.env:get_meta(pos)
-		meta:set_int("pipelike",1)
+			meta:set_int("pipelike",1)
 		end,
 		after_place_node = function(pos)
 			pipe_scanforobjects(pos)
@@ -310,12 +297,11 @@ for zp = 0, 1 do
 		groups = {snappy=3, pipe=1, not_in_creative_inventory=1},
 		sounds = default.node_sound_wood_defaults(),
 		walkable = true,
-		stack_max = 99,
 		drop = "pipeworks:pipe_110000_empty",
 		pipelike=1,
 		on_construct = function(pos)
-		local meta = minetest.env:get_meta(pos)
+			local meta = minetest.env:get_meta(pos)
-		meta:set_int("pipelike",1)
+			meta:set_int("pipelike",1)
 		end,
 		after_place_node = function(pos)
 			pipe_scanforobjects(pos)
@@ -324,6 +310,8 @@ for zp = 0, 1 do
 			pipe_scanforobjects(pos)
 		end
 	})
+	table.insert(empty_nodenames,"pipeworks:pipe_"..pname.."_empty") -- for the abms
+	table.insert(full_nodenames,"pipeworks:pipe_"..pname.."_loaded") -- for bacon
 end
 end
 end
@@ -335,5 +323,6 @@ dofile(minetest.get_modpath("pipeworks").."/tubes.lua")
 dofile(minetest.get_modpath("pipeworks").."/devices.lua")
 dofile(minetest.get_modpath("pipeworks").."/autoplace.lua")
 dofile(minetest.get_modpath("pipeworks").."/crafts.lua")
+dofile(minetest.get_modpath("pipeworks").."/flowing_logic.lua")
 
 print("Pipeworks loaded!")