Pumps and valves now fully participate in the auto-rotate/auto-route process.

These devices can only be connected to horizontal pipes or to each other.  Note
that only the device being placed and the pipes around it will adapt; if you
have a valve and pump next to one another and they won't connect, put a piece
of pipe at one end to show the auto-rotator which way they should go.  Removal
of a pipe or device will not change the orientation of surrounding devices.

autoplace.lua

@@ -0,0 +1,104 @@
+
+function pipe_autoroute(pos, state)
+
+	nctr = minetest.env:get_node(pos)
+	if (string.find(nctr.name, "pipeworks:pipe_") == nil) then return end
+
+	pxm=0
+	pxp=0
+	pym=0
+	pyp=0
+	pzm=0
+	pzp=0
+
+	nxm = minetest.env:get_node({ x=pos.x-1, y=pos.y  , z=pos.z   })
+	nxp = minetest.env:get_node({ x=pos.x+1, y=pos.y  , z=pos.z   })
+	nym = minetest.env:get_node({ x=pos.x  , y=pos.y-1, z=pos.z   })
+	nyp = minetest.env:get_node({ x=pos.x  , y=pos.y+1, z=pos.z   })
+	nzm = minetest.env:get_node({ x=pos.x  , y=pos.y  , z=pos.z-1 })
+	nzp = minetest.env:get_node({ x=pos.x  , y=pos.y  , z=pos.z+1 })
+
+	if (string.find(nxm.name, "pipeworks:pipe_") ~= nil) then pxm=1 end
+	if (string.find(nxp.name, "pipeworks:pipe_") ~= nil) then pxp=1 end
+	if (string.find(nym.name, "pipeworks:pipe_") ~= nil) then pym=1 end
+	if (string.find(nyp.name, "pipeworks:pipe_") ~= nil) then pyp=1 end
+	if (string.find(nzm.name, "pipeworks:pipe_") ~= nil) then pzm=1 end
+	if (string.find(nzp.name, "pipeworks:pipe_") ~= nil) then pzp=1 end
+
+	pipe_checkfordevice(pos, "valve")
+	pipe_checkfordevice(pos, "pump")
+	
+	nsurround = pxm..pxp..pym..pyp..pzm..pzp
+	
+	if nsurround == "000000" then nsurround = "110000" end
+
+	minetest.env:add_node(pos, { name = "pipeworks:pipe_"..nsurround..state })
+end
+
+function pipe_device_autorotate(pos, state, bname)
+
+	local nctr = minetest.env:get_node(pos)
+
+	pxm=0
+	pxp=0
+	pzm=0
+	pzp=0
+
+	nxm = minetest.env:get_node({ x=pos.x-1, y=pos.y  , z=pos.z   })
+	nxp = minetest.env:get_node({ x=pos.x+1, y=pos.y  , z=pos.z   })
+	nzm = minetest.env:get_node({ x=pos.x  , y=pos.y  , z=pos.z-1 })
+	nzp = minetest.env:get_node({ x=pos.x  , y=pos.y  , z=pos.z+1 })
+
+	if (string.find(nxm.name, "pipeworks:pipe_") ~= nil) then pxm=1 end
+	if (string.find(nxp.name, "pipeworks:pipe_") ~= nil) then pxp=1 end
+	if (string.find(nzm.name, "pipeworks:pipe_") ~= nil) then pzm=1 end
+	if (string.find(nzp.name, "pipeworks:pipe_") ~= nil) then pzp=1 end
+
+	pipe_checkfordevice(pos, "pump")
+	pipe_checkfordevice(pos, "valve")
+
+	if (pxm+pxp) ~= 0 then
+		minetest.env:add_node(pos, { name = bname..state.."_x" })
+		return
+	end
+
+	if (pzm+pzp) ~= 0 then
+		minetest.env:add_node(pos, { name = bname..state.."_z" })
+	end
+	
+end
+
+pipe_checkfordevice = function(pos, bname)
+	if (string.find(nxm.name, "pipeworks:"..bname.."_off_x") ~= nil) or
+	   (string.find(nxm.name, "pipeworks:"..bname.."_on_x") ~= nil) then
+		pxm=1
+	end
+
+	if (string.find(nxp.name, "pipeworks:"..bname.."_off_x") ~= nil) or
+	   (string.find(nxp.name, "pipeworks:"..bname.."_on_x") ~= nil) then
+		pxp=1
+	end
+
+	if (string.find(nzm.name, "pipeworks:"..bname.."_off_z") ~= nil) or
+	   (string.find(nzm.name, "pipeworks:"..bname.."_on_z") ~= nil) then
+		pzm=1
+	end
+
+	if (string.find(nzp.name, "pipeworks:"..bname.."_off_z") ~= nil) or
+	   (string.find(nzp.name, "pipeworks:"..bname.."_on_z") ~= nil) then
+		pzp=1
+	end
+end
+
+pipe_scanforobjects = function(pos)
+	pipe_autoroute({ x=pos.x-1, y=pos.y  , z=pos.z   }, "_loaded")
+	pipe_autoroute({ x=pos.x+1, y=pos.y  , z=pos.z   }, "_loaded")
+	pipe_autoroute({ x=pos.x  , y=pos.y  , z=pos.z-1 }, "_loaded")
+	pipe_autoroute({ x=pos.x  , y=pos.y  , z=pos.z+1 }, "_loaded")
+
+	pipe_autoroute({ x=pos.x-1, y=pos.y  , z=pos.z   }, "_empty")
+	pipe_autoroute({ x=pos.x+1, y=pos.y  , z=pos.z   }, "_empty")
+	pipe_autoroute({ x=pos.x  , y=pos.y  , z=pos.z-1 }, "_empty")
+	pipe_autoroute({ x=pos.x  , y=pos.y  , z=pos.z+1 }, "_empty")
+end
+