Straight ahead tubes can be placed my means of the "sneak" button

releasenotes.md

@@ -1,6 +1,18 @@
 # Release Notes of the ModPack TechPack [techpack]
 
 
+
+## V1.16.1 (2018-09-21)
+
+
+### Additions
+- Straight ahead tubes can be placed my means of the "sneak" button
+
+### Fixes
+- Minor tube placing bug fixed
+
+
+
 ## V1.16 (2018-09-20)
 
 ### Changes

smartline/icta/formspec.lua

@@ -217,7 +217,7 @@ end
 function smartline.formspecNotes(meta)
 	local running = meta:get_int("state") == tubelib.RUNNING
 	local cmnd = running and "stop;Stop" or "start;Start" 
-	local notes = meta:get_string("notes")
+	local notes = meta:get_string("notes") or ""
 	if notes == "" then notes = "<space for your notes>" end
 	notes = minetest.formspec_escape(notes)
 	return SIZE..

tubelib/tubes1.lua

@@ -58,6 +58,7 @@ end
 
 -- Convertion of 'dir' (view from the outside to inside and vs)
 local Turn180Deg = {3,4,1,2,6,5}
+local Turn90Deg = {2,3,4,5,6,1}
 
 local Dir2Offset = {
 	{x=0,  y=0,  z=1},
@@ -227,10 +228,12 @@ local function update_next_tube(dir, pos)
 	local conn1 = is_connected(pos, dir1) or is_known_node(pos, dir1)
 	local conn2 = is_connected(pos, dir2) or is_known_node(pos, dir2)
 	-- already connected or no tube arround?
-	if conn1 == conn2 then
+	if (conn1 and conn2) or (not dir1 and not dir2) then
 		return
-	end
+	elseif not conn1 and not conn2 then
-	if conn1 then 
+		dir1 = Turn90Deg[dir1] 
+		dir2 = Turn180Deg[dir1]
+	elseif conn1 then 
 		dir2 = Turn180Deg[dir]
 	else
 		dir1 = Turn180Deg[dir]
@@ -267,7 +270,7 @@ local function update_tube(pos, dir)
 	swap_node(pos, node_num, param2)
 end
 
-function tubelib.update_tubes(pos, dir)
+function tubelib.update_tubes(pos, dir, straight_ahead)
 	-- Update all tubes arround the currently placed tube
 	update_next_tube(1, {x=pos.x  , y=pos.y  , z=pos.z+1})
 	update_next_tube(2, {x=pos.x+1, y=pos.y  , z=pos.z  })
@@ -275,8 +278,10 @@ function tubelib.update_tubes(pos, dir)
 	update_next_tube(4, {x=pos.x-1, y=pos.y  , z=pos.z  })
 	update_next_tube(5, {x=pos.x  , y=pos.y-1, z=pos.z  })
 	update_next_tube(6, {x=pos.x  , y=pos.y+1, z=pos.z  })
+	if not straight_ahead then
 		-- Update the placed tube
 		update_tube(pos, dir)
+	end
 	return tubelib.delete_meta_data(pos, minetest.get_node(pos)) < MAX_TUBE_LENGTH
 end		
 

tubelib/tubes2.lua

@@ -174,14 +174,15 @@ for idx,pos in ipairs(DirCorrections) do
 		after_place_node = function(pos, placer, itemstack, pointed_thing)
 			local res
 			local pitch = placer:get_look_pitch()
+			local straight_ahead = placer:get_player_control().sneak
 			if pitch > 1 then
-				res = tubelib.update_tubes(pos, 6)
+				res = tubelib.update_tubes(pos, 6, straight_ahead)
 			elseif pitch < -1 then
-				res = tubelib.update_tubes(pos, 5)
+				res = tubelib.update_tubes(pos, 5, straight_ahead)
 			else
 				local dir = placer:get_look_dir()
 				local facedir = minetest.dir_to_facedir(dir)
-				res = tubelib.update_tubes(pos, facedir + 1)
+				res = tubelib.update_tubes(pos, facedir + 1, straight_ahead)
 			end
 			if res == false then
 				tubelib.delete_meta_data(pos, minetest.get_node(pos))