first working version

override.lua

@@ -0,0 +1,81 @@
+
+-- Override digilines.transmit and digilines.receptor_send to add more functionality
+-- Mostly copied from https://github.com/minetest-mods/digilines/blob/master/internal.lua
+
+
+local function queue_new()
+	return {nextRead = 1, nextWrite = 1}
+end
+
+local function queue_empty(queue)
+	return queue.nextRead == queue.nextWrite
+end
+
+local function queue_enqueue(queue, object)
+	local nextWrite = queue.nextWrite
+	queue[nextWrite] = object
+	queue.nextWrite = nextWrite + 1
+end
+
+local function queue_dequeue(queue)
+	local nextRead = queue.nextRead
+	local object = queue[nextRead]
+	queue[nextRead] = nil
+	queue.nextRead = nextRead + 1
+	return object[1], object[2]
+end
+
+function digilines.transmit(pos, channel, msg, checked, origin)
+	local checkedID = minetest.hash_node_position(pos)
+	if checked[checkedID] or not origin then
+		return
+	end
+	checked[checkedID] = true
+
+	digilines.vm_begin()
+	local queue = queue_new()
+	queue_enqueue(queue, {pos, origin})
+	while not queue_empty(queue) do
+		local curPos, fromPos = queue_dequeue(queue)
+		local node = digilines.get_node_force(curPos)
+		local spec = digilines.getspec(node)
+		if spec then
+			-- Effector actions --> Receive
+			if spec.effector then
+				spec.effector.action(curPos, node, channel, msg, fromPos)
+			end
+			-- Cable actions --> Transmit
+			local rules
+			-- Custom semiconductor def for digicontrol nodes
+			if spec.semiconductor then
+				rules = spec.semiconductor.rules(node, curPos, fromPos, channel)
+			elseif spec.wire then
+				rules = digilines.importrules(spec.wire.rules, node)
+			end
+			if rules then
+				for _, rule in ipairs(rules) do
+					local nextPos = digilines.addPosRule(curPos, rule)
+					if digilines.rules_link(curPos, nextPos) then
+						checkedID = minetest.hash_node_position(nextPos)
+						if not checked[checkedID] then
+							checked[checkedID] = true
+							queue_enqueue(queue, {nextPos, curPos})
+						end
+					end
+				end
+			end
+		end
+	end
+	digilines.vm_end()
+end
+
+
+function digilines.receptor_send(pos, rules, channel, msg)
+	local checked = {}
+	checked[minetest.hash_node_position(pos)] = true -- exclude itself
+	for _,rule in ipairs(rules) do
+		if digilines.rules_link(pos, digilines.addPosRule(pos, rule)) then
+			digilines.transmit(digilines.addPosRule(pos, rule), channel, msg, checked, pos)
+		end
+	end
+end