add rainbow wires

sim/network.lua

@@ -100,6 +100,8 @@ function network_update()
 				local wire = Simulation.getwirebyref(sim, tonumber(data[i+1]))
 				if wire ~= nil then
 					Wire.setlayer(wire, tonumber(data[i+2]))
+				else
+					error("Setlayer: no wire for objref "..tonumber(data[i+1]))
 				end
 				
 				i = i + 2

sim/simulation.lua

@@ -184,7 +184,10 @@ function Simulation.connectwireat(sim, wire, x, y, z)
 	for k, obj in pairs(objs) do
 		if obj ~= wire and obj.group ~= nil then
 			if is_wire(obj) then -- wire
-				if Wire.getlayer(obj) == Wire.getlayer(wire) then -- same layer
+				local layer1 = Wire.getlayer(wire)
+				local layer2 = Wire.getlayer(obj)
+				--if they are on the same real layer, or exactly one is rainbow but not both, then connect
+				if ((layer1==layer2) or (layer1==-1 and layer2~=-1) or (layer1~=-1 and layer2==-1)) and (not (layer1==-1 and layer2==-1)) then
 					Group.addwire(obj.group, wire)
 				end
 			else -- port

sim/wire.lua

@@ -20,7 +20,9 @@ function Wire.setlayer(wire, layer)
 end
 
 function Wire.update(wire)
+	if wire.layer~=-1 then
 		network_send("WU\t" .. (wire.group.state~=0 and "1" or "0") .. "\t" .. wire.objref .. "\n")
+	end
 end
 
 function Wire.setgroup(wire, group)