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-- Demonstration signals
-- Those can display the 3 main aspects of Ks signals

-- Note that the group value of advtrains_signal is 2, which means "step 2 of signal capabilities"
-- advtrains_signal=1 is meant for signals that do not implement set_aspect.


local setaspect = function(pos, node, asp)
	if asp.main == 0 then
		advtrains.ndb.swap_node(pos, {name="advtrains_interlocking:ds_danger"})
	else
		if asp.dst ~= 0 and asp.main == -1 then
			advtrains.ndb.swap_node(pos, {name="advtrains_interlocking:ds_free"})
		else
			advtrains.ndb.swap_node(pos, {name="advtrains_interlocking:ds_slow"})
		end
	end
	local meta = minetest.get_meta(pos)
	if meta then
		meta:set_string("infotext", minetest.serialize(asp))
	end
end

local suppasp = {