Add routesetting callbacks.

Now, only the signal aspect setting is still missing

1 files changed, 10 insertions, 0 deletions

diff --git a/advtrains/helpers.lua b/advtrains/helpers.lua
index 2160444..c91af34 100644
--- a/advtrains/helpers.lua
+++ b/advtrains/helpers.lua
@@ -339,3 +339,13 @@ function advtrains.roundfloorpts(pos)
 	return minetest.pos_to_string(advtrains.round_vector_floor_y(pos))

 end

 

+-- insert an element into a table if it does not yet exist there

+-- equalfunc is a function to compare equality, defaults to ==

+-- returns true if the element was inserted

+function advtrains.insert_once(tab, elem, equalfunc)

+	for _,e in pairs(tab) do

+		if equalfunc and equalfunc(elem, e) or e==elem then return false end

+	end

+	tab[#tab+1] = elem

+	return true

+end