How can i find the features with role="outline" and belong to a relation which has type="building"

[linze99]

Hi, i need to find out the features with role="outline" and belong to a relation which has type="building",
then tag them with {"extrude":"false"} or set their attributes with {"extrude":"false"}
So that i can only render the "buidling:part" without extrude the outline polygon?
how can i write the .lua file?thanks

[linze99]

I think i have solved this problem, first accept the relation with type="building"
then mark them in way_function:

	while true do
		local rel = way:NextRelation()
		if not rel then break end
		local featuretype = way:FindInRelation("type")

		if (featuretype == "building") then
			isOutline = true;
		end
		admin_level = math.min(admin_level, tonumber(way:FindInRelation("admin_level")) or 11)
	end