diff --git a/libs/geom/include/psemek/geom/math.hpp b/libs/geom/include/psemek/geom/math.hpp
index 85b900a5..5be880fe 100644
--- a/libs/geom/include/psemek/geom/math.hpp
+++ b/libs/geom/include/psemek/geom/math.hpp
@@ -32,6 +32,30 @@ namespace psemek::geom
 		return x0 * (T(1) - t) + x1 * t;
 	}
 
+	namespace detail
+	{
+
+		template <typename P>
+		auto lerpn_impl(P &, P const &)
+		{}
+
+		template <typename P, typename T, typename ... Args>
+		auto lerpn_impl(P & res, P const & o, P const & p, T const & t, Args const & ... args)
+		{
+			res += t * (p - o);
+			lerpn_impl(res, o, args...);
+		}
+
+	}
+
+	template <typename P, typename T, typename ... Args>
+	auto lerpn(P const & p, T const &, Args const & ... args)
+	{
+		P res = p;
+		detail::lerpn_impl(res, p, args...);
+		return res;
+	}
+
 	// roots of ax^2 + bx + c = 0
 	// in increasing order
 	template <typename T>