and again

include/td/Maths.h

@@ -176,6 +176,11 @@ Mat4f Look(const Vec3f& eye, const Vec3f& center, const Vec3f& up);
 
 Mat4f Inverse(const Mat4f& mat);
 
+template<typename T>
+T Lerp(T v0, T v1, T t) {
+	return (T(1) - t) * v0 + t * v1;
+}
+
 }  // namespace maths