one-way connections

[otez.jedi]

thanks for your reply. i did it by checking the angle between segments (got it from CurvyDefaultEventHandler).
but i thought of a way of marking the control points in a connection so that if you switch splines you can not switch back.
for example, i have two round orbits and one spline that connects them. i wanted my ship to go from lower orbit to the higher one and stay there.