detect if two lines are crossing

[bast0s4]

Hey
My project is to compute a racing line using mathematical functions
I want to know if my trajectory is staying inside the track limits or not (as shown in the pic1)
   
So a function that returns True for the red traj and False for the blue one (also pic 1)


I have no idea how to can do that, any suggestions ?
thanks

[deanhystad]

Numerically? Evaluate functions at X, Y (or f and g, or whatever are the variables for your function) and compare to some bounds.

[Gribouillis]

You could perhaps find and try existing modules (which I don't know) such as fast-crossing in Pypi. This video looks impressive.