Function clip_segment_segment 

pub fn clip_segment_segment(
    seg1: (Point<f64>, Point<f64>),
    seg2: (Point<f64>, Point<f64>),
) -> Option<((Point<f64>, Point<f64>, usize, usize), (Point<f64>, Point<f64>, usize, usize))>

Projects two segments on one another and compute their intersection.