Function ramer_douglas_peucker::rdp

pub fn rdp<T, U>(points: &[Point2<T>], epsilon: f64) -> Vec<usize> where
    T: Copy + Sub<Output = U>,
    U: NumCast,
    T: NumCast, 

Given a set of points and an epsilon, returns a list of indexes to keep.

If the first and last points are the same, then the points are treated as a closed polygon