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use na;
use math::Point;

/// Computes the center of a set of point.
#[inline]
pub fn center<P: Point>(pts: &[P]) -> P {
    assert!(
        pts.len() >= 1,
        "Cannot compute the center of less than 1 point."
    );

    let denom: P::Real = na::convert(1.0 / (pts.len() as f64));

    let mut piter = pts.iter();
    let mut res = *piter.next().unwrap() * denom;

    for pt in piter {
        res.axpy(denom, pt, na::one());
    }

    res
}