using System;

namespace FftSharp.Windows
{
    public class Bartlett : Window, IWindow
    {
        public override string Name => "Bartlett–Hann";
        public override string Description =>
            "The Bartlett–Hann window is triangular in shape (a 2nd order B-spline) which is effectively the " +
            "convolution of two half-sized rectangular windows.";

        protected override double windowValue(int index, int size)
        {
            return 1 - Math.Abs((double)(index - (size / 2)) / (size / 2));
        }
    }
}