using UnityEngine;
using System.Collections;

namespace WPM {
    public static class Lerp {

        public static float EaseIn(float t) {
            if (t < 0)
                t = 0;
            else if (t > 1)
                t = 1;
            return 1f - Mathf.Cos(t * Mathf.PI * 0.5f);
        }

        public static float EaseOut(float t) {
            if (t < 0)
                t = 0;
            else if (t > 1)
                t = 1;
            return Mathf.Sin(t * Mathf.PI * 0.5f);
        }

        public static float Exponential(float t) {
            if (t < 0)
                t = 0;
            else if (t > 1)
                t = 1;
            return t * t;
        }

        public static float SmoothStep(float t) {
            return t * t * (3f - 2f * t);
        }

        public static float SmootherStep(float t) {
            if (t < 0)
                t = 0;
            else if (t > 1)
                t = 1;
            return t * t * t * (t * (6f * t - 15f) + 10f);
        }
    }

}