Mathf.SmoothStep

Description

Interpolates between min and max with smoothing at the limits.

This function interpolates between min and max in a similar way to Lerp. However, the interpolation will gradually speed up from the start and slow down toward the end. This is useful for creating natural-looking animation, fading and other transitions.

// Minimum and maximum values for the transition.
var minimum = 10.0;
var maximum = 20.0;

// Time taken for the transition.
var duration = 5.0;


private var startTime: float;


function Start() {
    // Make a note of the time the script started.
    startTime = Time.time;
}


function Update() {
    // Calculate the fraction of the total duration that has passed.
    var t = (Time.time - startTime) / duration;
    transform.position = Vector3(Mathf.SmoothStep(minimum, maximum, t), 0, 0);
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public float minimum = 10.0F;
    public float maximum = 20.0F;
    public float duration = 5.0F;
    private float startTime;
    void Start() {
        startTime = Time.time;
    }
    void Update() {
        float t = (Time.time - startTime) / duration;
        transform.position = new Vector3(Mathf.SmoothStep(minimum, maximum, t), 0, 0);
    }
}