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.

#pragma strict
public class Example extends MonoBehaviour {
	var minimum: float = 10.0f;
	var maximum: float = 20.0f;
	var duration: float = 5.0f;
	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: float = (Time.time - startTime) / duration;
		transform.position = new Vector3(Mathf.SmoothStep(minimum, maximum, t), 0, 0);
	}
}

using UnityEngine;

public class Example : MonoBehaviour
{
    // Minimum and maximum values for the transition.
    float minimum = 10.0f;
    float maximum = 20.0f;

    // Time taken for the transition.
    float duration = 5.0f;

    float startTime;

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

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