Version: 2018.2 (switch to 2018.3b or 2017.4)
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Mathf.SmoothStep

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public static float SmoothStep(float from, float to, float t);

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.

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); } }

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