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

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public static float SmoothDamp(float current, float target, ref float currentVelocity, float smoothTime, float maxSpeed = Mathf.Infinity, float deltaTime = Time.deltaTime);

Parameters

currentThe current position.
targetThe position we are trying to reach.
currentVelocityThe current velocity, this value is modified by the function every time you call it.
smoothTimeApproximately the time it will take to reach the target. A smaller value will reach the target faster.
maxSpeedOptionally allows you to clamp the maximum speed.
deltaTimeThe time since the last call to this function. By default Time.deltaTime.

Description

Gradually changes a value towards a desired goal over time.

The value is smoothed by some spring-damper like function, which will never overshoot. The function can be used to smooth any kind of value, positions, colors, scalars.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Transform target; public float smoothTime = 0.3F; private float yVelocity = 0.0F; void Update() { float newPosition = Mathf.SmoothDamp(transform.position.y, target.position.y, ref yVelocity, smoothTime); transform.position = new Vector3(transform.position.x, newPosition, transform.position.z); } }

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