Mathf.SmoothDamp 平滑阻尼

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

Parameters参数

• current
  The current position.
  当前的位置。
• target
  The position we are trying to reach.
  我们试图达到的位置。
• currentVelocity
  The current velocity, this value is modified by the function every time you call it.
  当前速度，这个值在你访问这个函数的时候会被随时修改。
• smoothTime
  Approximately the time it will take to reach the target. A smaller value will reach the target faster.
  要到达目标位置的近似时间，实际到达目标时要快一些。
• maxSpeed
  Optionally allows you to clamp the maximum speed.
  可选参数，允许你限制的最大速度。
• deltaTime
  The time since the last call to this function. By default Time.deltaTime.
  上次调用该函数到现在的时间。缺省为Time.deltaTime。

Description描述

Gradually changes a value towards a desired goal over time.

随着时间的推移逐渐改变一个值到期望值。

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.

这个值就像被一个不会崩溃的弹簧减振器一样被平滑。这个函数可以用来平滑任何类型的值，位置，颜色，标量。

using UnityEngine;
using System.Collections;

public class example : 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);
	}
}

// Smooth towards the height of the target
//平滑到目标高度
var target : Transform;
var smoothTime = 0.3;
private var yVelocity = 0.0;

function Update () {
	var newPosition : float = Mathf.SmoothDamp(transform.position.y, target.position.y,
	yVelocity, smoothTime);
	transform.position = Vector3(transform.position.x, newPosition, transform.position.z);
}