PROSAGA码农传奇-虚拟现实VR-Lerp.localScale不支持OnTriggerEnter，Unity5.3.3，Gear VR App Dev

<div class =“post-text”itemprop =“text”>
  
    你误解了Lerp的作用。 Lerp本身没有动画任何东西，它只在两个值之间插入t，其中t在0到1的范围内。你可以想象t为百分比 - ＆gt;如果t为0，则lerp的结果为第一个值（或者v3的情况也是第2个方向的0％），如果t为1则结果为第二个，如果t为0.5，则结果位于中间两个，所以如果它的0.25在25％（Slerp基本相同，只有该值代表一个旋转，检查维基百科的所有内容的更多信息）。
  
  
    但到底这对你意味着什么呢？
  
  
    您需要多次调用Lerp，并将t设置为您及时的位置。一种选择是启动协程并逐渐减少/减少
     <code>
 (1 / seconds) * Time.deltaTime
 </code>
     一旦玩家进入/退出触发器，每个帧。
  
  
    编辑：
  
  
    将其附加到可见的游戏对象并运行它。它认为它应该清理Lerp的工作原理。重要的是
    的
      Ť
    </强>
    。它需要随着时间的推移而减少以获得动画效果。
  
   <pre>
 <code>
 using UnityEngine;

public class LerpExample : MonoBehaviour {

public Vector3 targetScale = new Vector3(2, 2, 2);
    public float duration = 2;

Vector3 originalScale;
    float timeFactor;
    float t;

void Start() {
        originalScale = transform.localScale;

//since only values between 0 and 1 will do something
        //we need to know "how much" Time.deltaTime affects our lerping
        //ofc we could calculate it "on the fly", but it stays the same so better store it
        timeFactor = 1 / duration;

t = 0;
    }

void Update() {

//this is just so it repeats over and over
        //if t would grow bigger than 1, it would just be interpreted as 1 by Lerp
        if (t > 1) t -= 1;

//this is what animates it in the end. each frame (its the update method!) a fraction gets added to t. think of it as percentage.
        t += timeFactor * Time.deltaTime;
        transform.localScale = Vector3.Lerp(originalScale, targetScale, t);

}
}

</code>
 </pre>
  
    edit2：好吧，这是以上在协程中运行的。虽然是一个小“陷阱”。我没有说明玩家在缩放结束前离开触发器的时间。如果他这样做，则持续时间不一致。例如，如果它是10s并且他在2s后离开，他将缩回到正常超过10，而不是2秒。如果你想要它修复，我会把它留给你解决。
  
  
    这是触发器
  
   <pre>
 <code>
 using UnityEngine;

public class Cake : MonoBehaviour {

public Vector3 targetScale = new Vector3(2, 2, 2);
    public float duration = 2;

void OnTriggerEnter(Collider other) {
 Alice alice = other.GetComponentInParent<Alice>();
 if (alice == null) return;
 alice.Eat(this);
 }
 void OnTriggerExit(Collider other) {
 Alice alice = other.GetComponentInParent<Alice>();
 if (alice == null) return;
 alice.GrowBackToNormal(this);
 }

}

</code>
 </pre>
  
    这会进入触发器的对象
  
   <pre>
 <code>
 using UnityEngine;
using System.Collections;

public class Alice : MonoBehaviour {

Vector3 originalScale;
    Coroutine eatAllTheCakeCoroutine;

void Start() {
        originalScale = transform.localScale;
    }

IEnumerator ChangeScale(Vector3 targetScale, float duration) {
 Vector3 startScale = transform.localScale;
 float timeFactor = 1 / duration;
 float t = 0;
 while (t < 1) {
 t += timeFactor * Time.deltaTime;
 transform.localScale = Vector3.Lerp(startScale, targetScale, t);
 yield return null;
 }
 transform.localScale = targetScale;
 }

public void Eat(Cake cake) {
        if (eatAllTheCakeCoroutine != null) StopCoroutine(eatAllTheCakeCoroutine);
        eatAllTheCakeCoroutine = StartCoroutine(ChangeScale(cake.targetScale, cake.duration));

}
    public void GrowBackToNormal(Cake cake) {
        if(eatAllTheCakeCoroutine != null) StopCoroutine(eatAllTheCakeCoroutine);
        eatAllTheCakeCoroutine = StartCoroutine(ChangeScale(originalScale, cake.duration));
    }
}

</code>
 </pre>
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