Unity Note - Project10 Wave
coconutnut
 2021-02-21 14:49:27      

尝试做个波浪动画，最后效果：

strip做成Prefab

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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using DG.Tweening;

public class Strip : MonoBehaviour
{
    public void Activate(float waitSecond, float moveDistance, float moveDuration)
    {
        StartCoroutine(ActivateMovement(waitSecond, moveDistance, moveDuration));
    }
 
    private IEnumerator ActivateMovement(float waitSecond, float moveDistance, float moveDuration)
    {
        // wait for some time
        yield return new WaitForSeconds(waitSecond);
        
        // set movement
        DOTween.Sequence()
            .Append(transform.DOMoveY(moveDistance, moveDuration).SetEase(Ease.InOutSine))
            .SetLoops(-1,LoopType.Yoyo);
    }
}

加一个controller

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using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class StripController : MonoBehaviour
{
    // object setting
    [SerializeField] private int stripNum = 10;
    [SerializeField] private Vector3 stripScale = new Vector3(0.2f,5,0.01f);
    [SerializeField] private Vector3 stripInterval = new Vector3(0.25f,0,0);

    // movement setting
    [SerializeField] private float moveDistance = 2f;
    [SerializeField] private float moveDuration = 2f;
    [SerializeField] private float moveInterval = 0.1f;

    private Strip stripPrefab;
    private Strip[] strips;
    
    void Start()
    {
        stripPrefab = Resources.Load<Strip>("strip");
        CreateStrips();
    }

    private void CreateStrips()
    {
        strips = new Strip[stripNum];
        for(int i=0; i<stripNum; i++){
            // create cube
            Strip obj = Instantiate(stripPrefab);
            // set position
            obj.transform.position = transform.position + stripInterval * i;
            obj.transform.localScale = stripScale;
            // activate movement
            obj.Activate(moveInterval*(i+5), moveDistance, moveDuration);
            // add to array
            strips[i] = obj;
        }
    }
}

奇怪的一点，前几个条的起始时间总是有点问题，暂时找不出来为什么，先把所有起始时间往后挪一点 MARK

这样就没问题了

关于WaitForSeconds()

https://forum.unity.com/threads/waitforseconds-in-c.75411/

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private void executeWait()
{
  Debug.Log("wait start");
  StartCoroutine(Wait(20.0f));
  Debug.Log("This gets called after starting the Coroutine");
}

private IEnumerator Wait(float seconds)
{
  Debug.Log("waiting");
  yield return new WaitForSeconds(seconds);
  Debug.Log("wait end");
}

现在这个波浪效果一个问题是DOTWeen消耗太大

也许还是直接用波浪形物体平移？

一个很喜欢的chrome插件几枝是用noise做的波浪，试一下Mathf.PerlinNoise()

参考：

https://blog.csdn.net/FumikiSAMA/article/details/80212432

https://docs.unity3d.com/ScriptReference/Mathf.PerlinNoise.html

网格拓扑绘制图形

https://www.jianshu.com/p/1f79e33308a6

试着画了一个四面体

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Vector3[] vertices = new Vector3[4];
vertices[0] = new Vector3(0, 0, 0);
vertices[1] = new Vector3((float)System.Math.Sqrt(3), 1, 0);
vertices[2] = new Vector3(0, 2, 0);
vertices[3] = new Vector3((float)System.Math.Sqrt(1/3), 1, (float)System.Math.Sqrt(8/3));

int[] triangle = new int[12] {0,2,1,0,1,3,1,2,3,2,0,3};

// get mesh
Mesh mesh = GetComponent<MeshFilter>().mesh;

// clear original mesh
mesh.Clear();

// set new vertices
mesh.vertices = vertices;

// set new triangles
mesh.triangles = triangle;

// calculate mesh
mesh.RecalculateNormals();

下次用这个画波浪试试