unity 使用 VectorLine 画线（包含画线过程）

需要以下两个插件：Vectrosity和DOTween

将下面脚本挂在要绘制连线的对象的父物体上，lineMaterial材质球使用Vectrosity插件自带的SolidColor Shader

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

public class DawnLine : MonoBehaviour
{
    public bool is3D = false;

    private List<Transform> pos;
    private VectorLine line;
    
    public float time = 0.2f;
    public float width = 5f;
    //public Color color = Color.green;
    public Material lineMaterial;

    private int index = 0;
    private Vector3 tmpVec3;
    private bool isDraw = false;

    void Start()
    {
        InitLine();
    }

    private void InitLine()
    {
        pos = new List<Transform>();

        for (int i = 0; i < transform.childCount; i++)
        {
            pos.Add(transform.GetChild(i));
        }

        if (is3D)
        {
            line = new VectorLine("line", new List<Vector3>(), width, LineType.Continuous, Joins.Weld);
        }
        else
        {
            line = new VectorLine("line", new List<Vector2>(), width, LineType.Continuous, Joins.Weld);
        }

        //line.color = color;
        line.material = lineMaterial;
    }

    public void StartDawnLine()
    {
        HideDrawLine();
        tmpVec3 = pos[0].position;
        Draw();
        StartCoroutine("Wait");
    }

    public void HideDrawLine()
    {
        if (isDraw)
        {
            return;
        }
        
        if(is3D)
        {
            line.points3.Clear();
        }
        else
        {
            line.points2.Clear();
        }
        
        line.Draw();
        index = 0;
        StopCoroutine("Wait");
    }

    
    IEnumerator Wait()
    {
        isDraw = true;
        while(index < pos.Count - 1)
        {
            if (index == pos.Count - 2)
            {
                DOTween.To(() => pos[index].position, x => tmpVec3 = x, pos[index + 1].position, time).OnUpdate(Draw).OnComplete(EndDrawLine).SetEase(Ease.Linear);
            }
            else
            {
                DOTween.To(() => pos[index].position, x => tmpVec3 = x, pos[index + 1].position, time).OnUpdate(Draw).SetEase(Ease.Linear);
            }
            yield return new WaitForSeconds(time);
            index++;
        }
        yield break;
    }

    private void Draw()
    {
        if(is3D)
        {
            line.points3.Add(tmpVec3);
            line.Draw3D();
        }
        else
        {
            line.points2.Add(tmpVec3);
            line.Draw();
        }
    }

    private void EndDrawLine()
    {
        //Debug.Log("draw end");
        isDraw = false;
    }
}

场景看起来就像这样

运行效果如下

最后，如不嫌弃，小小工程献上

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