Unity画线

using System.Collections.Generic;
using UnityEngine;

/// <summary>物体绘制线</summary>
public class ObjectDrawline : MonoBehaviour
{
    #region 数据申明

    private LineRenderer lineRender=null;
    private List<Vector3> linePoints = new List<Vector3>();
    private List<GameObject> targetList = new List<GameObject>();
    private bool isDisplay = false;

    #endregion

    #region Untiy函数

    private void Update()
    {
        if (isDisplay && lineRender != null) UpdatPosition();
    }

    #endregion

    #region 公开函数

    public void Create(bool isDisplay = false, float lineSize=1, Material material=null)
    {
        this.isDisplay = isDisplay;
        lineRender = gameObject.AddComponent<LineRenderer>();
        Set(lineSize, material);
    }

    public void Set(float lineSize, Material material=null)
    {
        if (lineRender == null) return;
        lineRender.startWidth = lineSize;
        lineRender.endWidth = lineSize;
        lineRender.material = material;
    }

    public void Show()
    {
        if (lineRender == null) return;
        isDisplay = true;
        lineRender.enabled = isDisplay;
    }

    public void Hid()
    {
        if (lineRender == null) return;
        isDisplay = false;
        lineRender.enabled = isDisplay;
    }

    public void Clear()
    {
        linePoints.Clear();
        targetList.Clear();
    }

    public void Add(GameObject target)
    {
        targetList.Add(target);
    }

    public void Remove(GameObject target)
    {
        targetList.Remove(target);
    }

    public void Delete()
    {
        Destroy(gameObject);
    }

    #endregion

    #region 私有函数

    private void UpdatPosition()
    {
        if (targetList == null || targetList.Count < 2) return;

        linePoints.Clear();
        for (int i = 0; i < targetList.Count; i++)
        {
            if (targetList[i] != null) linePoints.Add(targetList[i].transform.position);
        }

        lineRender.SetPositions(linePoints.ToArray());
    }

    #endregion

}

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