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Unity实现连连看连线效果

news 来源：原创 2025/4/30 3:55:23

1.一个比较简单的向量计算，用的LineRenderer实现；

已知起始A点和终点C点，求B点；

先计算A点到C点的向量取归一化当做方向，再给定一个“模长”（B点到A点的模长）乘以该方向，最后加上LineRenderer的自身坐标位置（即A点位置）转换到世界空间；

代码如下：

using System.Collections;
using System.Collections.Generic;
using Unity.Mathematics;
using Unity.VisualScripting;
using UnityEngine;

[ExecuteInEditMode]
public class LineEffects : MonoBehaviour
{
    public  Color LineCol = Color.white;
    public GameObject A;
    public GameObject c;
    public GameObject Line;
    private LineRenderer myLineRenderer;
    [Range(0,0.1f)]public float LineWidth = 0.05f;
    [Range(0,1)]public float MidDistance = 0.25f;

    void Start()
    {
        myLineRenderer = Line.GetComponent<LineRenderer>();
    }

    // Update is called once per frame
    void Update()
    {
        MidLenthMath();


    }

    public void MidLenthMath(){
        myLineRenderer.startWidth = LineWidth;
        myLineRenderer.endWidth = LineWidth;
        //位置
        Vector3 StartPos = A.transform.position - Line.transform.position;
        Vector3 EndPos = c.transform.position - Line.transform.position;

        //向量
        Vector3 X = (c.transform.position - A.transform.position);
        //求中间位置//这个是按照模长求的位置
        X = X.normalized*MidDistance;
        //求解中间B点位置
        Vector3 B = new Vector3(0,0,0);
        B = X + A.transform.position;
        B = new Vector3(B.x,0,B.z);

        myLineRenderer.SetPosition(0,StartPos);
        myLineRenderer.SetPosition(1,B);
        myLineRenderer.SetPosition(2,EndPos);

        Material myLineMat =  myLineRenderer.sharedMaterial;
        myLineMat.SetColor("_UnlitColor",LineCol);

    }
}