Unity基础（十五）LineRender画线功能

游乐码2026-06-10 23:45

1 LineRender 画线功能组件

Loop是否起点终点自动相

绘制攻击范围武器红外线辅助功能其他画线功能

cs 复制代码

void Start()
{
DrawLineRender(new Vector3(0, 0, 0), 5, 359);
line2=this.gameObject.AddComponent<LineRenderer>();
line2.loop = false;
line2.startWidth = 0.5f;
line2.endWidth = 0.5f;
line2.positionCount= 0;
}

void Update()
{
    if (Input.GetMouseButton(0))
    {
        line2.positionCount += 1;
        //如何得到鼠标转世界坐标的  对应点
        //
        nowPos = Input.mousePosition;
        nowPos.z = 10;
        
        line2.SetPosition(line2.positionCount - 1,Camera.main.ScreenToWorldPoint(nowPos));
    }
}

Corner Vertices 是角顶点圆点此属性指示在一条线中绘制角时使用了多少额外的顶点增加此值，使线角看起来更圆

End Cap Vertices 终点圆角

2 画个圆功能

cs 复制代码

 public void DrawLineRender(Vector3 centerPos, float r, int pointNum)
 {
     //生成空物体 
     GameObject obj = new GameObject();
     obj.name = "R";
     LineRenderer line = obj.AddComponent<LineRenderer>();
     line.loop = false;
     line.positionCount = pointNum;
     float angle = 360f / pointNum;

     for (int i = 0; i < pointNum; i++)
     {
         line.SetPosition(i, centerPos + Quaternion.AngleAxis(angle*i, Vector3.up) * Vector3.forward * r);

     }
 }