【Unity】unity 鼠标画线

先看一下效果.

代码其实很简单

  private GameObject clone;
    private LineRenderer line;
    private int index;
    public GameObject tf;


    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {

            clone = (GameObject)Instantiate(tf, tf.transform.position, transform.rotation);//克隆一个带有LineRender的物体

            line = clone.GetComponent<LineRenderer>();//获得该物体上的LineRender组件
            line.SetColors(Color.blue, Color.red);//设置颜色
            line.SetWidth(0.2f, 0.1f);//设置宽度
            index = 0;
        }
        if (Input.GetMouseButton(0))
        {
            index++;
            line.SetVertexCount(index);//设置顶点数
            line.SetPosition(index - 1, Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 15)));//设置顶点位置
        }
    }
}