由於在控制檯裡面畫圓的時候，SetCursorPosition該函式只接受Int型別的資料  所以位置就會四捨五入，這樣就畫的不正確  所以採用Uniyt中的2D介面繪製的 主要是鞏固math.sin和math.cos函式

  void DrawCircle()
    {
        float x = obj.transform.localPosition.x;
        float y = obj.transform.localPosition.y;

        float radir = 200;
        for (int i = 0; i < 90; i++)
        {
            //第一象限
            Vector3 vc = Vector3.zero;
            vc.x = x + radir * Mathf.Cos(Mathf.PI / 180 * i);
            vc.y = y + radir * Mathf.Sin(Mathf.PI / 180 * i);
            GameObject tmpObj = Instantiate(obj.gameObject);
            tmpObj.transform.parent = obj.transform.parent;
            tmpObj.transform.localPosition = vc;
            tmpObj.transform.localScale = Vector3.one;
            //第四象限
            vc.y = y - radir * Mathf.Sin(Mathf.PI / 180 * i);
            tmpObj = Instantiate(obj.gameObject);
            tmpObj.transform.parent = obj.transform.parent;
            tmpObj.transform.localPosition = vc;
            tmpObj.transform.localScale = Vector3.one;
            //第二象限
            vc = Vector3.zero;
            vc.x = x - radir * Mathf.Cos(Mathf.PI / 180 * i);
            vc.y = y + radir * Mathf.Sin(Mathf.PI / 180 * i);
            tmpObj = Instantiate(obj.gameObject);
            tmpObj.transform.parent = obj.transform.parent;
            tmpObj.transform.localPosition = vc;
            tmpObj.transform.localScale = Vector3.one;

            //第三象限
            vc.y = y - radir * Mathf.Sin(Mathf.PI / 180 * i);
            tmpObj = Instantiate(obj.gameObject);
            tmpObj.transform.parent = obj.transform.parent;
            tmpObj.transform.localPosition = vc;
            tmpObj.transform.localScale = Vector3.one;

        }

    }