///<summary>шулуун зурна</summary>
public static void Line(Vector3 a, Vector3 b, Color col = default(Color), float dur = 0)
{
Col.DefBlack(ref col);
Debug.DrawLine(a, b, col, dur);
}
///<summary>цацраг зурна</summary>
public static void Ray(Vector3 a, Vector3 dir, Color col = default(Color), float dur = 0)
{
Col.DefBlack(ref col);
Debug.DrawRay(a, dir, col, dur);
}