/// <summary>
/// 扩展范围, 负值代表收缩
/// </summary>
public void Expand(Vector3 delta)
{
x.Expand(delta.x);
y.Expand(delta.y);
z.Expand(delta.z);
}
/// <summary>
/// 扩展范围, 负值代表收缩
/// </summary>
public void Expand(Vector2 delta)
{
x.Expand(delta.x);
y.Expand(delta.y);
}