/// <summary>每添加一个圆，就计算一次方向
/// </summary>
public void CalAngleAndconnectTheJumpedCircle()
{
if (CircleSet == null || CircleSet.Count <= 1)
{
return;
}
//取出最后一个对象
PCCircle lastOne = CircleSet.Last();
//倒数第二个
PCCircle lastTwo = CircleSet[CircleSet.Count - 2];
//计算倒数第二个的位置
nfloat last_1_x = lastOne.Center.X;
nfloat last_1_y = lastOne.Center.Y;
nfloat last_2_x = lastTwo.Center.X;
nfloat last_2_y = lastTwo.Center.Y;
// 1.计算角度（反正切函数）
nfloat angle = (nfloat)(Math.Atan2(last_1_y - last_2_y, last_1_x - last_2_x) + Math.PI / 2);
lastTwo.Angle = angle;
// 2.处理跳跃连线
CGPoint center = CenterPointWithPointOne(lastOne.Center, lastTwo.Center);
PCCircle centerCircle = EnumCircleSetToFindWhichSubviewContainTheCenterPoint(center);
if (centerCircle != null)
{
// 把跳过的圆加到数组中，它的位置是倒数第二个
if (!CircleSet.Contains(centerCircle))
{
CircleSet.Insert(CircleSet.Count - 1, centerCircle);
}
}
}
/// <summary>对数组中最后一个对象的处理
/// </summary>
/// <param name="state"></param>
public void CircleSetLastObjectWithState(CircleState state)
{
CircleSet.Last().State = state;
}
