void UpdateBalls()
{
// 1. 先移除临时队列中的所有元素
deadBallList.Clear();
deadFoodList.Clear();
// 2. 刷新每个球
for (int i = 0; i < balls.Count; i++)
{
Ball ball = balls[i];
// 如果球已经死亡，则不再对其判断
if (!ball.isAlive)
{
continue;
}
for (int j = i + 1; j < balls.Count; j++)
{
Ball otherBall = balls[j];
// 如果球已经死亡，则不再对其判断
if (!otherBall.isAlive)
{
continue;
}
float radiusCompare = ball.radius - otherBall.radius;
// 如果两个球大小相等，则不做判断
if (System.Math.Abs(radiusCompare) < BallData.RadiusTolerance)
{
continue;
}
Ball bigBall = (radiusCompare > 0) ? ball : otherBall;
Ball smallBall = (bigBall == ball) ? otherBall : ball;
float distance = Vector3.Distance(ball.position, otherBall.position);
// 当小球的球心进入大球时，则将小球吃掉
if (distance < bigBall.radius)
{
bigBall.Eat(smallBall);
smallBall.BeEaten();
deadBallList.Add(smallBall); // 先将被吃掉的球加入临时队列
}
}
for (int k = 0; k < foods.Count; k++)
{
Food food = foods[k];
if (!food.isAlive)
{
continue;
}
float distance = Vector3.Distance(ball.position, food.position);
if (distance < ball.radius)
{
ball.Eat(food);
food.BeEaten();
deadFoodList.Add(food); // 先将被吃掉的食物加入临时队列
}
}
// 每次外循环最后，如果球还存活，则刷新该球
if (ball.isAlive)
{
ball.Update();
}
}
// 3. 移除所有被吃掉的球和食物，并将该对象置空
for (int i = 0; i < deadBallList.Count; i++)
{
balls.Remove(deadBallList[i]);
deadBallList[i] = null;
}
for (int i = 0; i < deadFoodList.Count; i++)
{
foods.Remove(deadFoodList[i]);
deadFoodList[i] = null;
}
}
