private void MoveBall(double secondsElapsed)
{
lock (_syncRoot)
{
// calculate new position
_ballPosition += _ballDirection * (_ballSpeed * secondsElapsed);
// check for collisions
// up
if(_ballPosition.Y < BallRadius)
{
_ballPosition += new Vector(0, -(_ballPosition.Y - BallRadius));
_ballDirection = _ballDirection.MirrorY();
}
// down
if (_ballPosition.Y > FieldHeight - BallRadius)
{
_ballPosition += new Vector(0, -(_ballPosition.Y - (FieldHeight - BallRadius)));
_ballDirection = _ballDirection.MirrorY();
}
// left player
if (_ballPosition.X < PlayerReach + BallRadius &&
_ballPosition.Y <= _players[LeftPlayer].YPos + (PlayerHeight / 2) && _ballPosition.Y >= _players[LeftPlayer].YPos - (PlayerHeight / 2))
{
_ballPosition += new Vector(-(_ballPosition.X - (BallRadius + PlayerReach)), 0);
_ballDirection = _ballDirection.MirrorX();
// speed things up to make them more interesing
_ballSpeed += BallSpeedIncrease;
}
// right player
if (_ballPosition.X > FieldWidth - (BallRadius + PlayerReach) &&
_ballPosition.Y <= _players[RightPlayer].YPos + (PlayerHeight / 2) && _ballPosition.Y >= _players[RightPlayer].YPos - (PlayerHeight / 2))
{
_ballPosition += new Vector(-(_ballPosition.X - (FieldWidth - (BallRadius + PlayerReach))), 0);
_ballDirection = _ballDirection.MirrorX();
// speed things up to make them more interesing
_ballSpeed += BallSpeedIncrease;
}
// check for scores
if (_ballPosition.X < 0 || _ballPosition.X > FieldWidth)
{
_score[_ballPosition.X < 0 ? RightPlayer : LeftPlayer]++;
// broadcast score message
BroadcastMessage(new ScoreMessage { Score = _score });
//reset ball
var random = new Random();
_ballPosition = new Vector(FieldWidth / 2, BallRadius + random.Next(FieldHeight - 2 * BallRadius));
_ballDirection = Vector.Directions[random.Next(Vector.Directions.Length - 1)];
_ballSpeed = BallStartingSpeedPixPerSecond;
}
// broadcast ball position message
BroadcastMessage(new BallPositionMessage { XPos = (int)_ballPosition.X, YPos = (int)_ballPosition.Y });
}
}
/// <summary>
/// Движение мяча
/// </summary>
/// <param name="secondsElapsed">
/// Сколько секунд прошло
/// </param>
private void MoveBall(double secondsElapsed)
{
lock (_syncRoot)
{
// вычисление новой позиции
_ballPosition += _ballDirection * (_ballSpeed * secondsElapsed);
// проверка столкновений со стенками
// верхняя граница
if(_ballPosition.Y < BallRadius)
{
_ballPosition += new Vector(0, -(_ballPosition.Y - BallRadius));
_ballDirection = _ballDirection.MirrorY();
}
// нижняя граница
if (_ballPosition.Y > FieldHeight - BallRadius)
{
_ballPosition += new Vector(0, -(_ballPosition.Y - (FieldHeight - BallRadius)));
_ballDirection = _ballDirection.MirrorY();
}
// левый игрок
if (_ballPosition.X < PlayerReach + BallRadius &&
_ballPosition.Y <= _players[LeftPlayer].YPos + (PlayerHeight / 2) && _ballPosition.Y >= _players[LeftPlayer].YPos - (PlayerHeight / 2))
{
_ballPosition += new Vector(-(_ballPosition.X - (BallRadius + PlayerReach)), 0);
_ballDirection = _ballDirection.MirrorX();
// speed things up to make them more interesing
_ballSpeed += BallSpeedIncrease;
}
// правый игрок
if (_ballPosition.X > FieldWidth - (BallRadius + PlayerReach) &&
_ballPosition.Y <= _players[RightPlayer].YPos + (PlayerHeight / 2) && _ballPosition.Y >= _players[RightPlayer].YPos - (PlayerHeight / 2))
{
_ballPosition += new Vector(-(_ballPosition.X - (FieldWidth - (BallRadius + PlayerReach))), 0);
_ballDirection = _ballDirection.MirrorX();
// ускорение мяча
_ballSpeed += BallSpeedIncrease;
}
// проверка счета
if (_ballPosition.X < 0 || _ballPosition.X > FieldWidth)
{
_score[_ballPosition.X < 0 ? RightPlayer : LeftPlayer]++;
// отправить игрокам сообщение с текущим счетом
BroadcastMessage(new ScoreMessage { Score = _score });
//'перезагрузить мяч'
var random = new Random();
_ballPosition = new Vector(FieldWidth / 2, BallRadius + random.Next(FieldHeight - 2 * BallRadius));
_ballDirection = Vector.Directions[random.Next(Vector.Directions.Length - 1)];
_ballSpeed = BallStartingSpeedPixPerSecond;
}
// отправить игрокам сообщение с новой позицией мяча
BroadcastMessage(new BallPositionMessage { XPos = (int)_ballPosition.X, YPos = (int)_ballPosition.Y });
}
}