public void Deflection(Brick brick)
{
if (!collided)
{
motion.Y *= -1;
collided = true;
}
}
/// <summary>
/// ��ʼ��һ��2ά���飬����ש����������
/// </summary>
/// <param name="brickArray">��Ҫ������������</param>
/// <param name="columns">ש������</param>
/// <param name="rows">ש������</param>
/// <param name="brickHeight">ÿ��ש��ĸ߶� (����)</param>
/// <param name="brickPadding">ש���϶ (����)</param>
/// <param name="borderPadding">���ÿ��ש��ı� (����)</param>
private void InitializeBricks(Brick[,] brickArray, int columns, int rows, int brickHeight, int brickPadding, int borderPadding, int level)
{
int brickWidth = ((this.Width - borderPadding * 2) / brickColumns) - brickPadding;//���ש����
int columnWidth = ((this.Width - borderPadding * 2) / brickColumns);
int rowHeight = brickHeight + brickPadding;
Random randy = new Random();
for (int j = 0; j < brickRows; j++)
{
for (int i = 0; i < brickColumns; i++)
{
int x = borderPadding + i * columnWidth;
int y = (j * rowHeight) + borderPadding;
brickArray[i, j] = new Brick(x, y, brickWidth, brickHeight, randy, level); //����һ�����ש��
}
}
}
/// <summary>
/// �����������ש���Ƿ�����ײ�������ж���ķ����Ƿ���Ҫ��ת
/// </summary>
/// <param name="ball">��Ҫ������</param>
/// <param name="brick">��Ҫ����ש��</param>
/// <param name="hit">true���������ײ</param>
/// <param name="reverseX">��ֵΪtrueʱ��X�����ٶ���Ҫ����ת</param>
/// <param name="reverseY">��ֵΪtrueʱ��Y�����ٶ���Ҫ����ת</param>
private void DetectBrickCollision(Ball ball, Brick brick, out bool hit, out bool reverseX, out bool reverseY)
{
reverseX = false; //ÿ��ש��ֻ�ܷ�����һ��
reverseY = false;
hit = false;
//����ٶȲ��ܳ�����ֱ���������������������������ֱ�Ӵ�Խש��
//�����ƶ�ʱ����ײ�ж�
if ((ball.YSpeed < 0) //�ж����Ƿ��������ƶ�
&& (ball.Top + ball.YSpeed < brick.Bottom) //�����ƶ�ʱ������ϱ߽�����ٶ����С��ש���±߽������±߽�����ٶȴ���ש���±߽磬��Y��������ײ
&& (ball.Bottom + ball.YSpeed > brick.Bottom)
&& (ball.Right + ball.XSpeed >= brick.Left) //��
&& (ball.Left + ball.XSpeed <= brick.Right)) //��
{
hit = true;
reverseY = true;
}
//�����ƶ�ʱ����ײ�ж�
if ((ball.YSpeed > 0) //�ж����Ƿ��������ƶ�
&& (ball.Bottom + ball.YSpeed > brick.Top) //ͬ�ϣ�������ײ�ж�
&& (ball.Top + ball.YSpeed < brick.Top)
&& (ball.Right + ball.XSpeed >= brick.Left)
&& (ball.Left + ball.XSpeed <= brick.Right))
{
hit = true;
reverseY = true;
}
//�����ƶ�ʱ����ײ�ж�
if ((ball.XSpeed > 0) //�ж����Ƿ��������ƶ�
&& (ball.Left + ball.XSpeed < brick.Left) //ͬ�ϣ�������ײ�ж�
&& (ball.Right + ball.XSpeed > brick.Left)
&& (ball.Bottom + ball.YSpeed >= brick.Top)
&& (ball.Top + ball.YSpeed <= brick.Bottom))
{
hit = true;
reverseX = true;
}
//�����ƶ�ʱ����ײ�ж�
if ((ball.XSpeed < 0) //�ж����Ƿ��������ƶ�
&& (ball.Right + ball.XSpeed > brick.Right) //ͬ�ϣ�������ײ�ж�
&& (ball.Left + ball.XSpeed < brick.Right)
&& (ball.Bottom + ball.YSpeed >= brick.Top)
&& (ball.Top + ball.YSpeed <= brick.Bottom))
{
hit = true;
reverseX = true;
}
if (hit && ball.FromPaddle)
bulletList.RemoveAt(bulletList.IndexOf(ball));
}
/// <summary>
/// �����������ש�����ײ�Ƿ���������������ж����ש������û���������
/// </summary>
/// <param name="ball">Ҫ������</param>
/// <param name="bricks">Ҫ�����Ƿ��е��ߵ�ש��</param>
private void CheckBricks(Ball ball, Brick[,] bricks)
{
bool ultimatelyReverseX = false; //����������ȷ����ֻ����һ��ʱ���ڱ���תһ��
bool ultimatelyReverseY = false; //���������ֱ���ת����ֱ�Ӵ���ש������
foreach (Brick brick in bricks)
{
bool hit, reverseX, reverseY;
if (brick.Strength > 0) //ש��û������ʱ����Ƿ�����ײ
{
//ִ����ײ���
DetectBrickCollision(ball, brick, out hit, out reverseX, out reverseY);
if (hit)
{
brick.Hit(); //��ש���һ��Ѫ
if (brick.Strength == 0)//ש��Ѫ��Ϊ0��ʱ��Ӧ����ʧ
{
CheckBrickForPowerUps(brick); //���ש�����Ƿ����������
brickCount--; //��ש������1
}
score += level * brick.CalculateScore();
brickSound.Play();
if (reverseX) ultimatelyReverseX = true;
if (reverseY) ultimatelyReverseY = true;
}
}
}
if (ultimatelyReverseY) ball.ReverseY();
if (ultimatelyReverseX) ball.ReverseX();
}
/// <summary>
/// ����ײ����ã����ש�����Ƿ����������
/// ����У����߽��ᱻ������Ϸ�е�list powerup
/// </summary>
/// <param name="brick">��Ҫ����ש��</param>
private void CheckBrickForPowerUps(Brick brick)
{
if (brick.powerBall) //�������������Ч
{
int radius = 7; //�����ɵ���İ뾶�������
ballList.Add(new Ball(Brushes.White, radius, brick.Centre.X, brick.Centre.Y, false));
//��������ש����������ɵ�
}
//�������Ҫ������������Ч
string powerUpLabel = null;
Brush powerUpBrush = null;
if (brick.powerShrink)
{
powerUpLabel = "����";
powerUpBrush = Brushes.LightBlue;
}
if (brick.powerStretch)
{
powerUpLabel = "�쳤";
powerUpBrush = Brushes.LightGreen;
}
if (brick.powerMulti)
{
powerUpLabel = "������";
powerUpBrush = Brushes.Pink;
}
if (brick.powerBullet)
{
powerUpLabel = "�ӵ�";
powerUpBrush = Brushes.Red;
}
if (powerUpLabel != null)
{
PowerUp powerup = new PowerUp(powerUpLabel, powerUpBrush, brick.Centre.X, brick.Centre.Y);
powerUpList.Add(powerup);
} //ֻ��ש������������ߵ�����²�����������
}
/// <summary>
/// Called after a collision. Checks the brick to see if it had any powerups inside it
/// If it does, the powerups are added to the list of powerups in play
/// </summary>
/// <param name="brick">The brick to check for powerups</param>
private void CheckBrickForPowerUps(Brick brick)
{
if (brick.powerBall) //extra ball instantly takes effect
{
Random randy = new Random();
int radius = randy.Next(3, 8); //new ball has a random radius
ballList.Add(new Ball(Brushes.Black, radius, brick.Centre.X, brick.Centre.Y, false));
//new ball is created centred at the centre of the old brick
}
//these powerups have to be caught by the paddle
string powerUpLabel = null;
Brush powerUpBrush = null;
if (brick.powerShrink)
{
powerUpLabel = "Shrink";
powerUpBrush = Brushes.LightBlue;
}
if (brick.powerStretch)
{
powerUpLabel = "Stretch";
powerUpBrush = Brushes.LightGreen;
}
if (brick.powerMulti)
{
powerUpLabel = "Multi";
powerUpBrush = Brushes.Pink;
}
if (powerUpLabel != null)
{
PowerUp powerup = new PowerUp(powerUpLabel, powerUpBrush, brick.Centre.X, brick.Centre.Y);
powerUpList.Add(powerup);
} //only add the powerup if a powerup is found in the brick
}
/// <summary>
/// Given a ball and brick, checks if they collide, and whether the direction of the ball should be reversed
/// </summary>
/// <param name="ball">Ball object to check for collision</param>
/// <param name="brick">Brick object to check for collision</param>
/// <param name="hit">True if the ball collides with the brick</param>
/// <param name="reverseX">True if the ball's x-direction should be reversed</param>
/// <param name="reverseY">True if the ball's y-direction should be reversed</param>
private void DetectBrickCollision(Ball ball, Brick brick, out bool hit, out bool reverseX, out bool reverseY)
{
reverseX = false; //each brick can only reverse the ball once
reverseY = false;
hit = false;
//note the velocity of the ball cannot exceed its diameter - or this will not work
//the ball could sail right through the brick
//upwards collision
if ((ball.YSpeed < 0) //is the ball travelling upwards?
&& (ball.Top + ball.YSpeed < brick.Bottom) //is the top of the ball inside the brick?
&& (ball.Bottom + ball.YSpeed > brick.Bottom) //is the bottom of the ball under the brick?
&& (ball.Right + ball.XSpeed >= brick.Left) //is the right of the ball inside the brick
&& (ball.Left + ball.XSpeed <= brick.Right)) //is the left of the ball inside the brick
{
hit = true;
reverseY = true;
}
//downwards collision
if ((ball.YSpeed > 0) //is the ball travelling downwards?
&& (ball.Bottom + ball.YSpeed > brick.Top) //is the bottom of the ball inside the brick (y)
&& (ball.Top + ball.YSpeed < brick.Top) // is the top of the ball about the brick? (y)
&& (ball.Right + ball.XSpeed >= brick.Left)
&& (ball.Left + ball.XSpeed <= brick.Right))// do the x-coords match?
{
hit = true;
reverseY = true;
}
//rightwards collision
if ((ball.XSpeed > 0) //is the ball moving right
&& (ball.Left + ball.XSpeed < brick.Left) //is the left side of the ball to the left of the brick?
&& (ball.Right + ball.XSpeed > brick.Left) //is the right side of the ball inside the brick?
&& (ball.Bottom + ball.YSpeed >= brick.Top)
&& (ball.Top + ball.YSpeed <= brick.Bottom)) // do the y-coords match?
{
hit = true;
reverseX = true;
}
//leftwards collision
if ((ball.XSpeed < 0) //is the ball moving Left?
&& (ball.Right + ball.XSpeed > brick.Right) //is the right side of the ball to the right of the brick?
&& (ball.Left + ball.XSpeed < brick.Right) //is the left side of the ball inside the brick
&& (ball.Bottom + ball.YSpeed >= brick.Top)
&& (ball.Top + ball.YSpeed <= brick.Bottom))// do the y-coords match?
{
hit = true;
reverseX = true;
}
}
/// <summary>
/// Given a ball and brick, checks them for collision
/// if they collide, checks if the brick had powerups inside it
/// </summary>
/// <param name="ball">Ball object to check for collision</param>
/// <param name="bricks">Brick object to check for powerups</param>
private void CheckBricks(Ball ball, Brick[,] bricks)
{
bool ultimatelyReverseX = false; //these variables exist so that the ball can only be reversed
bool ultimatelyReverseY = false; //once per timer tick, otherwise sometimes the ball can be reversed twice
//and plough right through bricks
foreach (Brick brick in bricks)
{
bool hit, reverseX, reverseY;
if (brick.Strength > 0) //only detect collision if the brick hasn't been hit
{
//perform collision detection
DetectBrickCollision(ball, brick, out hit, out reverseX, out reverseY);
if (hit)
{
brick.Hit(); //subtract the strength
if (brick.Strength == 0)
{
CheckBrickForPowerUps(brick); //check if the brick had any powerups
brickCount--; //update the new brickcount
}
score += level * brick.CalculateScore();
brickSound.Play();
if (reverseX) ultimatelyReverseX = true;
if (reverseY) ultimatelyReverseY = true;
}
}
}
if (ultimatelyReverseY) ball.ReverseY();
if (ultimatelyReverseX) ball.ReverseX();
}
private void StartGame()
{
paddle.SetInStartPosition();
ball.SetInStartPosition(paddle.GetBounds());
bricks = new Brick[bricksWide, bricksHigh];
for (int y = 0; y < bricksHigh; y++)
{
Color tint = Color.White;
switch (y)
{
case 0:
tint = Color.Blue;
break;
case 1:
tint = Color.Red;
break;
case 2:
tint = Color.Green;
break;
case 3:
tint = Color.Yellow;
break;
case 4:
tint = Color.Purple;
break;
}
for (int x = 0; x < bricksWide; x++)
{
bricks[x, y] = new Brick(
brickImage,
new Rectangle(
x * brickImage.Width,
y * brickImage.Height,
brickImage.Width,
brickImage.Height),
tint);
}
}
}
