public void Draw(Graphics graphics)
{
if (Balls.IsDemolitionBallState())
{
graphics.DrawImage(demolitionImage, location);
}
else
{
graphics.DrawImage(image, location);
}
}
public override void CollisionedBy(CollisionBase collision)
{
// ball out of screen
if (collision.GetType() == Type.GetType("gArkanoid.Entities.OutputLine"))
{
Balls.RemoveBall(this);
}
// ball hit playerpad: invert vertical direction
if (collision.GetType() == Type.GetType("gArkanoid.Entities.PlayerPad"))
{
// check into what part of cPlayerPad is the ball collisioning (left border, pad center, right border)
if (this.X + BALL_WIDTH < collision.Location.X + 20) // left border
{
mov_x -= 1; // fixed direction change
mov_x -= GenerateRandomFactor(); // plus little random direction change
if (mov_x < MIN_SIDE_ONE)
{
mov_x = MIN_SIDE_ONE; // -1.41
}
mov_y = -1 * CalculateSideTwo(mov_x);
}
else if (this.X > collision.Location.X + collision.GetWidth() - 20) // right border
{
mov_x += 1; // fixed direction change
mov_x += GenerateRandomFactor(); // plus little random direction change
if (mov_x > MAX_SIDE_ONE)
{
mov_x = MAX_SIDE_ONE; // 1.41
}
mov_y = -1 * CalculateSideTwo(mov_x);
}
else // pad center
{
mov_y *= -1;
}
}
// ball hit a brick
// detect brick face collisioned, invert ball direction acording to that
// check 4 posibles directions of the ball (UpLeft, UpRight, DownLeft, DownRight)
if (collision.GetType() == Type.GetType("gArkanoid.Entities.Brick"))
{
// no change ball direction if the ball is in demolition state
if (Balls.IsDemolitionBallState())
{
return;
}
int delta_x, delta_y;
if (mov_x < 0 && mov_y < 0) // ball UpLeft
// posibles brick faces colisioned: right, buttom, right&buttom
{
delta_x = (collision.Location.X + collision.GetWidth()) - this.Location.X;
delta_y = (collision.Location.Y + collision.GetHeight()) - this.Location.Y;
if (delta_x > delta_y) // buttom
{
mov_y *= -1;
}
else if (delta_x < delta_y) // right
{
mov_x *= -1;
}
else // both
{
mov_y *= -1; mov_x *= -1;
}
}
else if (mov_x >= 0 && mov_y < 0) // ball UpRight
{
// posibles brick faces colisioned: left, buttom, left&buttom
delta_x = (this.Location.X + this.GetWidth()) - collision.Location.X;
delta_y = (collision.Location.Y + collision.GetHeight()) - this.Location.Y;
if (delta_x > delta_y) // buttom
{
mov_y *= -1;
}
else if (delta_x < delta_y) // left
{
mov_x *= -1;
}
else // both
{
mov_y *= -1; mov_x *= -1;
}
}
else if (mov_x < 0 && mov_y >= 0) // ball DownLeft
{
// posibles brick faces colisioned: right, top, right&top
delta_x = (collision.Location.X + collision.GetWidth()) - this.Location.X;
delta_y = (this.Location.Y + this.GetHeight()) - this.Location.Y;
if (delta_x > delta_y) // top
{
mov_y *= -1;
}
else if (delta_x < delta_y) // right
{
mov_x *= -1;
}
else // both
{
mov_y *= -1; mov_x *= -1;
}
}
else if (mov_x >= 0 && mov_y >= 0) // ball DownRight
{
// posibles brick faces colisioned: left, top, left&top
delta_x = (this.Location.X + this.GetWidth()) - collision.Location.X;
delta_y = (this.Location.Y + this.GetHeight()) - this.Location.Y;
if (delta_x > delta_y) // top
{
mov_y *= -1;
}
else if (delta_x < delta_y) // right
{
mov_x *= -1;
}
else // both
{
mov_y *= -1; mov_x *= -1;
}
}
}
}
