//the function that runs every tick while the game is running
private void RunGame()
{
//reset ball and remove a life when ball passes paddle on the left side
if (ball.GetPosition().X < -20)
{
redPlayer.SetLives(redPlayer.GetLives() - 1);
ResetBall(true);
//if out of lives
if (redPlayer.GetLives() < 1)
{
currentState = GameStates.GameOver;
redPlayer.SetLives(3);
bluePlayer.SetLives(3);
}
}
//reset ball and remove a life when ball passes paddle on the right side
if (ball.GetPosition().X > 920)
{
bluePlayer.SetLives(bluePlayer.GetLives() - 1);
ResetBall(false);
//if out of lives
if (bluePlayer.GetLives() < 1)
{
currentState = GameStates.GameOver;
redPlayer.SetLives(3);
bluePlayer.SetLives(3);
}
}
//set the current keyboard state
KeyboardState state = Keyboard.GetState();
//RED PLAYER UP
if (state.IsKeyDown(Keys.W) && redPlayer.GetPosition().Y > 0)
{
redPlayer.SetPosition(new Vector2(0, (float)(redPlayer.GetPosition().Y - st.paddle_speed)));
has_moved = true;
}
//RED PLAYER DOWN
if (state.IsKeyDown(Keys.S) && redPlayer.GetPosition().Y < 600 - redPlayer.Height)
{
redPlayer.SetPosition(new Vector2(0, (float)(redPlayer.GetPosition().Y + st.paddle_speed)));
has_moved = true;
}
//BLUE PLAYER UP
if (state.IsKeyDown(Keys.Up) && bluePlayer.GetPosition().Y > 0)
{
bluePlayer.SetPosition(new Vector2(900 - bluePlayer.Width, (float)(bluePlayer.GetPosition().Y - st.paddle_speed)));
has_moved = true;
}
//BLUE PLAYER DOWN
if (state.IsKeyDown(Keys.Down) && bluePlayer.GetPosition().Y < 600 - bluePlayer.Height)
{
bluePlayer.SetPosition(new Vector2(900 - bluePlayer.Width, (float)(bluePlayer.GetPosition().Y + st.paddle_speed)));
has_moved = true;
}
//change ball position
if (has_moved)
{
ball.SetPosition(Vector2.Add(ball.GetPosition(), Vector2.Multiply(ball.GetSpeed(), (float)st.ball_defaultspeed * st.bounce_speed)));
}
//check boundaries of ball position vertically
if (ball.GetPosition().Y >= 600 - ball.Height || ball.GetPosition().Y <= 0)
{
ball.InvertY();
}
//bounce on the red paddle
if (player_turn == false && ball.GetPosition().X < redPlayer.Width && ball.GetPosition().Y > redPlayer.GetPosition().Y - ball.Height && ball.GetPosition().Y < redPlayer.GetPosition().Y + redPlayer.Height)
{
//calculate new direction
double DistanceToMiddle = (redPlayer.GetPosition().Y + redPlayer.Height / 2) - (ball.GetPosition().Y + ball.Height / 2);
double normalizedDistance = DistanceToMiddle / (redPlayer.Height / 2);
//set new direction
ball.SetSpeed(new Vector2((float)Math.Cos(normalizedDistance), (float)-Math.Sin(normalizedDistance)));
//switch player turn
player_turn = !player_turn;
//speed up the ball on bounce
st.bounce_speed *= st.bounce_increase;
}
//bounce on the blue paddle
if (player_turn == true && ball.GetPosition().X > 900 - bluePlayer.Width - ball.Width && ball.GetPosition().X < 900 && ball.GetPosition().Y > bluePlayer.GetPosition().Y - ball.Height && ball.GetPosition().Y < bluePlayer.GetPosition().Y + bluePlayer.Height)
{
//calculate new direction
double DistanceToMiddle = (bluePlayer.GetPosition().Y + bluePlayer.Height / 2) - (ball.GetPosition().Y + ball.Height / 2);
double normalizedDistance = DistanceToMiddle / (bluePlayer.Height / 2);
//set new direction
ball.SetSpeed(new Vector2((float)-Math.Cos(normalizedDistance), (float)-Math.Sin(normalizedDistance)));
//switch player turn
player_turn = !player_turn;
//speed up the ball on bounce
st.bounce_speed *= st.bounce_increase;
}
}
