classic game Pong - source, concept

It's a basic concept of the classic game 'Pong' that I've studied.


Initialize the const Screen Width and Height, BallRadius, Pad Width and Height
function - change the ball direction, velocity("direction")
 {
    if "direction" == right: // when going right
        ball_velocity_vector[0] = - ball_velocity_vector[0]  // change the direction 
        ball_velocity_vector[0] += 1 // increase the velocity
        if ball_velocity_vector[1] >= 0: // when touching the screen - y direction
            ball_velocity_vector[1] += 0.3 // also, increase the velocity
        else if ball_velocity_vector[1] < 0
            ball_velocity_vector[1] -= 0.3
    else if ... right...
 }

function - make a new game
{
    pad_velocity = 0 // reset the pad velocity and position
    pad_position = [coord_x, coord_y]
    if player1 win:
        score1 += 1
    else if player2 win:
        score2 += 1}
}

//Loop, printing the pad and ball position through the screen
Loop body
{
    pad1_position += pad1_velocity
    pad2_position += pad2_velocity

    //when the ball touch the pad, collision
    if ball_position[x] touch the screen line 
        if ball_position[y] touch the height of pad
            call the change the ball function("direction") 


    if ball_position is beyond the screen
        initialize the ball_position
        randomly generate the new ball_velocity
        call the function of making a new game
 }