BrainGamer Pong

Pong was one of the first video games ever created back in 1972. We’ll build the game step-by-step and use the BrainGamer for its ANALOG Rocker & DIGITAL Buttons to control the paddles.

Prerequisites

You must have a basic understanding of coding read the BrainGamer Intro and have completed the Drawing lesson.

Creating the players

We’ll make this game so 2 people can play, one player will use the Rocker Switch and the other player can use the Buttons on the BrainGamer. We’ll use the DrawFillRect() function to make both players. Since the paddles only move up and down, we’ll create 1 variable for each player to track this position. Place the DrawFillRect() functions inside a while loop so we can check the position every time the program loops. Let’s also Clear() the screen at the top of the while loop and Show() the screen at the bottom.

Python

player1Pos = 30
player2Pos = 30

while True:
    BrainPad.Display.Clear(0)

    BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10)
    BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10)

    BrainPad.Display.Show()
    BrainPad.System.Wait(10)

C#

var player1Pos = 30;
var player2Pos = 30;

while (true){
    BrainPad.Display.Clear(0);

    BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);
    BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

    BrainPad.Display.Show();
    BrainPad.System.Wait(10);
}

JS

var player1Pos = 30;
var player2Pos = 30;

while (true){
    await BrainPad.Display.Clear(0);

    await BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);
    await BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

    await BrainPad.Display.Show();
    await BrainPad.System.Wait(10);
}

Creating the Net

Let’s create the playing field. To start we’ll need to create a net. We can do this by using the DrawLine() function inside of a loop. We’ll also change the value of the net by adding 5 to it. This creates spaces in the net so it looks more like the original game. Add this code just below where we create our players:

Python

player1Pos = 30
player2Pos = 30

while True:
   BrainPad.Display.Clear(0)

   BrainPad.Display.DrawFillRectFillRect(1,10, player1Pos, 2, 10)
   BrainPad.Display.DrawFillRect(1,120, player2Pos, 2, 10)

   net = 0
   while net < 64:
       BrainPad.Display.DrawLine(1,64, net, 64, net + 5)
       net = net + 10

    BrainPad.Display.Show()
    BrainPad.System.Wait(10)

C#

var player1Pos = 30;
var player2Pos = 30;

while (true){
    BrainPad.Display.Clear(0);

    BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);
    BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

var net = 0;
    while (net < 64){
        BrainPad.Display.DrawLine(1,64, net, 64, net + 5);
        net = net + 10;
    }
    BrainPad.Display.Show();
    BrainPad.System.Wait(10);
}

JS

var player1Pos = 30;
var player2Pos = 30;

while (true){
    await BrainPad.Display.Clear(0);

    await BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);
    await BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

var net = 0;
    while (net < 64){
        await BrainPad.Display.DrawLine(1,64, net, 64, net + 5);
        net = net + 10;
    }
    await BrainPad.Display.Show();
    await BrainPad.System.Wait(10);
}

Moving the players Analog vs Digital

Let’s start by moving the 2nd player first. We’ll use the DIGITAL buttons on the BrainGamer for this. Place this code just about where we created the player2 using DrawFillRect(). Let’s also add code to keep the paddle on the screen.

Moving player2 Digital Buttons

Python

Gamer = BrainGamer(BrainPad)

#Player Two
if (Gamer.ButtonUp()): player2Pos = player2Pos - 4  
if (Gamer.ButtonDown()): player2Pos = player2Pos + 4

#Keep Player on Screen
if (player2Pos < 5): player2Pos = 5
if (player2Pos > 50): player2Pos = 50

#Draw Player 2
BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10)

C#

var BrainGamer = new BrainGamer(BrainPad); 

//Player Two
if (BrainGamer.ButtonUp()) player2Pos = player2Pos - 4;  
if (BrainGamer.ButtonDown()) player2Pos = player2Pos + 4;

//Player Two Stay on Screen
if (player2Pos < 5) player2Pos = 5;
if (player2Pos > 50) player2Pos = 50;

#Draw Player 2
BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

JS

var Gamer = new BrainGamer(BrainPad); 

//BrainGamer Driver 

//Player Two
if (await Gamer.ButtonUp()) player2Pos = player2Pos - 4;
if (await Gamer.ButtonDown()) player2Pos = player2Pos + 4;

//Player Two Stay on Screen
if (player2Pos < 5) player2Pos = 5;
if (player2Pos > 50) player2Pos = 50;

await BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

Moving player1 Analog Rocker

To move Player 1 we’ll use the ANALOG Rocker switch on the BrainGamer.

Python

#Player One
if (Gamer.RockerY() < 40):player1Pos = player1Pos - 4  
if (Gamer.RockerY() > 60):player1Pos = player1Pos + 4

#Player One Stay on Screen
if (player1Pos < 5): player1Pos = 5
if (player1Pos > 50): player1Pos = 50

#Draw Player One
BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10)

C#

//Player One
if (BrainGamer.RockerY() < 40)player1Pos = player1Pos - 4;
if (BrainGamer.RockerY() > 60)player1Pos = player1Pos + 4;

//Player One Stay on Screen
if (player1Pos < 5) player1Pos = 5;
if (player1Pos > 50) player1Pos = 50;

//Draw Player One
BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);

JS

var Gamer = new BrainGamer(BrainPad); 

//BrainGamer Driver 

//Player One
 
if (await Gamer.RockerY() < 40) player1Pos = player1Pos - 4;
if (await Gamer.RockerY() > 60) player1Pos = player1Pos + 4;

//Player One Stay on Screen
if (player1Pos < 5) player1Pos = 5;
if (player1Pos > 50) player1Pos = 50;

await BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);

When we play our game, it will be DIGITAL (buttons) vs ANALOG (rocker). Which do you like better? If you’d like to know more about Digital or Analog, check out their respective lessons.

Here is the complete code we have created so far.

Python

player1Pos = 30
player2Pos = 30
ballPosX = 10
ballPosY = 10
offsetX = 2
offsetY = 2

availablePort = DUELinkController.GetConnectionPort()
BrainPad = DUELinkController(availablePort)

Gamer = BrainGamer(BrainPad)


while True:
    BrainPad.Display.Clear(0)

    #Move Player One
    if (Gamer.RockerY() < 40): player1Pos = player1Pos - 4  
    if (Gamer.RockerY() > 60): player1Pos = player1Pos + 4

    #Keep Player on Screen
    if (player1Pos < 5): player1Pos = 5
    if (player1Pos > 50): player1Pos = 50

    #Draw Player 1
    BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10)

    #Move Player Two
    if (Gamer.ButtonUp()):player2Pos = player2Pos - 4  
    if (Gamer.ButtonDown()):player2Pos = player2Pos + 4

    #Keep Player on Screen
    if (player2Pos < 5):player2Pos = 5
    if (player2Pos > 50):player2Pos = 50

    #Draw Player 2
    BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10)

    #Draw the Net
    net = 0
    while net < 64:
       BrainPad.Display.DrawLine(1,64, net, 64, net + 5)
       net = net + 10

    BrainPad.Display.Show()
    BrainPad.System.Wait(10)

C#

using GHIElectronics.DUELink;

var availablePort = DUELinkController.GetConnectionPort();
var BrainPad = new DUELinkController(availablePort);

var BrainGamer = new BrainGamer(BrainPad);

var player1Pos = 30;
var player2Pos = 30;

while (true)
{
    BrainPad.Display.Clear(0);

    //Player One
    if (BrainGamer.RockerY() < 40) player1Pos = player1Pos - 4;
    if (BrainGamer.RockerY() > 60) player1Pos = player1Pos + 4;

    //Player One Stay on Screen
    if (player1Pos < 5) player1Pos = 5;
    if (player1Pos > 50) player1Pos = 50;

    BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);

    //Player Two
    if (BrainGamer.ButtonUp()) player2Pos = player2Pos - 4;
    if (BrainGamer.ButtonDown()) player2Pos = player2Pos + 4;

    //Player Two Stay on Screen
    if (player2Pos < 5) player2Pos = 5;
    if (player2Pos > 50) player2Pos = 50;

    BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

    var net = 0;

    while (net < 64){
        BrainPad.Display.DrawLine(1, 64, net, 64, net + 5);
        net = net + 10;
    }

    BrainPad.Display.Show();
    BrainPad.System.Wait(10);
}

JS

import { SerialUSB } from './serialusb.js';
import * as due from './duelink.js';

let BrainPad = new due.DUELinkController(new SerialUSB());
await BrainPad.Connect();

///BrainGaner Driver

var Gamer = new BrainGamer(BrainPad);

var player1Pos = 30;
var player2Pos = 30;

while (true)
{
    await BrainPad.Display.Clear(0);

    //Player One
    if (await Gamer.RockerY() < 40) player1Pos = player1Pos - 4;
    if (await Gamer.RockerY() > 60) player1Pos = player1Pos + 4;

    //Player One Stay on Screen
    if (player1Pos < 5) player1Pos = 5;
    if (player1Pos > 50) player1Pos = 50;

    await BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);

    //Player Two
    if (await Gamer.ButtonUp()) player2Pos = player2Pos - 4;
    if (await Gamer.ButtonDown()) player2Pos = player2Pos + 4;

    //Player Two Stay on Screen
    if (player2Pos < 5) player2Pos = 5;
    if (player2Pos > 50) player2Pos = 50;

    await BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

    var net = 0;

    while (net < 64){
        await BrainPad.Display.DrawLine(1, 64, net, 64, net + 5);
        net = net + 10;
    }

    await BrainPad.Display.Show();
    await BrainPad.System.Wait(10);
}

Adding a ball

We’ve got our players moving and we created a net. We can’t play without a ball, so let’s add that now. First, we need to create variables to keep track of the coordinates and speed of the ball. Add the following variables just below our player1Pos and player2Pos variables:

Python

player1Pos = 30
player2Pos = 30

ballPosX = 15
ballPosY = 15
offsetX = 2
offsetY = 2

C#

var player1Pos = 30;
var player2Pos = 30;

var ballPosX = 15;
var ballPosY = 15;
var offsetX = 2;
var offsetY = 2;

JS

var player1Pos = 30;
var player2Pos = 30;

var ballPosX = 15;
var ballPosY = 15;
var offsetX = 2;
var offsetY = 2;

Now that we’ve created the variables to track our ball, we can add some code to move it and draw it. Add the following inside our while loop just below the Clear() function at the top of the while loop. Use DrawCircle() to create our ball.

Python

BrainPad.Display.Clear(0)

#Move Ball
ballPosX = ballPosX + offsetX
ballPosY = ballPosY + offsetY

#Draw Ball
BrainPad.Display.DrawCircle(1,ballPosX, ballPosY, 3)

C#

BrainPad.Display.Clear(0);

//Move Ball
ballPosX = ballPosX + offsetX;
ballPosY = ballPosY + offsetY;

//Draw Ball
BrainPad.Display.DrawCircle(1,ballPosX, ballPosY, 3);

JS

await BrainPad.Display.Clear(0);

//Move Ball
ballPosX = ballPosX + offsetX;
ballPosY = ballPosY + offsetY;

//Draw Ball
await BrainPad.Display.DrawCircle(1,ballPosX, ballPosY, 3);

Bouncing off the Walls

Our ball moves, except it moves right off the screen! We need to add an if-statement to detect when the ball hits a wall so that it will bounce off.

Python

BrainPad.Display.Clear(0)

#Move Ball
ballPosX = ballPosX + offsetX
ballPosY = ballPosY + offsetY

#Bounce off Walls
if ballPosY < 5 or ballPosY > 55: 
     offsetY  = offsetY * -1

#Draw Ball
    BrainPad.Display.DrawCircle(1,ballPosX, ballPosY, 3)

C#

BrainPad.Display.Clear(0);

//Move Ball
ballPosX = ballPosX + offsetX;
ballPosY = ballPosY + offsetY;

//Bounce off Walls
if (ballPosY < 5 || ballPosY > 55){
     offsetY = offsetY * -1;
}

//Draw Ball
    BrainPad.Display.DrawCircle(1,ballPosX, ballPosY, 3);

JS

await BrainPad.Display.Clear(0);

//Move Ball
ballPosX = ballPosX + offsetX;
ballPosY = ballPosY + offsetY;

//Bounce off Walls
if (ballPosY < 5 || ballPosY > 55) {
  offsetY = offsetY * -1;
}

//Draw Ball
await BrainPad.Display.DrawCircle(1, ballPosX, ballPosY, 3);

Collision Detection

Now our ball bounces off the walls. Next, we must add some code to detect when the ball hits a player’s paddle. Using an if-statement, let’s detect the player2 side first. We only want to check when the ball is near the paddle. So we create an if-statement to check ballPosX position, then we’ll use another if-statement inside that to see if the ball hits the player2 paddle.

Let’s also add an else condition to our second if-statement to do something if the ball is missed. Remember that the comments added here will not interfere with the code.

Python

#Check Collision with Player 2
    if ballPosX > 118:
        if ballPosY >= player2Pos - 1 and ballPosY <= player2Pos + 12:
            #Add code here when player hits ball 
            offsetX = offsetX * -1      
        else:
            #Add code here when player misses

C#

//Check Ball Collision with Player 2
 if (ballPosX > 117){
     if (ballPosY >= player2Pos - 1 && ballPosY <= player2Pos + 12){
         offsetX = offsetX * -1;
         //Add code here when player hits ball
     }
     else{
         //Add code here when player misses
     }
 }

JS

//Check Ball Collision with Player 2
 if (ballPosX > 117){
     if (ballPosY >= player2Pos - 1 && ballPosY <= player2Pos + 12){
         offsetX = offsetX * -1;
         //Add code here when player hits ball
     }
     else{
         //Add code here when player misses
     }
 }

Before we add what happens when we miss the ball, let’s add the code to detect hitting the player1 paddle just below the player2 code we just created. Let’s also add:

Python

if ballPosX < 12:
    offsetX = offsetX * -1
    if ballPosY >= player1Pos - 1 and ballPosY <= player1Pos + 12:
        #Add code here when player hits ball  
    else:
        #Add code here when player misses

C#

//Check Ball Collision with Player 1
if (ballPosX < 12){    
    if (ballPosY >= player1Pos - 1 && ballPosY <= player1Pos + 12){
        offsetX = offsetX * -1;
        //Add code here when player hits ball
    }
    else{
        //Add code here when player misses
    }
}

JS

//Check Ball Collision with Player 1
if (ballPosX < 12){    
    if (ballPosY >= player1Pos - 1 && ballPosY <= player1Pos + 12){
        offsetX = offsetX * -1;
        //Add code here when player hits ball
    }
    else{
        //Add code here when player misses
    }
}

Now that we have the basic functionality we can add scoring to the game. We’ll come back and increase the score based on which player misses the ball, but first let’s create those variables. Place the following with the other variables near the top of the code that we created earlier.

Python

player1Score = 0
player2Score = 0

C#

var player1Score = 0;
var player2Score = 0;

JS

var player1Score = 0;
var player2Score = 0;

We have the variables for a score, now let’s show them on the screen. Add Text() function code just above the Show() function at the bottom of our while loop.

Python

BrainPad.Display.Clear(0)
BrainPad.Display.DrawText(player1Score.ToString(), 1, 50, 5) BrainPad.Display.DrawText(player2Score.ToString(), 1, 70, 5)

C#

BrainPad.Display.Clear(0);
  BrainPad.Display.DrawText(player1Score.ToString(), 1, 50, 5);    BrainPad.Display.DrawText(player2Score.ToString(), 1, 70 5);

JS

await BrainPad.Display.Clear(0);
await BrainPad.Display.DrawText(player1Score.toString(), 1, 50, 5);    
await BrainPad.Display.DrawText(player2Score.toString(), 1, 70 5);

Let’s increase the score of a player when the other player misses. We’ll do this inside the else condition in the if-statement we created to detect a collision, where we placed our Add Code comments. Let’s also add a sound using Beep() so we know when a player scores, and BrainGamer.Vibrator() when they miss.

Python

#Check Collision with Player 2
    if ballPosX > 118:
        if ballPosY >= player2Pos - 1 and ballPosY <= player2Pos + 12:
            #Add code here when player hits ball 
            offsetX = offsetX * -1 
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)   
        else:
            #Add code here when player misses
            player1Score = player1Score + 1
            Gamer.Vibrator(1)
            BrainPad.System.Wait(100)
            Gamer.Vibrator(0)
            ballPosX = 15

    #Check Collision with Player 1
    if ballPosX < 12:    
        if  ballPosY >= player1Pos - 1 and ballPosY <= player1Pos + 12:
            #Add code here when player hits ball 
            offsetX = offsetX * -1
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)
        else:
            #Add code here when player misses
            player2Score = player2Score + 1
            Gamer.Vibrator(1)
            BrainPad.System.Wait(100)
            Gamer.Vibrator(0)
            ballPosX = 115

C#

 //Check Collision with Player 2
    if (ballPosX > 118) {
        if (ballPosY >= player2Pos - 1 && ballPosY <= player2Pos + 12){
            //Add code here when player hits ball
            offsetX = offsetX * -1;
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        }
        else {
            //Add code here when player misses ball
            player1Score = player1Score + 1;
            BrainGamer.Vibrator(true);
            BrainPad.System.Wait(100);
            BrainGamer.Vibrator(false);
            ballPosX = 15;
        }
    }
    //Check Collision with Player 1
    if (ballPosX < 12) {
        if (ballPosY >= player1Pos - 1 && ballPosY <= player1Pos + 12){
            //Add code here when player hits ball
            offsetX = offsetX * -1;
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        }
        else {
            //Add code here when player misses ball
            player2Score = player2Score + 1;
            BrainGamer.Vibrator(true);
            BrainPad.System.Wait(100);
            BrainGamer.Vibrator(false);
            ballPosX = 115;
        }
    }

JS

//Check Collision with Player 2
 if (ballPosX > 118) {
     if (ballPosY >= player2Pos - 1 && ballPosY <= player2Pos + 12) {
         //Add code here when player hits ball
         offsetX = offsetX * -1;
         await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
    } else {
       //Add code here when player misses ball
        player1Score = player1Score + 1;
        await Gamer.Vibrator(true);
        await BrainPad.System.Wait(100);
        await Gamer.Vibrator(false);
        ballPosX = 15;
    }
}
//Check Collision with Player 1
if (ballPosX < 12) {
    if (ballPosY >= player1Pos - 1 && ballPosY <= player1Pos + 12) {
        //Add code here when player hits ball
        offsetX = offsetX * -1;
        await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
    }
    else {
        //Add code here when player misses ball
        player2Score = player2Score + 1;
        await Gamer.Vibrator(true);
        await BrainPad.System.Wait(100);
        await Gamer.Vibrator(false);
        ballPosX = 115;
        }
    }   
}

Winning the Game

Now let’s add some code to find a winner. If any player reaches 5, they win. We’ll create a variable called winner and set it to true once someone has won the game. Then we’ll use that variable to tell us when to play a sound. Add this code just above our Show() and Wait() functions at the bottom of the while loop.

Python

winner = False

if (player1Score == 5):
        BrainPad.Display.Clear(0)
        BrainPad.Display.DrawTextScale("Player 1", 1, 5, 0, 2, 2)
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2)
        BrainPad.Display.Show()
        winner = True

    if (player2Score == 5):
        BrainPad.Display.Clear(0)
        BrainPad.Display.DrawTextScale("Player 2", 1, 5, 0, 2, 2)
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2)
        BrainPad.Display.Show()
        winner = True

    BrainPad.Display.Show()
    BrainPad.System.Wait(10)

C#

var winner = false; 


    if (player1Score == 5){
        BrainPad.Display.Clear(0);
        BrainPad.Display.DrawTextScale("Player 1", 1, 5, 0, 2, 2);
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        BrainPad.Display.Show();
        winner = true;
    }

    if (player2Score == 5){
        BrainPad.Display.Clear(0);
        BrainPad.Display.DrawTextScale("Player 2", 1, 5, 0, 2, 2);
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        BrainPad.Display.Show();
        winner = true;
    }

    BrainPad.Display.Show();
    BrainPad.System.Wait(10);

JS

if (player1Score == 5) {
        await BrainPad.Display.Clear(0);
        await BrainPad.Display.DrawTextScale("Player 1", 1, 5, 0, 2, 2);
        await BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        await BrainPad.Display.Show();
        await BrainPad.System.Wait(2000);
        winner = true;
    }

    if (player2Score == 5) {
        await BrainPad.Display.Clear(0);
        await BrainPad.Display.DrawTextScale("Player 2", 1, 5, 0, 2, 2);
        await BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        await BrainPad.Display.Show();
        await BrainPad.System.Wait(2000);
        winner = true;
    }

Finally, let’s use the foundWinner variable to tell us when to play a victory tune. We can add this at the very bottom of the while loop.

Python

if (winner):
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 200, 100)
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)
        BrainPad.System.Wait(2000)

       #Reset the game
        player1Pos = 30
        player2Pos = 30
        player1Score = 0
        player2Score = 0
        ballPosX = 15
        ballPosY = 15
        offsetX = 2
        offsetY = 2
        winner = False

C#

if (winner == 1){
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 200, 100);
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        BrainPad.System.Wait(2000);

       //Reset the game
        player1Pos = 30;
        player2Pos = 30;
        player1Score = 0;
        player2Score = 0;
        ballPosX = 15;
        ballPosY = 15;
        offsetX = 2;
        offsetY = 2;
        winner = 0;
    }

JS

 if (winner == 1) {
        await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        await BrainPad.System.Beep(BrainPad.Pin.Piezo, 200, 100);
        await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        await BrainPad.System.Wait(2000);

        //Reset the game
        player1Pos = 30;
        player2Pos = 30;
        player1Score = 0;
        player2Score = 0;
        ballPosX = 15;
        ballPosY = 10;
        offsetX = 2;
        offsetY = 2;
        winner = 0;
    }

Final Results

Congratulations, you’ve coded Pong…the classic first video game ever created!

Python

#############################
###   BrainGamer Driver   ###
#############################
from DUELink.DUELinkController import DUELinkController
class BrainGamer:
    def __init__(self, brainpad:DUELinkController):
        self.BrainPad = brainpad
    def RocketX(self)-> int:
        x = self.BrainPad.Analog.Read(4)
        return x    
    def RockerY(self)-> int: 
        y = self.BrainPad.Analog.Read(3)
        return y
    ### Vibrator ###
    def Vibrator(self, enable: bool):
        self.BrainPad.Digital.Write(8, not enable)
        return
    ### Read Buttons ###
    def ButtonUp(self):
        u =  not self.BrainPad.Digital.Read(14,1)
        return u
    def ButtonDown(self):
        d =  not self.BrainPad.Digital.Read(15,1)
        return d
    def ButtonLeft(self):
        l = not self.BrainPad.Digital.Read(13,1)
        return l
    def ButtonRight(self):
        r = not self.BrainPad.Digital.Read(16,1)
        return r   

from DUELink.DUELinkController import DUELinkController
availablePort = DUELinkController.GetConnectionPort()
BrainPad = DUELinkController(availablePort)

player1Pos = 30
player2Pos = 30
ballPosX = 15
ballPosY = 15
offsetX = 2
offsetY = 2
player1Score = 0
player2Score = 0
winner = False

Gamer = BrainGamer(BrainPad)

while True:
    BrainPad.Display.Clear(0)

    BrainPad.Display.DrawText(player1Score, 1, 50, 5)
    BrainPad.Display.DrawText(player2Score, 1, 70, 5)

    #Check Collision with Player 2
    if ballPosX > 118:
        if ballPosY >= player2Pos - 1 and ballPosY <= player2Pos + 12:
            #Add code here when player hits ball 
            offsetX = offsetX * -1 
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)   
        else:
            #Add code here when player misses
            player1Score = player1Score + 1
            Gamer.Vibrator(1)
            BrainPad.System.Wait(100)
            Gamer.Vibrator(0)
            ballPosX = 15

    #Check Collision with Player 1
    if ballPosX < 12:    
        if  ballPosY >= player1Pos - 1 and ballPosY <= player1Pos + 12:
            #Add code here when player hits ball 
            offsetX = offsetX * -1
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)
        else:
            #Add code here when player misses
            player2Score = player2Score + 1
            Gamer.Vibrator(1)
            BrainPad.System.Wait(100)
            Gamer.Vibrator(0)
            ballPosX = 115
        
    #Move Ball
    ballPosX = ballPosX + offsetX
    ballPosY = ballPosY + offsetY

    #Bounce off Walls
    if ballPosY < 5 or ballPosY > 55: 
        offsetY  = offsetY * -1

    #Draw Ball
    BrainPad.Display.DrawCircle(1,ballPosX, ballPosY, 3)

    #Move Player One
    if (Gamer.RockerY() < 40): player1Pos = player1Pos - 4  
    if (Gamer.RockerY() > 60): player1Pos = player1Pos + 4

    #Keep Player on Screen
    if (player1Pos < 5): player1Pos = 5
    if (player1Pos > 50): player1Pos = 50

    #Draw Player 1
    BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10)

    #Move Player Two
    if (Gamer.ButtonUp()):player2Pos = player2Pos - 4  
    if (Gamer.ButtonDown()):player2Pos = player2Pos + 4

    #Keep Player on Screen
    if (player2Pos < 5):player2Pos = 5
    if (player2Pos > 50):player2Pos = 50

    #Draw Player 2
    BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10)

    #Draw the Net
    net = 0
    while net < 64:
       BrainPad.Display.DrawLine(1,64, net, 64, net + 5)
       net = net + 10

    if (player1Score == 5):
        BrainPad.Display.Clear(0)
        BrainPad.Display.DrawTextScale("Player 1", 1, 5, 0, 2, 2)
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2)
        BrainPad.Display.Show()
        winner = True

    if (player2Score == 5):
        BrainPad.Display.Clear(0)
        BrainPad.Display.DrawTextScale("Player 2", 1, 5, 0, 2, 2)
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2)
        BrainPad.Display.Show()
        winner = True

    BrainPad.Display.Show()
    BrainPad.System.Wait(10)
    
    if (winner):
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 200, 100)
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100)
        BrainPad.System.Wait(2000)

       #Reset the game
        player1Pos = 30
        player2Pos = 30
        player1Score = 0
        player2Score = 0
        ballPosX = 15
        ballPosY = 15
        offsetX = 2
        offsetY = 2
        winner = False

C#

using GHIElectronics.DUELink;

Console.WriteLine("Hello BrainPad!");
var availablePort = DUELinkController.GetConnectionPort();
var BrainPad = new DUELinkController(availablePort);
var BrainGamer = new BrainGamer(BrainPad);
var player1Pos = 30;
var player2Pos = 30;
var ballPosX = 15;
var ballPosY = 10;
var offsetX = 2;
var offsetY = 2;
var player1Score = 0;
var player2Score = 0;
var winner = false;

while (true){

    BrainPad.Display.Clear(0);

    BrainPad.Display.DrawText(player1Score.ToString(), 1, 50, 5);
    BrainPad.Display.DrawText(player2Score.ToString(), 1, 70, 5);

    //Check Collision with Player 2
    if (ballPosX > 118) {
        if (ballPosY >= player2Pos - 1 && ballPosY <= player2Pos + 12){
            //Add code here when player hits ball
            offsetX = offsetX * -1;
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        }
        else {
            //Add code here when player misses ball
            player1Score = player1Score + 1;
            BrainGamer.Vibrator(true);
            BrainPad.System.Wait(100);
            BrainGamer.Vibrator(false);
            ballPosX = 15;
        }
    }
    //Check Collision with Player 1
    if (ballPosX < 12) {
        if (ballPosY >= player1Pos - 1 && ballPosY <= player1Pos + 12){
            //Add code here when player hits ball
            offsetX = offsetX * -1;
            BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        }
        else {
            //Add code here when player misses ball
            player2Score = player2Score + 1;
            BrainGamer.Vibrator(true);
            BrainPad.System.Wait(100);
            BrainGamer.Vibrator(false);
            ballPosX = 115;
        }
    }

    //Move Ball
    ballPosX = ballPosX + offsetX;
    ballPosY = ballPosY + offsetY;

    //Bounce off Walls
    if (ballPosY < 5 || ballPosY > 55){
        offsetY = offsetY * -1;
    }

    //Draw Ball
    BrainPad.Display.DrawCircle(1, ballPosX, ballPosY, 3);

    //Player One
    if (BrainGamer.RockerY() < 40) player1Pos = player1Pos - 4;
    if (BrainGamer.RockerY() > 60) player1Pos = player1Pos + 4;

    //Player One Stay on Screen
    if (player1Pos < 5) player1Pos = 5;
    if (player1Pos > 50) player1Pos = 50;

    BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);

    //Player Two
    if (BrainGamer.ButtonUp()) player2Pos = player2Pos - 4;
    if (BrainGamer.ButtonDown()) player2Pos = player2Pos + 4;

    //Player Two Stay on Screen
    if (player2Pos < 5) player2Pos = 5;
    if (player2Pos > 50) player2Pos = 50;

    BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

    var net = 0;

    while (net < 64){
        BrainPad.Display.DrawLine(1, 64, net, 64, net + 5);
        net = net + 10;
    }

    if (player1Score == 5){
        BrainPad.Display.Clear(0);
        BrainPad.Display.DrawTextScale("Player 1", 1, 5, 0, 2, 2);
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        BrainPad.Display.Show();
        winner = true;
    }

    if (player2Score == 5){
        BrainPad.Display.Clear(0);
        BrainPad.Display.DrawTextScale("Player 2", 1, 5, 0, 2, 2);
        BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        BrainPad.Display.Show();
        winner = true;
    }

    BrainPad.Display.Show();
    BrainPad.System.Wait(10);

    if (winner){
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 200, 100);
        BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        BrainPad.System.Wait(2000);

       //Reset the game
        player1Pos = 30;
        player2Pos = 30;
        player1Score = 0;
        player2Score = 0;
        ballPosX = 15;
        ballPosY = 15;
        offsetX = 2;
        offsetY = 2;
        winner = false;
    }   
}
///////////////////////////
///  BrainGamer Driver  ///
///////////////////////////
class BrainGamer
{
    DUELinkController BrainPad;
    public BrainGamer(DUELinkController brainpad){
        BrainPad = brainpad;
    }
    public int RockerX(){
        var x = BrainPad.Analog.Read(4);
        return (x);
    }
    public int RockerY(){
        var y = BrainPad.Analog.Read(3);
        return (y);
    }
    public void Vibrator(bool enable){
        BrainPad.Digital.Write(8, !enable);
    }
    public bool ButtonUp(){
        return !BrainPad.Digital.Read(14, BrainPad.Pin.PullUp);
    }
    public bool ButtonDown(){
        return !BrainPad.Digital.Read(15, BrainPad.Pin.PullUp);
    }
    public bool ButtonLeft(){
        return !BrainPad.Digital.Read(13, BrainPad.Pin.PullUp);
    }
    public bool ButtonRight(){
        return !BrainPad.Digital.Read(16, BrainPad.Pin.PullUp);
    }
}

JS

import { SerialUSB } from './serialusb.js';
import * as due from './duelink.js';

let BrainPad = new due.DUELinkController(new SerialUSB());
await BrainPad.Connect();


class BrainGamer {
    constructor(brainpad) {
        this.BrainPad = brainpad;
    }

    RockerX() {
        var x = this.BrainPad.Analog.Read(4);
        return x;
    }

    RockerY() {
        var y = this.BrainPad.Analog.Read(3);
        return y;
    }

    async Vibrator(enable) {
        await this.BrainPad.Digital.Write(8, !enable);
    }

    async ButtonUp() {
        return !await this.BrainPad.Digital.Read(14, this.BrainPad.Pin.PullUp);
    }

    async ButtonDown() {
        return !await this.BrainPad.Digital.Read(15, this.BrainPad.Pin.PullUp);
    }

    async ButtonLeft() {
        return !await this.BrainPad.Digital.Read(13, this.BrainPad.Pin.PullUp);
    }

    async ButtonRight() {
        return !await this.BrainPad.Digital.Read(16, this.BrainPad.Pin.PullUp);
    }
}

var Gamer = new BrainGamer(BrainPad);

var player1Pos = 30;
var player2Pos = 30;

var ballPosX = 15;
var ballPosY = 10;
var offsetX = 2;
var offsetY = 2;

var player1Score = 0;
var player2Score = 0;

var winner = false;

await BrainPad.Display.Clear(0);


while (true) {
    await BrainPad.Display.Clear(0);
    await BrainPad.Display.DrawText(player1Score.toString(), 1, 50, 5);
    await BrainPad.Display.DrawText(player2Score.toString(), 1, 70, 5);

    //Move Ball
    ballPosX = ballPosX + offsetX;
    ballPosY = ballPosY + offsetY;

    //Bounce off Walls
    if (ballPosY < 5 || ballPosY > 55) {
        offsetY = offsetY * -1;
    }

    //Draw Ball
    await BrainPad.Display.DrawCircle(1, ballPosX, ballPosY, 3);

    //Check Collision with Player 2
    if (ballPosX > 118) {
        if (ballPosY >= player2Pos - 1 && ballPosY <= player2Pos + 12) {
            //Add code here when player hits ball
            offsetX = offsetX * -1;
            await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        }
        else {
            //Add code here when player misses ball
            player1Score = player1Score + 1;
            await Gamer.Vibrator(true);
            await BrainPad.System.Wait(100);
            await Gamer.Vibrator(false);
            ballPosX = 15;
        }
    }
    //Check Collision with Player 1
    if (ballPosX < 12) {
        if (ballPosY >= player1Pos - 1 && ballPosY <= player1Pos + 12) {
            //Add code here when player hits ball
            offsetX = offsetX * -1;
            await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        }
        else {
            //Add code here when player misses ball
            player2Score = player2Score + 1;
            await Gamer.Vibrator(true);
            await BrainPad.System.Wait(100);
            await Gamer.Vibrator(false);
            ballPosX = 115;
        }
    }

    if (player1Score == 5) {
        await BrainPad.Display.Clear(0);
        await BrainPad.Display.DrawTextScale("Player 1", 1, 5, 0, 2, 2);
        await BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        await BrainPad.Display.Show();
        await BrainPad.System.Wait(2000);
        winner = true;
    }

    if (player2Score == 5) {
        await BrainPad.Display.Clear(0);
        await BrainPad.Display.DrawTextScale("Player 2", 1, 5, 0, 2, 2);
        await BrainPad.Display.DrawTextScale("WINS!", 1, 25, 20, 2, 2);
        await BrainPad.Display.Show();
        await BrainPad.System.Wait(2000);
        winner = true;
    }

    if (winner == 1) {
        await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        await BrainPad.System.Beep(BrainPad.Pin.Piezo, 200, 100);
        await BrainPad.System.Beep(BrainPad.Pin.Piezo, 256, 100);
        await BrainPad.System.Wait(2000);

        //Reset the game
        player1Pos = 30;
        player2Pos = 30;
        player1Score = 0;
        player2Score = 0;
        ballPosX = 15;
        ballPosY = 10;
        offsetX = 2;
        offsetY = 2;
        winner = 0;
    }


    //Player One
    if (await Gamer.RockerY() < 40) player1Pos = player1Pos - 4;
    if (await Gamer.RockerY() > 60) player1Pos = player1Pos + 4;

    //Player One Stay on Screen
    if (player1Pos < 5) player1Pos = 5;
    if (player1Pos > 50) player1Pos = 50;

    await BrainPad.Display.DrawFillRect(1, 10, player1Pos, 2, 10);

    //Player Two
    if (await Gamer.ButtonUp()) player2Pos = player2Pos - 4;
    if (await Gamer.ButtonDown()) player2Pos = player2Pos + 4;

    //Player Two Stay on Screen
    if (player2Pos < 5) player2Pos = 5;
    if (player2Pos > 50) player2Pos = 50;

    await BrainPad.Display.DrawFillRect(1, 120, player2Pos, 2, 10);

    var net = 0;

    while (net < 64) {
        await BrainPad.Display.DrawLine(1, 64, net, 64, net + 5);
        net = net + 10;
    }

    await BrainPad.Display.Show();
    await BrainPad.System.Wait(10);
}

What’s Next?

Can you give the game Artificial Intelligence and let one of the players be the BrainPad?

BrainStorm

Typically, Video Games require a lot of processing power. Any basic modern computer can surf the web and send emails but modern video games require very sophisticated computers, with special graphics cards. We find it silly that you need a basic computer to do work but then you need an advanced computer to play!