1 of 13

Pong

The original Classic Arcade Game.

2 of 13

There is no cool way to

chase after a bouncing ping-pong ball.

3 of 13

Start a new project. Name your game.

Delete the cat sprite.

Use this sprite: here

Duplicate the sprite, twice. (pongSprite)

After you open the link, click this icon (top-right) to download.

In Scratch, you will need to Choose a Sprite and then upload this file

(the blue cat icon on the bottom right)

4 of 13

Name one sprite → ball

Name the other sprite → paddleOne

Name the third sprite → paddleTwo

NOTE:

​

Sprite names, Costume names, and variable names, should all start with a lowercase letter.

​

If a name has more than one word, then the first letter of each subsequent word is capitalised.

​

This is called camelCase, and it is an Industry accepted standard for naming conventions.

5 of 13

Check

Do you have 3 sprites. Are the named: ball, paddleOne, paddleTwo?

6 of 13

[code]

paddleOne

Note: you do NOT need to type in the “comments” (yellow textbox), these are provided as way of explanation as to the how & why of the code.

7 of 13

[code]

paddleTwo

These differ from paddleOne

Note:

“Comments” for this code can be seen on the previous sprite.

8 of 13

There are two slides for the ball code

You will need to append and/or alter the code as per the directions. (grey text)

The first slide offers the format of the control blocks within the code.

9 of 13

[code]

ball

Randomises the balls starting direction

There are FOUR If-Then conditions within this sprite, they control:

​

The maximum speed of the ball.

​

The ball bouncing off either paddle.

​

PlayerTwo scoring a point.

​

PlayerOne scoring a point.

​

The code for each of these is on the next slide, you will need to append this code accordingly.

​

Be careful and check that each block is NOT inside another.

10 of 13

[code]

ball

This code limits the ballSpeed

This code goes under the IF-THEN (touching paddle), but inside the FOREVER

HINT: If you get stuck, see code working HERE

11 of 13

Can I?

append & alter the ball code to offer a more “real” game experience

12 of 13

A good idea

Save as a Copy, add a “v2” to the name, before continuing

?

13 of 13

[code]

ball

Replace this code with BOTH the options below

You will need to create the

variable: paddleOffsetY (for all sprites)