Creating a Ping Pong Game in mBlock
Creating a Ping Pong Game in
mBlock is a fun and interactive way for students to learn programming concepts
like loops, conditionals, and events. Here's a step-by-step guide:
Objective
Students will create a basic
ping-pong game where:
1.
A ball moves across the screen.
2.
Players control a paddle to bounce
the ball.
3.
The game ends if the ball misses the
paddle.
Step-by-Step Instructions
1. Setup the Stage
- Open mBlock and switch to the Sprite Tab.
- Choose or draw a simple backdrop (e.g., a solid
background or a sports theme).
2. Add Sprites
- Ball:
- Click "Choose a Sprite" and select or draw a
ball.
- Paddle:
- Add a new sprite, like a rectangle, to represent the
paddle.
3. Code for the Ball
1.
Initialize
the Ball:
o Add the following script to the Ball:
plaintext
Copy
code
When
Green Flag clicked
Go
to (0, 0)
Point
in direction (45)
Forever
Move (10) steps
If on edge, bounce
2.
Bounce off
the Paddle:
o Add the following:
plaintext
Copy
code
If
touching (Paddle)
Point in direction (Pick random -60 to
-120)
3.
Game Over
Condition:
o Add:
plaintext
Copy
code
If
(Y position < -150)
Stop all
4. Code for the Paddle
1.
Control the
Paddle with Arrow Keys:
o Add the following script to the Paddle:
plaintext
Copy
code
When
Green Flag clicked
Forever
If (Key "Right arrow" pressed)
Change X by (15)
If (Key "Left arrow" pressed)
Change X by (-15)
2.
Restrict
Paddle Movement:
o Add:
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Copy
code
If
(X position > 200)
Set X to (200)
If
(X position < -200)
Set X to (-200)
5. Add a Score Counter
1.
Create a
Variable:
o Go to the "Variables" tab and create a variable
called Score.
2.
Increase
Score:
o Add this to the Ball's script:
plaintext
Copy
code
If
touching (Paddle)
Change (Score) by (1)
3.
Reset Score:
o Add to the Green Flag script:
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Copy
code
Set
(Score) to (0)
6. Test the Game
1.
Click the Green Flag to
start.
2.
Use the arrow keys to move the
paddle.
3.
Observe how the ball bounces and the
score increases when it hits the paddle.
Enhancements
- Add sounds when the ball hits the paddle.
- Introduce levels by increasing the ball's speed
after a certain score.
- Create a restart button to play again.
Learning Outcomes
- Ball Movement:
Understanding motion and direction.
- Conditionals:
Checking for collisions and game boundaries.
- Loops:
Repeating actions for continuous gameplay.
- Variables:
Keeping track of scores.
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