Multiplayer

Activity

Go to Activity: Multiplayer. Complete student tasks 2-5.

Tasks

Task 2

1. Create a function called newBall.
2. Set currentBall to a sprite with an image of a ball; assign it of kind Ball.
3. Give the ball a vx of either -75 or 75, with a 50 % chance of each (use an if then ... else block to handle this).
4. Give the ball a random vy between -75 and 75.
5. Create a newball when the game starts.
6. Comment your code.

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Task 3

1. Place an if then ... else if then block inside of on game update.
2. First, check if currentBall‘s y position is less than or equal to 0
   • If it is, set currentBall‘s y position to 0 set currentBall‘s vy to its current vy multiplied by -1
3. Next, check if currentBall‘s y position is greater than or equal to screen height.
4. If it is, set currentBall‘s y position to screen height set currentBall‘s vy to its current vy multiplied by -1
5. Comment your code.

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Task 4

1. Add another if then ... else then block inside on game update.
2. If the currentBall‘s x position is greater than screen width, then destroy the currentBall, increase player one’s score by 1, create a newBall.
3. Otherwise, if the currentBall‘s x position is less than 0, then destroy the currentBall, increase player two’s score by 1, create a newBall.
4. In on start, set players one and two’s score to start at 0.
5. Add comments to your code.

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Task 5

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1. Create an on overlap event between a Player and a Ball, so that sprite corresponds to the Player.
2. Reverse the Ball‘s vx by setting it to the current vx multiplied by -1.
3. Comment your code.

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Task 5 Challenge

1. When reversing the Ball‘s vx, multiply the current vx by -1.1 instead of -1 on each volley.
2. Add change otherSprite vy by 0 to change the vertical speed of the Ball when it collides with a paddle. Replace the 0 with sprite vy multiplied by 0.33.

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Extension

1. Use JavaScript or Python to create this project.
2. How might you improve game play? Modify your game accordingly.

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Reflection/Homework

How does having multiple players at once in a single game allow for new and compelling games?

Were there any difficulties in implementing the multiplayer game? Was it easier or harder than a single player game?

How might/did you debug your code?