book

Scratch Programming Playground

Name: Scratch Programming Playground
Author: Al Sweigart
ISBN: 9781593277628

by Al Sweigart

September 2016

Beginner

288 pages

6h 14m

English

No Starch Press

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Cover Page
Title Page
Copyright Page
Dedication
About the Author
About the Technical Reviewer
Brief Contents
Contents in Detail
Acknowledgments
Chapter 0: Introduction
Who This Book Is ForAbout This BookHow to Use This BookOnline ResourcesErrata and Updates

Chapter 1: Getting Started with Scratch
Running ScratchThe Offline EditorThe Scratch Editor and SpritesThe Paint EditorWorking with Code BlocksAdding BlocksDeleting BlocksRunning ProgramsShowing Off Your ProgramsGetting HelpThe Tips WindowThe See Inside ButtonSummary
Chapter 2: Rainbow Lines in Space!
Sketch Out the DesignA. Create the Space Backdrop1. Clean Up and Set the StageB. Create Three Bouncing Dots2. Paint the Dot3. Add Code for the Dot 1 SpriteExplore: Directions and Degrees4. Duplicate the Dot 1 SpriteC. Draw the Rainbow Lines5. Add the Code for the Drawing Dot SpriteThe Complete ProgramTurbo ModeVersion 2.0: Rainbow TrianglesVersion 3.0: Two Rainbow LinesVersion 4.0: You Decide!SummaryReview Questions
Chapter 3: Maze Runner
Sketch Out the DesignA. Make the Cat Walk AroundExplore: X- and Y-Coordinates1. Add Movement Code to the Player Sprite2. Duplicate the Movement Code for the Cat SpriteB. Make the Maze Levels3. Download the Maze Images4. Change the Backdrop5. Start at the First MazeC. Keep the Cat from Walking Through Walls6. Check Whether the Cat Is Touching the WallsD. Make a Goal at the End of the Maze7. Create the Apple Sprite8. Detect When the Player Reaches the Apple9. Add the Broadcast Handling Code to the Maze SpriteThe Complete ProgramVersion 2.0: Two-Player ModeDuplicate the Apple SpriteModify the Apple2 Sprite’s CodeDuplicate the Orange Cat SpriteModify the Code for the Blue Cat SpriteGo Back to the Starting PositionVersion 3.0: TrapsDraw a New Sprite for the TrapsCreate a Second Costume for the TrapsAdd Cloning Code for the TrapsModify the Orange Cat CodeCopy the Code from Orange Cat to Blue CatCheat Mode: Walk Through WallsAdd the Walk-Through-Walls Code to Orange CatAdd the Walk-Through-Walls Code to Blue CatSummaryReview Questions
Chapter 4: Shooting Hoops with Gravity
Sketch Out the DesignA. Make the Cat Jump and Fall1. Add the Gravity Code to the Cat SpriteExplore: For All Sprites vs. For This Sprite Only2. Add the Ground Level Code3. Add the Jumping Code to the Cat SpriteB. Make the Cat Move Left and Right4. Add the Walking Code to the Cat SpriteC. Make a Hovering Basketball Hoop5. Create the Hoop Sprite6. Create the Hitbox SpriteD. Make the Cat Shoot Hoops7. Create the Basketball Sprite8. Add the Code for the Basketball Sprite9. Detect Whether a Basket Is Made10. Fix the Scoring BugThe Complete ProgramVersion 2.0: Two-Player ModeDuplicate the Cat and Basketball SpritesModify the Code for the Cat2 SpriteModify the Code for the Basketball2 SpriteCheat Mode: Freeze the HoopSummaryReview Questions
Chapter 5: A Polished Brick Breaker Game
Sketch Out the DesignA. Make a Paddle That Moves Left and Right1. Create the Paddle SpriteExplore: Rotation StylesB. Make a Ball That Bounces Off the Walls2. Create the Tennis Ball SpriteC. Make the Ball Bounce Off the Paddle3. Add the Bounce Code to the Tennis Ball SpriteExplore: CloningD. Make Clones of the Brick4. Add the Brick Sprite5. Clone the Brick SpriteE. Make the Ball Bounce Off Bricks6. Add the Bounce Code to the Brick SpriteF. Make “You Win” and “Game Over” Messages7. Modify the Tennis Ball Sprite’s Code8. Create the Game Over Sprite9. Create the You Win SpriteThe Complete ProgramVersion 2.0: Polishing TimeDraw a Cool BackdropAdd MusicMake the Paddle Flash When HitAdd an Animated Entrance and Exit to the BricksAdd a Sound Effect to the Brick ExitAdd a Sound Effect to the Tennis BallAdd a Trail Behind the Tennis BallAdd an Animated Entrance for the Game Over SpriteAdd an Animated Entrance for the You Win SpriteSummaryReview Questions
Chapter 6: Snaaaaaake!
Sketch Out the DesignA. Make a Snake Head That Moves Around1. Create the Head SpriteExplore: when key pressed vs. if key pressed? thenB. Make Apples Appear2. Add the Apple SpriteC. Make a Body That Appears Behind the Snake Head3. Create the Body Sprite4. Create the Body Sprite’s Second Costume5. Add the Code for the Body Sprite6. Detect Whether the Snake Crashes into Itself or a WallThe Complete ProgramVersion 2.0: Add Bonus FruitCheat Mode: InvincibilityModify the HeadModify the Body CodeCheat Mode: Chop Off Your Tail!SummaryReview Questions
Chapter 7: Fruit Slicer
Sketch Out the DesignA. Make the Start Screen Backdrop1. Draw the Backdrops2. Add the Code for the StageB. Make the Slice Trail3. Draw the Slice SpriteExplore: Making Lists4. Create Lists and Variables for the Slice Sprite5. Record the Mouse Movements6. Make a Custom Block to Draw the SliceC. Make the Begin Button7. Create the Begin Button SpriteD. Make the Fruit and Bombs Throw Themselves8. Create the Fruit Sprite9. Make the Sliced Fruit Costumes10. Add the Code to the Fruit Sprite11. Add the Code for the Fruit Sprite’s ClonesE. Make the Health Sprites12. Create the Health SpriteF. Make the Game’s Ending13. Create the White Fade Out SpriteVersion 2.0: High ScoreCheat Mode: Recover HealthSummaryReview Questions
Chapter 8: Asteroid Breaker . . . in Space!
Sketch Out the DesignA. Make a Spaceship That Is Pushed Around1. Create the Spaceship SpriteB. Make the Spaceship Wrap Around the Edges2. Add the Wrap-Around Code to the Spaceship Sprite3. Add the Random-Push Code to the Spaceship SpriteC. Aim with the Mouse and Fire with the Spacebar4. Create the Energy Blast SpriteD. Make Asteroids That Float Around5. Create the Asteroid SpriteE. Make Asteroids Split in Two When Hit6. Add the Asteroid’s Splitting Code7. Add the Asteroid Blasted Message Code to the Energy Blast SpriteF. Keep Score and Make a Timer8. Create the Out of Time SpriteG. Make the Spaceship Explode If It Is Hit9. Upload the Explosion Sprite10. Add the Code for the Explosion Sprite11. Add the Explode Code to the Spaceship SpriteVersion 2.0: Limited AmmoCheat Mode: Starburst BombSummaryReview Questions
Chapter 9: Making an Advanced Platformer
Sketch Out the DesignA. Create Gravity, Falling, and Landing1. Create the Ground Sprite2. Add the Gravity and Landing Code3. Make the Cat Walk and Wrap Around the Stage4. Remove the Ground Lift DelayB. Handle Steep Slopes and Walls5. Add the Steep Slope CodeC. Make the Cat Jump High and Low6. Add the Jumping CodeD. Add Ceiling Detection7. Add a Low Platform to the Ground Sprite8. Add the Ceiling Detection CodeE. Use a Hitbox for the Cat Sprite9. Add a Hitbox Costume to the Cat Sprite10. Add the Hitbox CodeF. Add a Better Walking Animation11. Add the New Costumes to the Cat Sprite12. Create the Set Correct Costume BlockG. Create the Level13. Download and Add the Stage Backdrop14. Create a Hitbox Costume for the Ground Sprite15. Add the Ground Sprite’s Code16. Add More Wrap-Around Code to the Cat SpriteH. Add Crab Enemies and Apples17. Add the Apple Sprite and Code18. Create the Crab Sprite19. Create the Enemy Artificial Intelligence20. Add the Time’s Up SpriteSummaryReview Questions
Where to go From Here
Index
Resources
Don’t Just Play Games—Make Them!

Content preview from Scratch Programming Playground

INDEX

SYMBOLS

+ (addition) block, 169, 236–237

/ (division) block, 134, 169

= (equal to) block, 86, 220

> (greater than) block, 73–74, 205

< (less than) block, 73–74, 84, 105, 112, 205, 223

* (multiplication) block, 134, 169, 229

- (subtraction) block, 100

A

account, Scratch website, 3–4, 11

addition (+) block, 169, 236–237

AI (artificial intelligence), 246

all around rotation style, 97

and block, 84, 192

animating sprites, 16, 112–115, 119–121, 231–232

arrow keys, 40–42, 53, 74, 76, 129

artificial intelligence (AI), 246

Asteroid Breaker program

aiming and firing, 190–193

designing, 184–185

exploding animation, 200–203

keeping score, 199–200

limiting ammo, 204–205

making asteroids, 194–195

making spaceship, 186–187

splitting hit asteroids,

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Publisher Resources

ISBN: 9781492017523Errata Page

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Scratch Programming Playground

by Al Sweigart