Book Image

Monkey Game Development: Beginner's Guide

By : Michael Hartlef
Book Image

Monkey Game Development: Beginner's Guide

By: Michael Hartlef

Overview of this book

Monkey is a programming language and toolset that allows its user to develop modern 2D games easily for mobile and other platforms like iOS, Android, HTML5, FLASH, OSX, Windows and XNA. With Monkey you can create best selling games in a matter of weeks, instead of months.Monkey Game Development Beginner's Guide provides easy-to-follow step by step instructions on how to create eight different 2D games and how to deploy them to various platforms and markets. Learning about the structure of Monkey and how everything works together you will quickly create eight classical games and publish them to the modern app markets. Throughout the book you will learn important game development techniques like collision detection, handling player input with mouse, keyboard or touch events and creating challenging computer AI. The author explains how to emit particle effects, play sound and music files, use sprite sheets, load or save high-score tables and handle different device resolutions. Finally you will learn how to monetize your games so you can generate revenue.
Table of Contents (16 chapters)
Monkey Game Development
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
3
Game #2, Rocket Commander
4
Game #3, CometCrusher
5
Game #4, Chain Reaction
6
Game #5, Balls Out!
8
Game #7, Air Dogs 1942
9
Game #8, Treasure Chest

Time for action — spawning an enemy plane


Besides using a different image, which is placed and rotated differently, spawning the enemy plane works in a similar way to spawning the player plane.

  1. 1. Add a new method called SpawnEnemy to the game class.

    Method SpawnEnemy:Int ()
    
  2. 2. Assign the image of the plane to the corresponding enemy field.

    enemy = eng.CreateImage(atlas,64,0,64,64,cw/4*3,ch/2)
    
  3. 3. Scale it down to a factor of 0.7.

    enemy.SetScale(0.7)
    
  4. 4. Set its angle to 180 degrees and give it a speed of 8.

    enemy.SetAngle(180)
    enemy.SetSpeed(8)
    
  5. 5. Let the enemy plane wrap around the screen edges.

    enemy.SetWrapScreen(True)
    
  6. 6. For collision detection, set the collision group to grpEnemy and give it a radius of 24.

    enemy.SetColGroup(grpEnemy)
    enemy.SetRadius(24)
    
  7. 7. Reset its hit points to 0 and close the method.

    hitsC=0
    canShoot=True
    Return 0
    End
    

What just happened?

Now, you have added a method to spawn an enemy plane that will appear on the right side of the canvas, facing downwards. Call it with...