cop 3503 fall 2012 shayan javed lecture 10

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COP 3503 FALL 2012SHAYAN JAVED

LECTURE 10

Programming Fundamentals using Java

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In-Class Exercise

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Extra Credit

2% extra credit

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Angry Birds

How many of you have played it?

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Angry Birds

Well-designed, simple game

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Angry Birds

Well-designed, simple game

Throw birds at pigs

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Angry Birds

Well-designed, simple game

Throw birds at pigs Physics!

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Angry Birds

Well-designed, simple game

Throw birds at pigs Physics!

Made millions

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Angry Birds

Well-designed, simple game

Throw birds at pigs Physics!

Made millions

Available on pretty much every platform

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Angry Birds

Well-designed, simple game

Throw birds at pigs Physics!

Made millions

Available on pretty much every platform Even Google Chrome!

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Angry Birds

Exercise:

Design the class structure for the game (UML diagram)

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Angry Birds

Exercise:

Design the class structure for the game (UML diagram)

Try to use everything we have learned so far: Classes/Inheritance/Abstract Classes Interfaces Interaction between classes

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Angry Birds

Quick look at some of the “objects” in the game: Different types of birds:

Red (Regular) Blue (explodes into 3 smaller ones) Yellow (accelerates mid-air) Black (explodes)

3 more but we can skip those...

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Angry Birds

Different types of pigs:

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Angry Birds

Different barriers

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Angry Birds

Possible solution:

Start off with a class which forms the basis of every object in the world

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Angry Birds

abstract class Sprite implements Cloneable {Point position;Image bitmapFile; // JPEG, PNG, etc...

double sizeX;double sizeY;

public Object clone() {} // clone method}

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Angry Birds

abstract class Bird extends Sprite implements Cloneable {double strength;public Object clone() {} // clone method

}

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Angry Birds

abstract class Bird extends Sprite implements Cloneable {double strength;public Object clone() {} // clone method

}

class RedBird extends Bird implements Cloneable { // inherits properties from superclasspublic Object clone() {} // clone method

}

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Angry Birds

abstract class Bird extends Sprite implements Cloneable {double strength;public Object clone() {} // clone method

}

class RedBird extends Bird implements Cloneable { // inherits properties from superclasspublic Object clone() {} // clone method

}

abstract class SpecialBird extends Bird implements Cloneable {abstract specialMove(); // {abstract method} executed on tap

}

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Angry Birds

class BlueBird extends SpecialBird implements Cloneable {specialMove() { }

}

class YellowBird extends SpecialBird implements Cloneable {specialMove() { }

}

class BlackBird extends SpecialBird implements Cloneable {specialMove() { }

}

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Angry Birds

abstract class Pig extends Sprite implements Cloneable {double health;public Object clone() {} // clone method

}

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Angry Birds

abstract class Pig extends Sprite implements Cloneable {double health;public Object clone() {} // clone method

}

class SmallPig extends Pig implements Cloneable { // inherits properties from superclass

}

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Angry Birds

abstract class Pig extends Sprite implements Cloneable {double health;public Object clone() {} // clone method

}

class SmallPig extends Pig implements Cloneable { // inherits properties from superclass

}

class MediumPig, BigPig, HelmetPig, KingPig, etc.

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Angry Birds

abstract class Pig extends Sprite implements Cloneable {double health;public Object clone() {} // clone method

}

class SmallPig extends Pig implements Cloneable { // inherits properties from superclass

}

class MediumPig, BigPig, HelmetPig, KingPig, etc.

// each have their own images, sizes, etc.

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Angry Birds

abstract class Barrier extends Sprite implements Cloneable {double strength, density, etc..;public Object clone() {} // clone method

}

class IceBarrier, WoodBarrier, StoneBarrier, etc.

// each have their own images, sizes, etc.

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AngryBirds

One last class...

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AngryBirds

One last class...

class Level implements ? {// what properties?

}

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AngryBirds

One last class...

class Level implements Cloneable {// what properties?

public Object clone() {…} }

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AngryBirds

One last class...

class Level implements Cloneable {ArrayList<Bird> birds;ArrayList<Pig> pigs;ArrayList<Barrier> barriers;

public Object clone() {…} }