Polymorphism Revisited: Asteroids Game Extension

Introduction

Your goal today is to modify the Asteroids sample solution by adding a new game element and demonstrating it to the instructor.

This is an opportunity for you to be creative, but don't be too ambitious. The goal is to complete your modifications before the end of the lab period.

Requirements

Your new element must move around the screen and interact with the other objects in the game (i.e. collide). It should be visually distinguishable from the other game elements. It should work by having an update() and a draw() like the other animated objects, but otherwise you can decide what exactly it will do.

Possible ideas:

• Evil Asteroid The evil asteroid accelerates toward whatever ship is on the screen when it is created.
• Tough Asteroid The tough asteroid needs to be shot multiple times before it is destroyed. It shrinks each time it takes a hit.
• Bomb If the bomb isn't shot quickly enough it will destroy all ships and bullets on the screen.

The only existing class you should modify is AsteroidsGame.java, and the only change to that class should be code to insert your new element into the game.

Submitting

You should make sure that your code compiles and runs with the game even if the element doesn't work exactly as you had planned. Submit AsteroidsGame.java and your new class through Web-CAT.