Homework #6

Implementing DomeWorld,  a Game Like the CannonWorld

Due: Wednesday, November 4th, at 11 AM

Introduction

It's been an up and down year for the Panther football team.  Maybe we can encourage them to win a few more games if we program a game that pays tribute to the football team and might just give us a little extra school spirit.  Let's make a new program that works just like CannonWorld, but with the spirit of Saturday afternoons in the UNI-Dome!

This assignment asks you to reuse ideas we have used in the past and gives you a chance to have as much fun as you like playing with Java graphics.

For your starting point, you should probably use the base CannonWorld game.

Tasks

1. Create a Football class. A Football is a member of the Ball family.  It moves through the air, subject to gravity, of course. It paints itself as a tan/brownish ball and is something more football shaped, maybe even with seams showing!

   So far we have set the color of an object by using the pre-defined colors in the Color class.  However, Color has a constructor that takes three ints as parameters (presumed to be from 0-255 inclusive) representing the intensity of Red, Green, and Blue (if this doesn't make any sense to you, read up on the computer representation of color by doing a web search for "RGB values of a color")

    

2. Implement a DomeWorld class that works just like a CannonWorld. In a DomeWorld, the player "shoots" a FootBall.

   Here are some of the other special features of a DomeWorld:

    

   • The "shooter" isn't a cannon but a person. It should look more like a person than a cannon.

      

   • The target looks like a football goalpost, not a pad.

      

   • The FootBall leaves from where the player's feet are.

      

   • The FootBall has "hit" the target if it passes over the goalpost's lower bar.  Hitting a field goal is VERY different from hitting the target in the original game.  You will need to take some to work through this process.

      

   • When the FootBall "hits" the target, the player is awarded three (3) points and the new score is displayed in a String or JLabel that is written at the top of the window, below the "Kick" button.

      

   • In addition to adjusting the angle of the kick, the user of the game can ...
     • ... change the height of the bottom bar of the goalpost by adjusting a slider (left-side of the screen).
     • ... move the kicker closer or farther from the goal posts by adjusting a slider (bottom of the screen)

     The placement of these sliders may seem a little odd, but please follow these specs.  You may need to adjust your graphics so that they are still visible with the addition of these new components.

   You should use the code of the CannonWorld class as the basis for your work. You might even copy CannonWorld.java to a file named DomeWorld.java and use it as a template. (Be sure to change the class and constructor names if you do!) 

On the Graphics Requirements

We are not asking for world-class graphics here; the simplest line art will earn you the credit. But we don't want the FootBall to look as if it leaves from the kicker's knees or as if the field goal was successful if it lands on the turf under goal posts.

On the other hand, if you get the functionality of this program going soon enough, you can probably have a lot of fun experimenting with the pictures that your game produces (or sounds)!  If our kicker looks like Billy Hallgren and the ball carries a UNI logo, all the better. :-)  Code that shows significant effort and creativity may be rewarded with bonus point(s).

If you want to explore with graphics files, consider the following short code example to get you started.

On Duplication

Ordinarily, I  encourage you not to duplicate code across classes. For this assignment, I will explicitly tell you that it is okay to use copy-and-paste to create DomeWorld from CannonWorld.  This may seem inconsistent... but later, we will use your DomeWorld solutions to learn a really neat set of object-oriented programming ideas -- ideas that will help you to build your own application frameworks!

Deliverables

By the due date and time, submit the files:

• FootBall.java
• DomeWorld.java
• any other files you might need to submit due to your creativity.  These should NOT include any of the Ball Family, however.

Because it is possible for you to submit a variety of sound and/or image files with this assignment - and doing so can confuse my submission system - I will ask that you simply zip these files into a single zip file called

• hw6.zip