Exercise 04

import imagePackage.RasterImage;

import java.awt.BasicStroke; import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics2D; import java.awt.Toolkit; import java.awt.geom.*; import java.awt.geom.Point2D; import java.awt.geom.Rectangle2D; import java.io.PrintStream;

// ALIEN is a COMPOSITION of a Point2D // ALIEN is an AGGREGATION of a Color

public class Alien { // functionality to draw an Alien, given a position and Graphics2D object // The expected class variables are given below private Point2D.Double pos; private Color col; private double width; private double height; private Alien() { // Restrict public use of default constructor (keep this empty, only use custom ctor's) } // custom constructors public Alien(Point2D.Double pos) { } public Alien(Point2D.Double pos, double width, double height, Color col) { } // copy constructor public Alien(Alien other) { } // mutators public void setColor(Color col) { } public void setPos(Point2D.Double pos) { } // draw method public void draw(Graphics2D gfx) { // method to draw an Alien object } @Override public String toString() { String result = "Alien: pos= " + this.pos + ", size= " + this.width + ", " + this.height; return result; }

public static void main(String[] args) { /* * Sample main method to instantiate 3 Alien objects (as per the diagram in lab3 pdf) * * The main then draws each of these in a new position, the look and feel of the Alien * object (its shape) will depend on how you define your draw method * */ PrintStream out = System.out; Dimension screen = Toolkit.getDefaultToolkit().getScreenSize(); RasterImage gameBoard = new RasterImage(640,480); gameBoard.show(); Graphics2D g = gameBoard.getGraphics2D(); Alien a1 = new Alien(new Point2D.Double(100, 100)); Alien a2 = new Alien(new Point2D.Double(200, 100),100,150,Color.RED); Alien a3 = new Alien(a1); a3.setColor(Color.ORANGE); a3.setPos(new Point2D.Double(100, 300)); a1.draw(g); a2.draw(g); a3.draw(g); } }

Exercises 04 (Alien class: Alien.ja en.java In this task, using a similar methodology to that used in Exercises 01-03, create an Alien class that represents one of the attacking aliens An Alien object should be initialized by default with a BLACK color object, and have its position defined as a Point2D.Double object (rather than using x,y as in the Hero classes) Point2D. Double can be found in java.awt.geom.Point2D). The Alien must have at least * one custom constructor (notice that the default constructor is private, so only custom constructor(s) may be used to instantiate) the ability to be instantiated with an alternative color to black one "draw" method (as with the Hero classes). The draw method will display a unique shape for the Alien object (up to you to define), but the shape should be based on the position, height and width of the Alien object. * * The Alien class should be a COMPOSITION of Point2D a object, and an AGGREGATION of a Color object (see diagram below). An Alien is only coloured a single colour See the video link at the top of this lab document for some inspiration on Alien shapes keep it simple.. or create an Alien similar to the example image on the next page) Create a full UML class diagram of your Alien class (showing class variables, constructors and methods) and submit this file (as per submission at the end of this document) Point2D.Double Alien Color Alien // class variables // must have a Point2D.Double object for position // constructors l/ relevant accessor/mutator methods // must have draw method // (this defines the look and shape of your Alien) Example of a simple Alien (instantiated 3 times & drawn using shell code in Alien.java) New Picture