Asteroid rendered

Comments added
Worksheet 01 added (not completed)

src/spaceshooter01/SpaceShooter01.java

 package spaceshooter01;
 
 import processing.core.PApplet;
+import processing.core.PImage;
 
 
 public class SpaceShooter01 extends PApplet {
 
+	enemyObject asteroid;  // object used to define an asteroid
+	
+	// settings() method is run when the application starts
+	// It is used to set the application settings
 	public void settings() {
-		size(500, 500);
+		size(500, 500);  // Sets the size of the window
 	}
 	
+	
+	// setup() method is called once, after the settings() method
+	// setup() is used to create objects and carry out any preparations for running the application
 	public void setup()
 	{	
-		int i=0;
+		asteroid = new enemyObject(this); // Creates a new object of the enemyObject type called asteroid		
 	}
 	
+	
+	// The draw() method is run and as soon as it completes it is run again.
+	// This continues until the application ends
+	// The method is poorly named because it does more than simply draw to the screen
+	// It needs to carry out three main functions
+	// 1 - Process input from the mouse and keyboard
+	// 2 - Update all the objects in the application
+	// 3 - Render (draw) to the screen
+	// I've added methods for each of these functions and changed the draw() method
+	// to call these three new methods in order. 
+	// You *shouldn't* need to ever change the draw() method
+	
+	
+	// Method to handle keyboard and mouse input
 	public void handleInput()
 	{
 		
 	}
 	
+	// update() handles updating all the objects in the application
+	// More accurately it tells all the objects in the application to update themselves,
+	// passing on any information they need to do that
 	public void update()
 	{
-		
+		asteroid.update(); // calls the asteroid's update() method
 	}
 	
+	// render() handles the drawing of objects to the screen
+	// again it mostly does this by telling all the objects to draw themselves
 	public void render()
 	{
-		background(64);
-		ellipse(mouseX, mouseY, 20, 20);
+		background(0); // sets the windows background to black
 		
-	}
+		asteroid.render(); // calls the asteroid's render() method to draw it
 		
 		
+	}
+	
 	
+	// draw() method described above. Called constantly byh processing
+	// You shouldn't need to change this
 	public void draw(){
 		handleInput();
 		update();
 		render();
 	}
   
+	// main() method is the starting point of any Java application
+	// In this case it starts the processing applet
+	// this calls settings() followed by setup(), then begins repeatedly calling draw.
 	public static void main(String[] passedArgs) {
 		String[] appletArgs = new String[] { "spaceshooter01.SpaceShooter01" };
 		PApplet.main(appletArgs);

src/spaceshooter01/enemyObject.java

 package spaceshooter01;
 
+import processing.core.PApplet;
+import processing.core.PImage;
+
 public class enemyObject {
 	
-	public enemyObject()
-	{
+	PApplet papplet;	// Handle for processing methods
+	PImage sprite;		// object to hold an image
 	
+	// Constructor method for enemyObject
+	public enemyObject(PApplet papp)
+	{
+		papplet = papp;	// required to use processing methods here
+		sprite = papp.loadImage("asteroid.png"); // loads the image from the data folder
+		sprite.resize(64, 0); // resizes the image to (x,y) dimensions. Note that if either x or y is 
+							  // zero then the image will be resized and maintain aspect ratio		
 	}
 	
+	// Method to handle keyboard and mouse input
+	// Not used yet!
 	public void handleInput()
 	{
 		
 	}
 	
+	// Method to handle updates to the enemyObject
 	public void update()
 	{
 		
 	}
 	
+	// Method to draw the enemyObject
 	public void render()
 	{
-		
+		papplet.image(sprite,100,100);	// Draws image at position 100,100
 	}