From d32662fe2f461a38cc0e99951dfe9f82316a936c Mon Sep 17 00:00:00 2001
From: Adam Martindale <awiamartindale@googlemail.com>
Date: Fri, 2 Sep 2011 14:14:09 +0100
Subject: Renamed CirclePulsate class and added Draw Ellipse

---
 PunchingBag/src/PunchingBag.java | 67 +++++++++++++++++++++++++++-------------
 1 file changed, 46 insertions(+), 21 deletions(-)

diff --git a/PunchingBag/src/PunchingBag.java b/PunchingBag/src/PunchingBag.java
index 2efe903..7e04d33 100644
--- a/PunchingBag/src/PunchingBag.java
+++ b/PunchingBag/src/PunchingBag.java
@@ -2,7 +2,7 @@ import javax.swing.event.EventListenerList;
 import java.util.Arrays;
 
 public class PunchingBag implements Runnable {
-	private byte[] rawLeds = new byte[6*8];
+	private byte[] rawLeds = new byte[6 * 8];
 	private Colour[][] leds = new Colour[9][20];
 	private byte[] ledGridIntensities = new byte[6];
 	private boolean[][] buttons = new boolean[8][19];
@@ -27,22 +27,25 @@ public class PunchingBag implements Runnable {
 	public void addButtonListener(ButtonListener l) {
 		buttonListenerList.add(ButtonListener.class, l);
 	}
-	
-	public void setLED(byte x, byte y, Colour colour) {
-		leds[x][y] = colour;
+
+	public void setLED(int i, int j, Colour colour) {
+		leds[i][j] = colour;
 	}
 
-	public void drawRipple(byte x, byte y, byte intensity) {
-		new Ripple(x, y, intensity);
+	void CircleExpand(int x, int y, int delay, Colour colour) {
+		for (int i = 0; i <= 15; i++) {
+			DrawEllipse(x, y, i, i, colour);
+
+		}
 	}
 
-	class Ripple implements Runnable {
+	class CircleExpand implements Runnable {
 		double currentWidth;
 		final byte x;
 		final byte y;
 		byte intensity;
 
-		public Ripple(byte x, byte y, byte intensity) {
+		public CircleExpand(byte x, byte y, byte intensity) {
 			this.x = x;
 			this.y = y;
 			this.intensity = intensity;
@@ -67,8 +70,8 @@ public class PunchingBag implements Runnable {
 				drawnSomething = false;
 
 				for (double i = 0; i < 360; i++) {
-					//int x = x + (int) Math.round(currentWidth * Math.cos(i));
-					//int y = y + (int) Math.round(currentWidth * Math.sin(i));
+					// int x = x + (int) Math.round(currentWidth * Math.cos(i));
+					// int y = y + (int) Math.round(currentWidth * Math.sin(i));
 
 					if (x >= 0 && x <= 8 && y >= 0 && y <= 19) {
 						setLED(x, y, colour);
@@ -79,7 +82,7 @@ public class PunchingBag implements Runnable {
 
 				currentWidth += 0.1 + (currentWidth / 10);
 				try {
-					Thread.sleep(1000/60);
+					Thread.sleep(1000 / 60);
 				} catch (InterruptedException e) {
 					e.printStackTrace();
 				}
@@ -88,17 +91,38 @@ public class PunchingBag implements Runnable {
 
 	}
 
+	public void DrawEllipse(int x, int y, int radx, int rady, Colour colour) {
+		if (radx == 0 && rady == 0) {
+			setLED(x, y, colour);
+			return;
+		}
 
+		int dx = 0, dy = rady; /* first quadrant from top left to bottom right */
+		int a2 = radx * radx, b2 = rady * rady;
+		int err = b2 - (2 * rady - 1) * a2, e2; /* error value in the first step */
 
-void CirclePulsate (int x, int y)
-{
-for ( int i= 0 ; i<= 15 ; i++ ) {
-/*matrix. Clear ( ) ;
-matrix. DrawEllipse ( AS1107:: Maxx / x , y ,i,i ) ;
-matrix. Update ( ) ;
-delay ( d ) ;*/
-}
-}
+		do {
+			setLED(x + dx, y + dy, colour); /* I. Quadrant */
+			setLED(x - dx, y + dy, colour); /* II. Quadrant */
+			setLED(x - dx, y - dy, colour); /* III. Quadrant */
+			setLED(x + dx, y - dy, colour); /* IV. Quadrant */
+
+			e2 = 2 * err;
+			if (e2 < (2 * dx + 1) * b2) {
+				dx++;
+				err += (2 * dx + 1) * b2;
+			}
+			if (e2 > -(2 * dy - 1) * a2) {
+				dy--;
+				err -= (2 * dy - 1) * a2;
+			}
+		} while (dy >= 0);
+
+		while (dx++ < radx) { /* correction for flat ellipses (b=1) */
+			setLED(x + dx, y, colour);
+			setLED(x - dx, y, colour);
+		}
+	}
 
 	public void addLEDChangeListener(ButtonListener l) {
 		ledListenerList.add(ButtonListener.class, l);
@@ -125,7 +149,8 @@ delay ( d ) ;*/
 		// TODO: Complete and test, or rethink the following?
 		for (int startY = 0; startY <= 4; startY++) {
 			for (int y = 0; y <= 3; y++) {
-				if (leds[x][startY + (y * 4)] == Colour.Red || leds[x][startY + (y * 4)] == Colour.Yellow) {
+				if (leds[x][startY + (y * 4)] == Colour.Red
+						|| leds[x][startY + (y * 4)] == Colour.Yellow) {
 					rawLeds[(5 * 8) + startY] = (byte) (rawLeds[(int) Math
 							.floor(y / 4)] | (1 << (7 - x)));
 				}
-- 
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