added "-r dense" as argument for radius

-r dense will tell the plugin to calculate the radius of the sheep using
the forumla r = sqrt(sheep / pi), so that it party becomes a sheep
moshpit.
also renamed getSheep to getSheepList, and added getSheep to get the
sheep number

src/ca/gibstick/discosheep/BaaBaaBlockSheepEvents.java

@@ -32,7 +32,7 @@ public class BaaBaaBlockSheepEvents implements Listener {
 	public void onPlayerShear(PlayerShearEntityEvent e) {
 		if (e.getEntity() instanceof Sheep) {
 			for (DiscoParty party : parent.getParties()) {
-				if (party.getSheep().contains((Sheep) e.getEntity())) {
+				if (party.getSheepList().contains((Sheep) e.getEntity())) {
 					e.setCancelled(true);
 				}
 			}
@@ -44,7 +44,7 @@ public class BaaBaaBlockSheepEvents implements Listener {
 	public void onEntityDamageEvent(EntityDamageEvent e) {
 		if (e.getEntity() instanceof Sheep) {
 			for (DiscoParty party : parent.getParties()) {
-				if (party.getSheep().contains((Sheep) e.getEntity())) {
+				if (party.getSheepList().contains((Sheep) e.getEntity())) {
 					{
 						party.jumpSheep((Sheep) e.getEntity()); // for kicks
 						e.setCancelled(true);

src/ca/gibstick/discosheep/DiscoParty.java

@@ -26,7 +26,6 @@ public class DiscoParty {
 	private DiscoSheep ds;
 	private Player player;
 	private ArrayList<Sheep> sheepList = new ArrayList<Sheep>();
-	private int duration, period, radius, sheep;
 	static int defaultDuration = 300; // ticks for entire party
 	static int defaultPeriod = 10; // ticks per state change
 	static int defaultRadius = 5;
@@ -39,6 +38,7 @@ public class DiscoParty {
 	static int maxPeriod = 40;	// 2.0 seconds
 	private boolean doFireworks = false;
 	private boolean doJump = true;
+	private int duration, period, radius, sheep;
 	private int state = 0; // basically our own tick system
 	private DiscoUpdater updater;
 	private static final DyeColor[] discoColours = {
@@ -86,10 +86,14 @@ public class DiscoParty {
 		return newParty;
 	}
 
-	List<Sheep> getSheep() {
+	List<Sheep> getSheepList() {
 		return sheepList;
 	}
 
+	public int getSheep() {
+		return this.sheep;
+	}
+
 	public DiscoParty setPlayer(Player player) {
 		if (player != null) {
 			this.player = player;
@@ -126,6 +130,19 @@ public class DiscoParty {
 		}
 	}
 
+	public DiscoParty setDenseRadius(int sheepNo) throws IllegalArgumentException {
+		Integer r = (int) Math.floor(Math.sqrt(sheep / Math.PI));
+		if (r > DiscoParty.maxRadius) {
+			r = DiscoParty.maxRadius;
+		}
+		if (r < 1) {
+			r = 1;
+		}
+		
+		this.setRadius(r);
+		return this;
+	}
+
 	public DiscoParty setSheep(int sheep) throws IllegalArgumentException {
 		if (sheep <= DiscoParty.maxSheep && sheep > 0) {
 			this.sheep = sheep;
@@ -171,16 +188,16 @@ public class DiscoParty {
 		newSheep.setColor(discoColours[(int) (Math.random() * (discoColours.length - 1))]);
 		newSheep.setBreed(false); // this prevents breeding - no event listener required
 		newSheep.teleport(loc); // teleport is needed to set orientation
-		getSheep().add(newSheep);
+		getSheepList().add(newSheep);
 	}
 
 	// Mark all sheep in the sheep array for removal, then clear the array
 	void removeAllSheep() {
-		for (Sheep sheeple : getSheep()) {
+		for (Sheep sheeple : getSheepList()) {
 			//sheeple.setHealth(0); // removed to make it more resilient to updates
 			sheeple.remove();
 		}
-		getSheep().clear();
+		getSheepList().clear();
 	}
 
 	// Set a random colour for all sheep in array
@@ -254,7 +271,7 @@ public class DiscoParty {
 	}
 
 	void updateAllSheep() {
-		for (Sheep sheeple : getSheep()) {
+		for (Sheep sheeple : getSheepList()) {
 			randomizeSheepColour(sheeple);
 
 			if (doFireworks && state % 8 == 0) {

src/ca/gibstick/discosheep/DiscoSheepCommandExecutor.java

@@ -59,6 +59,8 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 
 		Player player = null;
 		boolean isPlayer = false;
+		boolean specialRadius = false;
+		// flag to determine if we calculate a radius so that the sheep spawn densely in an area
 
 		if (sender instanceof Player) {
 			player = (Player) sender;
@@ -92,6 +94,10 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 					return parent.noPermsMessage(sender, DiscoSheep.PERMISSION_FIREWORKS);
 				}
 			} else if (args[i].equalsIgnoreCase("-r")) {
+				if (parseNextArg(args, i, "dense")) {
+					specialRadius = true;
+				}
+				if (!specialRadius) {
 					try {
 						mainParty.setRadius(parseNextIntArg(args, i));
 					} catch (IllegalArgumentException e) {
@@ -99,6 +105,7 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 								+ DiscoParty.maxRadius + "]");
 						return false;
 					}
+				}
 			} else if (args[i].equalsIgnoreCase("-n")) {
 				try {
 					mainParty.setSheep(parseNextIntArg(args, i));
@@ -131,6 +138,10 @@ public class DiscoSheepCommandExecutor implements CommandExecutor {
 			}
 		}
 
+		if (specialRadius) {
+			mainParty.setDenseRadius(mainParty.getSheep());
+		}
+
 		if (args.length > 0) {
 			if (args[0].equalsIgnoreCase("all")) {
 				return parent.partyAllCommand(sender, mainParty, this);