Add getClosest(Living)Entity methods (#1002)

## Additions
* Adds GeneralMethods#getClosestEntity(Location, double)
* Adds GeneralMethods#getClosestLivingEntity(Location, double)

## Misc. Changes
* Changes GeneralMethods#isUndead(Entity) to use `default`, removes warnings
* Changes GeneralMethods#isWeapon(Material) to use `default`, removes warnings

src/com/projectkorra/projectkorra/GeneralMethods.java

@@ -862,6 +862,50 @@ public class GeneralMethods {
 		}
 		return circleblocks;
 	}
+	
+	/**
+	 * Gets the closest entity within the specified radius around a point
+	 * @param center point to check around
+	 * @param radius distance from center to check within
+	 * @return null if not found
+	 */
+	public static Entity getClosestEntity(Location center, double radius) {
+		Entity found = null;
+		double distance = radius * radius;
+		
+		for (Entity entity : GeneralMethods.getEntitiesAroundPoint(center, radius)) {
+			double check = center.distance(entity.getLocation());
+			
+			if (check < distance) {
+				found = entity;
+				distance = check;
+			}
+		}
+		
+		return found;
+	}
+	
+	/**
+	 * Gets the closest LivingEntity within the specified radius around a point
+	 * @param center point to check around
+	 * @param radius distance from center to check within
+	 * @return null if not found
+	 */
+	public static LivingEntity getClosestLivingEntity(Location center, double radius) {
+		LivingEntity le = null;
+		double distance = radius * radius;
+		
+		for (Entity entity : GeneralMethods.getEntitiesAroundPoint(center, radius)) {
+			double check = center.distance(entity.getLocation());
+			
+			if (entity instanceof LivingEntity && check < distance) {
+				le = (LivingEntity) entity;
+				distance = check;
+			}
+		}
+		
+		return le;
+	}
 
 	public static String getCurrentDate() {
 		final DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
@@ -1589,6 +1633,7 @@ public class GeneralMethods {
 		if (entity == null) {
 			return false;
 		}
+		
 		switch (entity.getType()) {
 			case SKELETON:
 			case STRAY:
@@ -1603,8 +1648,9 @@ public class GeneralMethods {
 			case SKELETON_HORSE:
 			case PHANTOM:
 				return true;
+			default:
+				return false;
 		}
-		return false;
 	}
 
 	public static boolean isWeapon(final Material mat) {
@@ -2283,7 +2329,8 @@ public class GeneralMethods {
 			case JACK_O_LANTERN:
 			case END_ROD:
 				return true;
+			default:
+				return false;
 		}
-		return false;
 	}
 }

src/com/projectkorra/projectkorra/firebending/FireBlast.java

@@ -204,11 +204,9 @@ public class FireBlast extends FireAbility {
 			return;
 		}
 
-		for (final Entity entity : GeneralMethods.getEntitiesAroundPoint(this.location, this.collisionRadius)) {
+		Entity entity = GeneralMethods.getClosestEntity(this.location, this.collisionRadius);
+		if (entity != null) {
 			this.affect(entity);
-			if (entity instanceof LivingEntity) {
-				break;
-			}
 		}
 
 		this.advanceLocation();