Add support for checking the bounds of entities

game/src/main/java/org/apollo/game/model/entity/Entity.java

@@ -20,6 +20,11 @@ public abstract class Entity {
 	 */
 	protected final World world;
 
+	/**
+	 * The EntityBounds for this Entity.
+	 */
+	private EntityBounds bounds;
+
 	/**
 	 * Creates the Entity.
 	 *
@@ -34,6 +39,20 @@ public abstract class Entity {
 	@Override
 	public abstract boolean equals(Object obj);
 
+	/**
+	 * Gets the {@link EntityBounds} for this Entity.
+	 *
+	 * @return The EntityBounds.
+	 */
+	public EntityBounds getBounds() {
+
+		if(bounds == null) {
+			bounds = new EntityBounds(this);
+		}
+
+		return bounds;
+	}
+
 	/**
 	 * Gets the {@link Position} of this Entity.
 	 *
@@ -59,6 +78,20 @@ public abstract class Entity {
 	 */
 	public abstract EntityType getEntityType();
 
+	/**
+	 * Gets the length of this Entity.
+	 *
+	 * @return The length.
+	 */
+	public abstract int getLength();
+
+	/**
+	 * Gets the width of this Entity.
+	 *
+	 * @return The width.
+	 */
+	public abstract int getWidth();
+
 	@Override
 	public abstract int hashCode();
 

game/src/main/java/org/apollo/game/model/entity/EntityBounds.java

@@ -0,0 +1,48 @@
+package org.apollo.game.model.entity;
+
+import org.apollo.game.model.Position;
+
+/**
+ * The bounds of an {@link Entity}.
+ *
+ * @author Steve Soltys
+ */
+public class EntityBounds {
+
+	/**
+	 * The {@link Entity}.
+	 */
+	private final Entity entity;
+
+	/**
+	 * Creates an EntityBounds.
+	 *
+	 * @param entity The entity.
+	 */
+	EntityBounds(Entity entity) {
+		this.entity = entity;
+	}
+
+	/**
+	 * Checks whether the given position is within the Entity's bounds.
+	 *
+	 * @param position The position.
+	 * @return A flag indicating whether or not the position exists within the Entity's bounds.
+	 */
+	public boolean contains(Position position) {
+		int positionX = position.getX();
+		int positionY = position.getY();
+		int positionHeight = position.getHeight();
+
+		int entityX = entity.getPosition().getX();
+		int entityY = entity.getPosition().getY();
+		int entityHeight = entity.getPosition().getHeight();
+
+		int width = entity.getWidth();
+		int length = entity.getLength();
+
+		return positionX >= entityX && positionX < entityX + width &&
+			positionY >= entityY && positionY < entityY + length &&
+			positionHeight == entityHeight;
+	}
+}

game/src/main/java/org/apollo/game/model/entity/GroundItem.java

@@ -80,6 +80,16 @@ public final class GroundItem extends Entity implements GroupableEntity {
 		return EntityType.GROUND_ITEM;
 	}
 
+	@Override
+	public int getLength() {
+		return 1;
+	}
+
+	@Override
+	public int getWidth() {
+		return 1;
+	}
+
 	/**
 	 * Gets the {@link Item} displayed on the ground.
 	 *

game/src/main/java/org/apollo/game/model/entity/Mob.java

@@ -327,6 +327,16 @@ public abstract class Mob extends Entity {
 		return walkingQueue;
 	}
 
+	@Override
+	public int getLength() {
+		return definition.map(NpcDefinition::getSize).orElse(1);
+	}
+
+	@Override
+	public int getWidth() {
+		return definition.map(NpcDefinition::getSize).orElse(1);
+	}
+
 	/**
 	 * Returns whether or not this mob has an {@link NpcDefinition}.
 	 *

game/src/main/java/org/apollo/game/model/entity/Projectile.java

@@ -414,6 +414,16 @@ public final class Projectile extends Entity implements GroupableEntity {
 		return EntityType.PROJECTILE;
 	}
 
+	@Override
+	public int getLength() {
+		return 1;
+	}
+
+	@Override
+	public int getWidth() {
+		return 1;
+	}
+
 	@Override
 	public int hashCode() {
 		return Objects.hashCode(position, destination, delay, lifetime, target, startHeight,

game/src/main/java/org/apollo/game/model/entity/obj/GameObject.java

@@ -2,6 +2,7 @@ package org.apollo.game.model.entity.obj;
 
 import org.apollo.cache.def.ObjectDefinition;
 import org.apollo.game.model.Position;
+import org.apollo.game.model.Direction;
 import org.apollo.game.model.World;
 import org.apollo.game.model.area.EntityUpdateType;
 import org.apollo.game.model.area.Region;
@@ -85,6 +86,23 @@ public abstract class GameObject extends Entity implements GroupableEntity {
 		return packed >> 2 & 0x3F;
 	}
 
+
+	@Override
+	public int getLength() {
+		Direction direction = Direction.WNES[getOrientation()];
+
+		return direction == Direction.WEST || direction == Direction.EAST ?
+			getDefinition().getWidth() : getDefinition().getLength();
+	}
+
+	@Override
+	public int getWidth() {
+		Direction direction = Direction.WNES[getOrientation()];
+
+		return direction == Direction.WEST || direction == Direction.EAST ?
+			getDefinition().getLength() : getDefinition().getWidth();
+	}
+
 	@Override
 	public int hashCode() {
 		return packed;
@@ -109,5 +127,4 @@ public abstract class GameObject extends Entity implements GroupableEntity {
 	 * @return {@code true} if the Player can see this GameObject, {@code false} if not.
 	 */
 	public abstract boolean viewableBy(Player player, World world);
-
 }