Minor correction to withinDistance to check for Z axis

Tar Barrel Handler added with REAL mechanics

Server/src/main/java/Server/core/game/interaction/object/TarBarrelHandler.kt

@@ -0,0 +1,63 @@
+package core.game.interaction.`object`
+
+import core.cache.def.impl.ObjectDefinition
+import core.game.interaction.OptionHandler
+import core.game.node.Node
+import core.game.node.`object`.ObjectBuilder
+import core.game.node.entity.player.Player
+import core.game.node.item.Item
+import core.plugin.Initializable
+import core.plugin.Plugin
+import core.tools.Items
+import core.tools.RandomFunction
+
+/**
+ * @author Woah, with love
+ * Item(s):
+ *  Swamp tar - ID: 1939
+ * Object(s):
+ *  Tar barrel (full) - ID: 16860 | Tar barrel (empty) - ID: 16688
+ * Option(s):
+ *  "Take-from"
+ */
+@Initializable
+class TarBarrelHandler : OptionHandler() {
+
+    val FULL_TAR_BARREL_16860 = 16860
+    val EMPTY_TAR_BARREL_16688 = 16688
+    val EMPTY_BARREL_STRING = "The barrel became empty!"
+
+    override fun newInstance(arg: Any?): Plugin<Any> {
+        ObjectDefinition.forId(FULL_TAR_BARREL_16860).handlers["option:take-from"] = this
+        return this
+    }
+
+    override fun handle(player: Player?, node: Node?, option: String?): Boolean {
+        player ?: return false
+        node ?: return false
+
+        val incrementAmount = RandomFunction.random(83, 1000)
+
+        when (option) {
+            "take-from" -> {
+                if (player.inventory.isFull) {
+                    player.sendMessage("Not enough space in your inventory!")
+                    return true
+                }
+
+                if (node.asObject().charge >= 0) {
+                    node.asObject().charge = node.asObject().charge - incrementAmount
+                    player.inventory.add(Item(Items.SWAMP_TAR_1939))
+
+                    if (node.asObject().charge <= 0) {
+                        player.sendMessage(EMPTY_BARREL_STRING)
+                        ObjectBuilder.replace(node.asObject(), node.asObject().transform(EMPTY_TAR_BARREL_16688),38)
+                        node.asObject().charge = 1000
+                    }
+                }
+                return true
+            }
+        }
+        return true
+    }
+}

Server/src/main/java/Server/core/game/world/map/Location.java

@@ -65,8 +65,6 @@ public final class Location extends Node {
 		this(x + RandomFunction.getRandom(randomizer), y + RandomFunction.getRandom(randomizer), z);
 	}
 
-
-
 	/**
 	 * Construct a new Location.
 	 * @param x The x-coordinate.
@@ -219,6 +217,10 @@ public final class Location extends Node {
      * @return If you're within the other distance.
      */
 	public boolean withinDistance(Location other, int dist) {
+	    if (other.z != z) {
+	        return false;
+        }
+
 		int a = (other.x - x);
 		int b = (other.y - y);
 		double product = Math.sqrt((a*a) + (b*b));