Added MobDeathTask.java which controls the death features of a mob. D…

…ropping currency & removing the sprite. Also added one line which adds this task to NPCFactory.java in the createBaseNPC() method.

source/core/src/main/com/csse3200/game/components/tasks/MobDeathTask.java

@@ -0,0 +1,122 @@
+package com.csse3200.game.components.tasks;
+
+import com.csse3200.game.ai.tasks.DefaultTask;
+import com.csse3200.game.ai.tasks.PriorityTask;
+import com.csse3200.game.components.CombatStatsComponent;
+import com.badlogic.gdx.math.Vector2;
+import com.csse3200.game.currency.Currency;
+import com.csse3200.game.entities.Entity;
+import com.csse3200.game.entities.factories.DropFactory;
+import com.csse3200.game.entities.factories.ProjectileFactory;
+import com.csse3200.game.physics.PhysicsEngine;
+import com.csse3200.game.physics.raycast.RaycastHit;
+import com.csse3200.game.services.ServiceLocator;
+import com.csse3200.game.services.GameTime;
+//import com.csse3200.game.rendering.DebugRenderer;
+
+
+/**
+ * Task that prints a message to the terminal whenever it is called.
+ */
+public class MobDeathTask extends DefaultTask implements PriorityTask {
+    private static final int INTERVAL = 1; // time interval to scan for towers in
+
+    private final int priority;
+    private Vector2 mobPosition = new Vector2(10f,10f);
+    private final PhysicsEngine physics;
+    private GameTime timeSource;
+    private long endTime;
+    private final RaycastHit hit = new RaycastHit();
+
+    private int mobHealth;
+
+    /**
+     * @param priority Task priority when shooting (0 when not chasing).
+     */
+    public MobDeathTask(int priority) {
+        this.priority = priority;
+
+        physics = ServiceLocator.getPhysicsService().getPhysics();
+
+        timeSource = ServiceLocator.getTimeSource();
+    }
+
+    @Override
+    public void start() {
+        super.start();
+        // gets starting health
+        this.mobHealth = owner.getEntity().getComponent(CombatStatsComponent.class).getHealth();
+        //sets mob position
+        this.mobPosition = owner.getEntity().getCenterPosition();
+        //sets endTime
+        endTime = timeSource.getTime() + (INTERVAL * 500);
+    }
+
+    @Override
+    public void update() {
+        if (timeSource.getTime() >= endTime) {
+            updateMobState();
+            endTime = timeSource.getTime() + (INTERVAL * 1000);
+        }
+    }
+
+    public void updateMobState() {
+
+        mobHealth = owner.getEntity().getComponent(CombatStatsComponent.class).getHealth();
+        // TODO: inset a bit that picks from a list of drop options and drops this
+
+        if (mobIsDead(mobHealth)) {
+            killMob();
+            dropCurrency();
+        }
+
+    }
+
+    @Override
+    public void stop() {
+        super.stop();
+    }
+
+    @Override
+    public int getPriority() {
+        if (status == Status.ACTIVE) {
+            return getActivePriority();
+        }
+
+        return getInactivePriority();
+    }
+
+    private int getActivePriority() {
+        if (mobHealth > 0) {
+            return -1;
+        }
+        return priority;
+    }
+
+    private int getInactivePriority() {
+        if (mobHealth <= 0) {
+            return priority;
+        }
+        return -1;
+    }
+    private boolean mobIsDead(int mobhealth) {
+
+        if (mobhealth <= 0) {
+            return true;
+        }
+        return false;
+    }
+
+    private void killMob() {
+        owner.getEntity().dispose();
+    }
+
+    private void dropCurrency() {
+
+        Entity scrap = DropFactory.createScrapDrop();
+        scrap.setPosition(mobPosition.x,mobPosition.y);
+        ServiceLocator.getEntityService().register(scrap);
+
+    }
+
+}

source/core/src/main/com/csse3200/game/entities/factories/NPCFactory.java

@@ -9,6 +9,7 @@
 import com.csse3200.game.components.npc.XenoAnimationController;
 import com.csse3200.game.components.TouchAttackComponent;
 import com.csse3200.game.components.tasks.MobAttackTask;
+import com.csse3200.game.components.tasks.MobDeathTask;
 import com.csse3200.game.components.tasks.WanderTask;
 import com.csse3200.game.entities.Entity;
 import com.csse3200.game.entities.Melee;
@@ -137,7 +138,8 @@ public static Entity createBaseNPC(Entity target) {
     AITaskComponent aiComponent =
         new AITaskComponent()
             .addTask(new WanderTask(new Vector2(2f, 2f), 2f))
-            .addTask(new MobAttackTask(2, 40));
+            .addTask(new MobAttackTask(2, 40))
+                .addTask(new MobDeathTask(2));
             //.addTask(new ChaseTask(target, 10, 3f, 4f));
     Entity npc =
         new Entity()