private void addEnemy(Enemy enemy, float enemySize, Vector3f spawn) {
float areaSizeX = 20f;
float areaSizeZ = 20f;
WalkableArea wa = new WalkableRectangle(spawn.getX() - (areaSizeX / 2f), spawn.getZ() - (areaSizeZ / 2f), 20f, 20f);
enemy.getSpatial().addControl(new MoveRandomControl(enemy, wa));
enemy.getSpatial().addControl(new AggroControl(enemy, 25f, enemySize,
PhysicsCollisionObject.COLLISION_GROUP_02,
PhysicsCollisionObject.COLLISION_GROUP_03,
new AggroBehaviorChase(wa, 6f),
new AggroBehaviorFight(1f, 2f)));
enemy.finalise();