/// <summary>
/// Drops item to the map as an ItemMonster.
/// </summary>
/// <remarks>
/// Items are typically dropped by "tossing" them from the source,
/// such as a killed monster. The given position is the initial
/// position, and the item is then tossed in the given direction,
/// by the distance.
/// </remarks>
/// <param name="map">Map to drop to the item on.</param>
/// <param name="position">Initial position of the drop item.</param>
/// <param name="direction">Direction to toss the item in.</param>
/// <param name="distance">Distance to toss the item.</param>
public ItemMonster Drop(Map map, Position position, Direction direction, float distance)
{
// ZC_NORMAL_ItemDrop animates the item flying from its
// initial drop position to its final position. To keep
// everything in sync, we use the monster's position as
// the drop position, then add the item to the map,
// and then make it fly and set the final position.
// the direction of the item becomes the direction
// it flies in.
// FromGround is necessary for the client to attempt to
// pick up the item. Might act as "IsYourDrop" for items.
var itemMonster = ItemMonster.Create(this);
var flyDropPos = position.GetRelative(direction, distance);
itemMonster.Position = position;
itemMonster.Direction = direction;
itemMonster.FromGround = true;
itemMonster.DisappearTime = DateTime.Now.AddSeconds(ChannelServer.Instance.Conf.World.DropDisappearSeconds);
map.AddMonster(itemMonster);
itemMonster.Position = flyDropPos;
Send.ZC_NORMAL_ItemDrop(itemMonster, direction, distance);
return(itemMonster);
}
/// <summary>
/// Creates item monster from item.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public static ItemMonster Create(Item item)
{
if (!ChannelServer.Instance.Data.ItemMonsterDb.TryFind(item.Id, out var data))
{
throw new ArgumentException($"No monster id found for item '{item.Id}'.");
}
var monster = new ItemMonster(item, data.MonsterId);
return(monster);
}
/// <summary>
/// Turns item monster into an item and adds it to the character's
/// inventory.
/// </summary>
/// <param name="itemMonster"></param>
public void PickUp(ItemMonster itemMonster)
{
itemMonster.PickedUp = true;
itemMonster.Item.ClearProtections();
// Play pickup animation. This is what actually makes the item
// disappear, the client doesn't seem to react to ZC_LEAVE in
// the case of items. Or at least not reliably? It's weird.
Send.ZC_ITEM_GET(this, itemMonster);
// Add the item to the inventory
this.Inventory.Add(itemMonster.Item, InventoryAddType.PickUp);
// Remove it from the map, so it can't be picked up again.
this.Map.RemoveMonster(itemMonster);
}
