/// <summary>
/// Adds a new npc to the character's client.
/// </summary>
/// <param name="character">The client to add npc for.</param>
/// <param name="npc">The npc to add.</param>
/// <param name="mainPacket">The packet composer to append bits to.</param>
public static void AddNewNpc(Character character, Npc npc, PacketComposer mainPacket)
{
mainPacket.AppendBits(15, npc.Index);
mainPacket.AppendBits(14, npc.CacheIndex);
mainPacket.AppendBits(1, npc.UpdateFlags.UpdateRequired ? 1 : 0);
int xPos = npc.Location.X - character.Location.X;
int yPos = npc.Location.Y - character.Location.Y;
if (xPos < 0)
{
xPos += 32;
}
if (yPos < 0)
{
yPos += 32;
}
mainPacket.AppendBits(5, yPos);
mainPacket.AppendBits(5, xPos);
mainPacket.AppendBits(3, 0);
mainPacket.AppendBits(1, 1);
}
/// <summary>
/// Constructs the npc rendering packet.
/// </summary>
/// <param name="character">Character to send rendered npcs to.</param>
/// <param name="allNpcs">A list of npcs that are spawned on the server.</param>
public NpcRenderingPacketComposer(Character character, List <Npc> allNpcs)
{
SetOpcode(222);
SetType(PacketType.Short);
InitializeBit();
// The update block. Any updates that are pending will be added to this block.
GenericPacketComposer updateBlock = new GenericPacketComposer();
AppendBits(8, character.LocalNpcs.Count);
// A bin of npcs that have been removed during local npc updating.
List <Npc> npcBin = new List <Npc>();
character.LocalNpcs.ForEach((npc) =>
{
if (GameEngine.World.NpcManager.Spawns.Values.Contains(npc) &&
npc.Location.WithinDistance(character.Location) &&
!character.UpdateFlags.Teleporting)
{
UpdateMovement(npc, this);
// Update the npc is required, since it is conditionally valid.
if (npc.UpdateFlags.UpdateRequired)
{
RenderMasks.AppendMasks(npc, updateBlock);
}
}
else
{
// Remove this npc, as it doesn't meet local standards.
npcBin.Add(npc);
// Signify the client that this npc needs to be removed.
AppendBits(1, 1);
AppendBits(2, 3);
}
});
// Remove all binned npcs.
npcBin.ForEach((npc) => character.LocalNpcs.Remove(npc));
// Search for npcs that may qualify for locality.
foreach (Npc npc in allNpcs)
{
// We cannot have more than 255 npcs in the client simultaneously.
if (character.LocalNpcs.Count >= 255)
{
break;
}
if (character.LocalNpcs.Contains(npc) || !npc.Location.WithinDistance(character.Location))
{
continue;
}
character.LocalNpcs.Add(npc);
AddNewNpc(character, npc, this);
// Update the npc if required.
if (npc.UpdateFlags.UpdateRequired)
{
RenderMasks.AppendMasks(npc, updateBlock);
}
}
// Finalize the composition.
if (updateBlock.Position >= 3)
{
AppendBits(15, 32767);
}
FinishBit();
if (updateBlock.Position > 0)
{
AppendBytes(updateBlock.SerializeBuffer());
}
}
