123 lines
4.3 KiB
C#
123 lines
4.3 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright 2019-2026 - ModernUO Development Team *
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* Email: hi@modernuo.com *
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* File: BoatPackets.cs *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*************************************************************************/
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using System;
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using System.Buffers;
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using System.IO;
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using System.Runtime.CompilerServices;
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using Server.Collections;
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using Server.Network;
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namespace Server.Multis.Boats;
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public static class BoatPackets
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{
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static int GetMoveBoatHSPacketLength(int entityCount) => 18 + Math.Min(entityCount, 0xFFFF) * 10;
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private static void CreateMoveBoatHS(
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Span<byte> buffer, BaseBoat boat, PooledRefList<IEntity> entities,
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Direction d, int speed, int xOffset, int yOffset
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)
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{
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// Already initialized, so we don't have to create it again.
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if (buffer[0] != 0)
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{
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return;
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}
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var count = Math.Min(entities.Count, 0xFFFF);
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var writer = new SpanWriter(buffer);
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writer.Write((byte)0xF6); // Packet ID
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writer.Seek(2, SeekOrigin.Current); // Length
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writer.Write(boat.Serial);
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writer.Write((byte)speed);
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writer.Write((byte)d);
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writer.Write((byte)boat.Facing);
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writer.Write((short)(boat.X + xOffset));
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writer.Write((short)(boat.Y + yOffset));
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writer.Write((short)boat.Z);
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writer.Write((short)count);
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for (var i = 0; i < count; i++)
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{
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var ent = entities[i];
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writer.Write(ent.Serial);
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writer.Write((short)(ent.X + xOffset));
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writer.Write((short)(ent.Y + yOffset));
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writer.Write((short)ent.Z);
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}
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writer.WritePacketLength();
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}
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public static void SendMoveBoatHS(this NetState ns, BaseBoat boat,
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PooledRefList<IEntity> entities, Direction d, int speed, int xOffset, int yOffset)
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{
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if (ns.CannotSendPackets())
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{
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return;
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}
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var moveBoatPacket = stackalloc byte[GetMoveBoatHSPacketLength(entities.Count)]
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.InitializePacket();
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CreateMoveBoatHS(moveBoatPacket, boat, entities, d, speed, xOffset, yOffset);
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ns.Send(moveBoatPacket);
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}
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public static void SendMoveBoatHSUsingCache(this NetState ns, Span<byte> cache, BaseBoat boat,
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PooledRefList<IEntity> entities, Direction d, int speed, int xOffset, int yOffset)
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{
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if (ns.CannotSendPackets())
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{
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return;
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}
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CreateMoveBoatHS(cache, boat, entities, d, speed, xOffset, yOffset);
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ns.Send(cache);
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}
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public static void SendDisplayBoatHS(this NetState ns, Mobile beholder, BaseBoat boat)
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{
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if (ns?.HighSeas != true || ns.CannotSendPackets())
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{
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return;
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}
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const int minLength = PacketContainerBuilder.MinPacketLength
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+ OutgoingEntityPackets.MaxWorldEntityPacketLength
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* 5; // Minimum of boat, hold, planks, and the player
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using var builder = new PacketContainerBuilder(stackalloc byte[minLength]);
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foreach (var entity in boat.GetMovingEntities(true))
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{
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if (!beholder.CanSee(entity))
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{
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continue;
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}
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var buffer = builder.GetSpan(OutgoingEntityPackets.MaxWorldEntityPacketLength).InitializePacket();
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var bytesWritten = OutgoingEntityPackets.CreateWorldEntity(buffer, entity, true);
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builder.Advance(bytesWritten);
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}
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ns.Send(builder.Finalize());
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}
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}
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