102 lines
3.9 KiB
C#
102 lines
3.9 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright 2019-2023 - 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 Server.Network;
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namespace Server.Multis.Boats
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{
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public static class BoatPackets
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{
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public static void SendMoveBoatHS(this NetState ns, Mobile beholder, BaseBoat boat,
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Direction d, int speed, BaseBoat.MovingEntitiesEnumerable ents, int xOffset, int yOffset)
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{
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if (ns?.HighSeas != true)
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{
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return;
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}
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const int minLength = 68; // 18 + 5 * 10
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var writer = new SpanWriter(stackalloc byte[minLength], true);
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writer.Write((byte)0xF6); // Packet ID
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writer.Seek(2, SeekOrigin.Current);
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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.Seek(2, SeekOrigin.Current); // count
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var count = 0;
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foreach (var ent in ents)
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{
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// If we assume that the entities list contains everything a player can see,
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// then this can be removed and the packet can be written once and copied to improve performance
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if (!beholder.CanSee(ent))
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{
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continue;
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}
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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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++count;
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}
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writer.Seek(16, SeekOrigin.Begin);
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writer.Write((short)count);
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writer.WritePacketLength();
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ns.Send(writer.Span);
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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)
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{
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return;
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}
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var 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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Span<byte> buffer = builder.GetSpan(OutgoingEntityPackets.MaxWorldEntityPacketLength);
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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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buffer.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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}
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