51 lines
1.4 KiB
C#
51 lines
1.4 KiB
C#
using System.Diagnostics;
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using TanksServer.GameLogic;
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using TanksServer.Graphics;
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namespace TanksServer.Interactivity;
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internal sealed class PlayerScreenData(ILogger logger, Player player)
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{
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private readonly Memory<byte> _data = new byte[MapService.PixelsPerRow * MapService.PixelsPerColumn / 2];
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private int _count;
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public ReadOnlyMemory<byte> Build(GamePixelGrid gamePixelGrid)
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{
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Clear();
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foreach (var gamePixel in gamePixelGrid)
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{
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if (!gamePixel.EntityType.HasValue)
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continue;
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Add(gamePixel.EntityType.Value, gamePixel.BelongsTo == player);
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}
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var index = _count / 2 + (_count % 2 == 0 ? 0 : 1);
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if (logger.IsEnabled(LogLevel.Trace))
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logger.LogTrace("packet length: {} (count={})", index, _count);
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return _data[..index];
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}
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private void Add(GamePixelEntityType entityKind, bool isCurrentPlayer)
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{
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var result = (byte)(isCurrentPlayer ? 0x1 : 0x0);
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var kind = (byte)entityKind;
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Debug.Assert(kind <= 3);
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result += (byte)(kind << 2);
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var index = _count / 2;
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if (_count % 2 != 0)
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_data.Span[index] |= (byte)(result << 4);
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else
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_data.Span[index] = result;
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_count++;
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}
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private void Clear()
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{
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_count = 0;
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_data.Span.Clear();
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}
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}
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