mirror of
https://github.com/sampletext32/ParkanPlayground.git
synced 2026-08-16 03:17:49 +04:00
73 lines
3.2 KiB
C#
73 lines
3.2 KiB
C#
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using System.Buffers.Binary;
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using System.Numerics;
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using NResLib;
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namespace ParkanPlayground;
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/// <summary>
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/// MSH-компонент 0x14: таблица локальных directional/probe light entries.
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/// Используется CAniMesh_IJointMesh::SampleMsh14Lights / AccumulateMsh14LightContributions.
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/// </summary>
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public static class Msh0x14
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{
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public const int ElementSize = 48;
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public static List<LightProbe> ReadComponent(
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FileStream mshFs, NResArchive archive)
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{
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var entry = archive.Files.FirstOrDefault(x => x.FileType == "14 00 00 00");
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if (entry is null)
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{
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throw new Exception("Archive doesn't contain file (14)");
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}
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if (entry.ElementSize != ElementSize)
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{
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throw new Exception("Light probe component (0x14) element size is not 48");
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}
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if (entry.FileLength % entry.ElementSize != 0)
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{
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throw new Exception("Light probe component (0x14) payload size is not divisible by element size");
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}
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var data = new byte[entry.FileLength];
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mshFs.Seek(entry.OffsetInFile, SeekOrigin.Begin);
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mshFs.ReadExactly(data, 0, data.Length);
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var elementBytes = data.Chunk(ElementSize);
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var elements = elementBytes.Select(x => new LightProbe(
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x00)),
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new Vector3(
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x04)),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x08)),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x0C))),
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new Vector3(
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x10)),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x14)),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x18))),
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new Vector4(
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x1C)),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x20)),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x24)),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x28))),
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BinaryPrimitives.ReadInt32LittleEndian(x.AsSpan(0x2C)))).ToList();
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return elements;
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}
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/// <summary>Light/probe entry 0x14.</summary>
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/// <param name="PieceIndex">[0x00..0x04] Индекс MSH_piece, чью world matrix используют для transform position/direction.</param>
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/// <param name="LocalPosition">[0x04..0x10] Локальная позиция источника/probe относительно PieceIndex.</param>
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/// <param name="LocalDirection">[0x10..0x1C] Локальное направление, transform direction через matrix piece.</param>
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/// <param name="Color">[0x1C..0x2C] RGBA/intensity color multiplier. В коде умножается на вычисленный strength.</param>
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/// <param name="Intensity">[0x2C..0x30] Scalar intensity. В коде участвует как * Intensity * 3.0.</param>
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public readonly record struct LightProbe(
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int PieceIndex,
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Vector3 LocalPosition,
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Vector3 LocalDirection,
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Vector4 Color,
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int Intensity);
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}
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