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bird_egop
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using System.Buffers.Binary;
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using Common;
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using NResLib;
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namespace ParkanPlayground;
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/// <summary>
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/// MSH-компонент 0x02: общий заголовок и таблица slot.
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/// </summary>
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public static class Msh0x02
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{
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public static Msh0x02Component ReadComponent(FileStream mshFs, NResArchive archive)
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{
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var fileEntry = archive.Files.FirstOrDefault(x => x.FileType == "02 00 00 00");
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if (fileEntry is null)
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{
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throw new Exception("Archive doesn't contain slots component (0x02)");
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}
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if (fileEntry.FileLength < 0x8c)
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{
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throw new Exception("Slots component (0x02) is smaller than the 0x8C-byte header");
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}
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if ((fileEntry.FileLength - 0x8c) % 68 != 0)
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{
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throw new Exception("Slots component (0x02) payload after header is not divisible by 68");
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}
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var data = new byte[fileEntry.FileLength];
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mshFs.Seek(fileEntry.OffsetInFile, SeekOrigin.Begin);
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mshFs.ReadExactly(data, 0, data.Length);
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var header = data.AsSpan(0, 0x8c); // заголовок (length = 0x8C)
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var center = new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(0x60)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(0x64)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(0x68))
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);
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var centerW = BinaryPrimitives.ReadSingleLittleEndian(header.Slice(0x6c));
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var bb = new BoundingBox(
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(0)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(4)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(8))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(12)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(16)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(20))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(24)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(28)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(32))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(36)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(40)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(44))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(48)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(52)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(56))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(60)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(64)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(68))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(72)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(76)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(80))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(84)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(88)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(92))
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));
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var bottom = new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(112)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(116)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(120))
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);
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var top = new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(124)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(128)),
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BinaryPrimitives.ReadSingleLittleEndian(header.Slice(132))
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);
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var xyRadius = BinaryPrimitives.ReadSingleLittleEndian(header.Slice(136));
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var elements = new List<Slot>();
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var skippedHeader = data.AsSpan(0x8c);
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var slotCount = skippedHeader.Length / 68;
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for (var i = 0; i < slotCount; i++)
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{
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var baseOffset = 68 * i;
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var opaque = new uint[5];
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for (var opaqueIndex = 0; opaqueIndex < opaque.Length; opaqueIndex++)
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{
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opaque[opaqueIndex] =
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BinaryPrimitives.ReadUInt32LittleEndian(skippedHeader.Slice(baseOffset + 48 + opaqueIndex * 4));
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}
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elements.Add(new Slot(
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BinaryPrimitives.ReadUInt16LittleEndian(skippedHeader.Slice(baseOffset + 0)),
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BinaryPrimitives.ReadUInt16LittleEndian(skippedHeader.Slice(baseOffset + 2)),
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BinaryPrimitives.ReadUInt16LittleEndian(skippedHeader.Slice(baseOffset + 4)),
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BinaryPrimitives.ReadUInt16LittleEndian(skippedHeader.Slice(baseOffset + 6)),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 8)),
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 12)),
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 16))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 20)),
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 24)),
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 28))
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),
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new Vector3(
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 32)),
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 36)),
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 40))
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),
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BinaryPrimitives.ReadSingleLittleEndian(skippedHeader.Slice(baseOffset + 44)),
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opaque));
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}
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return new Msh0x02Component(
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new Msh02Header(bb, center, centerW, bottom, top, xyRadius),
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elements);
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}
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/// <summary>Результат чтения MSH-компонента 0x02.</summary>
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/// <param name="Header">Заголовок 0x02 (length = 0x8C).</param>
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/// <param name="Elements">Slot records после заголовка.</param>
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public record class Msh0x02Component(Msh02Header Header, List<Slot> Elements);
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/// <summary>Заголовок 0x02 (length = 0x8C).</summary>
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/// <param name="BoundingBox">[0x00..0x60] Bounding box из 8 точек.</param>
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/// <param name="Center">[0x60..0x6C] Центральная точка.</param>
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/// <param name="CenterW">[0x6C..0x70] W-компонента центра.</param>
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/// <param name="Bottom">[0x70..0x7C] Нижняя точка.</param>
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/// <param name="Top">[0x7C..0x88] Верхняя точка.</param>
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/// <param name="XYRadius">[0x88..0x8C] Радиус в плоскости XY.</param>
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public record class Msh02Header(
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BoundingBox BoundingBox,
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Vector3 Center,
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float CenterW,
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Vector3 Bottom,
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Vector3 Top,
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float XYRadius);
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/// <summary>Slot 0x02 (length = 0x44).</summary>
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/// <param name="TriStart">[0x00..0x02] Первый triangle descriptor в Msh0x07. Для terrain-гипотезы может быть диапазоном Msh0x15.</param>
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/// <param name="TriCount">[0x02..0x04] Количество triangle descriptor в Msh0x07. Для terrain-гипотезы может быть count для Msh0x15.</param>
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/// <param name="BatchStart">[0x04..0x06] Первый batch в таблице 0x0D.</param>
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/// <param name="BatchCount">[0x06..0x08] Количество batch в таблице 0x0D</param>
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/// <param name="LocalMinimum">[0x08..0x14] Минимум локального AABB</param>
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/// <param name="LocalMaximum">[0x14..0x20] Максимум локального AABB</param>
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/// <param name="Center">[0x20..0x2C] Центр bounding sphere</param>
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/// <param name="SphereRadius">[0x2C..0x30] Радиус bounding sphere</param>
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/// <param name="Opaque">[0x30..0x44] Пять opaque dword</param>
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public record class Slot(
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ushort TriStart,
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ushort TriCount,
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ushort BatchStart,
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ushort BatchCount,
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Vector3 LocalMinimum,
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Vector3 LocalMaximum,
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Vector3 Center,
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float SphereRadius,
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uint[] Opaque);
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/// <summary>Bounding box заголовка: 8 точек по 3 float (length = 0x60).</summary>
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/// <param name="BottomFrontLeft">[0x00..0x0C] Нижняя передняя левая точка.</param>
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/// <param name="BottomFrontRight">[0x0C..0x18] Нижняя передняя правая точка.</param>
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/// <param name="BottomBackRight">[0x18..0x24] Нижняя задняя правая точка.</param>
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/// <param name="BottomBackLeft">[0x24..0x30] Нижняя задняя левая точка.</param>
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/// <param name="TopFrontLeft">[0x30..0x3C] Верхняя передняя левая точка.</param>
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/// <param name="TopFrontRight">[0x3C..0x48] Верхняя передняя правая точка.</param>
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/// <param name="TopBackRight">[0x48..0x54] Верхняя задняя правая точка.</param>
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/// <param name="TopBackLeft">[0x54..0x60] Верхняя задняя левая точка.</param>
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public record class BoundingBox(
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Vector3 BottomFrontLeft,
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Vector3 BottomFrontRight,
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Vector3 BottomBackRight,
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Vector3 BottomBackLeft,
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Vector3 TopFrontLeft,
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Vector3 TopFrontRight,
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Vector3 TopBackRight,
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Vector3 TopBackLeft);
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}
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