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feat(net): port retail physics spawn and event timestamps

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Parse the complete PhysicsDesc plus F754/F755 packets, correct every PhysicsState bit, and gate all nine retail update channels with generation-safe immutable snapshots. Preserve ForcePosition, teleport, placement, velocity, parent, pickup, delete, and same-generation CreateObject ordering from the named client.

Separate accepted logical lifecycle notifications from retained UI qualities, make GUID replacement and session reset clear every projection exactly once, and add packet, wraparound, malformed-input, parent FIFO, canonical-position, reconnect, and GUID-reuse conformance coverage.

Co-Authored-By: Codex <noreply@openai.com>
This commit is contained in:
Erik 2026-07-14 00:22:17 +02:00
parent d53fe30ffe
commit 8a5d77f7f4
50 changed files with 3809 additions and 649 deletions
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19
src/AcDream.Core.Net/Messages/DeleteObject.cs
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@ -17,23 +17,14 @@ public static class DeleteObject
{
public const uint Opcode = 0xF747u;
/// <param name="FromPickup">
/// <see langword="true"/> when this delete was sourced from a
/// <c>PickupEvent (0xF74A)</c> — the object left the 3-D world view but
/// the weenie record still exists (it is moving into a container).
/// <see langword="false"/> (default) when sourced from <c>DeleteObject
/// (0xF747)</c> — the weenie was destroyed and must be evicted from
/// <see cref="AcDream.Core.Items.ClientObjectTable"/>.
/// Retail two-table model: PickupEvent removes from <c>object_table</c>;
/// DeleteObject removes from <c>weenie_object_table</c>.
/// </param>
public readonly record struct Parsed(uint Guid, ushort InstanceSequence, bool FromPickup = false);
/// <summary>A true object-destruction event for one exact incarnation.</summary>
public readonly record struct Parsed(uint Guid, ushort InstanceSequence);
/// <summary>
/// Parse a 0xF747 body. <paramref name="body"/> must start with the
/// 4-byte opcode, matching every other parser in this namespace.
/// The returned <see cref="Parsed.FromPickup"/> is always <see langword="false"/>
/// — this parser handles true destroys only.
/// PickupEvent has a distinct parser and runtime event because it advances
/// POSITION_TS and retains the logical object.
/// </summary>
public static Parsed? TryParse(ReadOnlySpan<byte> body)
{
@ -46,6 +37,6 @@ public static class DeleteObject
uint guid = BinaryPrimitives.ReadUInt32LittleEndian(body.Slice(4, 4));
ushort instanceSequence = BinaryPrimitives.ReadUInt16LittleEndian(body.Slice(8, 2));
return new Parsed(guid, instanceSequence, FromPickup: false);
return new Parsed(guid, instanceSequence);
}
}