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feat(combat): port retail held weapon parenting

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Select the default combat mode from ordered equipped objects so bows request missile stance. Parse CreateObject parent metadata and ParentEvent, then render held objects as separate children composed from setup holding locations and placement frames each animation tick.
This commit is contained in:
Erik 2026-07-11 13:02:26 +02:00
parent 564d39dfea
commit ab6d96d113
18 changed files with 1152 additions and 17 deletions
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26
src/AcDream.Core.Net/Messages/CreateObject.cs
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@ -122,6 +122,12 @@ public static class CreateObject
// L.2g S1 (DEV-6): ObjectMovement stamp (timestamp block index 1)
// seeds MotionSequenceGate's MOVEMENT_TS at spawn.
ushort MovementSequence = 0,
// Parent/placement bootstrap for equipped child objects. These are
// the CreateObject equivalents of ParentEvent 0xF749.
ushort PositionSequence = 0,
uint? ParentGuid = null,
uint? ParentLocation = null,
uint? PlacementId = null,
uint? PhysicsState = null,
uint? ObjectDescriptionFlags = null,
// L.3b (2026-04-30): per-object friction + elasticity from the
@ -522,6 +528,10 @@ public static class CreateObject
physicsState = BinaryPrimitives.ReadUInt32LittleEndian(body.Slice(pos));
pos += 4;
uint? placementId = null;
uint? parentGuid = null;
uint? parentLocation = null;
if ((physicsFlags & PhysicsDescriptionFlag.Movement) != 0)
{
// u32 length, length bytes of serialized MovementData (no header
@ -543,6 +553,7 @@ public static class CreateObject
else if ((physicsFlags & PhysicsDescriptionFlag.AnimationFrame) != 0)
{
if (body.Length - pos < 4) return null;
placementId = BinaryPrimitives.ReadUInt32LittleEndian(body.Slice(pos));
pos += 4;
}
@ -593,7 +604,9 @@ public static class CreateObject
if ((physicsFlags & PhysicsDescriptionFlag.Parent) != 0)
{
if (body.Length - pos < 8) return null;
pos += 8; // wielderId u32 + parentLocation u32
parentGuid = BinaryPrimitives.ReadUInt32LittleEndian(body.Slice(pos));
parentLocation = BinaryPrimitives.ReadUInt32LittleEndian(body.Slice(pos + 4));
pos += 8;
}
if ((physicsFlags & PhysicsDescriptionFlag.Children) != 0)
{
@ -643,6 +656,7 @@ public static class CreateObject
if (body.Length - pos < 9 * 2) return PartialResult();
var seqSpan = body.Slice(pos, 9 * 2);
ushort instanceSeq = BinaryPrimitives.ReadUInt16LittleEndian(seqSpan.Slice(8 * 2));
ushort positionSeq = BinaryPrimitives.ReadUInt16LittleEndian(seqSpan.Slice(0 * 2));
ushort movementSeq = BinaryPrimitives.ReadUInt16LittleEndian(seqSpan.Slice(1 * 2));
ushort teleportSeq = BinaryPrimitives.ReadUInt16LittleEndian(seqSpan.Slice(4 * 2));
ushort serverControlSeq = BinaryPrimitives.ReadUInt16LittleEndian(seqSpan.Slice(5 * 2));
@ -984,8 +998,14 @@ public static class CreateObject
textureChanges, subPalettes, basePaletteId, objScale, name, itemType, motionState, motionTableId,
instanceSeq, teleportSeq, serverControlSeq, forcePositionSeq,
movementSeq,
physicsState, objectDescriptionFlags,
friction, elasticity,
PositionSequence: positionSeq,
ParentGuid: parentGuid,
ParentLocation: parentLocation,
PlacementId: placementId,
PhysicsState: physicsState,
ObjectDescriptionFlags: objectDescriptionFlags,
Friction: friction,
Elasticity: elasticity,
IconId: iconId,
Useability: useability, UseRadius: useRadius, TargetType: targetType,
IconOverlayId: iconOverlayId, IconUnderlayId: iconUnderlayId,