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feat(runtime): seal dormant SetPosition evaluations

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This commit is contained in:
Erik 2026-08-01 11:31:58 +02:00
parent 22651c823d
commit 99f867f053
16 changed files with 2298 additions and 62 deletions
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182
src/AcDream.Runtime/Physics/RuntimeSetPositionState.cs
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@ -1,5 +1,6 @@
using System.Collections.Immutable;
using System.Numerics;
using AcDream.Core.Items;
using AcDream.Core.Net.Messages;
using AcDream.Core.Physics;
using AcDream.Runtime.Entities;
@ -82,6 +83,32 @@ internal readonly record struct RuntimeSetPositionCommand(
float ShadowWorldOffsetY = 0f,
RuntimePortalPlacementAuthority Portal = default);
internal readonly record struct RuntimeCollisionGenerationAuthority(
uint LandblockId,
ulong Generation);
internal readonly record struct RuntimeCollisionEvaluationAuthority(
ulong CollisionWorldAuthority,
ulong ShadowWorldAuthority,
ClientObjectTable? ObjectTable,
ulong ObjectTableBindingAuthority,
ulong ObjectTableAuthority,
ImmutableArray<RuntimeCollisionGenerationAuthority> Generations)
{
internal bool IsValid => CollisionWorldAuthority != 0UL
&& !Generations.IsDefault;
}
internal readonly record struct RuntimeDormantSetPositionEvaluation(
RuntimeEntityPlacementToken Placement,
RuntimeSetPositionCommand Command,
PhysicsSetPositionResult Result,
RuntimeCollisionEvaluationAuthority CollisionAuthority)
{
internal bool IsValid => Placement.IsValid
&& CollisionAuthority.IsValid;
}
public readonly record struct RuntimePlacementProjectionToken(
ulong Sequence,
ulong Revision,
@ -597,6 +624,98 @@ internal sealed class RuntimeSetPositionState : IDisposable
&& IsPreparationAuthorityCurrent(operation, authority);
}
/// <summary>
/// Evaluates the exact authored local-player placement without mutating
/// the canonical dormant body or any Runtime ownership index. Core's
/// SetPosition transaction is pure; collision reporting is deliberately
/// omitted until the later atomic activation commit.
/// </summary>
internal bool TryEvaluateDormantLocalActivation(
RuntimeEntityRecord record,
PhysicsBody body,
in RuntimeEntityPlacementToken token,
in RuntimeSetPositionCommand command,
out RuntimeDormantSetPositionEvaluation evaluation)
{
EnsureNotDisposed();
ArgumentNullException.ThrowIfNull(record);
ArgumentNullException.ThrowIfNull(body);
evaluation = default;
if (!IsExactDormantLocalActivationCurrent(
record,
body,
token,
command,
out Operation? operation))
{
return false;
}
PhysicsSetPositionRequest canonicalRequest = command.Physics with
{
MoverPhysicsState = record.FinalPhysicsState,
MovingEntityId = token.Entity.LocalEntityId,
CurrentCellId = null,
};
if (!IsStructurallyValid(canonicalRequest))
return false;
var canonicalCommand = command with { Physics = canonicalRequest };
ulong collisionWorldAuthority = _physics.CollisionWorldAuthority;
ulong shadowWorldAuthority = _physics.ShadowWorldAuthority;
ClientObjectTable? objectTable = _physics.ObjectTable;
ulong objectTableBindingAuthority =
_physics.ObjectTableBindingAuthority;
ulong objectTableAuthority = objectTable?.MutationRevision ?? 0UL;
PhysicsSetPositionResult result = _physics.Engine.SetPosition(
canonicalRequest,
handleCollisions: null);
if (!IsExactDormantLocalActivationCurrent(
record,
body,
token,
command,
out Operation? current)
|| !ReferenceEquals(current, operation))
{
return false;
}
if (!_physics.TrySealCollisionEvaluationAuthority(
result,
collisionWorldAuthority,
shadowWorldAuthority,
objectTable,
objectTableBindingAuthority,
objectTableAuthority,
out RuntimeCollisionEvaluationAuthority collisionAuthority))
{
return false;
}
evaluation = new RuntimeDormantSetPositionEvaluation(
token,
canonicalCommand,
result,
collisionAuthority);
return true;
}
internal bool IsDormantLocalEvaluationCurrent(
RuntimeEntityRecord record,
PhysicsBody body,
in RuntimeDormantSetPositionEvaluation evaluation) =>
evaluation.IsValid
&& IsExactDormantLocalActivationCurrent(
record,
body,
evaluation.Placement,
evaluation.Command,
out _,
allowCanonicalCommand: true)
&& _physics.IsCollisionEvaluationAuthorityCurrent(
evaluation.CollisionAuthority);
internal RuntimeSetPositionOutcome SubmitPreparedPlacement(
in RuntimeEntityPlacementToken token,
in RuntimeSetPositionCommand command) =>
@ -1881,6 +2000,69 @@ internal sealed class RuntimeSetPositionState : IDisposable
&& operation.Record.PlacementCommitVersion
== operation.PlacementCommitVersion;
private bool IsExactDormantLocalActivationCurrent(
RuntimeEntityRecord record,
PhysicsBody body,
in RuntimeEntityPlacementToken token,
in RuntimeSetPositionCommand command,
out Operation? operation,
bool allowCanonicalCommand = false)
{
operation = null;
if (!token.IsValid
|| token.Entity != record.Key
|| token.PreparationKind
is not RuntimeEntityPlacementPreparationKind.AuthoredMover
|| command.Kind is not (RuntimeSetPositionOperationKind.InitialLogin
or RuntimeSetPositionOperationKind.LocalAuthoritative)
|| command.Portal != default
&& !command.Portal.IsValid
|| !_operations.TryGetValue(token.Entity, out operation)
|| operation.Token != token
|| operation.Stage
is not RuntimeEntityPlacementStage.AwaitingPreparation
|| !ReferenceEquals(operation.Record, record)
|| !IsCurrent(operation)
|| !ReferenceEquals(record.PhysicsBody, body)
|| body.InWorld
|| (body.TransientState & TransientStateFlags.Active) != 0
|| record.PhysicsHost is not null
|| record.RemoteMotion is not null
|| record.Projectile is not null
|| record.PhysicsBodyAcquisitionInProgress
|| record.RemoteMotionBindingInProgress
|| record.ProjectileBindingInProgress
|| record.RequiresRemotePlacementRuntime
|| record.DeleteAcceptedForTeardown
|| _physics.IsSpatialRoot(record)
|| !_moverPreparationAuthorities.TryGetValue(
token.Entity,
out MoverPreparationAuthority authority)
|| authority.OperationId != token.OperationId
|| !authority.Prepared
|| !IsPreparationAuthorityCurrent(operation, authority))
{
operation = null;
return false;
}
if (authority.PreparedCommand == command)
return true;
if (!allowCanonicalCommand)
return false;
RuntimeSetPositionCommand authored = authority.PreparedCommand;
return authored with
{
Physics = authored.Physics with
{
MoverPhysicsState = record.FinalPhysicsState,
MovingEntityId = token.Entity.LocalEntityId,
CurrentCellId = null,
},
} == command;
}
private bool IsVelocityCurrent(Operation operation) =>
operation.SourceVelocityAuthorityVersion == 0UL
|| operation.Record.VelocityAuthorityVersion