Struct RewindTarget

Namespace

FishMMO.Shared

Assembly

FishMMO.Shared.dll

A point in the past to rewind the world to: a whole tick, plus how far before that tick the target actually sits.

public readonly struct RewindTarget

Inherited Members

ValueType.Equals(object)

ValueType.GetHashCode()

ValueType.ToString()

object.Equals(object, object)

object.GetType()

object.ReferenceEquals(object, object)

Remarks

A bare tick was not enough to reproduce what a client saw. Its view of a peer is produced by NetworkTransform interpolation, which blends between two received snapshots and lands somewhere between two ticks — so a rewind quantised to a tick boundary reproduces a position the client never displayed. At 6 m/s one tick is 20 cm, which is the difference between a hit and a miss on a capsule.

SubTickFraction is in [0,1) and measured backwards, so Tick = 100, SubTickFraction = 0.25 means "a quarter of a tick before tick 100" — that is, 75% of the way from tick 99 to tick 100. Zero means exactly on the tick, which is what every caller that has no sub-tick information should use.

Constructors

RewindTarget(uint, float)

public RewindTarget(uint tick, float subTickFraction = 0)

Parameters

tick uint

subTickFraction float

Fields

IsValid

True when this target names a real tick.

public readonly bool IsValid

Field Value

bool

SubTickFraction

How far before Tick the target sits, in ticks, in [0,1).

public readonly float SubTickFraction

Field Value

float

Tick

The whole tick the target sits on or just before.

public readonly uint Tick

Field Value

uint

Properties

AsFractionalTick

The target as a fractional tick, for logging and tests.

public double AsFractionalTick { get; }

Property Value

double

None

A target that names nothing; callers should not rewind.

public static RewindTarget None { get; }

Property Value

RewindTarget

Methods

GetBounds(out uint, out uint, out float)

The two ticks this target lies between, and how far along it sits.

public void GetBounds(out uint olderTick, out uint newerTick, out float alpha)

Parameters

olderTick uint

The tick immediately before the target (or the target's own tick).

newerTick uint

The tick immediately after the target (or the target's own tick).

alpha float

Interpolation weight from olderTick toward newerTick.

Remarks

With a zero fraction both bounds are Tick and alpha is 1, so a caller with no sub-tick information resolves exactly the sample it asked for.