public void BeginSimulation(uint tick)
{
lastIndex = MomentumIndexForTick(tick);
if (!lastIndex.valid)
{
lastIndex = TrailIndex.zero;
}
if (currentIndex != lastIndex)
{
ClearContacts();
ApplyMomentum(this[lastIndex]);
}
if (lastIndex.segment < momentums.Count - 1)
{
momentums.RemoveRange(
lastIndex.segment + 1,
momentums.Count - (lastIndex.segment + 1));
}
int nextMomI = lastIndex.momentum + 1;
while (nextMomI < momentums[lastIndex.segment].Length &&
momentums[lastIndex.segment][nextMomI] != null)
{
Momentum2D.Release(momentums[lastIndex.segment][nextMomI++]);
momentums[lastIndex.segment][nextMomI++] = null;
}
}
void Start()
{
body = GetComponent <Rigidbody2D>();
momentums = new List <Momentum2D[]>(1);
currentIndex = lastIndex = TrailIndex.zero;
Momentum2D[] segment = new Momentum2D[segmentSize];
segment[0] = ExtractMomentum((uint)(Time.fixedTime / Time.fixedDeltaTime));
momentums.Add(segment);
}
public void SendContactEvents(uint tick)
{
Momentum2D momentum = MomentumForTick(tick);
if (CollisionEnterEvent != null && momentum.collisionsEnter != null)
{
foreach (Collision2D collision in momentum.collisionsEnter)
{
CollisionEnterEvent(tick, collision);
}
}
if (CollisionStayEvent != null && momentum.collisionsStay != null)
{
foreach (Collision2D collision in momentum.collisionsStay)
{
CollisionStayEvent(tick, collision);
}
}
if (CollisionExitEvent != null && momentum.collisionsExit != null)
{
foreach (Collision2D collision in momentum.collisionsExit)
{
CollisionExitEvent(tick, collision);
}
}
if (TriggerEnterEvent != null && momentum.triggersEnter != null)
{
foreach (Collider2D collision in momentum.triggersEnter)
{
TriggerEnterEvent(tick, collision);
}
}
if (TriggerStayEvent != null && momentum.triggersStay != null)
{
foreach (Collider2D collision in momentum.triggersStay)
{
TriggerStayEvent(tick, collision);
}
}
if (TriggerExitEvent != null && momentum.triggersExit != null)
{
foreach (Collider2D collision in momentum.triggersExit)
{
TriggerExitEvent(tick, collision);
}
}
}
Momentum2D ExtractMomentum(uint tick)
{
return(Momentum2D.GetMomentum(
tick,
transform.position,
transform.rotation,
body.velocity,
body.angularVelocity,
body.IsSleeping(),
collisionsEnter, collisionsStay, collisionsExit,
triggersEnter, triggersStay, triggersExit
));
}
void ApplyMomentum(Momentum2D momentum)
{
transform.SetPositionAndRotation(
momentum.position,
momentum.rotation
);
body.velocity = momentum.velocity;
body.angularVelocity = momentum.angularVelocity;
if (body.IsSleeping() && !momentum.sleeping)
{
body.WakeUp();
}
else if (body.IsAwake() && momentum.sleeping)
{
body.Sleep();
}
}
public bool GoToTime(uint tick, uint keepTick = 0)
{
TrailIndex i = MomentumIndexForTick(tick);
bool success = GoToIndex(i);
uint pastTick = Math.Max(tick - keepTick, 0);
int pastSegI = 0;
while (pastSegI + 1 <= i.segment &&
momentums[pastSegI + 1][0].tick <= pastTick)
{
pastSegI++;
}
if (pastSegI > 0)
{
currentIndex = new TrailIndex(
currentIndex.segment - pastSegI,
currentIndex.momentum
);
lastIndex = new TrailIndex(
lastIndex.segment - pastSegI,
lastIndex.momentum
);
if (!Momentum2D.IsPoolFull())
{
for (int segI = 0; segI < pastSegI; segI++)
{
Momentum2D.Release(momentums[segI]);
if (Momentum2D.IsPoolFull())
{
break;
}
}
}
momentums.RemoveRange(0, pastSegI);
}
return(success);
}