/// <summary>
/// If conditions have changed to allow finalizing creation of any pending attachment points,
/// do it now.
/// </summary>
private void ProcessPendingAttachmentPoints()
{
if (CurrentFragmentId.IsKnown() && pendingAttachments.Count > 0)
{
// We have a valid destination fragment. Note that since this queue is in order of submission,
// if an attachment point depends on a second attachment point for context,
// that second will be either earlier in the list (because there was no valid current fragment when it was
// created) or it will have a valid fragment. So by the time we get to the one with a dependency (pending.context != null),
// its dependency will have a valid fragment id.
int pendingCount = pendingAttachments.Count;
for (int i = 0; i < pendingCount; ++i)
{
AttachmentPoint target = pendingAttachments[i].target;
Vector3 frozenPosition = pendingAttachments[i].target.ObjectPosition;
IAttachmentPoint context = pendingAttachments[i].context;
SetupAttachmentPoint(plugin, target, context);
FragmentId fragmentId = CurrentFragmentId;
if (context != null)
{
fragmentId = context.FragmentId;
}
Debug.Assert(fragmentId.IsKnown(), $"FragmentId {fragmentId.FormatStr()} invalid from {(context != null ? "context" : "head")} in processing pending");
Fragment fragment = EnsureFragment(fragmentId);
Debug.Assert(fragment != null, "Valid fragmentId but no fragment found");
fragment.AddAttachmentPoint(target);
}
// All pending must now be in a good home fragment, clear the to-do list.
pendingAttachments.Clear();
}
}
/// <summary>
/// Teleport (as opposed to Move) means that the object is meant to have disappeared at its old position
/// and instantaneously reappeared at its new position in frozen space without traversing the space in between.
/// </summary>
/// <remarks>
/// This is equivalent to releasing the existing attachment point and creating a new one,
/// except in that the attachment point reference remains valid.
/// See <see cref="WorldLockingManager.TeleportAttachmentPoint"/>.
/// </remarks>
/// <param name="attachPointIface">The attachment point to teleport</param>
/// <param name="newFrozenPosition">The position to teleport to.</param>
/// <param name="context">The optional context.</param>
public void TeleportAttachmentPoint(IAttachmentPoint attachPointIface, Vector3 newFrozenPosition, IAttachmentPoint context)
{
AttachmentPoint attachPoint = attachPointIface as AttachmentPoint;
if (attachPoint != null)
{
attachPoint.ObjectPosition = newFrozenPosition;
// Save the fragment it's currently in, in case it changes here.
FragmentId oldFragmentId = attachPoint.FragmentId;
// If it's not in a valid fragment, it is still pending and will get processed when the system is ready.
if (oldFragmentId.IsKnown())
{
FragmentId newFragmentId = GetTargetFragmentId(context);
// If there is a valid current fragment,
if (newFragmentId.IsKnown())
{
// Fill it in with a new one.
SetupAttachmentPoint(plugin, attachPoint, context);
if (attachPoint.FragmentId != oldFragmentId)
{
ChangeAttachmentPointFragment(oldFragmentId, attachPoint);
}
}
else
{
AddPendingAttachmentPoint(attachPoint, context);
}
}
}
}
/// <summary>
/// Add a new attachment point to the pending list to be processed when the system is ready.
/// </summary>
/// <param name="attachPoint">Attachment point to process later.</param>
/// <param name="context">Optional spawning attachment point, may be null.</param>
private void AddPendingAttachmentPoint(AttachmentPoint attachPoint, IAttachmentPoint context)
{
// Flag as being in an invalid state
attachPoint.HandleStateChange(AttachmentPointStateType.Pending);
pendingAttachments.Add(
new PendingAttachmentPoint
{
target = attachPoint,
context = context
}
);
}
/// <summary>
/// Add an existing attachment point to this fragment.
/// </summary>
/// <remarks>
/// The attachment point might currently belong to another fragment, if
/// it is being moved from the other to this.
/// Since this is only used internally, it operates directly on an AttachmentPoint
/// rather than an interface to avoid an unnecessary downcast.
/// </remarks>
/// <param name="attachPoint"></param>
public void AddAttachmentPoint(AttachmentPoint attachPoint)
{
if (attachPoint != null)
{
if (attachPoint.StateHandler != null)
{
updateStateAllAttachments += attachPoint.StateHandler;
}
attachPoint.HandleStateChange(State);
attachmentList.Add(attachPoint);
}
}
/// <summary>
/// Helper to move an attachment point from one fragment to another.
/// </summary>
/// <remarks>
/// Assumes that the attachment point's FragmentId property has already been set to the new fragment.
/// </remarks>
/// <param name="oldFragmentId">Source fragment</param>
/// <param name="attachPoint">The attachment point</param>
private void ChangeAttachmentPointFragment(FragmentId oldFragmentId, AttachmentPoint attachPoint)
{
Debug.Assert(oldFragmentId != attachPoint.FragmentId, "Moving attachment point from and to same fragment");
Fragment oldFragment = EnsureFragment(oldFragmentId);
Fragment newFragment = EnsureFragment(attachPoint.FragmentId);
Debug.Assert(oldFragment != null, "Valid fragmentId's but null source fragment");
Debug.Assert(newFragment != null, "Valid fragmentId's but null destination fragment");
// Add to the new fragment
newFragment.AddAttachmentPoint(attachPoint);
// Remove from the old fragment
oldFragment.ReleaseAttachmentPoint(attachPoint);
}
/// <summary>
/// Absorb the contents of another fragment, emptying it.
/// </summary>
/// <param name="other">The fragment to lose all its contents to this.</param>
public void AbsorbOtherFragment(Fragment other)
{
Debug.Assert(other != this, $"Trying to merge to and from the same fragment {FragmentId}");
int otherCount = other.attachmentList.Count;
for (int i = 0; i < otherCount; ++i)
{
AttachmentPoint att = other.attachmentList[i];
att.Set(FragmentId, att.CachedPosition, att.AnchorId, att.LocationFromAnchor);
if (att.StateHandler != null)
{
updateStateAllAttachments += att.StateHandler;
}
att.HandleStateChange(State);
attachmentList.Add(att);
}
other.ReleaseAll();
}
/// <summary>
/// Notify system attachment point is no longer needed. See <see cref="IAttachmentPointManager.ReleaseAttachmentPoint"/>
/// </summary>
/// <param name="attachmentPoint"></param>
public void ReleaseAttachmentPoint(IAttachmentPoint attachmentPoint)
{
AttachmentPoint attachPoint = attachmentPoint as AttachmentPoint;
if (attachPoint != null)
{
if (attachPoint.StateHandler != null)
{
updateStateAllAttachments -= attachPoint.StateHandler;
}
attachPoint.HandleStateChange(AttachmentPointStateType.Released);
attachmentList.Remove(attachPoint);
}
else
{
Debug.LogError("On release, IAttachmentPoint isn't AttachmentPoint");
}
}
/// <summary>
/// Create and register a new attachment point.
/// </summary>
/// <remarks>
/// The attachment point itself is a fairly opaque handle. Its effects are propagated to the client via the
/// two handlers associated with it.
/// The optional context attachment point provides an optional contextual hint to where in the anchor
/// graph to bind the new attachment point.
/// See <see cref="IAttachmentPointManager.CreateAttachmentPoint"/>.
/// </remarks>
/// <param name="frozenPosition">The position in the frozen space at which to start the attachment point</param>
/// <param name="context">The optional context into which to create the attachment point (may be null)</param>
/// <param name="locationHandler">Delegate to handle WorldLocking system adjustments to position</param>
/// <param name="stateHandler">Delegate to handle WorldLocking connectivity changes</param>
/// <returns>The new attachment point interface.</returns>
public IAttachmentPoint CreateAttachmentPoint(Vector3 frozenPosition, IAttachmentPoint context,
AdjustLocationDelegate locationHandler, AdjustStateDelegate stateHandler)
{
FragmentId fragmentId = GetTargetFragmentId(context);
AttachmentPoint attachPoint = new AttachmentPoint(locationHandler, stateHandler);
attachPoint.ObjectPosition = frozenPosition;
if (fragmentId.IsKnown())
{
SetupAttachmentPoint(plugin, attachPoint, context);
Fragment fragment = EnsureFragment(fragmentId);
Debug.Assert(fragment != null, "Valid fragmentId but no fragment found");
fragment.AddAttachmentPoint(attachPoint);
}
else
{
AddPendingAttachmentPoint(attachPoint, context);
}
return(attachPoint);
}
/// <summary>
/// Release an attachment point for disposal. The attachment point is no longer valid after this call.
/// </summary>
/// <remarks>
/// In the unlikely circumstance that another attachment point has been spawned from this one
/// but has not yet been processed (is still in the pending queue),
/// that relationship is broken on release of this one, and when the other attachment point is
/// finally processed, it will be as if it was created with a null context.
/// </remarks>
/// <param name="attachPointIface">The attachment point to release.</param>
public void ReleaseAttachmentPoint(IAttachmentPoint attachPointIface)
{
AttachmentPoint attachPoint = attachPointIface as AttachmentPoint;
if (attachPoint != null)
{
Fragment fragment = EnsureFragment(attachPoint.FragmentId);
if (fragment != null)
{
// Fragment handles notification.
fragment.ReleaseAttachmentPoint(attachPoint);
}
else
{
// Notify of the state change to released.
attachPoint.HandleStateChange(AttachmentPointStateType.Released);
// The list of pending attachments is expected to be small, and release of an attachment
// point while there are pending attachments is expected to be rare. So brute force it here.
// If the attachment point being released is a target in the pending list, remove it.
// If it is the context of another pending target, set that context to null.
// Proceed through the list in reverse order, because context fixes will only be found
// later in the list than the original, and once the original is found we are done.
int pendingCount = pendingAttachments.Count;
for (int i = pendingCount - 1; i >= 0; --i)
{
if (pendingAttachments[i].context == attachPoint)
{
var p = pendingAttachments[i];
p.context = null;
pendingAttachments[i] = p;
}
else if (pendingAttachments[i].target == attachPoint)
{
pendingAttachments.RemoveAt(i);
break;
}
}
}
}
}
/// <summary>
/// Helper function for setting up the internals of an AttachmentPoint
/// </summary>
/// <param name="plugin">The global plugin</param>
/// <param name="target">The attachment point to setup</param>
/// <param name="context">The optional context <see cref="CreateAttachmentPoint"/></param>
public static void SetupAttachmentPoint(IPlugin plugin, AttachmentPoint target, IAttachmentPoint context)
{
if (context != null)
{
AnchorId anchorId;
Vector3 locationFromAnchor;
plugin.CreateAttachmentPointFromSpawner(context.AnchorId, context.LocationFromAnchor, target.ObjectPosition,
out anchorId, out locationFromAnchor);
FragmentId fragmentId = context.FragmentId;
target.Set(fragmentId, target.ObjectPosition, anchorId, locationFromAnchor);
}
else
{
FragmentId currentFragmentId = plugin.GetMostSignificantFragmentId();
AnchorId anchorId;
Vector3 locationFromAnchor;
plugin.CreateAttachmentPointFromHead(target.ObjectPosition,
out anchorId, out locationFromAnchor);
FragmentId fragmentId = currentFragmentId;
target.Set(fragmentId, target.ObjectPosition, anchorId, locationFromAnchor);
}
}
/// <summary>
/// Move (as opposed to Teleport) means that the object is meant to have traversed
/// flozen space from its old position to the given new position on some continuous path.
/// </summary>
/// <remarks>
/// Not to be used for automatic (i.e. FrozenWorld Engine instigated) moves.
/// See <see cref="WorldLockingManager.MoveAttachmentPoint"/>
/// </remarks>
/// <param name="attachPoint">Attachment point to move</param>
/// <param name="newFrozenPosition">The new position in frozen space</param>
public void MoveAttachmentPoint(IAttachmentPoint attachPointIface, Vector3 newFrozenPosition)
{
AttachmentPoint attachPoint = attachPointIface as AttachmentPoint;
if (attachPoint != null)
{
attachPoint.ObjectPosition = newFrozenPosition;
// If it's not in a valid fragment, it is still pending and will get processed when the system is ready.
if (attachPoint.FragmentId.IsKnown())
{
float minDistToUpdateSq = 0.5f * 0.5f;
float moveDistanceSq = (newFrozenPosition - attachPoint.CachedPosition).sqrMagnitude;
if (moveDistanceSq > minDistToUpdateSq)
{
attachPoint.LocationFromAnchor = plugin.MoveAttachmentPoint(newFrozenPosition, attachPoint.AnchorId, attachPoint.LocationFromAnchor);
attachPoint.CachedPosition = newFrozenPosition;
}
// Else we haven't moved enough to bother doing anything.
}
}
}
/// <summary>
/// Run through all attachment points, get their adjustments from the plugin and apply them.
/// </summary>
/// <remarks>
/// This must be called between plugin.Refreeze() and plugin.RefreezeFinish().
/// </remarks>
public void AdjustAll(IPlugin plugin)
{
int count = attachmentList.Count;
for (int i = 0; i < count; ++i)
{
AttachmentPoint attach = attachmentList[i];
AnchorId newAnchorId;
Vector3 newLocationFromAnchor;
Pose adjustment;
if (plugin.ComputeAttachmentPointAdjustment(attach.AnchorId, attach.LocationFromAnchor,
out newAnchorId, out newLocationFromAnchor, out adjustment))
{
attach.Set(FragmentId, attach.CachedPosition, newAnchorId, newLocationFromAnchor);
attach.HandlePoseAdjustment(adjustment);
}
else
{
Debug.Log($"No adjustment during refreeze for {attach.AnchorId.ToString()}");
}
}
}