/// <summary>
/// Interpolates the position of the given Unit along the Path given the elapsed flight time.
/// </summary>
/// <param name="elapsedTime">Time that elapsed since the given unit passed by the last PathVertex</param>
internal static void InterpolatePosition(Unit unit, int elapsedTime)
{
var latestNode = unit.LatestTaxiPathNode;
unit.taxiTime += elapsedTime;
if (latestNode.Next == null)
{
// must not happen
unit.CancelTaxiFlight();
return;
}
while (latestNode.Next.Value.TimeFromStart <= unit.taxiTime)
{
// arrived at a node
//if (unit is Character)
//{
// var chr = (Character) unit;
// chr.SendSystemMessage("[{0}] Node: {1} yards ({2} millis)",
// (int)RealmServer.RunTime.TotalMilliseconds,
// latestNode.Next.Value.DistFromStart,
// latestNode.Next.Value.TimeFromStart);
//}
latestNode = latestNode.Next;
unit.LatestTaxiPathNode = latestNode;
if (latestNode.Next == null)
{
// Finished this Path
if (IsNormalSpeed)
{
unit.m_TaxiMovementTimer.Stop();
}
else
{
ContinueFlight(unit);
}
return;
}
}
var prevPathNode = latestNode.Value;
var nextPathNode = latestNode.Next.Value;
// time in millis since we passed the last node
var timeDelta = unit.taxiTime - latestNode.Value.TimeFromStart;
var pos = prevPathNode.Pos +
(((nextPathNode.Pos - prevPathNode.Pos) * timeDelta) / nextPathNode.TimeFromPrevious);
unit.Map.MoveObject(unit, ref pos);
}
/// <summary>
/// Send character down the next leg of a multi-hop trip.
/// </summary>
internal static void ContinueFlight(Unit unit)
{
if (unit.LatestTaxiPathNode == null)
{
//throw new InvalidOperationException("Tried to continue Taxi-flight of Unit which did not start flying.");
return;
}
var latestVertex = unit.LatestTaxiPathNode.Value;
var current = latestVertex.Path.To;
if (unit.m_TaxiMovementTimer.IsRunning &&
!unit.IsInRadius(current.Position, AirSpeed))
{
return;
}
var done = false;
// Are we at the end of the line?
if (unit.TaxiPaths.Count < 2)
{
done = true;
}
else
{
var arrivalPath = unit.TaxiPaths.Dequeue();
if (arrivalPath.To != current)
{
unit.CancelTaxiFlight();
return;
}
var destPath = unit.TaxiPaths.Peek();
if (current != destPath.From)
{
unit.CancelTaxiFlight();
return;
}
}
if (!done)
{
// One stop on a multi-stop ride
FlyUnit(unit, false);
}
else
{
if (IsNormalSpeed)
{
unit.Map.MoveObject(unit, latestVertex.Pos);
}
else
{
// Client doesn't seem to display the movement fast enough
// so we have to speed it up by teleporting
unit.TeleportTo(latestVertex.Pos);
}
unit.CancelTaxiFlight();
}
}
