/// <summary>
/// Compute the current position based on the time and updates.
/// </summary>
/// <param name="timestamp">local time in ticks (milliseconds)</param>
/// <returns></returns>
public virtual Vector3 ComputePosition(long timestamp)
{
long timeDifference = (timestamp - lastLocTimestamp);
if (pathInterpolator != null)
{
PathLocAndDir locAndDir = pathInterpolator.Interpolate(timestamp);
log.DebugFormat("MobNode.ComputePosition: oid {0}, followTerrain {1}, pathInterpolator {2}",
oid, followTerrain, locAndDir == null ? "null" : locAndDir.ToString());
if (locAndDir != null)
{
if (locAndDir.LengthLeft != 0f)
{
SetOrientation(Vector3.UnitZ.GetRotationTo(LastDirection.ToNormalized()));
}
LastDirection = locAndDir.Direction;
lastDirTimestamp = timestamp;
lastLocTimestamp = timestamp;
Vector3 loc = locAndDir.Location;
// If we don't have full pathing support, use
// MoveMobNode so the mob is supported by
// collision volumes.
if (useMoveMobNodeForPathInterpolator && collider != null && collider.PartCount > 0)
{
Vector3 diff = loc - Position;
diff.y = 0;
Vector3 newpos = worldManager.MoveMobNode(this, diff, timeDifference);
lastPosition = newpos;
return(newpos);
}
else
{
loc = worldManager.ResolveLocation(this, loc);
if (collider != null)
{
Vector3 diff = loc - lastPosition;
collider.AddDisplacement(diff);
}
lastPosition = loc;
return(loc);
}
}
else
{
// This interpolator has expired, so get rid of it
pathInterpolator = null;
LastDirection = Vector3.Zero;
}
}
else
{
lastLocTimestamp = timestamp;
}
Vector3 pos = lastPosition + ((timeDifference / 1000.0f) * LastDirection);
Vector3 displacement = pos - Position;
// Move the mob node - - given pathing, this should
// _only_ happen for mobnodes that are other clients'
// players.
pos = worldManager.MoveMobNode(this, displacement, timeDifference);
lastPosition = pos;
return(pos);
}