public Timepoint AddPoint(int time, ISnapshotArgs snapshot)
{
if (points.Last != null)
{
if (time < points.Last.Value.Time)
{
throw new ArgumentException(string.Format("'time' must > {0}", points.Last.Value.Time));
}
if (time == points.Last.Value.Time)
{
points.Last.Value.Snapshot = snapshot;
return(points.Last.Value);
}
}
var point = new Timepoint(this, time, snapshot);
points.AddLast(point);
return(point);
}
public Timepoint InterpolatePoint(int time)
{
Timepoint previous = null;
Timepoint next = null;
// Search in reversed order for better performance
for (var point = points.Last; point != null; point = point.Previous)
{
if (point.Value.Time > time)
{
next = point.Value;
}
else if (point.Value.Time == time)
{
previous = next = point.Value;
break;
}
else
{
previous = point.Value;
break;
}
}
ISnapshotArgs snapshot;
if (previous != null)
{
if (next != null)
{
if (previous == next)
{
snapshot = previous.Snapshot.Clone();
}
else
{
var deltaTime = time - previous.Time;
var totalTime = next.Time - previous.Time;
var factor = 1f * deltaTime / totalTime;
snapshot = previous.Snapshot.Interpolate(next.Snapshot, factor);
}
}
else
{
var deltaTime = time - previous.Time;
snapshot = previous.Snapshot.Extrapolate(deltaTime);
}
}
else
{
if (next != null)
{
var deltaTime = time - next.Time;
snapshot = next.Snapshot.Extrapolate(deltaTime);
}
else
{
return(null);
}
}
if (snapshot != null)
{
return(new Timepoint(this, time, snapshot));
}
else
{
return(null);
}
}