public override void InitializeVisibility()
{
ObjectsSortedByStart = StaticObjectStates.Select((x, i) => new { Index = i, Distance = x.StartingDistance }).OrderBy(x => x.Distance).Select(x => x.Index).ToArray();
ObjectsSortedByEnd = StaticObjectStates.Select((x, i) => new { Index = i, Distance = x.EndingDistance }).OrderBy(x => x.Distance).Select(x => x.Index).ToArray();
ObjectsSortedByStartPointer = 0;
ObjectsSortedByEndPointer = 0;
double p = CameraTrackFollower.TrackPosition + Camera.Alignment.Position.Z;
foreach (ObjectState state in StaticObjectStates.Where(recipe => recipe.StartingDistance <= p + Camera.ForwardViewingDistance & recipe.EndingDistance >= p - Camera.BackwardViewingDistance))
{
VisibleObjects.ShowObject(state, ObjectType.Static);
}
}
public override void UpdateVisibility(double TrackPosition)
{
double d = TrackPosition - LastUpdatedTrackPosition;
int n = ObjectsSortedByStart.Length;
double p = CameraTrackFollower.TrackPosition + Camera.Alignment.Position.Z;
if (d < 0.0)
{
if (ObjectsSortedByStartPointer >= n)
{
ObjectsSortedByStartPointer = n - 1;
}
if (ObjectsSortedByEndPointer >= n)
{
ObjectsSortedByEndPointer = n - 1;
}
// dispose
while (ObjectsSortedByStartPointer >= 0)
{
int o = ObjectsSortedByStart[ObjectsSortedByStartPointer];
if (StaticObjectStates[o].StartingDistance > p + Camera.ForwardViewingDistance)
{
VisibleObjects.HideObject(StaticObjectStates[o]);
ObjectsSortedByStartPointer--;
}
else
{
break;
}
}
// introduce
while (ObjectsSortedByEndPointer >= 0)
{
int o = ObjectsSortedByEnd[ObjectsSortedByEndPointer];
if (StaticObjectStates[o].EndingDistance >= p - Camera.BackwardViewingDistance)
{
if (StaticObjectStates[o].StartingDistance <= p + Camera.ForwardViewingDistance)
{
VisibleObjects.ShowObject(StaticObjectStates[o], ObjectType.Static);
}
ObjectsSortedByEndPointer--;
}
else
{
break;
}
}
}
else if (d > 0.0)
{
if (ObjectsSortedByStartPointer < 0)
{
ObjectsSortedByStartPointer = 0;
}
if (ObjectsSortedByEndPointer < 0)
{
ObjectsSortedByEndPointer = 0;
}
// dispose
while (ObjectsSortedByEndPointer < n)
{
int o = ObjectsSortedByEnd[ObjectsSortedByEndPointer];
if (StaticObjectStates[o].EndingDistance < p - Camera.BackwardViewingDistance)
{
VisibleObjects.HideObject(StaticObjectStates[o]);
ObjectsSortedByEndPointer++;
}
else
{
break;
}
}
// introduce
while (ObjectsSortedByStartPointer < n)
{
int o = ObjectsSortedByStart[ObjectsSortedByStartPointer];
if (StaticObjectStates[o].StartingDistance <= p + Camera.ForwardViewingDistance)
{
if (StaticObjectStates[o].EndingDistance >= p - Camera.BackwardViewingDistance)
{
VisibleObjects.ShowObject(StaticObjectStates[o], ObjectType.Static);
}
ObjectsSortedByStartPointer++;
}
else
{
break;
}
}
}
LastUpdatedTrackPosition = TrackPosition;
}