void UpdateEntry(int i)
{
//Compute the current cells occupied by the entry.
var entry = entries.Elements[i];
Int2 min, max;
ComputeCell(ref entry.item.boundingBox.Min, out min);
ComputeCell(ref entry.item.boundingBox.Max, out max);
//For any cell that used to be occupied (defined by the previous min/max),
//remove the entry.
for (int j = entry.previousMin.Y; j <= entry.previousMax.Y; j++)
{
for (int k = entry.previousMin.Z; k <= entry.previousMax.Z; k++)
{
if (j >= min.Y && j <= max.Y && k >= min.Z && k <= max.Z)
continue; //This cell is currently occupied, do not remove.
var index = new Int2 {Y = j, Z = k};
cellSetLocker.Enter();
cellSet.Remove(ref index, entry);
cellSetLocker.Exit();
}
}
//For any cell that is newly occupied (was not previously contained),
//add the entry.
for (int j = min.Y; j <= max.Y; j++)
{
for (int k = min.Z; k <= max.Z; k++)
{
if (j >= entry.previousMin.Y && j <= entry.previousMax.Y && k >= entry.previousMin.Z && k <= entry.previousMax.Z)
continue; //This cell is already occupied, do not add.
var index = new Int2 {Y = j, Z = k};
cellSetLocker.Enter();
cellSet.Add(ref index, entry);
cellSetLocker.Exit();
}
}
entry.previousMin = min;
entry.previousMax = max;
}
