/// <summary>
/// Checks if the interest groups have changed and perform action if necessary.
/// </summary>
private void CheckGroupsChanged()
{
if (cullArea.NumberOfSubdivisions == 0)
{
return;
}
previousActiveCells = new List <int>(activeCells);
activeCells = cullArea.GetActiveCells(transform.position);
if (activeCells.Count != previousActiveCells.Count)
{
UpdateInterestGroups();
return;
}
foreach (int groupId in activeCells)
{
if (!previousActiveCells.Contains(groupId))
{
UpdateInterestGroups();
return;
}
}
}
/// <summary>
/// Checks if the previously active cells have changed.
/// </summary>
/// <returns>True if the previously active cells have changed and false otherwise.</returns>
private bool HaveActiveCellsChanged()
{
if (cullArea.NumberOfSubdivisions == 0)
{
return(false);
}
previousActiveCells = new List <int>(activeCells);
activeCells = cullArea.GetActiveCells(transform.position);
// If the player leaves the area we insert the whole area itself as an active cell.
// This can be removed if it is sure that the player is not able to leave the area.
while (activeCells.Count <= cullArea.NumberOfSubdivisions)
{
activeCells.Add(cullArea.FIRST_GROUP_ID);
}
if (activeCells.Count != previousActiveCells.Count)
{
return(true);
}
if (activeCells[cullArea.NumberOfSubdivisions] != previousActiveCells[cullArea.NumberOfSubdivisions])
{
return(true);
}
return(false);
}