void CheckAboveBelowBuildingPositions(GridIndex index, ref List <GridIndex> indexList)
{
if (index == null)
{
throw new ArgumentNullException("index");
}
if (indexList == null)
{
throw new ArgumentNullException("indexList");
}
// Only checking the front plane for this (Z = 0)
if (index.Y != Constants.GridSurfaceY - 1)
{
GridIndex IndexAbove = index.GetAbove();
if (IndexAbove.IsValid() && (_GridData[IndexAbove.X, IndexAbove.Y, 0].Occupied == false))
{
if (indexList.Contains(IndexAbove) == false)
{
indexList.Add(IndexAbove);
}
}
}
if (index.Y != Constants.GridSurfaceY)
{
GridIndex IndexBelow = index.GetBelow();
if (IndexBelow.IsValid() && (_GridData[IndexBelow.X, IndexBelow.Y, 0].Occupied == false))
{
if (indexList.Contains(IndexBelow) == false)
{
indexList.Add(IndexBelow);
}
}
}
}
