private Dictionary <Entity, int> CalculateCellsOffsets(GameFieldSize gameSettings)
{
GravityDirection gravityDirection = _helper.Gravity;
CellsMap map = new CellsMap(EntityManager);
Dictionary <Entity, int> offsettedCells = new Dictionary <Entity, int>();
var i = new IntIterator(new IteratorSettings(0, gameSettings.Width - 1, 1));
while (i.MoveNext())
{
var j = new IntIterator(new IteratorSettings(0, gameSettings.Height - 1, -(int)gravityDirection));
while (j.MoveNext())
{
if (map.GetCell(i, j, out var cell))
{
continue;
}
var k = new IntIterator(new IteratorSettings(
j - (int)gravityDirection,
IteratorSettings.GetTo(0, gameSettings.Height - 1, -(int)gravityDirection),
-(int)gravityDirection));
while (k.MoveNext())
{
if (!map.GetCell(i, k, out var affectedCell))
{
continue;
}
if (!offsettedCells.TryGetValue(affectedCell, out var o))
{
offsettedCells[affectedCell] = 0;
}
offsettedCells[affectedCell] += (int)gravityDirection;
}
}
}
return(offsettedCells);
}