public static void ApplyChange(
eCellType[] fieldMatrix,
Position head,
Position tail,
eDirectionType currentDirection,
eDirectionType nextDirection,
out bool expanded)
{
expanded = false;
if (nextDirection == eDirectionType.None)
{
return;
}
eCellType nextDirectionCellType = eCellType.None;
Lookups.DirectionTypeToCellType(nextDirection, ref nextDirectionCellType);
Position nextHeadPosition = new Position();
Lookups.ApplyDirection(head, nextHeadPosition, nextDirection);
ThrowIfCrashed(fieldMatrix, nextHeadPosition);
eCellType tailCellType, nextHeadCellType;
FieldMatrix.GetCellTypeByPosition(fieldMatrix, tail, out tailCellType);
FieldMatrix.GetCellTypeByPosition(fieldMatrix, nextHeadPosition, out nextHeadCellType);
// move head
FieldMatrix.SetCellTypeByPosition(fieldMatrix, head, nextDirectionCellType);
FieldMatrix.SetCellTypeByPosition(fieldMatrix, nextHeadPosition, eCellType.SnakeHead);
FPGA.Runtime.DeepCopy(head, nextHeadPosition);
if (nextHeadCellType == eCellType.NextPart)
{
expanded = true;
return;
}
// move tail
eDirectionType tailDirection = eDirectionType.None;
// get value at current tail
Lookups.CellTypeToDirectionType(tailCellType, ref tailDirection);
// clear current tail
FieldMatrix.SetCellTypeByPosition(fieldMatrix, tail, eCellType.None);
// move tail
Lookups.ApplyDirection(tail, tail, tailDirection);
}
public static void Seed(
eCellType[] fieldMatrix,
Position head,
Position tail)
{
Reset(fieldMatrix);
tail.row = 3;
tail.col = 2;
FPGA.Runtime.DeepCopy(head, tail);
const byte seedSnakeLength = 3;
for (byte i = 0; i < seedSnakeLength - 1; i++)
{
SetCellTypeByPosition(fieldMatrix, head, eCellType.SnakeRight);
Lookups.ApplyDirection(head, head, eDirectionType.Right);
}
SetCellTypeByPosition(fieldMatrix, head, eCellType.SnakeHead);
}
