private Vector2Int?ComputeValidDrive()
{
// Have we moved at all?
if (lastDelta != Vector2Int.zero)
{
// Can we keep moving forward?
if (movementController.CanDoMove(movementController.gridElement.position, lastDelta))
{
return(lastDelta);
}
// Nope. What about backward?
if (movementController.CanDoMove(movementController.gridElement.position, -lastDelta))
{
return(-lastDelta);
}
}
// Bummer. Let's find first unoccupied spot.
for (int x = -1; x <= 1; x++)
{
for (int y = -1; y <= 1; y++)
{
if (x == 0 && y == 0)
{
continue;
}
// Can we move to that spot?
if (movementController.CanDoMove(movementController.gridElement.position, new Vector2Int(x, y)))
{
return(new Vector2Int(x, y));
}
}
}
// Can't move anywhere... Can't build right now.
return(null);
}
private static List <Vector2Int> AvailableNeighbors(MovementController movingElement, Vector2Int point)
{
List <Vector2Int> neighbors = new List <Vector2Int>();
for (int x = -1; x <= 1; x++)
{
for (int y = -1; y <= 1; y++)
{
if (x == 0 && y == 0)
{
continue;
}
Vector2Int drive = new Vector2Int(x, y);
if (movingElement.CanDoMove(point, drive))
{
neighbors.Add(point + drive);
}
}
}
return(neighbors);
}