private List <Node> GetNeighbours(Node currentNode)
{
List <Node> neighbourList = new List <Node>();
if (grid.IsValidNeighbour(currentNode.x - 1, currentNode.y, out Node leftNeighbour))
{
neighbourList.Add(leftNeighbour);
}
if (grid.IsValidNeighbour(currentNode.x, currentNode.y + 1, out Node upNeighbour))
{
neighbourList.Add(upNeighbour);
}
if (grid.IsValidNeighbour(currentNode.x + 1, currentNode.y, out Node rightNeighbour))
{
neighbourList.Add(rightNeighbour);
}
if (grid.IsValidNeighbour(currentNode.x, currentNode.y - 1, out Node downNeighbour))
{
neighbourList.Add(downNeighbour);
}
if (grid.IsValidNeighbour(currentNode.x - 1, currentNode.y - 1, out Node downLeftNeighbour))
{
neighbourList.Add(downLeftNeighbour);
}
if (grid.IsValidNeighbour(currentNode.x - 1, currentNode.y + 1, out Node upLeftNeighbour))
{
neighbourList.Add(upLeftNeighbour);
}
if (grid.IsValidNeighbour(currentNode.x + 1, currentNode.y + 1, out Node upRightNeighbour))
{
neighbourList.Add(upRightNeighbour);
}
if (grid.IsValidNeighbour(currentNode.x + 1, currentNode.y - 1, out Node downRightNeighbour))
{
neighbourList.Add(downRightNeighbour);
}
return(neighbourList);
}