private static unsafe NativeList <MapNode> GetPassableNeighbours(int2 currentNode,
NativeArray2D <MapNode> gridCopy, MapNode *currentNodePtr)
{
NativeList <MapNode> neighbours = new NativeList <MapNode>(8, Allocator.Temp);
//Find all neighbours on the grid by checking if all surrounding nodes are within grid bounds and are valid nodes to traverse to.
for (int x = -1; x <= 1; ++x)
{
int xIndex = currentNode.x + x;
if (!gridCopy.CheckXBounds(xIndex))
{
continue;
}
for (int y = -1; y <= 1; ++y)
{
if (x == 0 && y == 0)
{
continue;
}
int yIndex = currentNode.y + y;
if (!gridCopy.CheckYBounds(yIndex))
{
continue;
}
MapNode neighbour = gridCopy[xIndex, yIndex];
if (neighbour.occupiedBy != OccupiedBy.Nothing || neighbour.state == NodeState.Closed)
{
continue;
}
TestNeighbour(gridCopy, ref neighbour, currentNodePtr, neighbours);
}
}
return(neighbours);
}