public GridNode MarkNode()
{
Vector3 world_pos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
Vector3 local_pos = transform.InverseTransformPoint(world_pos);
// This trick makes a lot of assumptions that the nodes haven't been modified since initialization.
int column = Mathf.FloorToInt(local_pos.x / _node_width);
int row = Mathf.FloorToInt(-local_pos.y / _node_height);
if (row >= 0 && row < _nodes.GetLength(0) &&
column >= 0 && column < _nodes.GetLength(1))
{
GridNode node = _nodes[row, column];
if (node.GetPos() != BoardPosition.Empty)
{
return(null);
}
node.SetPos(BoardPosition.Green);
return(node);
}
return(null);
}
public void UpdateBoard(GridNode n)
{
nodes[n.row, n.column].pos = n.GetPos();
}