private void PlaceWallNear(Vector2 point)
{
int[] gridCoord = grid.GetGridPos(point);
Vector2 worldPos = grid.GetWorldPos(gridCoord);
if (!grid.IsWall(gridCoord))
{
GameObject w = GameObject.Instantiate(wall);
w.transform.position = worldPos;
w.transform.localScale = new Vector3(cell_size, cell_size, 1f);
w.transform.SetParent(map.transform);
grid.CreateWall(gridCoord);
}
}