oview() but only list north south east and west

ID:2252140
 
May 28 2017, 9:17 pm
(See the best response by Kaiochao.)
im trying to make a proc like oview(), but instead the proc returns objects that are either in front, behind, to the left, to the right, of them. no diagonals. i have no idea on how to make this happen
May 28 2017, 9:37 pm
Best response
The obvious, naive/unoptimized approach would be to simply "filter" the resulting list from oview() to only include the objects you want.
// get a list of objects to start with
var list/objects = oview(src)

// consider each object in the list
for(var/object in objects)

  // get the dir from src to the object
  var dir_to = get_dir(src, object)

  // this is the conventional way of checking if a dir is diagonal (not cardinal)
  if(dir_to & dir_to - 1)

    // since the dir to the object is a diagonal, remove it from the list
    objects -= object

// now objects only contains objects at a cardinal direction