figure 1: a "v" pattern followed by the more desired "y" pattern.
After working with the two main heuristics, it was unclear whether or not I-walkways would benefit from an "aesthetic" heuristic. One suggestion by Galle and Kovacs was to turn all the V patterns into Y patterns (see figure 1).
|
|
|
figure 1: a "v" pattern followed by the more desired "y" pattern. |
But as it turns out, with the cost heuristic on, a V branch would be more expensive to build compared to a Y branch (see figure 2)
|
|
|
figure 2: the cost heuristic tells us that there is good reason to prefer the "y" pattern over the "v" pattern (since the center node is not the costly blue) |
Instead of being a complex aesthetical preference, perhaps people might prefer the "y" patterns simply because they cost less. But the cost heuristic alone, though, would fail to detect V nodes if there were other neighbors attatched to the vertex in question which would balance the cost out (see figure 3). But in this case, it is unclear if we would even want to move the center node further up since it would disrupt all of the other side nodes.
|
|
|
figure 3: a fooled cost heuristic that can't spot the v since new nodes balance out the center node |
