Directional terrain

[justinrpurdy]

It would be amazing if this module could support directional difficult terrain. A few example use cases:

• You might want it to cost 20 feet of movement speed going from left to right where someone would climb a 10ft cliff face, but only 5 feet going right to left because they're just jumping down.
• You might want going up stairs to be difficult terrain, but not going down stairs.
• You might want to have the space just inside a window cost 10 feet for creatures climbing through the window, but only 5 feet for creatures inside the room moving past the window.

[MajorVictory]

I think a method to implement this could be a special tile that is two halves, where each half has a separate modifier. Then allow the tile to be rotated according to grid (two rotation states on squares, three states on hexes).

[justinrpurdy]

Another possibility might be to track the direction from which a token moved onto the terrain square. I'm picturing the configuration for this is a multi-selectable 3x3 grid of checkboxes to indicate from which directions a square is considered difficult terrain, and clicking each box multiple times cycles through the configured movement cost multipliers. Could also be done with dropdowns. That would allow for scenarios like:

• stairs that are only difficult terrain going up, but not down or across
• a conveyor belt or river on which moving objects have a 4x movement cost multiplier going upstream, 2x ~modifier~ multiplier going across, and even a 0.5x multiplier going downstream if that's possible