[Mechanics] Wall-Sliding off the edge of walls

[Darthfett]

While wall-sliding, the player can keep going, even if there is no wall to slide upon.

Possible fix is to make horizontal collision detection not ignore equal values, and have a special case for collision for equal position and 0 x-velocity.

[Darthfett]

More detail:
Side-colliding while:
Ground-colliding while:
Pushing against wall:
detect horizontal collision, not wall-sliding
Not pushing against wall:
Since x-velocity is 0 and position is equal, horizontal collision should be ignored
Not ground colliding:
Pushing against wall:
Wall-sliding, horizontal collision
Not Pushing against wall:
Since x-velocity is 0, and position is equal, horizontal collision should be ignored