is that you can emplace two portals on flat surfaces... what goes in one, comes out the other. Momentum is maintained through portals; if the two portals don't face "opposite ways" then the momentum is also transformed in a fairly obvious way. This lets you
mildly SPOILY SPOILY SPOILY SPOILY
convert height into distance (one portal in the floor, one on a wall higher up), constantly "bob" up and down (two portals on a flat floor), or free fall forever as Dust Puppy is doing (one in the floor, one in the ceiling, aligned -- and make sure to null out your velocity if you don't want to splat a few seconds in ;). It also lets you pull some really interesting bank-shots with those energy guns. |
