Even easier. use the COS/SIN maths wave for a jump, with gravity :o) I like the bouncing though ^_^
As for climbing stairs, most games FPS wise anyway, would probably use an invisable (entityalpha 0, not hideentity) quad, or smooth mesh over the stairs.
As for climbing stairs, most games FPS wise anyway, would probably use an invisable (entityalpha 0, not hideentity) quad, or smooth mesh over the stairs.