X + dist * cos(angle+movementspeed * pi/180)*

Y + dist * sin(angle+movementspeed * pi/180)*

* also, reset when the angle hits 359 so you keep it in the same angle all teh time

now... the Z plane, a unit's flying height that is, should have a similar formula shouldn't it? I mean, the first formula can be used in some sort of spherical example I guess, can anyone give me a precise... accurate... splendid... awesomeness formula for moving a unit in the Z plane like a circle.

(Mind you, the easy part is to make the unit go back and forth in the Y plane, I've already done it, I can also make a square-ish form using distance, movement speed etc, all from the great book o' physics)

Me likey maths, teach me