   Create a circle at a specified point
  I can't remember for sure the correct math, but I did this awhile ago when I was making some planets and a solar system and used some equation to determine the circular path around a planet for a moon.x = a + r cos(angle)y = b + r sin(angle)pos is the origin of the player or planet and I need to move the circle out from that point by some radial amount?ThanksP.S. Is there some math term that refers to this equation? So I can remember it for future reference?[Edited by - MARS_999 on June 11, 2009 11:48:23 AM]
  Always remember that Wikipedia is your friend even more than google is. [grin]May I suggest that you start looking for elipses as well since planets (and moons for that matter) do not follow circular pathes. You can even go straight for it and do googling or wikipedia'ing for Keplers laws of planet movement.   ;Quote:Original post by WaterwalkerAlways remember that Wikipedia is your friend even more than google is. [grin]May I suggest that you start looking for elipses as well since planets (and moons for that matter) do not follow circular pathes. You can even go straight for it and do googling or wikipedia'ing for Keplers laws of planet movement.Yeah thanks, the name is parametric form from the look of it. But IIRC you need to add to the equation something if you want to move the circle off center?   ;  Sure. This parametric equation describes the circle points with respect to the circle center. Just add the corresponding circle center x and y coordinates to the equation and you got it.   