Rotation Equation - Printable Version +- iDevGames Forums ( http://www.idevgames.com/forums)+-- Forum: Development Zone ( /forum-3.html)+--- Forum: Game Programming Fundamentals ( /forum-7.html)+--- Thread: Rotation Equation ( /thread-2139.html) |

Rotation Equation - merrill541 - Nov 17, 2008 04:01 PM
Does anyone know of a general fast and simple 2D rotation equation in the form of where you input a point (x,y), it's axis (x2,y2) and the amount of rotation you want to be applied and it returns the new rotated point. Rotation Equation - Najdorf - Nov 17, 2008 04:34 PM
Constructively (x3,y3)=(x2,y2)+cos(a)*(dx,dy)+(-dy,dx)*sin(a) where a is the angle, dx=x-x2, dy=y-y2. |