Rotation angle problem

Raduprv · 2003-01-17T15:12:17

I never asked such a stupid question, but this one is killing me, I just have a mind block, my brain ''resets'' whenever I am thinking of it. Anyway, here is my problem: My characters can move in 8 directions: N,NE,E, etc. Each direction has a 45 degree angle. That is, N is 0, E is 90, S is 180, etc. Now, if my character is facing N, and I want to move to SE, then the angle the char. has to rotate would be 45*3=135 But, if it faces N and I want it to move SW, then the angle would be -135 (I want the characters to turn around CW, or CCW, depending on which s the smallest angle). Now, what is the formula to do this? It is killing me, any help would be greatly appreciated.