A math problem.

[keless]

Given two arbitrary angles (between 0 and 360) how do you determine whether the shortest distance is clockwise or counter-clockwise?

Comments

[skyesurfer]

*Tilts head* from your phrasing, I'm not entirely sure I understand your question. But based on my interpretation of it:

If you are facing angle1 and need to turn to angle2, then assuming the angle increases as you go clockwise... [Pardon my half-assed pseudo-code]

if (angle1 > angle2){
if angle1 - angle2 < 180, turn counterclockwise
else clockwise
}

if (angle2 > angle1){
if angle2 - angle1 > 180, turn counterclockwise
else clockwise
}

There's probably a way to simplify that but I'm lazy, and I'm sure you get the gist lol.

[keless]

That works. I also ended up with another result that uses less "if" statements:

float delta = A2 - A1;
if( delta > 180.0f ) {
//clockwise
delta = 360.0f - delta;
}else {
//counter clockwise
}

[skyesurfer]

http://www.youtube.com/watch?v=kZUPCB9533Y&NR=1

[keless]

http://games.adultswim.com/robot-unicorn-attack-twitchy-online-game.html

[skyesurfer]

.....you always find the best stuff. XD

[keless]

I'm working on a project where I convert japanese flash games that only require 1 button to play into iphone games.

There are two crane machine-type games.