DC Analog stick in degrees?

[GyroVorbis]

I'm working on a particle demo that can create particles at 0-360 degrees.

I'm using cond.joyx and cond.joyy to get the state of the analog stick. I wanted to somehow treat the analog stick like a 360 degree circle.

Tvspelsfreak had the bright idea of using inverse tangent (tan^-1), but it looks like that isn't going to work).

I was doing this:

Code: Select all

Part_Attribs.s_angle = atan(Buttons.joyx/Buttons.joyy) * (180/3.1415927);

I used the atan function in <math.h> to calculate radians, then converted the radians to degrees by multiplying radians by 180 over pi.

It sorta almost worked, but not correctly.

Any ideas?

[quarn]

Try atan2(x,y) instead, regular atan does not determine the quadrant and thus only covers half the angles.

[GyroVorbis]

Aha! Thanks.