I am rapidly realizing I should have paid more attention in my Triganometry and Geometry classes.

I am using zexy's [cart2pol] to convert x,y coordinates to polar coordinates and [rad2deg] to convert the angular data to degrees. The problem I am having is that when it converts the Phi it makes half the circle + and the other half -. Is there any "simple" way to convert x,y data so that the angle amount continues positive until it hits 360 degrees? I think it would make the rest of my computations simpler.

Thanks,
Bill

hm could you specify what you actually want to do? Schouldn't be too hard to calculatat all . Ok lets guess: You got some cordinates x and y and then get the degree between the x axes and a line from origin to your cordinate. This will give values from 0-180 and -180-0
http://en.wikipedia.org/wiki/Polar_coordinate_system#Converting_between_polar_and_Cartesian_coordinates

Hi,

have a look at the attached patch: I added a abstraction "set_positive";
actually it does not touch x,y but set the phi to positive values...
Don't know if it this what you mean..

Alberto

http://www.pdpatchrepo.info/hurleur/test_phi.pd

It would take awhile to explain exactly what I want to do with this but you have most of it right. The big challenge is that I want to get 0-360 degrees. I could use radians but it needs to be (0, 2pi) not (-pi, pi).
Hm. Looking at the wikipedia page I may have to use two formulae. X should never=0 and Y could be anything. No, make that 3 formulae since x will be <0 at times. Double hm.
Thanks for the link, I didn't think to look there.

Bill

And that's why I come to this forum. Smart people live here.
Alberto, that should do exactly what I wanted.

Thanks a heap,
Bill