From:	Martin Ambuhl <mambuhl AT earthlink DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: angle
Date:	Wed, 03 Mar 1999 13:53:32 -0500
References:	<36dd5abb DOT 0 AT news DOT sbbs DOT se> <36DD5FEC DOT 840A4B7 AT unb DOT ca>
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Endlisnis wrote:
> 
> Erik Johansson wrote:
> 
> > Lets say I have two points on the screen. (x1,y1) and (x2,y2)
> > And then I draw a line between the points.
> > How can I calculate the angle of that line in degrees?
> >
> > thanx in advance
> > /erik
> 
> angle = atan(y2-y1, x2-x1) * (180/M_PI);
          ^^^^ 
should be atan2.  atan() takes a single argument.           

-- 
Martin Ambuhl (mambuhl AT earthlink DOT net)
Note: mambuhl AT tiac DOT net will soon be inactive

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