Re: Incrementing or decrementing a heading in radians

[Asher Dunn <asher at fireyesoftware dot com>]

On Aug 31, 2005, at 12:44 AM, Martin Dillon wrote:

> > Using ATan2, right?
> Actually I'm using ATan.  I then parse the result depending on the 
> quadrant
> that x2,y2 falls in relative to x1,y1, but I eventually get the right 
> answer
> (i.e. D the direction from x1,y1 to x2,y2).
If you need the heading from (x1, y1) to (x2, y2), could you not say:

angle = atan2(x2 - x1, y2 - y1)

?

Asher Dunn
--------------------------------------------------------
President and Head Developer of Fireye Software 
<http://www.fireyesoftware.com/>
AIM, Yahoo, MSN: crazedglkid

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