[OZAPRS] Math Question

[Kevin Dawson]

On Fri, Oct 14, 2005 at 08:57:07AM +1000, Darryl Smith wrote:
> 
> I am doing some simple coding... I need to work out if two compass
headings
> are within 30 degrees of each other. Simple, eh?
> 
> The issue is what happens if one is at 350 degrees and the other is at
10
> degrees?

Without actually testing it to see if it works, this comes to mind:

--------------------------

/* All angles in degrees */

int
nearby(int heading1, int heading2, int range)
{
	int	diff;

	diff = abs(heading1 - heading2);
	return (diff <= range || diff >= 360 - range);
}

--------------------------

Or did you want it in APL? :-)

Kevin
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