On Sun, 2 May 2004 08:01:20 -0500
Jon Berndt wrote:
> Does anyone know of a simple algorithm to calculate the difference between
> the desired heading and the actual heading, where the angle is given in
> degrees from 0 to 260? The stipulations are that the result must be <= 180.
> For example, you can go from 60 to 340 degrees (counter-clockwise), 110 to
> 280 (clockwise), 290 to 40 (clockwise), etc. The desired result in the
> first case is -80, in the second case, 170, and for the last case, 110. And
> so on ...
> The ideal algorithm will have the fewest trivial operations.
desired heading - actual heading -> difference ( in the range -360 to +360)
if difference < -180 then add 360
if difference >180 then substract 360
Jorge Van Hemelryck
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