Computing heading

Frank Shearar frank.shearar at
Mon Jan 5 13:10:07 UTC 2004

Bert Freudenberg wrote:

> And that's about it. You can browse the implementation of
> #bearingToPoint: to see the formula used. I'll attach my own
> project as
> an example.

Shouldn't #bearingToPoint: use #radiansToDegrees instead of a constant?
In other words,

    ^ ((deltaX >= 0 ifTrue: [90] ifFalse: [270])
            - ((deltaY / deltaX) arcTan negated radiansToDegrees)) rounded

Since I'm reasonably sure the above isn't insane, I'll write some test cases
for #radiansToDegrees and post that plus the above change to the list.


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