Math wizardry

Alex Tweedly alex at
Sat Oct 15 18:25:44 EDT 2005

Roger.E.Eller at wrote:

>Hello Jim(s),
>I was trying to use this function with a real-world problem and it isn't 
>giving me the result (an angle between 1 and 360) that I expected. I have 
>an image object (a scan of some text). The image wasn't scanned straight, 
>so I thought I would draw a grc line in parallel with the text in the 
>scan. I am trying to use the functions above to determine the angle of the 
>grc line object so that I can rotate the image to make it straight. The 
>function always returns a number that is less than 3. Can someone explain 
>why this is or offer another way to determine the angle of a line? Math is 
>NOT my strength.
There are two "scales" used to measure angle
 - degrees (from 0 to 360 for the complete circle)
 - radians (from 0 to pi for the complete circle)

So simply multiply your result by  (360 / pi)

Alex Tweedly

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