IsAngleBetweenAngles

[Zacharias]

IsAngleBetweenAngles(real match, real max, real min)
by Zacharias

This is a function to check if an angle is between two other angles. It returns true if max>match>min.
The function it self is not complex, but full of math added some comments for those who want to study this function

function IsAngleBetweenAngles takes real Match, real Max, real Min returns boolean
    // note: all operations do only modify the interval of match, min and max

    // set match, max, min to interval [0,2*PI)
    set Match = ModuloReal(Match,2*bj_PI)
    set Max = ModuloReal(Max,2*bj_PI)
    set Min = ModuloReal(Min,2*bj_PI)
    
    // bring min under match, even if min gets negative
    // min e (-2*PI,2*PI)
    loop
        exitwhen Match >= Min
        set Min = Min - 2*bj_PI
    endloop
    // bring max over min (max is positive (modulo))
    // max > min, max e [0,2*PI)
    loop
        exitwhen Max > Min
        set Max = Max + 2*bj_PI
    endloop
    // as min is over -2*PI, max cant get negative through the following function
    loop
        exitwhen (Max-Min) < 2*bj_PI
        set Max = Max - 2*bj_PI
    endloop
    
    // result:
    // max > min
    // min e (-2*PI,2*PI)
    // max e [0,2*PI)
    // match e [0,2*PI)

    return (Max>=Match)
endfunction

 

[Hanky]

I think this fit more in the small snippets thread than here because it's just one function.

 

[Zacharias]

I think this fit more in the small snippets thread than here because it's just one function.

Yes of course, is there a snippet-submission-thread? sry didn´t notice that...

 

[Hanky]

Sure there is: http://www.hiveworkshop.com/forums/f413/small-code-snippets-40758/

 

[Zacharias]

Posted there. Could you plz delete this thread? thx.